arcgis.raster.functions module¶

Raster functions allow you to define processing operations that will be applied to one or more rasters. These functions are applied to the raster data on the fly as the data is accessed and viewed; therefore, they can be applied quickly without having to endure the time it would otherwise take to create a processed product on disk, for which raster analytics tools like arcgis.raster.analytics.generate_raster can be used.

Functions can be applied to various rasters (or images), including the following:

Imagery layers
Rasters within imagery layers

abs¶

functions.abs(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Abs operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

acos¶

functions.acos(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The acos operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

acosh¶

functions.acosh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The ACosH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

apply¶

functions.apply(fn_name, **kwargs)¶

Applies a server side raster function template defined by the imagery layer (image service) The name of the raster function template is available in the imagery layer properties.rasterFunctionInfos.

Function arguments are optional; argument names and default values are created by the author of the raster function template and are not known through the API. A client can simply provide the name of the raster function template only or, optionally, provide arguments to overwrite the default values. For more information about authoring server-side raster function templates, see <a href=”http://server.arcgis.com/en/server/latest/publish-services/windows/server-side-raster-functions.htm”>Server-side raster functions</a>.

Parameters

raster – the input raster, or imagery layer
fn_name – name of the server side raster function template, See imagery layer properties.rasterFunctionInfos
kwargs – keyword arguments to override the default values of the raster function template, including astype

Returns

the output raster

arg_max¶

functions.arg_max(undefined_class=None, astype=None)¶

In the ArgMax method, all raster bands from every input raster are assigned a 0-based incremental band index, which is first ordered by the input raster index, as shown in the table below, and then by the relative band order within each input raster.

See http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/argstatistics-function.htm

Parameters

rasters – the imagery layers filtered by where clause, spatial and temporal filters
undefined_class – int, required

Returns

the output raster with this function applied to it

arg_median¶

functions.arg_median(undefined_class=None, astype=None)¶

The ArgMedian method returns the Band index for which the given pixel attains the median value of values from all bands.

Consider values from all bands as an array. After sorting the array in ascending order, the median is the one value separating the lower half of the array from the higher half. More specifically, if the ascend-sorted array has n values, the median is the ith (0-based) value, where: i = ( (n-1) / 2 )

See http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/argstatistics-function.htm

Parameters

rasters – the imagery layers filtered by where clause, spatial and temporal filters
undefined_class – int, required

Returns

the output raster with this function applied to it

arg_min¶

functions.arg_min(undefined_class=None, astype=None)¶

ArgMin is the argument of the minimum, which returns the Band index for which the given pixel attains its minimum value.

See http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/argstatistics-function.htm

Parameters

rasters – the imagery layers filtered by where clause, spatial and temporal filters
undefined_class – int, required

Returns

the output raster with this function applied to it

arg_statistics¶

functions.arg_statistics(stat_type=None, min_value=None, max_value=None, undefined_class=None, astype=None)¶

The arg_statistics function produces an output with a pixel value that represents a statistical metric from all bands of input rasters. The statistics can be the band index of the maximum, minimum, or median value, or the duration (number of bands) between a minimum and maximum value

See http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/argstatistics-function.htm

Parameters

rasters – the imagery layers filtered by where clause, spatial and temporal filters
stat_type – one of “max”, “min”, “median”, “duration”
min_value – double, required if the type is duration
max_value – double, required if the type is duration
undefined_class – int, required if the type is maximum or minimum

Returns

the output raster with this function applied to it

arithmetic¶

functions.arithmetic(raster2, extent_type='FirstOf', cellsize_type='FirstOf', astype=None, operation_type=1)¶

The Arithmetic function performs an arithmetic operation between two rasters or a raster and a scalar, and vice versa.

