arcgis.mapping module

The arcgis.mapping module provides components for visualizing GIS data and analysis. This module includes WebMap and WebScene components that enable 2D and 3D mapping and visualization in the GIS. This module also includes mapping layers like MapImageLayer and VectorTileLayer

WebMap

class arcgis.mapping.WebMap(webmapitem=None)

Bases: collections.OrderedDict

Represents a web map item and provides access to its basemaps and operational layers as well as functionality to visualize and interact with them. http://resources.arcgis.com/en/help/arcgis-web-map-json/index.html#/Web_map_format_overview/02qt00000007000000/

add_layer(layer, options=None)

Adds the given layer to the WebMap.

Argument	Description
layer	Required object. You can add any Layer objects such as FeatureLayer, MapImageLayer, ImageryLayer etc. You can also add Item objects and FeatureSet and FeatureCollections.
options	Optional dict. Specify properties such as title, symbol, opacity, visibility, renderer for the layer that is added. If not specified, appropriate defaults are applied.

Returns

True if layer was successfully added. Else, raises appropriate exception.

property basemap

Base map layers in the web map :return: List of layer objects

property layers

Operational layers in the web map :return: List of Layer objects

property offline_areas

Resource manager for offline areas cached for the web map :return:

remove_layer(layer)

Removes the specified layer from the web map. You can get the list of layers in map using the ‘layers’ property and pass one of those layers to this method for removal form the map.

Argument	Description
layer	Required object. Pass the layer that needs to be removed from the map. You can get the list of layers in the map by calling the layers property.

save(item_properties, thumbnail=None, metadata=None, owner=None, folder=None)

Save the WebMap object into a new web map Item in your GIS.

Note

If you started out with a fresh WebMap object, use this method to save it as a the web map item in your GIS.

If you started with a WebMap object from an existing web map item, calling this method will create a new item with your changes. If you want to update the existing web map item with your changes, call the update() method instead.

Argument	Description
item_properties	Required dictionary. See table below for the keys and values.
thumbnail	Optional string. Either a path or URL to a thumbnail image.
metadata	Optional string. Either a path or URL to the metadata.
owner	Optional string. Defaults to the logged in user.
folder	Optional string. Name of the folder where placing item.

Key:Value Dictionary Options for Argument item_properties

Key	Value
typeKeywords	Optional string. Provide a lists all sub-types, see URL 1 below for valid values.
description	Optional string. Description of the item.
title	Optional string. Name label of the item.
tags	Optional string. Tags listed as comma-separated values, or a list of strings. Used for searches on items.
snippet	Optional string. Provide a short summary (limit to max 250 characters) of the what the item is.
accessInformation	Optional string. Information on the source of the content.
licenseInfo	Optional string. Any license information or restrictions regarding the content.
culture	Optional string. Locale, country and language information.
access	Optional string. Valid values are private, shared, org, or public.
commentsEnabled	Optional boolean. Default is true, controls whether comments are allowed (true) or not allowed (false).
culture	Optional string. Language and country information.

URL 1: http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#//02r3000000ms000000

Returns

Item object corresponding to the new web map Item created.

update(item_properties=None, thumbnail=None, metadata=None)

Updates the web map item in your GIS with the changes you made to the WebMap object. In addition, you can update other item properties, thumbnail and metadata.

Note

If you started with a WebMap object from an existing web map item, calling this method will update the item with your changes.

If you started out with a fresh WebMap object (without a web map item), calling this method will raise a RuntimeError exception. If you want to save the WebMap object into a new web map item, call the save() method instead.

For item_properties, pass in arguments for only the properties you want to be updated. All other properties will be untouched. For example, if you want to update only the item’s description, then only provide the description argument in item_properties.

Argument	Description
item_properties	Optional dictionary. See table below for the keys and values.
thumbnail	Optional string. Either a path or URL to a thumbnail image.
metadata	Optional string. Either a path or URL to the metadata.

