arcgis.learn module

Functions for calling the Deep Learning Tools.

Data Preparation Methods

export_training_data

arcgis.learn.export_training_data(input_raster, input_class_data=None, chip_format=None, tile_size=None, stride_size=None, metadata_format=None, classvalue_field=None, buffer_radius=None, output_location=None, context=None, input_mask_polygons=None, rotation_angle=0, reference_system='MAP_SPACE', process_all_raster_items=False, blacken_around_feature=False, fix_chip_size=True, *, gis=None, future=False, **kwargs)

Function is designed to generate training sample image chips from the input imagery data with labeled vector data or classified images. The output of this service tool is the data store string where the output image chips, labels and metadata files are going to be stored.

Argument	Description
input_raster	Required. Raster layer that needs to be exported for training.
input_class_data	Labeled data, either a feature layer or image layer. Vector inputs should follow a training sample format as generated by the ArcGIS Pro Training Sample Manager. Raster inputs should follow a classified raster format as generated by the Classify Raster tool.
chip_format	Optional string. The raster format for the image chip outputs. TIFF: TIFF format PNG: PNG format JPEG: JPEG format MRF: MRF (Meta Raster Format)
tile_size	Optional dictionary. The size of the image chips. Example: {“x”: 256, “y”: 256}
stride_size	Optional dictionary. The distance to move in the X and Y when creating the next image chip. When stride is equal to the tile size, there will be no overlap. When stride is equal to half of the tile size, there will be 50% overlap. Example: {“x”: 128, “y”: 128}
metadata_format	Optional string. The format of the output metadata labels. There are 4 options for output metadata labels for the training data, KITTI Rectangles, PASCAL VOCrectangles, Classified Tiles (a class map) and RCNN_Masks. If your input training sample data is a feature class layer such as building layer or standard classification training sample file, use the KITTI or PASCAL VOC rectangle option. The output metadata is a .txt file or .xml file containing the training sample data contained in the minimum bounding rectangle. The name of the metadata file matches the input source image name. If your input training sample data is a class map, use the Classified Tiles as your output metadata format option. KITTI_rectangles: The metadata follows the same format as the Karlsruhe Institute of Technology and Toyota Technological Institute (KITTI) Object Detection Evaluation dataset. The KITTI dataset is a vision benchmark suite. This is the default.The label files are plain text files. All values, both numerical or strings, are separated by spaces, and each row corresponds to one object. This format can be used with FasterRCNN, RetinaNet, SingleShotDetector and YOLOv3 models. PASCAL_VOC_rectangles: The metadata follows the same format as the Pattern Analysis, Statistical Modeling and Computational Learning, Visual Object Classes (PASCAL_VOC) dataset. The PASCAL VOC dataset is a standardized image data set for object class recognition.The label files are XML files and contain information about image name, class value, and bounding box(es). This format can be used with FasterRCNN, RetinaNet, SingleShotDetector and YOLOv3 models. Classified_Tiles: This option will output one classified image chip per input image chip. No other meta data for each image chip. Only the statistics output has more information on the classes such as class names, class values, and output statistics. This format can be used with BDCNEdgeDetector, DeepLab, HEDEdgeDetector, MultiTaskRoadExtractor, PSPNetClassifier and UnetClassifier models. RCNN_Masks: This option will output image chips that have a mask on the areas where the sample exists. The model generates bounding boxes and segmentation masks for each instance of an object in the image. This format can be used with MaskRCNN model. Labeled_Tiles: This option will label each output tile with a specific class. This format is used for image classification. This format can be used with FeatureClassifier model. Multi-labeled Tiles: Each output tile will be labeled with one or more classes. For example, a tile may be labeled agriculture and also cloudy. This format is used for object classification. This format can be used with FeatureClassifier model. Export Tiles: The output will be image chips with no label. This format is used for image enhancement techniques such as Super Resolution and Change Detection. This format can be used with ChangeDetector, CycleGAN, Pix2Pix and SuperResolution models.
classvalue_field	Optional string. Specifies the field which contains the class values. If no field is specified, the system will look for a ‘value’ or ‘classvalue’ field. If this feature does not contain a class field, the system will presume all records belong the 1 class.
buffer_radius	Optional integer. Specifies a radius for point feature classes to specify training sample area.
output_location	This is the output location for training sample data. It can be the server data store path or a shared file system path. Example: Server datastore path - /fileShares/deeplearning/rooftoptrainingsamples /rasterStores/rasterstorename/rooftoptrainingsamples /cloudStores/cloudstorename/rooftoptrainingsamples File share path - \\servername\deeplearning\rooftoptrainingsamples
context	Optional dictionary. Context contains additional settings that affect task execution. Dictionary can contain value for following keys: exportAllTiles - Choose if the image chips with overlapped labeled data will be exported. True - Export all the image chips, including those that do not overlap labeled data. False - Export only the image chips that overlap the labelled data. This is the default. startIndex - Allows you to set the start index for the sequence of image chips. This lets you append more image chips to an existing sequence. The default value is 0. cellSize - cell size can be set using this key in context parameter extent - Sets the processing extent used by the function Setting context parameter will override the values set using arcgis.env variable for this particular function.(cellSize, extent) eg: {“exportAllTiles” : False, “startIndex”: 0 }
input_mask_polygons	Optional feature layer. The feature layer that delineates the area where image chips will be created. Only image chips that fall completely within the polygons will be created.
rotation_angle	Optional float. The rotation angle that will be used to generate additional image chips. An image chip will be generated with a rotation angle of 0, which means no rotation. It will then be rotated at the specified angle to create an additional image chip. The same training samples will be captured at multiple angles in multiple image chips for data augmentation. The default rotation angle is 0.
reference_system	Optional string. Specifies the type of reference system to be used to interpret the input image. The reference system specified should match the reference system used to train the deep learning model. MAP_SPACE : The input image is in a map-based coordinate system. This is the default. IMAGE_SPACE : The input image is in image space, viewed from the direction of the sensor that captured the image, and rotated such that the tops of buildings and trees point upward in the image. PIXEL_SPACE : The input image is in image space, with no rotation and no distortion.
process_all_raster_items	Optional bool. Specifies how all raster items in an image service will be processed. False : all raster items in the image service will be mosaicked together and processed. This is the default. True : all raster items in the image service will be processed as separate images.
blacken_around_feature	Optional bool. Specifies whether to blacken the pixels around each object or feature in each image tile. This parameter only applies when the metadata format is set to Labeled_Tiles and an input feature class or classified raster has been specified. False : Pixels surrounding objects or features will not be blackened. This is the default. True : Pixels surrounding objects or features will be blackened.
fix_chip_size	Optional bool. Specifies whether to crop the exported tiles such that they are all the same size. This parameter only applies when the metadata format is set to Labeled_Tiles and an input feature class or classified raster has been specified. True : Exported tiles will be the same size and will center on the feature. This is the default. False : Exported tiles will be cropped such that the bounding geometry surrounds only the feature in the tile.
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

Output string containing the location of the exported training data

export_point_dataset

arcgis.learn.export_point_dataset(data_path, output_path, block_size=50.0, max_points=8192, extra_features=[], **kwargs)

Exports the las files into h5 blocks.

Argument	Description
data_path	Required string. Folder containing two folders with las files. Folder structure: train/ *.las val/ *.las
output_path	Required string. Path where exported files will be dumped. This directory either should be empty or be a totally new directory.
block_size	Optional float. Size of the h5 block file. The unit of this parameter is the same as that of the dataset’s coordinate system. Default: 50.0 Units. The default value is based on the assumption that dataset’s coordinate system is in metric units.
max_points	Optional integer. Maximum number of points to be included in each h5 block file. Default: 8192 points.
extra_features	Optional list of tuple. Extra features to read from las files. The length of tuple is 3, which contain feature name, max, and min values respectively. For example: If you want extra features like intensity or number of returns to be considered while training, set this parameter like: extra_features=[(‘intensity’, 5000, 0), (‘num_returns’, 5, 0)]. The default behavior has changed from v1.8.0. Default: [].

prepare_data

arcgis.learn.prepare_data(path, class_mapping=None, chip_size=224, val_split_pct=0.1, batch_size=64, transforms=None, collate_fn=<function _bb_pad_collate>, seed=42, dataset_type=None, resize_to=None, **kwargs)

Prepares a data object from training sample exported by the Export Training Data tool in ArcGIS Pro or Image Server, or training samples in the supported dataset formats. This data object consists of training and validation data sets with the specified transformations, chip size, batch size, split percentage, etc. -For object detection, use Pascal_VOC_rectangles or KITTI_rectangles format. -For feature categorization use Labelled Tiles or ImageNet format. -For pixel classification, use Classified Tiles format. -For entity extraction from text, use IOB, BILUO or ner_json formats.

Argument	Description
path	Required string. Path to data directory.
class_mapping	Optional dictionary. Mapping from id to its string label. For dataset_type=IOB, BILUO or ner_json: Provide address field as class mapping in below format: class_mapping={‘address_tag’:’address_field’}. Field defined as ‘address_tag’ will be treated as a location. In cases where trained model extracts multiple locations from a single document, that document will be replicated for each location.
chip_size	Optional integer, default 224. Size of the image to train the model. Images are cropped to the specified chip_size. If image size is less than chip_size, the image size is used as chip_size. Not supported for superres.
val_split_pct	Optional float. Percentage of training data to keep as validation.
batch_size	Optional integer. Batch size for mini batch gradient descent (Reduce it if getting CUDA Out of Memory Errors). Batch size is required to be greater than 1.
transforms	Optional tuple. Fast.ai transforms for data augmentation of training and validation datasets respectively (We have set good defaults which work for satellite imagery well). If transforms is set to False no transformation will take place and chip_size parameter will also not take effect. If the dataset_type is ‘PointCloud’, use Transform3d class from arcgis.learn.
collate_fn	Optional function. Passed to PyTorch to collate data into batches(usually default works).
seed	Optional integer. Random seed for reproducible train-validation split.
dataset_type	Optional string. prepare_data function will infer the dataset_type on its own if it contains a map.txt file. If the path does not contain the map.txt file pass either of ‘PASCAL_VOC_rectangles’, ‘KITTI_rectangles’, ‘RCNN_Masks’, ‘Classified_Tiles’, ‘Labeled_Tiles’, ‘MultiLabeled_Tiles’, ‘Imagenet’, ‘PointCloud’, ‘ImageCaptioning’, ‘ChangeDetection’, ‘superres’, ‘CycleGAN’ and ‘Pix2Pix’. This parameter is mandatory for data which are not exported by ArcGIS Pro / Enterprise which includes ‘PointCloud’, ‘ImageCaptioning’, ‘ChangeDetection’, ‘CycleGAN’ and ‘Pix2Pix’. This parameter is also mandatory while preparing data for ‘EntityRecognizer’ model. Accepted data format for this model are - [‘ner_json’,’BIO’, ‘LBIOU’].
resize_to	Optional integer. Resize the images to a given size. Works only for “PASCAL_VOC_rectangles” and “superres”. First resizes the image to the given size and then crops images of size equal to chip_size. Note: Keep chip_size < resize_to

Keyword Arguments

Argument	Description
imagery_type	Optional string. Type of imagery used to export the training data, valid values are: ‘naip’ ‘sentinel2’ ‘landsat8’ ‘ms’ - any other type of imagery
bands	Optional list. Bands of the imagery used to export training data. For example [‘r’, ‘g’, ‘b’, ‘nir’, ‘u’] where ‘nir’ is near infrared band and ‘u’ is a miscellaneous band.
rgb_bands	Optional list. Indices of red, green and blue bands in the imagery used to export the training data. for example: [2, 1, 0]
extract_bands	Optional list. Indices of bands to be used for training the model, same as in the imagery used to export the training data. for example: [3, 1, 0] where we will not be using the band at index 2 to train our model.
norm_pct	Optional float. Percentage of training data to be used for calculating imagery statistics for normalizing the data. Default is 0.3 (30%) of data.
downsample_factor	Optional integer. Factor to downsample the images for image SuperResolution. for example: if value is 2 and image size 256x256, it will create label images of size 128x128. Default is 4
encoding	Optional string. Applicable only when dataset_type=IOB, BILUO or ner_json: The encoding to read the csv/json file. Default is ‘UTF-8’

Returns

data object

prepare_tabulardata

arcgis.learn.prepare_tabulardata(input_features=None, variable_predict=None, explanatory_variables=None, explanatory_rasters=None, date_field=None, distance_features=None, preprocessors=None, val_split_pct=0.1, seed=42, batch_size=64, index_field=None)

Prepares a tabular data object from input_features and optionally rasters.