Parameters

raster1 – the first raster- imagery layers filtered by where clause, spatial and temporal filters
raster2 – the 2nd raster - imagery layers filtered by where clause, spatial and temporal filters
extent_type – one of “FirstOf”, “IntersectionOf” “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf “MeanOf”, “LastOf”
operation_type – int 1 = Plus, 2 = Minus, 3 = Multiply, 4=Divide, 5=Power, 6=Mode

Returns

the output raster with this function applied to it

asin¶

functions.asin(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The asin operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

asinh¶

functions.asinh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The ASinH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

aspect¶

functions.aspect()¶

aspect identifies the downslope direction of the maximum rate of change in value from each cell to its neighbors. Aspect can be thought of as the slope direction. The values of the output raster will be the compass direction of the aspect. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/aspect-function.htm”>Aspect function</a> and <a href=”http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/how-aspect-works.htm”>How Aspect works</a>.

Parameters: raster – the input raster / imagery layer
Returns: aspect applied to the input raster

atan¶

functions.atan(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The ATan operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

atan2¶

functions.atan2(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The ATan2 operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

atanh¶

functions.atanh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The ATanH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

band_arithmetic¶

functions.band_arithmetic(band_indexes=None, astype=None, method=0)¶

The band_arithmetic function performs an arithmetic operation on the bands of a raster. For more information, see Band Arithmetic function at http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/band-arithmetic-function.htm

Parameters

raster – the input raster / imagery layer
band_indexes – band indexes or expression
astype – output pixel type
method – int (0 = UserDefined, 1 = NDVI, 2 = SAVI, 3 = TSAVI, 4 = MSAVI, 5 = GEMI, 6 = PVI, 7 = GVITM, 8 = Sultan)

Returns

band_arithmetic applied to the input raster

bitwise_and¶

functions.bitwise_and(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseAnd operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

bitwise_left_shift¶

functions.bitwise_left_shift(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseLeftShift operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

bitwise_not¶

functions.bitwise_not(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseNot operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

bitwise_or¶

functions.bitwise_or(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseOr operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

bitwise_right_shift¶

functions.bitwise_right_shift(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseRightShift operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

bitwise_xor¶

functions.bitwise_xor(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BitwiseXOr operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

boolean_and¶

functions.boolean_and(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BooleanAnd operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

boolean_not¶

functions.boolean_not(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BooleanNot operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

boolean_or¶

functions.boolean_or(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BooleanOr operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

boolean_xor¶

functions.boolean_xor(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The BooleanXOr operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

classify¶

functions.classify(raster2=None, classifier_definition=None, astype=None)¶

classifies a segmented raster to a categorical raster.

Parameters

raster1 – the first raster - imagery layers filtered by where clause, spatial and temporal filters
raster2 – Optional segmentation raster - If provided, pixels in each segment will get same class assignments. imagery layers filtered by where clause, spatial and temporal filters
classifier_definition – the classifier parameters as a Python dictionary / json format

Returns

the output raster with this function applied to it

clip¶

functions.clip(geometry=None, clip_outside=True, astype=None)¶

Clips a raster using a rectangular shape according to the extents defined or will clip a raster to the shape of an input polygon. The shape defining the clip can clip the extent of the raster or clip out an area within the raster.

Parameters

raster – input raster
geometry – clipping geometry
clip_outside – boolean, If True, the imagery outside the extents will be removed, else the imagery within the clipping_geometry will be removed.
astype – output pixel type

Returns

the clipped raster

colormap¶

functions.colormap(colormap_name=None, colormap=None, colorramp=None, astype=None)¶

Transforms the pixel values to display the raster data as a color (RGB) image, based on specific colors in a color map. For more information, see Colormap function at http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/colormap-function.htm

Parameters

raster – input raster
colormap_name – colormap name, if one of Random | NDVI | Elevation | Gray
colormap –
[ [<value1>, <red1>, <green1>, <blue1>], //[int, int, int, int] [<value2>, <red2>, <green2>, <blue2>] ],
colorramp – Can be a string specifiying color ramp name like <Black To White|Yellow To Red|Slope|more..> or a color ramp object. For more information about colorramp object, see color ramp object at http://resources.arcgis.com/en/help/arcgis-rest-api/#/Color_ramp_objects/02r3000001m0000000/)
astype – output pixel type