Key:Value Dictionary Options for Argument item_properties

Key	Value
typeKeywords	Optional string. Provide a lists all sub-types, see URL 1 below for valid values.
description	Optional string. Description of the item.
title	Optional string. Name label of the item.
tags	Optional string. Tags listed as comma-separated values, or a list of strings. Used for searches on items.
snippet	Optional string. Provide a short summary (limit to max 250 characters) of the what the item is.
accessInformation	Optional string. Information on the source of the content.
licenseInfo	Optional string. Any license information or restrictions regarding the content.
culture	Optional string. Locale, country and language information.
access	Optional string. Valid values are private, shared, org, or public.
commentsEnabled	Optional boolean. Default is true, controls whether comments are allowed (true) or not allowed (false).

URL 1: http://resources.arcgis.com/en/help/arcgis-rest-api/index.html#//02r3000000ms000000

Returns

A boolean indicating success (True) or failure (False).

WebScene

class arcgis.mapping.WebScene(websceneitem)

Bases: collections.OrderedDict

Represents a web scene and provides access to its basemaps and operational layers as well as functionality to visualize and interact with them.

update([E, ]**F) → None. Update D from dict/iterable E and F.

If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]

MapImageLayer

class arcgis.mapping.MapImageLayer(url, gis=None)

Bases: arcgis.gis.Layer

MapImageLayer allows you to display and analyze data from sublayers defined in a map service, exporting images instead of features. Map service images are dynamically generated on the server based on a request, which includes an LOD (level of detail), a bounding box, dpi, spatial reference and other options. The exported image is of the entire map extent specified.

MapImageLayer does not display tiled images. To display tiled map service layers, see TileLayer.

create_dynamic_layer(layer)

A dynamic layer / table method represents a single layer / table of a map service published by ArcGIS Server or of a registered workspace. This resource is supported only when the map image layer supports dynamic layers, as indicated by supportsDynamicLayers on the map image layer properties.

Argument

Description

layer

required dict. Dynamic layer/table source definition. Syntax: { “id”: <layerOrTableId>, “source”: <layer source>, //required “definitionExpression”: “<definitionExpression>”, “drawingInfo”: { “renderer”: <renderer>, “transparency”: <transparency>, “scaleSymbols”: <true,false>, “showLabels”: <true,false>, “labelingInfo”: <labeling info> }, “layerTimeOptions”: //supported only for time enabled map layers { “useTime” : <true,false>, “timeDataCumulative” : <true,false>, “timeOffset” : <timeOffset>, “timeOffsetUnits” : “<esriTimeUnitsCenturies,esriTimeUnitsDays, esriTimeUnitsDecades,esriTimeUnitsHours, esriTimeUnitsMilliseconds,esriTimeUnitsMinutes, esriTimeUnitsMonths,esriTimeUnitsSeconds, esriTimeUnitsWeeks,esriTimeUnitsYears | esriTimeUnitsUnknown>” } }

Returns

arcgis.features.FeatureLayer or None (if not enabled)

estimate_export_tiles_size(export_by, levels, tile_package=False, export_extent='DEFAULTEXTENT', area_of_interest=None, asynchronous=True, **kwargs)

The estimate_export_tiles_size method is an asynchronous task that allows estimation of the size of the tile package or the cache data set that you download using the Export Tiles operation. This operation can also be used to estimate the tile count in a tile package and determine if it will exceced the maxExportTileCount limit set by the administrator of the service. The result of this operation is Map Service Job. This job response contains reference to Map Service Result resource that returns the total size of the cache to be exported (in bytes) and the number of tiles that will be exported.

Argument	Description
tile_package	optional boolean. Allows estimating the size for either a tile package or a cache raster data set. Specify the value true for tile packages format and false for Cache Raster data set. The default value is False
levels	required string. Specify the tiled service levels for which you want to get the estimates. The values should correspond to Level IDs, cache scales or the Resolution as specified in export_by parameter. The values can be comma separated values or a range. Example 1: 1,2,3,4,5,6,7,8,9 Example 2: 1-4,7-9
export_by	required string. The criteria that will be used to select the tile service levels to export. The values can be Level IDs, cache scales or the Resolution (in the case of image services). Values: LevelID, Resolution, Scale
export_extent	The extent (bounding box) of the tile package or the cache dataset to be exported. If extent does not include a spatial reference, the extent values are assumed to be in the spatial reference of the map. The default value is full extent of the tiled map service. Syntax: <xmin>, <ymin>, <xmax>, <ymax> Example: -104,35.6,-94.32,41
area_of_interest	optiona dictionary or Polygon. This allows exporting tiles within the specified polygon areas. This parameter supersedes extent parameter. Example: { “features”: [{“geometry”:{“rings”:[[[-100,35], [-100,45],[-90,45],[-90,35],[-100,35]]], “spatialReference”:{“wkid”:4326}}}]}
asynchronous	optional boolean. The estimate function is run asynchronously requiring the tool status to be checked manually to force it to run synchronously the tool will check the status until the estimation completes. The default is True, which means the status of the job and results need to be checked manually. If the value is set to False, the function will wait until the task completes.