Argument	Description
input_features	Optional Feature Layer Object or spatially enabled dataframe. This contains features denoting the value of the dependent variable. Leave empty for using rasters with MLModel.
variable_predict	Optional String, denoting the field_name of the variable to predict. Keep none for unsupervised training using MLModel.
explanatory_variables	Optional list containing field names from input_features By default the field type is continuous. To override field type to categorical, pass a 2-sized tuple in the list containing: field to be taken as input from the input_features. True/False denoting Categorical/Continuous variable. For example: [“Field_1”, (“Field_2”, True)] Here Field_1 is treated as continuous and Field_2 as categorical.
explanatory_rasters	Optional list containing Raster objects. By default the rasters are continuous. To mark a raster categorical, pass a 2-sized tuple containing: Raster object. True/False denoting Categorical/Continuous variable. For example: [raster_1, (raster_2, True)] Here raster_1 is treated as continuous and raster_2 as categorical.
date_field	Optional field_name. This field contains the date in the input_features. The field type can be a string or date time field. If specified, the field will be split into Year, month, week, day, dayofweek, dayofyear, is_month_end, is_month_start, is_quarter_end, is_quarter_start, is_year_end, is_year_start, hour, minute, second, elapsed and these will be added to the prepared data as columns. All fields other than elapsed and dayofyear are treated as categorical.
distance_features	Optional list of Feature Layer objects. Distance is calculated from features in these layers to features in input_features. Nearest distance to each feature is added in the prepared data. Field names in the prepared data added are “NEAR_DIST_1”, “NEAR_DIST_2” etc.
preprocessors	For Fastai: Optional transforms list. For Scikit-learn: 1. Supply a column transformer object. 2. Supply a list of tuple, For example: [(‘Col_1’, ‘Col_2’, Transform1()), (‘Col_3’, Transform2())] Categorical data is by default encoded. If nothing is specified, default transforms are applied to fill missing values and normalize categorical data. For Raster use raster.name for the the first band, raster.name_1 for 2nd band, raster.name_2 for 3rd and so on.
val_split_pct	Optional float. Percentage of training data to keep as validation. By default 10% data is kept for validation.
seed	Optional integer. Random seed for reproducible train-validation split. Default value is 42.
batch_size	Optional integer. Batch size for mini batch gradient descent (Reduce it if getting CUDA Out of Memory Errors). Default value is 64.
index_field	Optional string. Field Name in the input features which will be used as index field for the data. Used for Time Series, to visualize values on the x-axis.

Returns

TabularData object

prepare_textdata

arcgis.learn.prepare_textdata(path, task, text_columns, label_columns, train_file='train.csv', valid_file=None, val_split_pct=0.1, seed=42, batch_size=8, process_labels=False, remove_html_tags=False, remove_urls=False)

Prepares a text data object from the files present at data folder

Argument	Description
path	Required directory path. The directory path where the training and validation files are present.
task	Required string. The task for which the dataset is prepared. Available choice at this point is “classification” and “sequence_translation”.
text_columns	Required string. The column that will be used as feature.
label_columns	Required list. The list of columns denoting the class label/translated text to predict. Provide a list of columns in case of multi-label classification problem
train_file	Optional string. The file name containing the training data. Supported file formats/extensions are .csv and .tsv Default value is train.csv
valid_file	Optional string. The file name containing the validation data. Supported file formats/extensions are .csv and .tsv. Default value is None. If None then some portion of the training data will be kept for validation (based on the value of val_split_pct parameter)
val_split_pct	Optional float. Percentage of training data to keep as validation. By default 10% data is kept for validation.
seed	Optional integer. Random seed for reproducible train-validation split. Default value is 42.
batch_size	Optional integer. Batch size for mini batch gradient descent (Reduce it if getting CUDA Out of Memory Errors). Default value is 16.
process_labels	Optional boolean. If true, default processing functions will be called on label columns as well. Default value is False.
remove_html_tags	Optional boolean. If true, remove html tags from text. Default value is False.
remove_urls	Optional boolean. If true, remove urls from text. Default value is False.

Returns

TextData object

Object Classification Models

FeatureClassifier

class arcgis.learn.FeatureClassifier(data, backbone=None, pretrained_path=None, mixup=False, oversample=False, backend='pytorch', *args, **kwargs)

Creates an image classifier to classify the area occupied by a geographical feature based on the imagery it overlaps with.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional torchvision model. Backbone CNN model to be used for creating the base of the FeatureClassifier, which is resnet34 by default.
pretrained_path	Optional string. Path where pre-trained model is saved.
mixup	Optional boolean. If set to True, it creates new training images by randomly mixing training set images. The default is set to False.
oversample	Optional boolean. If set to True, it oversamples unbalanced classes of the dataset during training. Not supported with MultiLabel dataset.
backend	Optional string. Controls the backend framework to be used for this model, which is ‘pytorch’ by default. valid options are ‘pytorch’, ‘tensorflow’

Returns

FeatureClassifier Object

categorize_features(feature_layer, raster=None, class_value_field='class_val', class_name_field='prediction', confidence_field='confidence', cell_size=1, coordinate_system=None, predict_function=None, batch_size=64, overwrite=False)

Deprecated since version 1.7.1: Please use arcgis.learn.classify_objects() instead

Categorizes each feature by classifying its attachments or an image of its geographical area (using the provided Imagery Layer) and updates the feature layer with the prediction results in the output_label_field. Deprecated, please use arcgis.learn.classify_objects() instead.

Argument	Description
feature_layer	Required. Public Feature Layer or path of local feature class for classification with read, write, edit permissions.
raster	Optional. Imagery layer or path of local raster to be used for exporting image chips. (Requires arcpy)
class_value_field	Required string. Output field to be added in the layer, containing class value of predictions.
class_name_field	Required string. Output field to be added in the layer, containing class name of predictions.
confidence_field	Optional string. Output column name to be added in the layer which contains the confidence score.
cell_size	Optional float. Cell size to be used for exporting the image chips.
coordinate_system	Optional. Cartographic Coordinate System to be used for exporting the image chips.
predict_function	Optional list of tuples. Used for calculation of final prediction result when each feature has more than one attachment. The predict_function takes as input a list of tuples. Each tuple has first element as the class predicted and second element is the confidence score. The function should return the final tuple classifying the feature and its confidence.
batch_size	Optional integer. The no of images or tiles to process in a single go. The default value is 64.
overwrite	Optional boolean. If set to True the output fields will be overwritten by new values. The default value is False.

Returns

Boolean : True if operation is successful, False otherwise

classify_features(feature_layer, labeled_tiles_directory, input_label_field, output_label_field, confidence_field=None, predict_function=None)

Classifies the exported images and updates the feature layer with the prediction results in the output_label_field. Works with RGB images only.

Argument	Description
feature_layer	Required. Feature Layer for classification.
labeled_tiles_directory	Required. Folder structure containing images and labels folder. The chips should have been generated using the export training data tool in the Labeled Tiles format, and the labels should contain the OBJECTIDs of the features to be classified.
input_label_field	Required. Value field name which created the labeled tiles. This field should contain the OBJECTIDs of the features to be classified. In case of attachments this field is not used.
output_label_field	Required. Output column name to be added in the layer which contains predictions.
confidence_field	Optional. Output column name to be added in the layer which contains the confidence score.
predict_function	Optional. Used for calculation of final prediction result when each feature has more than one attachment. The predict_function takes as input a list of tuples. Each tuple has first element as the class predicted and second element is the confidence score. The function should return the final tuple classifying the feature and its confidence

Returns

Boolean : True/False if operation is successful

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a Feature classifier from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

FeatureClassifier Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_confusion_matrix(**kwargs)

Plots a confusion matrix of the model predictions to evaluate accuracy kwargs: ‘thresh’ - confidence score threshold for multilabel predictions, defaults to 0.5

plot_hard_examples(num_examples)

Plots the hard examples with their heatmaps.

Argument	Description
num_examples	Number of hard examples to plot prepare_data function.

plot_losses()

Plot validation and training losses after fitting the model.

predict(img_path)

Runs prediction on an Image. Works with RGB images only.

Argument	Description
image_path	Required. Path to the image file to make the predictions on.

Returns

prediction label and confidence

predict_folder_and_create_layer(folder, feature_layer_name, gis=None, prediction_field='predict', confidence_field='confidence')

Predicts on images present in the given folder and creates a feature layer. The images stored in the folder contain GPS information as part of EXIF metadata. Works with RGB images only.

Argument	Description
folder	Required String. Folder containing images to inference on.
feature_layer_name	Required String. The name of the feature layer used to publish.
gis	Optional GIS Object, the GIS on which this tool runs. If not specified, the active GIS is used.
prediction_field	Optional String. The field name to use to add predictions.
confidence_field	Optional String. The field name to use to add confidence.

Returns

FeatureCollection Object

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

Object Detection Models

FasterRCNN

class arcgis.learn.FasterRCNN(data, backbone='resnet50', pretrained_path=None, **kwargs)

Model architecture from https://arxiv.org/abs/1506.01497. Creates a FasterRCNN object detection model, based on https://github.com/pytorch/vision/blob/master/torchvision/models/detection/faster_rcnn.py.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the FasterRCNN, which is resnet50 by default. Compatible backbones: ‘resnet18’, ‘resnet34’, ‘resnet50’, ‘resnet101’, ‘resnet152’
pretrained_path	Optional string. Path where pre-trained model is saved.

kwargs

Argument	Description
rpn_pre_nms_top_n_train	Optional int. Number of proposals to keep before applying NMS during training. Default: 2000
rpn_pre_nms_top_n_test	Optional int. Number of proposals to keep before applying NMS during testing. Default: 1000
rpn_post_nms_top_n_train	Optional int. Number of proposals to keep after applying NMS during training. Default: 2000
rpn_post_nms_top_n_test	Optional int. Number of proposals to keep after applying NMS during testing. Default: 1000
rpn_nms_thresh	Optional float. NMS threshold used for postprocessing the RPN proposals. Default: 0.7
rpn_fg_iou_thresh	Optional float. Minimum IoU between the anchor and the GT box so that they can be considered as positive during training of the RPN. Default: 0.7
rpn_bg_iou_thresh	Optional float. Maximum IoU between the anchor and the GT box so that they can be considered as negative during training of the RPN. Default: 0.3
rpn_batch_size_per_image	Optional int. Number of anchors that are sampled during training of the RPN for computing the loss. Default: 256
rpn_positive_fraction	Optional float. Proportion of positive anchors in a mini-batch during training of the RPN. Default: 0.5
box_score_thresh	Optional float. During inference, only return proposals with a classification score greater than box_score_thresh Default: 0.05
box_nms_thresh	Optional float. NMS threshold for the prediction head. Used during inference. Default: 0.5
box_detections_per_img	Optional int. Maximum number of detections per image, for all classes. Default: 100
box_fg_iou_thresh	Optional float. Minimum IoU between the proposals and the GT box so that they can be considered as positive during training of the classification head. Default: 0.5
box_bg_iou_thresh	Optional float. Maximum IoU between the proposals and the GT box so that they can be considered as negative during training of the classification head. Default: 0.5
box_batch_size_per_image	Optional int. Number of proposals that are sampled during training of the classification head. Default: 512
box_positive_fraction	Optional float. Proportion of positive proposals in a mini-batch during training of the classification head. Default: 0.25

Returns

FasterRCNN Object

average_precision_score(detect_thresh=0.2, iou_thresh=0.1, mean=False, show_progress=True)

Computes average precision on the validation set for each class.