Returns

the colorized raster

colormap_to_rgb¶

functions.colormap_to_rgb()¶

” The function is designed to work with single band image service that has internal colormap. It will convert the image into a three-band 8-bit RGB raster. This function takes no arguments except an input raster. For qualified image service, there are two situations when ColormapToRGB function is automatically applied: The “colormapToRGB” property of the image service is set to true; or, client asks to export image into jpg or png format. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/colormap-to-rgb-function.htm)

Parameters: raster – the input raster / imagery layer
Returns: Three band raster

colorspace_conversion¶

functions.colorspace_conversion(conversion_type='rgb_to_hsv')¶

The ColorspaceConversion function converts the color model of a three-band unsigned 8-bit image from either the hue, saturation, and value (HSV) to red, green, and blue (RGB) or vice versa. An ExtractBand function and/or a Stretch function are sometimes used for converting the imagery into valid input of ColorspaceConversion function. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/color-model-conversion-function.htm

Parameters

raster – the input raster
conversion_type – sting type, one of “rgb_to_hsv” or “hsv_to_rgb”. Default is “rgb_to_hsv”

Returns

the output raster with this function applied to it

complex¶

functions.complex()¶

Complex function computes magnitude from complex values. It is used when input raster has complex pixel type. It computes magnitude from complex value to convert the pixel type to floating point for each pixel. It takes no argument but an optional input raster. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/complex-function.htm

Parameters: raster – the input raster / imagery layer
Returns: Output raster obtained after applying the function

composite_band¶

functions.composite_band(astype=None)¶

Combines multiple images to form a multiband image.

Parameters

rasters – input rasters
astype – output pixel type

Returns

the multiband image

con¶

functions.con(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The con operation.Performs a conditional if/else evaluation on each of the input cells of an input raster.: For more information see, http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/con-.htm

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

contrast_brightness¶

functions.contrast_brightness(contrast_offset=2, brightness_offset=1, astype=None)¶

The ContrastBrightness function enhances the appearance of raster data (imagery) by modifying the brightness or contrast within the image. This function works on 8-bit input raster only.

Parameters

raster – input raster
contrast_offset – double, -100 to 100
brightness_offset – double, -100 to 100
astype – pixel type of result raster

Returns

output raster

convolution¶

functions.convolution(kernel=None, astype=None)¶

The Convolution function performs filtering on the pixel values in an image, which can be used for sharpening an image, blurring an image, detecting edges within an image, or other kernel-based enhancements. For more information,

see Convolution function at http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/convolution-function.htm

Parameters

raster – input raster
kernel – well known kernel from arcgis.raster.kernels or user defined kernel passed as a list of list
astype – pixel type of result raster

Returns

output raster

cos¶

functions.cos(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Cos operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

cosh¶

functions.cosh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The CosH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

curvature¶

functions.curvature(curvature_type='standard', z_factor=1, astype=None)¶

The Curvature function displays the shape or curvature of the slope. A part of a surface can be concave or convex; you can tell that by looking at the curvature value. The curvature is calculated by computing the second derivative of the surface. Refer to this conceptual help on how it works.

http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/curvature-function.htm

Parameters

raster – input raster
curvature_type – ‘standard’, ‘planform’, ‘profile’
z_factor – double
astype – output pixel type

Returns

the output raster

divide¶

functions.divide(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Divide operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

duration¶

functions.duration(min_value=None, max_value=None, undefined_class=None, astype=None)¶

Returns the duration (number of bands) between a minimum and maximum value. The Duration method finds the longest consecutive elements in the array, where each element has a value greater than or equal to min_value and less than or equal to max_value, and then returns its length.