Returns

dictionary

export_map(bbox, bbox_sr=None, size='600, 550', dpi=200, image_sr=None, image_format='png', layer_defs=None, layers=None, transparent=False, time_value=None, time_options=None, dynamic_layers=None, gdb_version=None, scale=None, rotation=None, transformation=None, map_range_values=None, layer_range_values=None, layer_parameter=None, f='json', save_folder=None, save_file=None, **kwargs)

The export operation is performed on a map service resource. The result of this operation is a map image resource. This resource provides information about the exported map image such as its URL, its width and height, extent and scale.

Returns

string, image of the map.

export_tiles(levels, export_by='LevelID', tile_package=False, export_extent='DEFAULT', optimize_for_size=True, compression=75, area_of_interest=None, asynchronous=False, **kwargs)

The exportTiles operation is performed as an asynchronous task and allows client applications to download map tiles from a server for offline use. This operation is performed on a Map Service that allows clients to export cache tiles. The result of this operation is Map Service Job. This job response contains a reference to the Map Service Result resource, which returns a URL to the resulting tile package (.tpk) or a cache raster dataset. exportTiles can be enabled in a service by using ArcGIS for Desktop or the ArcGIS Server Administrator Directory. In ArcGIS for Desktop make an admin or publisher connection to the server, go to service properties, and enable Allow Clients to Export Cache Tiles in the advanced caching page of the Service Editor. You can also specify the maximum tiles clients will be allowed to download. The default maximum allowed tile count is 100,000. To enable this capability using the Administrator Directory, edit the service, and set the properties exportTilesAllowed=true and maxExportTilesCount=100000.

At 10.2.2 and later versions, exportTiles is supported as an operation of the Map Server. The use of the http://Map Service/exportTiles/submitJob operation is deprecated. You can provide arguments to the exportTiles operation as defined in the following parameters table:

Argument	Description
levels	required string. Specifies the tiled service levels to export. The values should correspond to Level IDs, cache scales. or the resolution as specified in export_by parameter. The values can be comma separated values or a range. Make sure tiles are present at the levels where you attempt to export tiles. Example 1: 1,2,3,4,5,6,7,8,9 Example 2: 1-4,7-9
export_by	required string. The criteria that will be used to select the tile service levels to export. The values can be Level IDs, cache scales. or the resolution. The defaut is ‘LevelID’. Values: LevelID | Resolution | Scale
tile_package	optiona boolean. Allows exporting either a tile package or a cache raster data set. If the value is true, output will be in tile package format, and if the value is false, a cache raster data set is returned. The default value is false.
export_extent	optional dictionary or string. The extent (bounding box) of the tile package or the cache dataset to be exported. If extent does not include a spatial reference, the extent values are assumed to be in the spatial reference of the map. The default value is full extent of the tiled map service. Syntax: <xmin>, <ymin>, <xmax>, <ymax> Example 1: -104,35.6,-94.32,41 Example 2: {“xmin” : -109.55, “ymin” : 25.76, “xmax” : -86.39, “ymax” : 49.94, “spatialReference” : {“wkid” : 4326}}
optimize_for_size	optional boolean. Use this parameter to enable compression of JPEG tiles and reduce the size of the downloaded tile package or the cache raster data set. Compressing tiles slightly compromises the quality of tiles but helps reduce the size of the download. Try sample compressions to determine the optimal compression before using this feature. The default value is True.
compression=75,	optional integer. When optimize_for_size=true, you can specify a compression factor. The value must be between 0 and 100. The value cannot be greater than the default compression already set on the original tile. For example, if the default value is 75, the value of compressionQuality must be between 0 and 75. A value greater than 75 in this example will attempt to up sample an already compressed tile and will further degrade the quality of tiles.
area_of_interest	optional dictionary, Polygon. The area_of_interest polygon allows exporting tiles within the specified polygon areas. This parameter supersedes the exportExtent parameter. Example: { “features”: [{“geometry”:{“rings”:[[[-100,35], [-100,45],[-90,45],[-90,35],[-100,35]]], “spatialReference”:{“wkid”:4326}}}]}
asynchronous	optional boolean. Default False, this value ensures the returns are returned to the user instead of the user having the check the job status manually.