Argument	Description
detect_thresh	Optional float. The probability above which a detection will be considered for computing average precision.
iou_thresh	Optional float. The intersection over union threshold with the ground truth labels, above which a predicted bounding box will be considered a true positive.
mean	Optional bool. If False returns class-wise average precision otherwise returns mean average precision.

Returns

dict if mean is False otherwise float

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a FasterRCNN object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

FasterRCNN Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(image_path, threshold=0.5, nms_overlap=0.1, return_scores=False, visualize=False, resize=False)

Runs prediction on an Image.

Argument	Description
image_path	Required. Path to the image file to make the predictions on.
threshold	Optional float. The probability above which a detection will be considered valid.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
return_scores	Optional boolean. Will return the probability scores of the bounding box predictions if True.
visualize	Optional boolean. Displays the image with predicted bounding boxes if True.
resize	Optional boolean. Resizes the image to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the image is resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the image (of the same size as the model was trained on).

Returns

Returns a tuple with predictions, labels and optionally confidence scores if return_scores=True. The predicted bounding boxes are returned as a list of lists containing the xmin, ymin, width and height of each predicted object in each image. The labels are returned as a list of class values and the confidence scores are returned as a list of floats indicating the confidence of each prediction.

predict_video(input_video_path, metadata_file, threshold=0.5, nms_overlap=0.1, track=False, visualize=False, output_file_path=None, multiplex=False, multiplex_file_path=None, tracker_options={'assignment_iou_thrd': 0.3, 'detect_frames': 10, 'vanish_frames': 40}, visual_options={'color': (255, 255, 255), 'fontface': 0, 'show_labels': True, 'show_scores': True, 'thickness': 2}, resize=False)

Runs prediction on a video and appends the output VMTI predictions in the metadata file.

Argument	Description
input_video_path	Required. Path to the video file to make the predictions on.
metadata_file	Required. Path to the metadata csv file where the predictions will be saved in VMTI format.
threshold	Optional float. The probability above which a detection will be considered.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
track	Optional bool. Set this parameter as True to enable object tracking.
visualize	Optional boolean. If True a video is saved with prediction results.
output_file_path	Optional path. Path of the final video to be saved. If not supplied, video will be saved at path input_video_path appended with _prediction.
multiplex	Optional boolean. Runs Multiplex using the VMTI detections.
multiplex_file_path	Optional path. Path of the multiplexed video to be saved. By default a new file with _multiplex.MOV extension is saved in the same folder.
tracking_options	Optional dictionary. Set different parameters for object tracking. assignment_iou_thrd parameter is used to assign threshold for assignment of trackers, vanish_frames is the number of frames the object should be absent to consider it as vanished, detect_frames is the number of frames an object should be detected to track it.
visual_options	Optional dictionary. Set different parameters for visualization. show_scores boolean, to view scores on predictions, show_labels boolean, to view labels on predictions, thickness integer, to set the thickness level of box, fontface integer, fontface value from opencv values, color tuple (B, G, R), tuple containing values between 0-255.
resize	Optional boolean. Resizes the video frames to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the video frames are resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the frame (of the same size as the model was trained on).

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.5, nms_overlap=0.1)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

RetinaNet

class arcgis.learn.RetinaNet(data, scales=None, ratios=None, backbone=None, pretrained_path=None, *args, **kwargs)

Creates a RetinaNet Object Detector with the specified zoom scales and aspect ratios. Based on the Fast.ai notebook at https://github.com/fastai/fastai_dev/blob/master/dev_nb/102a_coco.ipynb

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
scales	Optional list of float values. Zoom scales of anchor boxes.
ratios	Optional list of float values. Aspect ratios of anchor boxes.
backbone	Optional function. Backbone CNN model to be used for creating the base of the RetinaNet, which is resnet50 by default. Compatible backbones: ‘resnet18’, ‘resnet34’, ‘resnet50’, ‘resnet101’, ‘resnet152’
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

RetinaNet Object

average_precision_score(detect_thresh=0.5, iou_thresh=0.1, mean=False, show_progress=True)

Computes average precision on the validation set for each class.

Argument	Description
detect_thresh	Optional float. The probability above which a detection will be considered for computing average precision.
iou_thresh	Optional float. The intersection over union threshold with the ground truth labels, above which a predicted bounding box will be considered a true positive.
mean	Optional bool. If False returns class-wise average precision otherwise returns mean average precision.

Returns

dict if mean is False otherwise float

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a RetinaNet Object Detector from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

RetinaNet Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(image_path, threshold=0.5, nms_overlap=0.1, return_scores=True, visualize=False, resize=False)

Predicts and displays the results of a trained model on a single image.

Argument	Description
image_path	Required. Path to the image file to make the predictions on.
thresh	Optional float. The probability above which a detection will be considered valid.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
return_scores	Optional boolean. Will return the probability scores of the bounding box predictions if True.
visualize	Optional boolean. Displays the image with predicted bounding boxes if True.
resize	Optional boolean. Resizes the image to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the image is resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the image (of the same size as the model was trained on).

Returns

‘List’ of xmin, ymin, width, height of predicted bounding boxes on the given image

predict_video(input_video_path, metadata_file, threshold=0.5, nms_overlap=0.1, track=False, visualize=False, output_file_path=None, multiplex=False, multiplex_file_path=None, tracker_options={'assignment_iou_thrd': 0.3, 'detect_frames': 10, 'vanish_frames': 40}, visual_options={'color': (255, 255, 255), 'fontface': 0, 'show_labels': True, 'show_scores': True, 'thickness': 2}, resize=False)

Runs prediction on a video and appends the output VMTI predictions in the metadata file.

Argument	Description
input_video_path	Required. Path to the video file to make the predictions on.
metadata_file	Required. Path to the metadata csv file where the predictions will be saved in VMTI format.
threshold	Optional float. The probability above which a detection will be considered.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
track	Optional bool. Set this parameter as True to enable object tracking.
visualize	Optional boolean. If True a video is saved with prediction results.
output_file_path	Optional path. Path of the final video to be saved. If not supplied, video will be saved at path input_video_path appended with _prediction.
multiplex	Optional boolean. Runs Multiplex using the VMTI detections.
multiplex_file_path	Optional path. Path of the multiplexed video to be saved. By default a new file with _multiplex.MOV extension is saved in the same folder.
tracking_options	Optional dictionary. Set different parameters for object tracking. assignment_iou_thrd parameter is used to assign threshold for assignment of trackers, vanish_frames is the number of frames the object should be absent to consider it as vanished, detect_frames is the number of frames an object should be detected to track it.
visual_options	Optional dictionary. Set different parameters for visualization. show_scores boolean, to view scores on predictions, show_labels boolean, to view labels on predictions, thickness integer, to set the thickness level of box, fontface integer, fontface value from opencv values, color tuple (B, G, R), tuple containing values between 0-255.
resize	Optional boolean. Resizes the video frames to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the video frames are resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the frame (of the same size as the model was trained on).

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.5, nms_overlap=0.1)

Displays the results of a trained model on a part of the validation set.

Argument	Description
rows	Optional int. Number of rows of results to be displayed.
thresh	Optional float. The probability above which a detection will be considered valid.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

YOLOv3

class arcgis.learn.YOLOv3(data=None, pretrained_path=None, **kwargs)

Creates a YOLOv3 object detector.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

YOLOv3 Object

average_precision_score(detect_thresh=0.1, iou_thresh=0.1, mean=False, show_progress=True)

Computes average precision on the validation set for each class.

Argument	Description
detect_thresh	Optional float. The probability above which a detection will be considered for computing average precision. Defaults to 0.1. To be modified according to the dataset and training.
iou_thresh	Optional float. The intersection over union threshold with the ground truth labels, above which a predicted bounding box will be considered a true positive.
mean	Optional bool. If False returns class-wise average precision otherwise returns mean average precision.

Returns

dict if mean is False otherwise float

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a YOLOv3 Object Detector from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

YOLOv3 Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(image_path, threshold=0.1, nms_overlap=0.1, return_scores=True, visualize=False, resize=False)

Predicts and displays the results of a trained model on a single image.

Argument	Description
image_path	Required. Path to the image file to make the predictions on.
thresh	Optional float. The probability above which a detection will be considered valid. Defaults to 0.1. To be modified according to the dataset and training.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
return_scores	Optional boolean. Will return the probability scores of the bounding box predictions if True.
visualize	Optional boolean. Displays the image with predicted bounding boxes if True.
resize	Optional boolean. Resizes the image to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the image is resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the image (of the same size as the model was trained on).

Returns

‘List’ of xmin, ymin, width, height of predicted bounding boxes on the given image

predict_video(input_video_path, metadata_file, threshold=0.1, nms_overlap=0.1, track=False, visualize=False, output_file_path=None, multiplex=False, multiplex_file_path=None, tracker_options={'assignment_iou_thrd': 0.3, 'detect_frames': 10, 'vanish_frames': 40}, visual_options={'color': (255, 255, 255), 'fontface': 0, 'show_labels': True, 'show_scores': True, 'thickness': 2}, resize=False)

Runs prediction on a video and appends the output VMTI predictions in the metadata file.

Argument	Description
input_video_path	Required. Path to the video file to make the predictions on.
metadata_file	Required. Path to the metadata csv file where the predictions will be saved in VMTI format.
threshold	Optional float. The probability above which a detection will be considered. Defaults to 0.1. To be modified according to the dataset and training.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
track	Optional bool. Set this parameter as True to enable object tracking.
visualize	Optional boolean. If True a video is saved with prediction results.
output_file_path	Optional path. Path of the final video to be saved. If not supplied, video will be saved at path input_video_path appended with _prediction.
multiplex	Optional boolean. Runs Multiplex using the VMTI detections.
multiplex_file_path	Optional path. Path of the multiplexed video to be saved. By default a new file with _multiplex.MOV extension is saved in the same folder.
tracking_options	Optional dictionary. Set different parameters for object tracking. assignment_iou_thrd parameter is used to assign threshold for assignment of trackers, vanish_frames is the number of frames the object should be absent to consider it as vanished, detect_frames is the number of frames an object should be detected to track it.
visual_options	Optional dictionary. Set different parameters for visualization. show_scores boolean, to view scores on predictions, show_labels boolean, to view labels on predictions, thickness integer, to set the thickness level of box, fontface integer, fontface value from opencv values, color tuple (B, G, R), tuple containing values between 0-255.
resize	Optional boolean. Resizes the video frames to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the video frames are resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the frame (of the same size as the model was trained on).

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.1, nms_overlap=0.1)

Displays the results of a trained model on a part of the validation set.