See http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/argstatistics-function.htm

Parameters

rasters – the imagery layers filtered by where clause, spatial and temporal filters
undefined_class – int, required

Returns

the output raster with this function applied to it

elevation_void_fill¶

functions.elevation_void_fill(max_void_width=0, astype=None)¶

The elevation_void_fill function is used to create pixels where holes exist in your elevation. Refer to <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/elevation-void-fill-function.htm”> this conceptual help</a> on how it works. The arguments for the elevation_void_fill function are as follows:

Parameters

raster – input raster
max_void_width – number. Maximum void width to fill. 0: fill all
astype – output pixel type

Returns

the output raster

equal_to¶

functions.equal_to(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The EqualTo operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

exp¶

functions.exp(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Exp operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

exp10¶

functions.exp10(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Exp10 operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

exp2¶

functions.exp2(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Exp2 operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

expression¶

functions.expression(expression='(B3 - B1 / B3 + B1)', astype=None)¶

Use a single-line algebraic formula to create a single-band output. The supported operators are -, +, /, *, and unary -. To identify the bands, prepend the band number with a B or b. For example: “BandIndexes”:”(B1 + B2) / (B3 * B5)”

Parameters

raster – the input raster / imagery layer
expression – the algebric formula
astype – output pixel type

Returns

output raster

Returns

extract_band¶

functions.extract_band(band_ids=None, band_names=None, band_wavelengths=None, missing_band_action=None, wavelength_match_tolerance=None, astype=None)¶

The extract_band function allows you to extract one or more bands from a raster, or it can reorder the bands in a multiband image. The arguments for the extract_band function are as follows:

Parameters

raster – input raster
band_ids – array of int
band_names – array of string
band_wavelengths – array of double
missing_band_action – int, 0 = esriMissingBandActionFindBestMatch, 1 = esriMissingBandActionFail
wavelength_match_tolerance – double
astype – output pixel type

Returns

the output raster

FLOAT¶

functions.FLOAT(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Float operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

float_divide¶

functions.float_divide(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The FloatDivide operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

floor_divide¶

functions.floor_divide(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The FloorDivide operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

gemi¶

functions.gemi(band_indexes='4 3', astype=None)¶

Global Environmental Monitoring Index GEMI = eta*(1-0.25*eta)-((Red-0.125)/(1-Red)) where eta = (2*(NIR^2-Red^2)+1.5*NIR+0.5*Red)/(NIR+Red+0.5)

Parameters: raster – the input raster / imagery layer

:param band_indexes:”NIR Red”, e.g., “4 3” :param astype: output pixel type :return: output raster

geometric¶

functions.geometric(geodata_transforms=None, append_geodata_xform=None, z_factor=None, z_offset=None, constant_z=None, correct_geoid=None, astype=None)¶

The geometric function transforms the image (for example, orthorectification) based on a sensor definition and a terrain model.This function was added at 10.1.The arguments for the geometric function are as follows:

Parameters

raster – input raster
geodata_transforms – Please refer to the Geodata Transformations documentation for more details.
append_geodata_xform – boolean
z_factor – double
z_offset – double
constant_z – double
correct_geoid – boolean
astype – output pixel type

Returns

the output raster

grayscale¶

functions.grayscale(conversion_parameters=None)¶

The Grayscale function converts a multi-band image into a single-band grayscale image. Specified weights are applied to each of the input bands, and a normalization is applied for output. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/grayscale-function.htm

Parameters

raster – the input raster
conversion_parameters – array of double (A length of N array representing weights for each band, where N=band count.)

Returns

the output raster with this function applied to it

greater_than¶

functions.greater_than(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The GreaterThan operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

greater_than_equal¶

functions.greater_than_equal(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The GreaterThanEqual operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

gvitm¶

functions.gvitm(band_indexes='1 2 3 4 5 6', astype=None)¶

Green Vegetation Index - Landsat TM GVITM = -0.2848*Band1-0.2435*Band2-0.5436*Band3+0.7243*Band4+0.0840*Band5-1.1800*Band7

Parameters: raster – the input raster / imagery layer

:param band_indexes:”NIR Red”, e.g., “4 3” :param astype: output pixel type :return: output raster

hillshade¶

functions.hillshade(azimuth=215.0, altitude=75.0, z_factor=0.3, slope_type=1, ps_power=None, psz_factor=None, remove_edge_effect=None, astype=None, hillshade_type=0)¶