Returns

path to download file is asynchronous is False. If True, a dictionary is returned.

find(search_text, layers, contains=True, search_fields=None, sr=None, layer_defs=None, return_geometry=True, max_offset=None, precision=None, dynamic_layers=None, return_z=False, return_m=False, gdb_version=None, return_unformatted=False, return_field_name=False, transformations=None, map_range_values=None, layer_range_values=None, layer_parameters=None, **kwargs)

performs the map service find operation

Argument	Description
search_text	required string.The search string. This is the text that is searched across the layers and fields the user specifies.
layers	optional string. The layers to perform the identify operation on. There are three ways to specify which layers to identify on: top: Only the top-most layer at the specified location. visible: All visible layers at the specified location. all: All layers at the specified location.
contains	optional boolean. If false, the operation searches for an exact match of the search_text string. An exact match is case sensitive. Otherwise, it searches for a value that contains the search_text provided. This search is not case sensitive. The default is true.
search_fields	optional string. List of field names to look in.
sr	optional dict, string, or SpatialReference. The well-known ID of the spatial reference of the input and output geometries as well as the map_extent. If sr is not specified, the geometry and the map_extent are assumed to be in the spatial reference of the map, and the output geometries are also in the spatial reference of the map.
layer_defs	optional dict. Allows you to filter the features of individual layers in the exported map by specifying definition expressions for those layers. Definition expression for a layer that is published with the service will be always honored.
return_geometry	optional boolean. If true, the resultset will include the geometries associated with each result. The default is true.
max_offset	optional integer. This option can be used to specify the maximum allowable offset to be used for generalizing geometries returned by the identify operation.
precision	optional integer. This option can be used to specify the number of decimal places in the response geometries returned by the identify operation. This applies to X and Y values only (not m or z-values).
dynamic_layers	optional dict. Use dynamicLayers property to reorder layers and change the layer data source. dynamicLayers can also be used to add new layer that was not defined in the map used to create the map service. The new layer should have its source pointing to one of the registered workspaces that was defined at the time the map service was created. The order of dynamicLayers array defines the layer drawing order. The first element of the dynamicLayers is stacked on top of all other layers. When defining a dynamic layer, source is required.
return_z	optional boolean. If true, Z values will be included in the results if the features have Z values. Otherwise, Z values are not returned. The default is false.
return_m	optional boolean.If true, M values will be included in the results if the features have M values. Otherwise, M values are not returned. The default is false.
gdb_version	optional string. Switch map layers to point to an alternate geodatabase version.
return_unformatted	optional boolean. If true, the values in the result will not be formatted i.e. numbers will returned as is and dates will be returned as epoch values.
return_field_name	optional boolean. If true, field names will be returned instead of field aliases.
transformations	optional list. Use this parameter to apply one or more datum transformations to the map when sr is different than the map service’s spatial reference. It is an array of transformation elements.
map_range_values	optional list. Allows you to filter features in the exported map from all layer that are within the specified range instant or extent.
layer_range_values	optional dictionary. Allows you to filter features for each individual layer that are within the specified range instant or extent. Note: Check range infos at the layer resources for the available ranges.
layer_parameters	optional list. Allows you to filter the features of individual layers in the exported map by specifying value(s) to an array of pre-authored parameterized filters for those layers. When value is not specified for any parameter in a request, the default value, that is assigned during authoring time, gets used instead.

Returns

dictionary

classmethod fromitem(item)

Returns the layer at the specified index from a layer item.