Argument	Description
rows	Optional int. Number of rows of results to be displayed.
thresh	Optional float. The probability above which a detection will be considered valid. Defaults to 0.1. To be modified according to the dataset and training.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.

property supported_backbones

Supported backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

SingleShotDetector

class arcgis.learn.SingleShotDetector(data, grids=None, zooms=[1.0], ratios=[[1.0, 1.0]], backbone=None, drop=0.3, bias=- 4.0, focal_loss=False, pretrained_path=None, location_loss_factor=None, ssd_version=2, backend='pytorch', *args, **kwargs)

Creates a Single Shot Detector with the specified grid sizes, zoom scales and aspect ratios. Based on Fast.ai MOOC Version2 Lesson 9.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
grids	Required list. Grid sizes used for creating anchor boxes.
zooms	Optional list. Zooms of anchor boxes.
ratios	Optional list of tuples. Aspect ratios of anchor boxes.
backbone	Optional function. Backbone CNN model to be used for creating the base of the SingleShotDetector, which is resnet34 by default.
dropout	Optional float. Dropout probability. Increase it to reduce overfitting.
bias	Optional float. Bias for SSD head.
focal_loss	Optional boolean. Uses Focal Loss if True.
pretrained_path	Optional string. Path where pre-trained model is saved.
location_loss_factor	Optional float. Sets the weight of the bounding box loss. This should be strictly between 0 and 1. This is default None which gives equal weight to both location and classification loss. This factor adjusts the focus of model on the location of bounding box.
ssd_version	Optional int within [1,2]. Use version=1 for arcgis v1.6.2 or earlier
backend	Optional string. Controls the backend framework to be used for this model, which is ‘pytorch’ by default. valid options are ‘pytorch’, ‘tensorflow’

Returns

SingleShotDetector Object

average_precision_score(detect_thresh=0.2, iou_thresh=0.1, mean=False, show_progress=True)

Computes average precision on the validation set for each class.

Argument	Description
detect_thresh	Optional float. The probability above which a detection will be considered for computing average precision.
iou_thresh	Optional float. The intersection over union threshold with the ground truth labels, above which a predicted bounding box will be considered a true positive.
mean	Optional bool. If False returns class-wise average precision otherwise returns mean average precision.

Returns

dict if mean is False otherwise float

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_emd(data, emd_path)

Creates a Single Shot Detector from an Esri Model Definition (EMD) file.

Argument	Description
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.
emd_path	Required string. Path to Esri Model Definition file.

Returns

SingleShotDetector Object

classmethod from_model(emd_path, data=None)

Creates a Single Shot Detector from an Esri Model Definition (EMD) file.

Note: Only supported for Pytorch models.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

SingleShotDetector Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(image_path, threshold=0.5, nms_overlap=0.1, return_scores=False, visualize=False, resize=False)

Runs prediction on an Image.

Argument	Description
image_path	Required. Path to the image file to make the predictions on.
threshold	Optional float. The probability above which a detection will be considered valid.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
return_scores	Optional boolean. Will return the probability scores of the bounding box predictions if True.
visualize	Optional boolean. Displays the image with predicted bounding boxes if True.
resize	Optional boolean. Resizes the image to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the image is resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the image (of the same size as the model was trained on).

Returns

‘List’ of xmin, ymin, width, height of predicted bounding boxes on the given image

predict_video(input_video_path, metadata_file, threshold=0.5, nms_overlap=0.1, track=False, visualize=False, output_file_path=None, multiplex=False, multiplex_file_path=None, tracker_options={'assignment_iou_thrd': 0.3, 'detect_frames': 10, 'vanish_frames': 40}, visual_options={'color': (255, 255, 255), 'fontface': 0, 'show_labels': True, 'show_scores': True, 'thickness': 2}, resize=False)

Runs prediction on a video and appends the output VMTI predictions in the metadata file.

Argument	Description
input_video_path	Required. Path to the video file to make the predictions on.
metadata_file	Required. Path to the metadata csv file where the predictions will be saved in VMTI format.
threshold	Optional float. The probability above which a detection will be considered.
nms_overlap	Optional float. The intersection over union threshold with other predicted bounding boxes, above which the box with the highest score will be considered a true positive.
track	Optional bool. Set this parameter as True to enable object tracking.
visualize	Optional boolean. If True a video is saved with prediction results.
output_file_path	Optional path. Path of the final video to be saved. If not supplied, video will be saved at path input_video_path appended with _prediction.
multiplex	Optional boolean. Runs Multiplex using the VMTI detections.
multiplex_file_path	Optional path. Path of the multiplexed video to be saved. By default a new file with _multiplex.MOV extension is saved in the same folder.
tracking_options	Optional dictionary. Set different parameters for object tracking. assignment_iou_thrd parameter is used to assign threshold for assignment of trackers, vanish_frames is the number of frames the object should be absent to consider it as vanished, detect_frames is the number of frames an object should be detected to track it.
visual_options	Optional dictionary. Set different parameters for visualization. show_scores boolean, to view scores on predictions, show_labels boolean, to view labels on predictions, thickness integer, to set the thickness level of box, fontface integer, fontface value from opencv values, color tuple (B, G, R), tuple containing values between 0-255.
resize	Optional boolean. Resizes the video frames to the same size (chip_size parameter in prepare_data) that the model was trained on, before detecting objects. Note that if resize_to parameter was used in prepare_data, the video frames are resized to that size instead. By default, this parameter is false and the detections are run in a sliding window fashion by applying the model on cropped sections of the frame (of the same size as the model was trained on).

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.5, nms_overlap=0.1)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

MaskRCNN

class arcgis.learn.MaskRCNN(data, backbone=None, pretrained_path=None, pointrend=False, *args, **kwargs)

Model architecture from https://arxiv.org/abs/1703.06870. Creates a MaskRCNN Instance segmentation model, based on https://github.com/pytorch/vision/blob/master/torchvision/models/detection/mask_rcnn.py.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the MaskRCNN, which is resnet50 by default. Compatible backbones: ‘resnet18’, ‘resnet34’, ‘resnet50’, ‘resnet101’, ‘resnet152’
pretrained_path	Optional string. Path where pre-trained model is saved.
pointrend	Optional boolean. If True, it will use PointRend architecture on top of the segmentation head. Default: False. PointRend architecture from https://arxiv.org/pdf/1912.08193.pdf.

kwargs

Argument	Description
rpn_pre_nms_top_n_train	Optional int. Number of proposals to keep before applying NMS during training. Default: 2000
rpn_pre_nms_top_n_test	Optional int. Number of proposals to keep before applying NMS during testing. Default: 1000
rpn_post_nms_top_n_train	Optional int. Number of proposals to keep after applying NMS during training. Default: 2000
rpn_post_nms_top_n_test	Optional int. Number of proposals to keep after applying NMS during testing. Default: 1000
rpn_nms_thresh	Optional float. NMS threshold used for postprocessing the RPN proposals. Default: 0.7
rpn_fg_iou_thresh	Optional float. Minimum IoU between the anchor and the GT box so that they can be considered as positive during training of the RPN. Default: 0.7
rpn_bg_iou_thresh	Optional float. Maximum IoU between the anchor and the GT box so that they can be considered as negative during training of the RPN. Default: 0.3
rpn_batch_size_per_image	Optional int. Number of anchors that are sampled during training of the RPN for computing the loss. Default: 256
rpn_positive_fraction	Optional float. Proportion of positive anchors in a mini-batch during training of the RPN. Default: 0.5
box_score_thresh	Optional float. During inference, only return proposals with a classification score greater than box_score_thresh Default: 0.05
box_nms_thresh	Optional float. NMS threshold for the prediction head. Used during inference. Default: 0.5
box_detections_per_img	Optional int. Maximum number of detections per image, for all classes. Default: 100
box_fg_iou_thresh	Optional float. Minimum IoU between the proposals and the GT box so that they can be considered as positive during training of the classification head. Default: 0.5
box_bg_iou_thresh	Optional float. Maximum IoU between the proposals and the GT box so that they can be considered as negative during training of the classification head. Default: 0.5
box_batch_size_per_image	Optional int. Number of proposals that are sampled during training of the classification head. Default: 512
box_positive_fraction	Optional float. Proportion of positive proposals in a mini-batch during training of the classification head. Default: 0.25

Returns

MaskRCNN Object

average_precision_score(detect_thresh=0.5, iou_thresh=0.5, mean=False, show_progress=True)

Computes average precision on the validation set for each class.

Returns

dict if mean is False otherwise float

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None, **kwargs)

Creates a MaskRCNN Instance segmentation object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

MaskRCNN Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=4, mode='mask', mask_threshold=0.5, box_threshold=0.7, imsize=5, index=0, alpha=0.5, cmap='tab20', **kwargs)

Displays the results of a trained model on a part of the validation set.

Argument	Description
mode	Required arguments within [‘bbox’, ‘mask’, ‘bbox_mask’]. bbox - For visualizing only bounding boxes. mask - For visualizing only mask bbox_mask - For visualizing both mask and bounding boxes.
mask_threshold	Optional float. The probability above which a pixel will be considered mask.
box_threshold	Optional float. The probability above which a detection will be considered valid.
nrows	Optional int. Number of rows of results to be displayed.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

Pixel Classification Models

UnetClassifier

class arcgis.learn.UnetClassifier(data, backbone=None, pretrained_path=None, backend='pytorch', *args, **kwargs)

Creates a Unet like classifier based on given pretrained encoder.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the UnetClassifier, which is resnet34 by default.
pretrained_path	Optional string. Path where pre-trained model is saved.
backend	Optional string. Controls the backend framework to be used for this model, which is ‘pytorch’ by default. valid options are ‘pytorch’, ‘tensorflow’

kwargs

Argument	Description
class_balancing	Optional boolean. If True, it will balance the cross-entropy loss inverse to the frequency of pixels per class. Default: False.
mixup	Optional boolean. If True, it will use mixup augmentation and mixup loss. Default: False
focal_loss	Optional boolean. If True, it will use focal loss Default: False
dice_loss_fraction	Optional float. Min_val=0, Max_val=1 If > 0 , model will use a combination of default or focal(if focal=True) loss with the specified fraction of dice loss. E.g. for dice = 0.3, loss = (1-0.3)*default loss + 0.3*dice Default: 0
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []

Returns

UnetClassifier Object

accuracy()

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_emd(data, emd_path)

Creates a Unet like classifier from an Esri Model Definition (EMD) file.

Argument	Description
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.
emd_path	Required string. Path to Esri Model Definition file.

Returns

UnetClassifier Object

classmethod from_model(emd_path, data=None)

Creates a Unet like classifier from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

UnetClassifier Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

mIOU(mean=False, show_progress=True)

Computes mean IOU on the validation set for each class.

Argument	Description
mean	Optional bool. If False returns class-wise mean IOU, otherwise returns mean iou of all classes combined.
show_progress	Optional bool. Displays the progress bar if True.

Returns

dict if mean is False otherwise float

per_class_metrics(ignore_classes=[])

Computer per class precision, recall and f1-score on validation set.

Argument	Description
self	segmentation model object -> [PSPNetClassifier | UnetClassifier | DeepLab]
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []

Returns per class precision, recall and f1 scores

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

PSPNetClassifier

class arcgis.learn.PSPNetClassifier(data, backbone=None, use_unet=True, pyramid_sizes=[1, 2, 3, 6], pretrained_path=None, unet_aux_loss=False, pointrend=False, *args, **kwargs)

Model architecture from https://arxiv.org/abs/1612.01105. Creates a PSPNet Image Segmentation/ Pixel Classification model.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the PSPNetClassifier, which is resnet50 by default. It supports the ResNet, DenseNet, and VGG families.
use_unet	Optional Bool. Specify whether to use Unet-Decoder or not, Default True.
pyramid_sizes	Optional List. The sizes at which the feature map is pooled at. Currently set to the best set reported in the paper, i.e, (1, 2, 3, 6)
pretrained	Optional Bool. If True, use the pretrained backbone
pretrained_path	Optional string. Path where pre-trained PSPNet model is saved.
unet_aux_loss	Optional. Bool If True will use auxiliary loss for PSUnet. Default set to False. This flag is applicable only when use_unet is True.
pointrend	Optional boolean. If True, it will use PointRend architecture on top of the segmentation head. Default: False. PointRend architecture from https://arxiv.org/pdf/1912.08193.pdf.

kwargs

Argument	Description
class_balancing	Optional boolean. If True, it will balance the cross-entropy loss inverse to the frequency of pixels per class. Default: False.
mixup	Optional boolean. If True, it will use mixup augmentation and mixup loss. Default: False
focal_loss	Optional boolean. If True, it will use focal loss. Default: False
dice_loss_fraction	Optional float. Min_val=0, Max_val=1 If > 0 , model will use a combination of default or focal(if focal=True) loss with the specified fraction of dice loss. E.g. for dice = 0.3, loss = (1-0.3)*default loss + 0.3*dice Default: 0
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []
keep_dilation	Optional boolean. When PointRend architecture is used, keep_dilation=True can potentially improves accuracy at the cost of memory consumption. Default: False

Returns

PSPNetClassifier Object

accuracy(input=None, target=None, void_code=0, class_mapping=None)

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

freeze()

Freezes the pretrained backbone.

classmethod from_model(emd_path, data=None)

Creates a PSPNet classifier from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

PSPNetClassifier Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

mIOU(mean=False, show_progress=True)

Computes mean IOU on the validation set for each class.