A hillshade is a grayscale 3D model of the surface taking the sun’s relative position into account to shade the image. For more information, see <a href=’http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/hillshade-function.htm’>hillshade function</a> and <a href=”http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/how-hillshade-works.htm”>How hillshade works.</a> The arguments for the hillshade function are as follows:

Parameters

dem – input DEM
azimuth – double (e.g. 215.0)
altitude – double (e.g. 75.0)
z_factor – double (e.g. 0.3)
slope_type – new at 10.2. 1=DEGREE, 2=PERCENTRISE, 3=SCALED. default is 1.
ps_power – new at 10.2. double, used together with SCALED slope type
psz_factor – new at 10.2. double, used together with SCALED slope type
remove_edge_effect – new at 10.2. boolean, true of false
astype – output pixel type
hillshade_type – new at 10.5.1 0 = traditional, 1 = multi - directional; default is 0

Returns

the output raster

identity¶

functions.identity()¶

” The function is used to define the source raster as part of the default mosaicking behavior of the mosaic dataset. This function is a no-op function and takes no arguments except a raster. For more information, see (http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/identity-function.htm)

Parameters: raster – the input raster / imagery layer
Returns: the innput raster

INT¶

functions.INT(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Int operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

is_null¶

functions.is_null(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The IsNull operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

less_than¶

functions.less_than(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The LessThan operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

less_than_equal¶

functions.less_than_equal(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The LessThanEqual operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

ln¶

functions.ln(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Ln operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

local¶

functions.local(operation, extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The local function allows you to perform bitwise, conditional, logical, mathematical, and statistical operations on a pixel-by-pixel basis. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/local-function.htm”>local function</a>.

License:At 10.5, you must license your ArcGIS Server as ArcGIS Server 10.5.1 Enterprise Advanced or: ArcGIS Image Server to use this resource. At versions prior to 10.5, the hosting ArcGIS Server needs to have a Spatial Analyst license.

The arguments for the local function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
operation – int see reference at http://resources.arcgis.com/en/help/arcobjects-net/componenthelp/index.html#//004000000149000000
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

log10¶

functions.log10(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Log10 operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

log2¶

functions.log2(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Log2 operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

majority¶

functions.majority(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Majority operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

mask¶

functions.mask(no_data_values=None, included_ranges=None, no_data_interpretation=None, astype=None)¶

The mask function changes the image by specifying a certain pixel value or a range of pixel values as no data. The arguments for the mask function are as follows:

Parameters

raster – input raster
no_data_values – array of string [“band0_val”,”band1_val”,…]
included_ranges – array of double [band0_lowerbound,band0_upperbound,band1…],
no_data_interpretation – int 0=MatchAny, 1=MatchAll
astype – output pixel type

Returns

the output raster

max¶

functions.max(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Max operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

mean¶

functions.mean(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Mean operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

med¶

functions.med(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Med operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

min¶

functions.min(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Min operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

minority¶

functions.minority(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Minority operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

minus¶

functions.minus(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The binary Minus (subtraction,-) operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

ml_classify¶

functions.ml_classify(signature, astype=None)¶

The ml_classify function allows you to perform a supervised classification using the maximum likelihood classification: algorithm. The hosting ArcGIS Server needs to have a Spatial Analyst license.LicenseLicense:At 10.5, you must license your ArcGIS Server as ArcGIS Server 10.5.1 Enterprise Advanced or ArcGIS Image Server to use this resource. At versions prior to 10.5, the hosting ArcGIS Server needs to have a Spatial Analyst license. The arguments for the ml_classify function are as follows:

Parameters

raster – input raster
signature – string. a signature string returned from computeClassStatistics (GSG)
astype – output pixel type

Returns

the output raster

mod¶

functions.mod(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Mod operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

msavi¶

functions.msavi(band_indexes='4 3', astype=None)¶

Modified Soil Adjusted Vegetation Index MSAVI2 = (1/2)*(2(NIR+1)-sqrt((2*NIR+1)^2-8(NIR-Red)))