Argument	Description
item	Required string. An item ID representing a layer.
index	Optional int. The index of the layer amongst the item’s layers

Returns

The layer at the specified index.

generate_kml(save_location, name, layers, options='composite')

The generateKml operation is performed on a map service resource. The result of this operation is a KML document wrapped in a KMZ file. The document contains a network link to the KML Service endpoint with properties and parameters you specify.

Argument	Description
save_location	required string. Save folder.
name	The name of the resulting KML document. This is the name that appears in the Places panel of Google Earth.
layers	required string. the layers to perform the generateKML operation on. The layers are specified as a comma-separated list of layer ids.
options	required string. The layer drawing options. Based on the option chosen, the layers are drawn as one composite image, as separate images, or as vectors. When the KML capability is enabled, the ArcGIS Server administrator has the option of setting the layer operations allowed. If vectors are not allowed, then the caller will not be able to get vectors. Instead, the caller receives a single composite image. values: composite, separateImage, nonComposite

Returns

string to file path

identify(geometry, map_extent, image_display, geometry_type='Point', sr=None, layer_defs=None, time_value=None, time_options=None, layers='all', tolerance=None, return_geometry=True, max_offset=None, precision=4, dynamic_layers=None, return_z=False, return_m=False, gdb_version=None, return_unformatted=False, return_field_name=False, transformations=None, map_range_values=None, layer_range_values=None, layer_parameters=None, **kwargs)

The identify operation is performed on a map service resource to discover features at a geographic location. The result of this operation is an identify results resource. Each identified result includes its name, layer ID, layer name, geometry and geometry type, and other attributes of that result as name-value pairs.

Returns

dictionary

property item_info

returns the service’s item’s infomation

property kml

returns the KML file for the layer

property legend

The legend resource represents a map service’s legend. It returns the legend information for all layers in the service. Each layer’s legend information includes the symbol images and labels for each symbol. Each symbol is an image of size 20 x 20 pixels at 96 DPI. Additional information for each layer such as the layer ID, name, and min and max scales are also included.

The legend symbols include the base64 encoded imageData as well as a url that could be used to retrieve the image from the server.

property manager

property metadata

returns the service’s XML metadata file

thumbnail(out_path=None)

if present, this operation will download the image to local disk

MapImageLayerManager

class arcgis.mapping.MapImageLayerManager(url, gis=None, map_img_lyr=None)

Bases: arcgis.gis._GISResource

allows administration (if access permits) of ArcGIS Online hosted map image layers. A map image layer offers access to map and layer content.

cancel_job(job_id)

The cancel job operation supports cancelling a job while update tiles is running from a hosted feature service. The result of this operation is a response indicating success or failure with error code and description.

Inputs:

job_id - job id to cancel

delete_tiles(levels, extent=None)

Deletes tiles for the current cache

Argument	Description
extent	optional dictionary, If specified, the tiles within this extent will be deleted or will be deleted based on the service’s full extent. Example: 6224324.092137296,487347.5253569535, 11473407.698535524,4239488.369818687 the minx, miny, maxx, maxy values or, {“xmin”:6224324.092137296,”ymin”:487347.5253569535, “xmax”:11473407.698535524,”ymax”:4239488.369818687, “spatialReference”:{“wkid”:102100}} the JSON representation of the Extent object.
levels	required string, The level to delete. Example, 0-5,10,11-20 or 1,2,3 or 0-5

Returns

dictionary

edit_tile_service(service_definition=None, min_scale=None, max_scale=None, source_item_id=None, export_tiles_allowed=False, max_export_tile_count=100000)

This operation updates a Tile Service’s properties

Inputs:

service_definition - updates a service definition min_scale - sets the services minimum scale for caching max_scale - sets the service’s maximum scale for caching source_item_id - The Source Item ID is the GeoWarehouse Item ID of the map service export_tiles_allowed - sets the value to let users export tiles max_export_tile_count - sets the maximum amount of tiles to be exported

from a single call.

job_statistics(job_id)

Returns the job statistics for the given jobId

refresh(service_definition=True)

The refresh operation refreshes a service, which clears the web server cache for the service.

property rerun_job

The rerun job operation supports re-running a canceled job from a hosted map service. The result of this operation is a response indicating success or failure with error code and description.