Argument	Description
mean	Optional bool. If False returns class-wise mean IOU, otherwise returns mean iou of all classes combined.
show_progress	Optional bool. Displays the progress bar if True.

Returns

dict if mean is False otherwise float

per_class_metrics(ignore_classes=[])

Computer per class precision, recall and f1-score on validation set.

Argument	Description
self	segmentation model object -> [PSPNetClassifier | UnetClassifier | DeepLab]
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []

Returns per class precision, recall and f1 scores

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

DeepLab

class arcgis.learn.DeepLab(data, backbone=None, pretrained_path=None, pointrend=False, *args, **kwargs)

Model architecture from https://arxiv.org/abs/1706.05587. Creates a DeepLab Image Segmentation/ Pixel Classification model, based on https://github.com/pytorch/vision/tree/master/torchvision/models/segmentation.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the DeepLab, which is resnet101 by default since it is pretrained in torchvision. It supports the ResNet, DenseNet, and VGG families.
pretrained_path	Optional string. Path where pre-trained model is saved.
pointrend	Optional boolean. If True, it will use PointRend architecture on top of the segmentation head. Default: False. PointRend architecture from https://arxiv.org/pdf/1912.08193.pdf.

kwargs

Argument	Description
class_balancing	Optional boolean. If True, it will balance the cross-entropy loss inverse to the frequency of pixels per class. Default: False.
mixup	Optional boolean. If True, it will use mixup augmentation and mixup loss. Default: False
focal_loss	Optional boolean. If True, it will use focal loss. Default: False
dice_loss_fraction	Optional float. Min_val=0, Max_val=1 If > 0 , model will use a combination of default or focal(if focal=True) loss with the specified fraction of dice loss. E.g. for dice = 0.3, loss = (1-0.3)*default loss + 0.3*dice Default: 0
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []
keep_dilation	Optional boolean. When PointRend architecture is used, keep_dilation=True can potentially improves accuracy at the cost of memory consumption. Default: False

Returns

DeepLab Object

accuracy()

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a DeepLab semantic segmentation object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

DeepLab Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

mIOU(mean=False, show_progress=True)

Computes mean IOU on the validation set for each class.

Argument	Description
mean	Optional bool. If False returns class-wise mean IOU, otherwise returns mean iou of all classes combined.
show_progress	Optional bool. Displays the progress bar if True.

Returns

dict if mean is False otherwise float

per_class_metrics(ignore_classes=[])

Computer per class precision, recall and f1-score on validation set.

Argument	Description
self	segmentation model object -> [PSPNetClassifier | UnetClassifier | DeepLab]
ignore_classes	Optional list. It will contain the list of class values on which model will not incur loss. Default: []

Returns per class precision, recall and f1 scores

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

BDCNEdgeDetector

class arcgis.learn.BDCNEdgeDetector(data, backbone='vgg19', pretrained_path=None)

Model architecture from https://arxiv.org/pdf/1902.10903.pdf. Creates a Bi-Directional Cascade Network for Perceptual Edge Detection model

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the Bi-Directional Cascade Network for Perceptual Edge Detection, which is vgg19 by default. Compatible backbones: resnet and VGG
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

Bi-Directional Cascade Network for Perceptual Edge Detection Object

compute_precision_recall(thresh=0.5, buffer=3, show_progress=True)

Computes precision, recall and f1 score on validation set.

Argument	Description
thresh	Optional float. The probability on which the detection will be considered edge pixel.
buffer	Optional int. pixels in neighborhood to consider true detection.

Returns

dict

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a Bi-Directional Cascade Network for Perceptual Edge Detection object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

Bi-Directional Cascade Network for Perceptual Edge Detection Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.5, thinning=True, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

HEDEdgeDetector

class arcgis.learn.HEDEdgeDetector(data, backbone='vgg19', pretrained_path=None, **kwargs)

Model architecture from https://arxiv.org/pdf/1504.06375.pdf. Creates a Holistically-Nested Edge Detection model

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the Holistically-Nested Edge Detection, which is vgg19 by default. Compatible backbones: resnet and VGG
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

Holistically-Nested Edge Detection Object

compute_precision_recall(thresh=0.5, buffer=3, show_progress=True)

Computes precision, recall and f1 score on validation set.

Argument	Description
thresh	Optional float. The probability on which the detection will be considered edge pixel.
buffer	Optional int. pixels in neighborhood to consider true detection.

Returns

dict

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a Holistically-Nested Edge Detection object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

Holistically-Nested Edge Detection Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5, thresh=0.5, thinning=True, **kwargs)

Displays the results of a trained model on a part of the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

MultiTaskRoadExtractor

class arcgis.learn.MultiTaskRoadExtractor(data, backbone=None, pretrained_path=None, *args, **kwargs)

Creates a Multi-Task Learning model for binary segmentation. Supports 8 bit RGB imagery and offers experimental support for 16 bit RGB imagery. Does not support Multispectral imagery yet. Implementation based on https://doi.org/10.1109/CVPR.2019.01063 .

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional String. Backbone CNN model to be used for creating the base. If hourglass is chosen as the mtl_model (Architecture),then this parameter is ignored as hourglass uses a special customised architecture. This parameter is used with linknet model. Default: ‘resnet34’ Supported backbones: ‘resnet18’, ‘resnet34’, ‘resnet50’, ‘resnet101’, ‘resnet152’
mtl_model	Optional String. It is used to create model from linknet or hourglass based neural architectures. Supported: ‘linknet’, ‘hourglass’. Default: ‘hourglass’
pretrained_path	Optional String. Path where a compatible pre-trained model is saved. Accepts a Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

kwargs

Argument	Description
gaussian_thresh	Optional float. Sets the gaussian threshold which allows to set the required road width. Range: 0.0 to 1.0 Default:0.76
orient_bin_size	Optional Int. Sets the bin size for orientation angles. Default:20
orient_theta	Optional Int. Sets the width of orientation mask. Default:8

Returns

MultiTaskRoadExtractor Object

fit(epoch=10, lr=None, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a Multi-Task Learning model for binary segmentation from a Deep Learning Package(DLPK) or Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

Multi-Task Road Extractor Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=2, **kwargs)

Shows the ground truth and predictions of model side by side.

kwargs

Argument	Description
rows	Number of rows of data to be displayed, if batch size is smaller, then the rows will display the value provided for batch size.
alpha	Optional Float. Opacity parameter for label overlay on image. Float [0.0 - 1.0] Default: 0.6

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

ChangeDetector

class arcgis.learn.ChangeDetector(data, backbone=None, attention_type='PAM', pretrained_path=None, **kwargs)

Creates a Change Detection model.

A Spatial-Temporal Attention-Based Method and a New Dataset for Remote Sensing Image Change Detection - https://www.mdpi.com/2072-4292/12/10/1662

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the encoder of the ChangeDetector, which is resnet18 by default. It supports the ResNet family of backbones.
attention_type	Optional string. It’s value can be either be “PAM” (Pyramid Attention Module) or “BAM” (Basic Attention Module). Defaults to “PAM”.
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

ChangeDetector object

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a ChangeDetector model from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Optional fastai Databunch. Returned data object from prepare_data function or None for inferencing.

Returns

ChangeDetector Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

precision_recall_score()

Computes precision, recall and f1 score.

predict(before_image, after_image, **kwargs)

Predict on a pair of images.

Argument	Description
before_image	Required string. Path to image from before.
after_image	Required string. Path to image from later.

Kwargs

Argument	Description
crop_predict	Optional Boolean. If True, It will predict using a sliding window strategy. Typically, used when image size is larger than the chip_size the model is trained on. Default False.
visualize	Optional Boolean. If True, It will plot the predictions on the notebook. Default False.
save	Optional Boolean. If true will write the prediction file on the disk. Default False.

Returns

PyTorch Tensor of the change mask.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=4, **kwargs)

Displays the results of a trained model on the validation set.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

Image Translation Models

CycleGAN

class arcgis.learn.CycleGAN(data, pretrained_path=None, gen_blocks=9, lsgan=True, *args, **kwargs)

Creates a model object which generates images of type A from type B or type B from type A.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
pretrained_path	Optional string. Path where pre-trained model is saved.
gen_blocks	Optional integer. Number of ResNet blocks to use in generator.
lsgan	Optional boolean. If True, it will use Mean Squared Error else it will use Binary Cross Entropy.

Returns

CycleGAN Object

compute_metrics()

Computes Frechet Inception Distance (FID) on validation set.

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a CycleGAN object from an Esri Model Definition (EMD) file.

Argument	Description
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

Returns

CycleGAN Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(img_path, convert_to)

Predicts and display the image.

Argument	Description
img_path	Required path of an image.
convert_to	‘A’ if we want to generate image of type ‘A’ from type ‘B’ or ‘B’ if we want to generate image of type ‘B’ from type ‘A’ where A and B are the domain specifications that were used while training.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5)

Displays the results of a trained model on a part of the validation set.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

Pix2Pix

class arcgis.learn.Pix2Pix(data, pretrained_path=None, *args, **kwargs)

Creates a model object which generates fake images of type B from type A.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

Pix2Pix Object

compute_metrics()

Computes Frechet Inception Distance (FID) on validation set.

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a Pix2Pix object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

Pix2Pix Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(img_path)

Predicts and display the image.

Argument	Description
img_path	Required path of an image.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5)

Displays the results of a trained model on a part of the validation set.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

SuperResolution

class arcgis.learn.SuperResolution(data, backbone=None, pretrained_path=None, *args, **kwargs)

Creates a model object which increases the resolution and improves the quality of images. Based on Fast.ai MOOC Lesson 7.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the base of the UnetClassifier, which is resnet34 by default. Compatible backbones: ‘resnet18’, ‘resnet34’, ‘resnet50’, ‘resnet101’, ‘resnet152’
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

SuperResolution Object

compute_metrics(accuracy=True, show_progress=True)

Computes Peak Signal-to-Noise Ratio (PSNR) and Structural Similarity Index Measure (SSIM) on validation set.

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_emd(data, emd_path)

Creates a SuperResolution object from an Esri Model Definition (EMD) file.

Argument	Description
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.
emd_path	Required string. Path to Esri Model Definition file.

Returns

SuperResolution Object

classmethod from_model(emd_path, data=None)

Creates a SuperResolution object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

SuperResolution Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(img_path, width=None, height=None)

Predicts and display the image.

Argument	Description
img_path	Required path of an image.
width	Optional int. Width of the predicted output image.
height	Optional int. Height of the predicted output image.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=5)

Displays the results of a trained model on a part of the validation set.