Parameters

raster – the input raster / imagery layer
band_indexes – “NIR Red”, e.g., “4 3”
astype – output pixel type

Returns

output raster

ndvi¶

functions.ndvi(band_indexes='4 3', astype=None)¶

Normalized Difference Vegetation Index NDVI = ((NIR - Red)/(NIR + Red))

Parameters

raster – the input raster / imagery layer
band_indexes – Band Indexes “NIR Red”, e.g., “4 3”
astype – output pixel type

Returns

Normalized Difference Vegetation Index raster

negate¶

functions.negate(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Negate operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

not_equal¶

functions.not_equal(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The NotEqual operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

pansharpen¶

functions.pansharpen(ms_raster, ir_raster=None, fourth_band_of_ms_is_ir=True, weights=[0.166, 0.167, 0.167, 0.5], type='ESRI', sensor=None)¶

The Pansharpening function uses a higher-resolution panchromatic raster to fuse with a lower-resolution, multiband raster. It can generate colorized multispectral image with higher resolution. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/pansharpening-function.htm

Parameters

pan_raster – raster, which is panchromatic
ms_raster – raster, which is multispectral
ir_raster – Optional, if fourth_band_of_ms_is_ir is true or selected pansharpening method doesn’t require near-infrared image
fourth_band_of_ms_is_ir – Boolean, “true” if “ms_raster” has near-infrared image on fourth band
weights – Weights applied for Red, Green, Blue, Near-Infrared bands. 4-elements array, Sum of values is 1
type – string, describes the Pansharpening method one of “IHS”, “Brovey” “ESRI”, “SimpleMean”, “Gram-Schmidt”. Default is “ESRI”
sensor – string, it is an optional parameter to specify the sensor name

Returns

output raster with function applied

plus¶

functions.plus(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The binary Plus (addition,+) operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

power¶

functions.power(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Power operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

pvi¶

functions.pvi(band_indexes='4 3 0.3 0.5', astype=None)¶

Perpendicular Vegetation Index PVI = (NIR-a*Red-b)/(sqrt(1+a^2))

Parameters: raster – the input raster / imagery layer

:param band_indexes:”NIR Red a b”, e.g., “4 3 0.3 0.5” :param astype: output pixel type :return: output raster

cellstats_range¶

functions.cellstats_range(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Range operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

raster_calculator¶

functions.raster_calculator(input_names, expression, extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The RasterCalculator function provides access to all existing math functions so you can make calls to them when building your expressions. The calculator function requires single-band inputs. If you need to perform expressions on bands in a multispectral image as part of a function chain, you can use the Extract Bands Function before the RasterCalculator function. For more info including operators supported, see Calculator function http://pro.arcgis.com/en/pro-app/help/data/imagery/calculator-function.htm

Parameters

raster – array of rasters
input_names – array of strings for arbitrary raster names.
expression – string, expression to calculate output raster from input rasters
extent_type – string, one of “FirstOf”, “IntersectionOf” “UnionOf”, “LastOf”. Default is “FirstOf”.
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf “MeanOf”, “LastOf”. Default is “FirstOf”.
astype – output pixel type

Returns

output raster with function applied

remap¶

functions.remap(input_ranges=None, output_values=None, geometry_type=None, geometries=None, no_data_ranges=None, allow_unmatched=None, astype=None)¶

The remap function allows you to change or reclassify the pixel values of the raster data. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/remap-function.htm”>remap function</a>.

The arguments for the remap function are as follows:

Parameters

raster – input raster
input_ranges – [double, double,…], input ranges are specified in pairs: from (inclusive) and to (exclusive).
output_values – [double, …], output values of corresponding input ranges
geometry_type – added at 10.3
geometries – added at 10.3
no_data_ranges – [double, double, …], nodata ranges are specified in pairs: from (inclusive) and to (exclusive).
allow_unmatched – Boolean, specify whether to keep the unmatched values or turn into nodata.
astype – output pixel type

Returns

the output raster

resample¶

functions.resample(resampling_type=None, input_cellsize=None, output_cellsize=None, astype=None)¶