Argument	Description
code	required string, parameter used to re-run a given jobs with a specific error code: ALL | ERROR | CANCELED
job_id	required string, job to reprocess

Returns

boolean or dictionary

update_tiles(levels=None, extent=None)

The starts tile generation for ArcGIS Online. The levels of detail and the extent are provided to determine the area where tiles need to be rebuilt.

..Note: This operation is for ArcGIS Online only.

Argument	Description
levels	Optional string, The level of details to update example: “1,2,10,20”
extent	Optional string, the area to update as Xmin, YMin, XMax, YMax example: “-100,-50,200,500”

Returns

Dictionary. If the product is not ArcGIS Online tile service, the result will be None.

VectorTileLayer

class arcgis.mapping.VectorTileLayer(url, gis=None)

Bases: arcgis.gis.Layer

classmethod fromitem(item)

Returns the layer at the specified index from a layer item.

Argument	Description
item	Required string. An item ID representing a layer.
index	Optional int. The index of the layer amongst the item’s layers

Returns

The layer at the specified index.

property info

This returns relative paths to a list of resource files

property styles

tile_fonts(fontstack, stack_range)

This resource returns glyphs in PBF format. The template url for this fonts resource is represented in Vector Tile Style resource.

tile_sprite(out_format='sprite.json')

This resource returns sprite image and metadata

vector_tile(level, row, column)

This resource represents a single vector tile for the map. The bytes for the tile at the specified level, row and column are returned in PBF format. If a tile is not found, an error is returned.

export_map

mapping.export_map(format: str = 'PDF', layout_template: str = 'MAP_ONLY', gis=None)

This function takes the state of the web map(for example, included services, layer visibility settings, client-side graphics, and so forth) and returns either (a) a page layout or (b) a map without page surrounds of the specified area of interest in raster or vector format. The input for this function is a piece of text in JavaScript object notation (JSON) format describing the layers, graphics, and other settings in the web map. The JSON must be structured according to the WebMap specification in the ArcGIS HelpThis tool is shipped with ArcGIS Server to support web services for printing, including the preconfigured service named PrintingTools. Parameters:

web_map_as_json: Web Map as JSON (str). Required parameter. A JSON representation of the state of the map to be exported as it appears in the web application. See the WebMap specification in the ArcGIS Help to understand how this text should be formatted. The ArcGIS web APIs (for JavaScript, Flex, Silverlight, etc.) allow developers to easily get this JSON string from the map.

format: Format (str). Optional parameter. The format in which the map image for printing will be delivered. The following strings are accepted.For example:PNG8 (default if the parameter is left blank)PDFPNG32JPGGIFEPSSVGSVGZ

Choice list:[‘PDF’, ‘PNG32’, ‘PNG8’, ‘JPG’, ‘GIF’, ‘EPS’, ‘SVG’, ‘SVGZ’]

layout_template: Layout Template (str). Optional parameter. Either a name of a template from the list or the keyword MAP_ONLY. When MAP_ONLY is chosen or an empty string is passed in, the output map does not contain any page layout surroundings (for example title, legends, scale bar, and so forth)

Choice list:[‘A3 Landscape’, ‘A3 Portrait’, ‘A4 Landscape’, ‘A4 Portrait’, ‘Letter ANSI A Landscape’, ‘Letter ANSI A Portrait’, ‘Tabloid ANSI B Landscape’, ‘Tabloid ANSI B Portrait’, ‘MAP_ONLY’]

gis: Optional, the GIS on which this tool runs. If not specified, the active GIS is used.

Returns:

output_file - Output File as a DataFile

See https://utility.arcgisonline.com/arcgis/rest/directories/arcgisoutput/Utilities/PrintingTools_GPServer/Utilities_PrintingTools/ExportWebMapTask.htm for additional help.

get_layout_templates

mapping.get_layout_templates() → str

This function returns the content of the GIS’s layout templates formatted as dict.

Parameters:

gis: Optional, the GIS on which this tool runs. If not specified, the active GIS is used.

Returns:

output_json - layout templates as Python dict

See https://utility.arcgisonline.com/arcgis/rest/directories/arcgisoutput/Utilities/PrintingTools_GPServer/Utilities_PrintingTools/GetLayoutTemplatesInfo.htm for additional help.