Argument	Description
rows	Optional int. Number of rows of results to be displayed.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

ImageCaptioner

class arcgis.learn.ImageCaptioner(data, backbone=None, pretrained_path=None, **kwargs)

Creates an Image Captioning model.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
backbone	Optional function. Backbone CNN model to be used for creating the encoder of the ImageCaptioner, which is resnet34 by default. It supports the ResNet family of backbones.
pretrained_path	Optional string. Path where pre-trained model is saved.

kwargs

Argument

Description

decoder_params

Optional dictionary. The keys of the dictionary are embed_size, hidden_size, attention_size, teacher_forcing, dropout and pretrained_embeddings. Default values: decoder_params={ ‘embed_size’:100, ‘hidden_size’:100, ‘attention_size’:100, ‘teacher_forcing’:1, ‘dropout’:0.1, ‘pretrained_emb’:False } Parameter Explanation ‘embed_size’: Size of embedding to be used during training. ‘hidden_size’: Size of hidden layer. ‘attention_size’: Size of intermediate attention layer. ‘teacher_forcing’: Probability of teacher forcing. ‘dropout’: Dropout probability. ‘pretrained_emb’: If true, it will use fasttext embeddings.

Returns

ImageCaptioner Object

bleu_score(**kwargs)

Computes bleu score over validation set.

kwargs

Argument	Description
beam_width	Optional int. The size of beam to be used during beam search decoding. Default is 5.
max_len	Optional int. The maximum length of the sentence to be decoded. Default is 20.

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a ImageCaptioner model from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Optional fastai Databunch. Returned data object from prepare_data function or None for inferencing.

Returns

ImageCaptioner Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(path, visualize=True, **kwargs)

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=4, **kwargs)

Shows the ground truth and predictions of model side by side.

kwargs

Argument	Description
beam_width	Optional int. The size of beam to be used during beam search decoding. Default is 5.
max_len	Optional int. The maximum length of the sentence to be decoded. Default is 20.

property supported_backbones

Supported torchvision backbones for this model.

property supported_datasets

Supported dataset types for this model.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

3D Models

PointCNN

class arcgis.learn.PointCNN(data, pretrained_path=None, *args, **kwargs)

Model architecture from https://arxiv.org/abs/1801.07791. Creates a Point Cloud classification model.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
pretrained_path	Optional String. Path where pre-trained model is saved.

kwargs

Argument	Description
encoder_params	Optional dictionary. The keys of the dictionary are out_channels, P, K, D and m. Examples: {‘out_channels’:[16, 32, 64, 96], ‘P’:[-1, 768, 384, 128], ‘K’:[12, 16, 16, 16], ‘D’:[1, 1, 2, 2], ‘m’:8 } Length of out_channels, P, K, D should be same. The length denotes the number of layers in encoder. Parameter Explanation ‘out_channels’: Number of channels produced by each layer, ‘P’: Number of points in each layer, ‘K’: Number of K-nearest neighbor in each layer, ‘D’: Dilation in each layer, ‘m’: Multiplier which is multiplied by each element of out_channel.
dropout	Optional float. This parameter will control overfitting. The range of this parameter is [0,1).
sample_point_num	Optional integer. The number of points that the model will actually process.

Returns

PointCNN Object

compute_precision_recall()

Computes precision, recall and f1-score on the validation sets.

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

kwargs

Argument	Description
iters_per_epoch	Optional integer. The number of iterations to run during the training phase.

classmethod from_model(emd_path, data=None)

Creates an PointCNN model object from a Deep Learning Package(DLPK) or Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

PointCNN Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict_h5(path, output_path=None, **kwargs)

Predicts and writes the resulting las file on the disk. The block size which was used for training will be used for prediction. Coordinate system for the inferencing data & trained model’s training data should be the same.

Argument	Description
path	Required string. The path to folder where the h5 files which needs to be predicted are present.
output_path	Optional string. The path to folder where to dump the resulting h5 block files. Defaults to results folder in input path.

Returns

Path where files are dumped.

predict_las(path, output_path=None, print_metrics=False, **kwargs)

Predicts and writes the resulting las file on the disk. The block size which was used for training will be used for prediction. Coordinate system for the inferencing data & trained model’s training data should be the same.

Argument	Description
path	Required string. The path to folder where the las files which needs to be predicted are present.
output_path	Optional string. The path to folder where to dump the resulting las files. Defaults to results folder in input path.
print_metrics	Optional boolean. If True, precision, recall and f1_score are also calculated and reported. Defaults to False.

kwargs

Argument	Description
remap_classes	Optional dictionary {int:int}. Mapping from class values to user defined values. Please query pointcnn._data.classes to get the class values on which the model is trained on. Default is {}.
selective_classify	Optional list of integers. If passed, predict_las will selectively classify only those points belonging to the specified class-codes. Other points in the input point clouds will retain their class-codes. Please query pointcnn._data.classes to get the class values on which the model is trained on. If remap_classes is specified, the new mapped values will be used for classification. Default value is [].
preserve_classes	Optional list of integers. A list of classes from the input data, that should be preserved in the predicted output. If a point in the input data belongs to any of the classes mentioned in this list, its class-code won’t be updated with the model’s predicted class. Example: If preserve_classes=[2,6]. The class-code of a point won’t be updated with the predicted class, if it’s 2 or 6. Default: [].

Returns

Path where files are dumped.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

show_results(rows=2, **kwargs)

Displays the results from your model on the validation set with ground truth on the left and predictions on the right.

Argument	Description
rows	Optional rows. Number of rows to show. Default value is 2 and maximum value is the batch_size passed in prepare_data.

kwargs

Argument	Description
color_mapping	Optional dictionary. Mapping from class value to RGB values. Default value example: {0:[220,220,220], 2:[255,0,0], 6:[0,255,0]}.
mask_class	Optional list of integers. Array containing class values to mask. Use this parameter to display the classes of interest. Default value is []. Example: All the classes are in [0, 1, 2] to display only class 0 set the mask class parameter to be [1, 2]. List of all classes can be accessed from data.classes attribute where data is the Databunch object returned by prepare_data function.
width	Optional integer. Width of the plot. Default value is 750.
height	Optional integer. Height of the plot. Default value is 512.
max_display_point	Optional integer. Maximum number of points to display. Default is 20000. A warning will be raised if the total points to display exceeds this parameter. Setting this parameter will randomly sample the specified number of points and once set, it will be used for future uses.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning. Not implemented for PointCNN as none of the layers are frozen by default.

Transform3d

class arcgis.learn.Transform3d(rotation_range=[0.04363323129985824, 3.141592653589793, 0.04363323129985824, 'u'], scaling_range=[0.05, 0.05, 0.05, 'g'], jitter=0.0)

Creates a 3D transformation that can be used in prepare_data to apply data augmentation to blocks, with a 50 % probability.

Argument	Description
rotation_range	Optional tuple of length 4. It contains a list of angles(in radians) for X, Z and Y coordinates respectively. These angles will rotate the point cloud block according to the randomly selected angle. The fourth value in the tuple is the sampling method where ‘u’ means uniform and ‘g’ means gaussian. Intrinsic rotation will take place. Default: [math.pi / 72, math.pi, math.pi / 72, ‘u’].
scaling_range	Optional tuple of length 4. It contains a list of scaling ranges[0-1] which will scale the points. Please keep it a very small number otherwise, point cloud block may get distorted. The fourth value in the tuple is the sampling method where ‘u’ means uniform and ‘g’ means gaussian. Default: [0.05, 0.05, 0.05, ‘g’].
jitter	Optional float. The scale to which randomly jitter the points in the point cloud block. Default: 0.0.

Returns

Transform3d object

Scanned Maps

ScannedMapDigitizer

class arcgis.learn.ScannedMapDigitizer(input_folder, output_folder)

Creates the object for ScannedMapDigitizer class

Argument	Description
input_folder	Path to the folder that contains extracted maps
output_folder	Path to the folder where intermediate results should get generated

classmethod create_mask(color_list, color_delta=60, kernel_size=None, kernel_type='rect', show_result=True)

Generates the binary masked images

Argument	Description
color_list	A list containing different color inputs (r, g, b).
color_delta	A value which defines the range around the threshold value for a specific color used for creating the mask images. Default value is 60
kernel_size	A list of 2 integers corresponding to size of the morphological filter operations closing and opening respectively.
kernel_type	A string value defining the type/shape of the kernel. kernel type can be “rect”, “elliptical” or “cross”. Default value is “rect”.
show_result	A boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod create_template_image(color, color_delta=10, kernel_size=2, show_result=True)

This method generates templates and color masks from scanned maps which are used in the subsequent step of template matching.

Argument	Description
color	r, g, b value representing land color. The color parameter is required for extracting the land region and generating the binary mask
color_delta	A value which defines the range around the threshold value for a specific color used for creating the mask images. Default value is 60
kernel_size	A list of 2 integers corresponding to size of the morphological filter operations closing and opening respectively.
show_result	A Boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod digitize_image(show_result=True)

This method is the final step in the pipeline that maps the species regions on the search image using the computed transformations. Also, it generates the shapefiles for the species region that can be visualized using ArcGIS Pro and further edited.

Argument	Description
show_result	A Boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod georeference_image(padding_param, show_result=True)

This method estimates the control point pairs by traversing the contours of template image and finding the corresponding matches on the search region ROI image

Argument	Description
padding_param	A tuple that contains x-padding and y-padding at 0th and 1st index respectively
show_result	A Boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod get_search_region_extent()

Getter function for search region extent

classmethod match_template_multiscale(min_scale, max_scale, num_scales, show_result=True)

This method finds the location of the best match of a smaller image (template) in a larger image(search image) assuming it exists in the larger image.

Argument	Description
min_scale	An integer representing the minimum scale at which template matching is performed
max_scale	An integer representing maximum scale at which template matching is performed
num_scales	An integer representing the number of scales at which template matching is performed.
show_result	A Boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod prepare_search_region(search_image, color, extent, image_height, image_width, show_result=True)

This method prepares the search region in which the prepared templates are to be searched.

Argument	Description
color	r, g, b value representing water color
search_image	Path to the bigger image/shapefile.
extent	Extent defines the extreme longitude/latitude of the search region.
image_height	Height of the search region.
image_width	Width of the search region.
show_result	A boolean value. Set to “True” to visualize results and set to “False” otherwise

classmethod set_search_region_extent(extent)

Creates the object for ScannedMapDigitizer class

Argument	Description
extent	Extent defines the extreme longitude/latitude of the search region.

Tabular and Feature Data Models

FullyConnectedNetwork

class arcgis.learn.FullyConnectedNetwork(data, layers=None, emb_szs=None, **kwargs)

Creates a FullyConnectedNetwork Object. Based on the Fast.ai’s Tabular Learner

Argument	Description
data	Required TabularDataObject. Returned data object from prepare_tabulardata function.
layers	Optional list, specifying the number of nodes in each layer. Default: [500, 100] is used. 2 layers each with nodes 500 and 100 respectively.
emb_szs	Optional dict, variable name with embedding size for categorical variables. If not specified, then calculated using fastai.

Returns

FullyConnectedNetwork Object

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a FullyConnectedNetwork Object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_tabulardata function or None for inferencing.

Returns

FullyConnectedNetwork Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(input_features=None, explanatory_rasters=None, datefield=None, distance_features=None, output_layer_name='Prediction Layer', gis=None, prediction_type='features', output_raster_path=None, match_field_names=None)

Predict on data from feature layer, dataframe and or raster data.

Argument	Description
input_features	Optional Feature Layer or spatially enabled dataframe. Required if prediction_type=’features’. Contains features with location and some or all fields required to infer the dependent variable value.
explanatory_rasters	Optional list of Raster Objects. If prediction_type=’raster’, must contain all rasters required to make predictions.
datefield	Optional string. Field name from feature layer that contains the date, time for the input features. Same as prepare_tabulardata().
distance_features	Optional List of Feature Layer objects. These layers are used for calculation of field “NEAR_DIST_1”, “NEAR_DIST_2” etc in the output dataframe. These fields contain the nearest feature distance from the input_features. Same as prepare_tabulardata().
output_layer_name	Optional string. Used for publishing the output layer.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
prediction_type	Optional String. Set ‘features’ or ‘dataframe’ to make output feature layer predictions. With this feature_layer argument is required. Set ‘raster’, to make prediction raster. With this rasters must be specified.
output_raster_path	Optional path. Required when prediction_type=’raster’, saves the output raster to this path.
match_field_names	Optional dictionary. Specify mapping of field names from prediction set to training set. For example: { “Field_Name_1”: “Field_1”, “Field_Name_2”: “Field_2” }

:returns Feature Layer if prediction_type=’features’, dataframe for prediction_type=’dataframe’ else creates an output raster.

save(name_or_path, framework='PyTorch', publish=False, gis=None, save_optimizer=False, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Folder path to save the model.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

score()

:returns R2 score for regression model and Accuracy for classification model.

show_results(rows=5)

Prints the rows of the dataframe with target and prediction columns.

Argument	Description
rows	Optional Integer. Number of rows to print.

Returns

dataframe

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

MLModel

class arcgis.learn.MLModel(data, model_type, **kwargs)

Creates a machine learning model based on its implementation from scikit-learn. For supervised learning: Refer https://scikit-learn.org/stable/supervised_learning.html#supervised-learning For unsupervised learning: 1. Clustering Models 2. Gaussian Mixture Models 3. Novelty and outlier detection Refer https://scikit-learn.org/stable/unsupervised_learning.html

Argument	Description
data	Required TabularDataObject. Returned data object from prepare_tabulardata function.
model_type	Required string path to the module. For example for SVM: sklearn.svm.SVR or sklearn.svm.SVC For tree: sklearn.tree.DecisionTreeRegressor or sklearn.tree.DecisionTreeClassifier
**kwargs	model_type specific arguments. Refer Parameters section https://scikit-learn.org/stable/supervised_learning.html#supervised-learning

Returns

MLModel Object

decision_function()

:returns output from scikit-learn’s model.decision_function()

property feature_importances_

:returns output from scikit-learn’s model.feature_importances_

fit()

classmethod from_model(emd_path, data=None)

Creates a MLModel Object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Esri Model Definition file.
data	Required TabularDataObject or None. Returned data object from prepare_tabulardata function or None for inferencing.

Returns

MLModel Object

kneighbors(X=None, n_neighbors=None, return_distance=True)

:returns output from scikit-learn’s model.kneighbors()

mahalanobis()

:returns output from scikit-learn’s model.mahalanobis()

predict(input_features=None, explanatory_rasters=None, datefield=None, distance_features=None, output_layer_name='Prediction Layer', gis=None, prediction_type='features', output_raster_path=None, match_field_names=None)

Predict on data from feature layer, dataframe and or raster data.

Argument	Description
input_features	Optional Feature Layer or spatial dataframe. Required if prediction_type=’features’. Contains features with location and some or all fields required to infer the dependent variable value.
explanatory_rasters	Optional list. Required if prediction_type=’raster’. Contains a list of raster objects containing some or all fields required to infer the dependent variable value.
datefield	Optional string. Field name from feature layer that contains the date, time for the input features. Same as prepare_tabulardata().
distance_features	Optional List of Feature Layer objects. These layers are used for calculation of field “NEAR_DIST_1”, “NEAR_DIST_2” etc in the output dataframe. These fields contain the nearest feature distance from the input_features. Same as prepare_tabulardata().
output_layer_name	Optional string. Used for publishing the output layer.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
prediction_type	Optional String. Set ‘features’ or ‘dataframe’ to make output feature layer predictions. With this feature_layer argument is required. Set ‘raster’, to make prediction raster. With this rasters must be specified.
output_raster_path	Optional path. Required when prediction_type=’raster’, saves the output raster to this path.
match_field_names	Optional dictionary. Specify mapping of field names from prediction set to training set. For example: { “Field_Name_1”: “Field_1”, “Field_Name_2”: “Field_2” }

:returns Feature Layer if prediction_type=’features’, dataframe for prediction_type=’dataframe’ else creates an output raster.

predict_proba()

:returns output from scikit-learn’s model.predict_proba()

save(name_or_path)

Saves the model, creates an Esri Model Definition. Uses pickle to save the model. Using protocol level 2. Protocol level is backward compatible.

:returns dataframe

score()

:returns output from scikit-learn’s model.score(), R2 score in case of regression and Accuracy in case of classification. For KMeans returns Opposite of the value of X on the K-means objective.

show_results(rows=5)

Shows sample results for the model.

:returns dataframe

TimeSeriesModel

class arcgis.learn.TimeSeriesModel(data, seq_len, model_arch='InceptionTime', **kwargs)

Creates a TimeSeriesModel Object. Based on the Fast.ai’s https://github.com/timeseriesAI/timeseriesAI

Argument	Description
data	Required TabularDataObject. Returned data object from prepare_tabulardata function.
seq_len	Required Integer. Sequence Length for the series. In case of raster only, seq_len = number of rasters, any other passed value will be ignored.
model_arch	Optional string. Model Architecture. Allowed “InceptionTime”, “ResCNN”, “Resnet”, “FCN”
**kwargs	Optional kwargs.

Returns

TimeSeriesModel Object

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a TimeSeriesModel Object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_tabulardata function or None for inferencing.

Returns

TimeSeriesModel Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

predict(input_features=None, explanatory_rasters=None, datefield=None, distance_features=None, output_layer_name='Prediction Layer', gis=None, prediction_type='features', output_raster_path=None, match_field_names=None, number_of_predictions=None)

Predict on data from feature layer and or raster data.

Argument	Description
input_features	Optional Feature Layer or spatially enabled dataframe. Contains features with location of the input data. Required if prediction_type is ‘features’ or ‘dataframe’
explanatory_rasters	Optional list of Raster Objects. Required if prediction_type is ‘rasters’
datefield	Optional field_name. This field contains the date in the input_features. The field type can be a string or date time field. If specified, the field will be split into Year, month, week, day, dayofweek, dayofyear, is_month_end, is_month_start, is_quarter_end, is_quarter_start, is_year_end, is_year_start, hour, minute, second, elapsed and these will be added to the prepared data as columns. All fields other than elapsed and dayofyear are treated as categorical.
distance_features	Optional List of Feature Layer objects. These layers are used for calculation of field “NEAR_DIST_1”, “NEAR_DIST_2” etc in the output dataframe. These fields contain the nearest feature distance from the input_features. Same as prepare_tabulardata().
output_layer_name	Optional string. Used for publishing the output layer.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
prediction_type	Optional String. Set ‘features’ or ‘dataframe’ to make output predictions.
output_raster_path	Optional path. Required when prediction_type=’raster’, saves the output raster to this path.
match_field_names	Optional string. Specify mapping of the original training set with prediction set.
number_of_predictions	Optional int for univariate time series. Specify the number of predictions to make, adds new rows to the dataframe. For multivariate or if None, it expects the dataframe to have empty rows. For prediction_type=’raster’, a new raster is created.

:returns Feature Layer/dataframe if prediction_type=’features’/’dataframe’, else returns True and saves output raster at the specified path.

save(name_or_path, framework='PyTorch', publish=False, gis=None, save_optimizer=False, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Folder path to save the model.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

score()

:returns R2 score for regression model and Accuracy for classification model.

show_results(rows=5)

Prints the graph with predictions.

Argument	Description
rows	Optional Integer. Number of rows to print.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

Unstructured Text Models

arcgis.learn.text module

• EntityRecognizer
• TextClassifier
• SequenceToSequence
• Inference Only Models
  • FillMask
  • QuestionAnswering
  • TextGenerator
  • TextSummarizer
  • TextTranslator
  • ZeroShotClassifier

Inferencing Methods (Image Server)

detect_objects

arcgis.learn.detect_objects(input_raster, model, model_arguments=None, output_name=None, run_nms=False, confidence_score_field=None, class_value_field=None, max_overlap_ratio=0, context=None, process_all_raster_items=False, *, gis=None, future=False, **kwargs)

Function can be used to generate feature service that contains polygons on detected objects found in the imagery data using the designated deep learning model. Note that the deep learning library needs to be installed separately, in addition to the server’s built in Python 3.x library.

Argument	Description
input_raster	Required. raster layer that contains objects that needs to be detected.
model	Required model object.
model_arguments	Optional dictionary. Name-value pairs of arguments and their values that can be customized by the clients. eg: {“name1”:”value1”, “name2”: “value2”}
output_name	Optional. If not provided, a Feature layer is created by the method and used as the output . You can pass in an existing Feature Service Item from your GIS to use that instead. Alternatively, you can pass in the name of the output Feature Service that should be created by this method to be used as the output for the tool. A RuntimeError is raised if a service by that name already exists
run_nms	Optional bool. Default value is False. If set to True, runs the Non Maximum Suppression tool.
confidence_score_field	Optional string. The field in the feature class that contains the confidence scores as output by the object detection method. This parameter is required when you set the run_nms to True
class_value_field	Optional string. The class value field in the input feature class. If not specified, the function will use the standard class value fields Classvalue and Value. If these fields do not exist, all features will be treated as the same object class. Set only if run_nms is set to True
max_overlap_ratio	Optional integer. The maximum overlap ratio for two overlapping features. Defined as the ratio of intersection area over union area. Set only if run_nms is set to True
context	Optional dictionary. Context contains additional settings that affect task execution. Dictionary can contain value for following keys: cellSize - Set the output raster cell size, or resolution extent - Sets the processing extent used by the function parallelProcessingFactor - Sets the parallel processing factor. Default is “80%” processorType - Sets the processor type. “CPU” or “GPU” Eg: {“processorType” : “CPU”} Setting context parameter will override the values set using arcgis.env variable for this particular function.
process_all_raster_items	Optional bool. Specifies how all raster items in an image service will be processed. False : all raster items in the image service will be mosaicked together and processed. This is the default. True : all raster items in the image service will be processed as separate images.
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

The output feature layer item containing the detected objects

classify_objects

arcgis.learn.classify_objects(input_raster, model, model_arguments=None, input_features=None, class_label_field=None, process_all_raster_items=False, output_name=None, context=None, *, gis=None, future=False, **kwargs)

Function can be used to output feature service with assigned class label for each feature based on information from overlapped imagery data using the designated deep learning model.

Argument	Description
input_raster	Required. raster layer that contains objects that needs to be classified.
model	Required model object.
model_arguments	Optional dictionary. Name-value pairs of arguments and their values that can be customized by the clients. eg: {“name1”:”value1”, “name2”: “value2”}
input_features	Optional feature layer. The point, line, or polygon input feature layer that identifies the location of each object to be classified and labelled. Each row in the input feature layer represents a single object. If no input feature layer is specified, the function assumes that each input image contains a single object to be classified. If the input image or images use a spatial reference, the output from the function is a feature layer, where the extent of each image is used as the bounding geometry for each labelled feature layer. If the input image or images are not spatially referenced, the output from the function is a table containing the image ID values and the class labels for each image.
class_label_field	Optional str. The name of the field that will contain the classification label in the output feature layer. If no field name is specified, a new field called ClassLabel will be generated in the output feature layer. Example: “ClassLabel”
process_all_raster_items	Optional bool. If set to False, all raster items in the image service will be mosaicked together and processed. This is the default. If set to True, all raster items in the image service will be processed as separate images.
output_name	Optional. If not provided, a Feature layer is created by the method and used as the output . You can pass in an existing Feature Service Item from your GIS to use that instead. Alternatively, you can pass in the name of the output Feature Service that should be created by this method to be used as the output for the tool. A RuntimeError is raised if a service by that name already exists
context	Optional dictionary. Context contains additional settings that affect task execution. Dictionary can contain value for following keys: cellSize - Set the output raster cell size, or resolution extent - Sets the processing extent used by the function parallelProcessingFactor - Sets the parallel processing factor. Default is “80%” processorType - Sets the processor type. “CPU” or “GPU” Eg: {“processorType” : “CPU”} Setting context parameter will override the values set using arcgis.env variable for this particular function.
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.

Returns

The output feature layer item containing the classified objects

classify_pixels

arcgis.learn.classify_pixels(input_raster, model, model_arguments=None, output_name=None, context=None, process_all_raster_items=False, *, gis=None, future=False, **kwargs)

Function to classify input imagery data using a deep learning model. Note that the deep learning library needs to be installed separately, in addition to the server’s built in Python 3.x library.

Argument	Description
input_raster	Required. raster layer that needs to be classified.
model	Required model object.
model_arguments	Optional dictionary. Name-value pairs of arguments and their values that can be customized by the clients. eg: {“name1”:”value1”, “name2”: “value2”}
output_name	Optional. If not provided, an imagery layer is created by the method and used as the output . You can pass in an existing Image Service Item from your GIS to use that instead. Alternatively, you can pass in the name of the output Image Service that should be created by this method to be used as the output for the tool. A RuntimeError is raised if a service by that name already exists
context	Optional dictionary. Context contains additional settings that affect task execution. Dictionary can contain value for following keys: outSR - (Output Spatial Reference) Saves the result in the specified spatial reference snapRaster - Function will adjust the extent of output rasters so that they match the cell alignment of the specified snap raster. cellSize - Set the output raster cell size, or resolution extent - Sets the processing extent used by the function parallelProcessingFactor - Sets the parallel processing factor. Default is “80%” processorType - Sets the processor type. “CPU” or “GPU” Eg: {“outSR” : {spatial reference}} Setting context parameter will override the values set using arcgis.env variable for this particular function.
process_all_raster_items	Optional bool. Specifies how all raster items in an image service will be processed. False : all raster items in the image service will be mosaicked together and processed. This is the default. True : all raster items in the image service will be processed as separate images.
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.
tiles_only	Keyword only parameter. Optional boolean. On AGOL, the default output image service for this function would be a Tiled Imagery Layer. To create Dynamic Imagery Layer as output on AGOL, set tiles_only parameter to False. Function will not honor tiles_only parameter on enterprise and will generate Dynamic Imagery Layer by default.

Returns

The classified imagery layer item

compute_accuracy_for_object_detection

arcgis.learn.compute_accuracy_for_object_detection(detected_features, ground_truth_features, detected_class_value_field=None, ground_truth_class_value_field=None, min_iou=None, mask_features=None, out_accuracy_table_name=None, out_accuracy_report_name=None, context=None, *, gis=None, future=False, **kwargs)

Function can be used to calculate the accuracy of a deep learning model by comparing the detected objects from the detect_objects function to ground truth data. Function available in ArcGIS Image Server 10.9 and higher.

Argument	Description
detected_features	Required. The input polygon feature layer containing the objects detected from the detect_objects function.
ground_truth_features	Required. The polygon feature layer containing ground truth data.
detected_class_value_field	Optional dictionary. The field in the detected objects feature class that contains the class names or class values. If a field name is not specified, a Classvalue or Value field will be used. If these fields do not exist, all records will be identified as belonging to one class. The class values or class names must match those in the ground truth feature class exactly. Syntax: A string describing the detected class value field. Example: “class”
ground_truth_class_value_field	The field in the ground truth feature class that contains the class names or class values. If a field name is not specified, a Classvalue or Value field will be used. If these fields do not exist, all records will be identified as belonging to one class. The class values or class names must match those in the detected objects feature class exactly. Example: “class”
min_iou	The Intersection over Union (IoU) ratio to use as a threshold to evaluate the accuracy of the object-detection model. The numerator is the area of overlap between the predicted bounding box and the ground truth bounding box. The denominator is the area of union or the area encompassed by both bounding boxes. min_IoU value should be in the range 0 to 1. [0,1] Example: 0.5
mask_features	Optional feature layer. A polygon feature service layer that delineates the area where accuracy will be computed. Only the image area that falls completely within the polygons will be assessed for accuracy.
out_accuracy_table_name	Optional. Name of the output accuracy table item to be created. If not provided, a random name is generated by the method and used as the output name.
out_accuracy_report_name	Optional. Accuracy report can either be added as an item to the portal. or can be written to a datastore. To add as an item, specify the name of the output report item (pdf item) to be created. Example: “accuracyReport” In order to write accuracy report to datastore, specify the datastore path as value to uri key. Example - “/fileShares/yourFileShareFolderName/accuracyReport”
context	Optional dictionary. Context contains additional settings that affect task execution. Dictionary can contain value for following keys: cellSize - Set the output raster cell size, or resolution extent - Sets the processing extent used by the function parallelProcessingFactor - Sets the parallel processing factor. Default is “80%” processorType - Sets the processor type. “CPU” or “GPU” Eg: {“processorType” : “CPU”} Setting context parameter will override the values set using arcgis.env variable for this particular function.
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.

Returns

The output accuracy table item or/and accuracy report item (or datastore path to accuracy report)

# Usage Example: This example generates an accuracy table for a specified minimum IoU value.

compute_accuracy_op = compute_accuracy_for_object_detection(detected_features=detected_features, 
                                                            ground_truth_features=ground_truth_features, 
                                                            detected_class_value_field="ClassValue", 
                                                            ground_truth_class_value_field="Class", 
                                                            min_iou=0.5, 
                                                            mask_features=None,
                                                            out_accuracy_table_name="accuracy_table", 
                                                            out_accuracy_report_name="accuracy_report", 
                                                            gis=gis)

Model Management

Model

class arcgis.learn.Model(model=None)

from_json(model)

Function is used to initialise Model object from model definition JSON

eg usage:

model = Model()

model.from_json({“Framework” :”TensorFlow”,

“ModelConfiguration”:”DeepLab”, “InferenceFunction”:”[functions]System\DeepLearning\ImageClassifier.py”, “ModelFile”:”\\folder_path_of_pb_file\frozen_inference_graph.pb”, “ExtractBands”:[0,1,2], “ImageWidth”:513, “ImageHeight”:513, “Classes”: [ { “Value”:0, “Name”:”Evergreen Forest”, “Color”:[0, 51, 0] },

{ “Value”:1, “Name”:”Grassland/Herbaceous”, “Color”:[241, 185, 137] }, { “Value”:2, “Name”:”Bare Land”, “Color”:[236, 236, 0] }, { “Value”:3, “Name”:”Open Water”, “Color”:[0, 0, 117] }, { “Value”:4, “Name”:”Scrub/Shrub”, “Color”:[102, 102, 0] }, { “Value”:5, “Name”:”Impervious Surface”, “Color”:[236, 236, 236] } ] })

from_model_path(model)

Function is used to initialise Model object from url of model package or path of model definition file eg usage:

model = Model()

model.from_model_path(“https://xxxportal.esri.com/sharing/rest/content/items/<itemId>”)

or model = Model()

model.from_model_path("\\sharedstorage\sharefolder\findtrees.emd")

install(*, gis=None, future=False, **kwargs)

Function is used to install the uploaded model package (*.dlpk). Optionally after inferencing the necessary information using the model, the model can be uninstalled by uninstall_model()

Argument	Description
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

Path where model is installed

query_info(*, gis=None, future=False, **kwargs)

Function is used to extract the deep learning model specific settings from the model package item or model definition file.

Argument	Description
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

The key model information in dictionary format that describes what the settings are essential for this type of deep learning model.

uninstall(*, gis=None, future=False, **kwargs)

Function is used to uninstall the uploaded model package that was installed using the install_model() This function will delete the named deep learning model from the server but not the portal item.

Argument	Description
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

itemId of the uninstalled model package item

ModelExtension

class arcgis.learn.ModelExtension(data, model_conf, backbone=None, pretrained_path=None, **kwargs)

Creates a ModelExtension object, to train the model for object detection, semantic segmentation, and edge detection.

Argument	Description
data	Required fastai Databunch. Returned data object from prepare_data function.
model_conf	A class definition contains the following methods: get_model(self, data, backbone=None): for model definition, on_batch_begin(self, learn, model_input_batch, model_target_batch): for feeding input to the model during training, transform_input(self, xb): for feeding input to the model during inferencing/validation, transform_input_multispectral(self, xb): for feeding input to the model during inferencing/validation in case of multispectral data, loss(self, model_output, *model_target): to return loss value of the model, and post_process(self, pred, nms_overlap, thres, chip_size, device): to post-process the output of the object-detection model. post_process(self, pred, thres): to post-process the output of the segmentation model.
backbone	Optional function. If custom model requires any backbone.
pretrained_path	Optional string. Path where pre-trained model is saved.

Returns

ModelExtension Object

fit(epochs=10, lr=None, one_cycle=True, early_stopping=False, checkpoint=True, tensorboard=False, **kwargs)

Train the model for the specified number of epochs and using the specified learning rates

Argument	Description
epochs	Required integer. Number of cycles of training on the data. Increase it if underfitting.
lr	Optional float or slice of floats. Learning rate to be used for training the model. If lr=None, an optimal learning rate is automatically deduced for training the model.
one_cycle	Optional boolean. Parameter to select 1cycle learning rate schedule. If set to False no learning rate schedule is used.
early_stopping	Optional boolean. Parameter to add early stopping. If set to ‘True’ training will stop if validation loss stops improving for 5 epochs.
checkpoint	Optional boolean. Parameter to save the best model during training. If set to True the best model based on validation loss will be saved during training.
tensorboard	Optional boolean. Parameter to write the training log. If set to ‘True’ the log will be saved at <dataset-path>/training_log which can be visualized in tensorboard. Required tensorboardx version=2.1 The default value is ‘False’. **Note - Not applicable for Text Models

classmethod from_model(emd_path, data=None)

Creates a ModelExtension object from an Esri Model Definition (EMD) file.

Argument	Description
emd_path	Required string. Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.
data	Required fastai Databunch or None. Returned data object from prepare_data function or None for inferencing.

Returns

ModelExtension Object

load(name_or_path)

Loads a compatible saved model for inferencing or fine tuning from the disk.

Argument	Description
name_or_path	Required string. Name or Path to Deep Learning Package (DLPK) or Esri Model Definition(EMD) file.

lr_find(allow_plot=True)

Runs the Learning Rate Finder, and displays the graph of its output. Helps in choosing the optimum learning rate for training the model.

plot_losses()

Plot validation and training losses after fitting the model.

save(name_or_path, framework='PyTorch', publish=False, gis=None, compute_metrics=True, save_optimizer=False, save_inference_file=True, **kwargs)

Saves the model weights, creates an Esri Model Definition and Deep Learning Package zip for deployment to Image Server or ArcGIS Pro.

Argument	Description
name_or_path	Required string. Name of the model to save. It stores it at the pre-defined location. If path is passed then it stores at the specified path with model name as directory name and creates all the intermediate directories.
framework	Optional string. Defines the framework of the model. (Only supported by SingleShotDetector, currently.) If framework used is TF-ONNX, batch_size can be passed as an optional keyword argument. Framework choice: ‘PyTorch’ and ‘TF-ONNX’
publish	Optional boolean. Publishes the DLPK as an item.
gis	Optional GIS Object. Used for publishing the item. If not specified then active gis user is taken.
compute_metrics	Optional boolean. Used for computing model metrics.
save_optimizer	Optional boolean. Used for saving the model-optimizer state along with the model. Default is set to False
save_inference_file	Optional boolean. Used for saving the inference file along with the model. If False, the model will not work with ArcGIS Pro 2.6 or earlier. Default is set to True.
kwargs	Optional Parameters: Boolean overwrite if True, it will overwrite the item on ArcGIS Online/Enterprise, default False.

unfreeze()

Unfreezes the earlier layers of the model for fine-tuning.

list_models

arcgis.learn.list_models(*, gis=None, future=False, **kwargs)

Function is used to list all the installed deep learning models.

Argument	Description
gis	Optional GIS. The GIS on which this tool runs. If not specified, the active GIS is used.
future	Keyword only parameter. Optional boolean. If True, the result will be a GPJob object and results will be returned asynchronously.

Returns

list of deep learning models installed