The resample function resamples pixel values from a given resolution.The arguments for the resample function are as follows:

Parameters

raster – input raster
resampling_type – one of NearestNeighbor,Bilinear,Cubic,Majority,BilinearInterpolationPlus,BilinearGaussBlur, BilinearGaussBlurPlus, Average, Minimum, Maximum,VectorAverage(require two bands)
input_cellsize – point that defines cellsize in source spatial reference
output_cellsize – point that defines output cellsize
astype – output pixel type

Returns

the output raster

round_down¶

functions.round_down(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The RoundDown operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

round_up¶

functions.round_up(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The RoundUp operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

savi¶

functions.savi(band_indexes='4 3 0.33', astype=None)¶

Soil-Adjusted Vegetation Index SAVI = ((NIR - Red) / (NIR + Red + L)) x (1 + L) where L represents amount of green vegetative cover, e.g., 0.5

Parameters

raster – the input raster / imagery layer
band_indexes – “BandIndexes”: “NIR Red L”, for example, “4 3 0.33”
astype – output pixel type

Returns

output raster

segment_mean_shift¶

functions.segment_mean_shift(spectral_detail=None, spatial_detail=None, spectral_radius=None, spatial_radius=None, min_num_pixels_per_segment=None, astype=None)¶

The segment_mean_shift function produces a segmented output. Pixel values in the output image represent the converged RGB colors of the segment. The input raster needs to be a 3-band 8-bit image. If the imagery layer is not a 3-band 8-bit unsigned image, you can use the Stretch function before the segment_mean_shift function.

License:At 10.5, you must license your ArcGIS Server as ArcGIS Server 10.5.1 Enterprise Advanced or ArcGIS Image Server to use this resource. At versions prior to 10.5, the hosting ArcGIS Server needs to have a Spatial Analyst license.

When specifying arguments for SegmentMeanShift, use either SpectralDetail,SpatialDetail as a pair, or use SpectralRadius, SpatialRadius. They have an inverse relationship. SpectralRadius = 21 - SpectralDetail, SpatialRadius = 21 - SpectralRadius

The arguments for the segment_mean_shift function are as follows:

Parameters

raster – input raster
spectral_detail – double 0-21. Bigger value is faster and has more segments.
spatial_detail – int 0-21. Bigger value is faster and has more segments.
spectral_radius – double. Bigger value is slower and has less segments.
spatial_radius – int. Bigger value is slower and has less segments.
min_num_pixels_per_segment – int
astype – output pixel type

Returns

the output raster

set_null¶

functions.set_null(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The SetNull operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

shaded_relief¶

functions.shaded_relief(azimuth=None, altitude=None, z_factor=None, colormap=None, slope_type=None, ps_power=None, psz_factor=None, remove_edge_effect=None, astype=None)¶

Shaded relief is a color 3D model of the terrain, created by merging the images from the Elevation-coded and Hillshade methods. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/shaded-relief-function.htm”>Shaded relief</a> function.

The arguments for the shaded_relief function are as follows:

Parameters

raster – input raster
azimuth – double (e.g. 215.0)
altitude – double (e.g. 75.0)
z_factor – double (e.g. 0.3)
colormap – [[<value1>, <red1>, <green1>, <blue1>], [<value2>, <red2>, <green2>, <blue2>]]
slope_type – 1=DEGREE, 2=PERCENTRISE, 3=SCALED. default is 1.
ps_power – double, used together with SCALED slope type
psz_factor – double, used together with SCALED slope type
remove_edge_effect – boolean, True or False
astype – output pixel type

Returns

the output raster

sin¶

functions.sin(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Sin operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

sinh¶

functions.sinh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The SinH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

slope¶

functions.slope(z_factor=None, slope_type=None, ps_power=None, psz_factor=None, remove_edge_effect=None, astype=None)¶

slope represents the rate of change of elevation for each pixel. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/slope-function.htm”>slope function</a> and <a href=”http://desktop.arcgis.com/en/arcmap/latest/tools/spatial-analyst-toolbox/how-slope-works.htm”>How slope works</a>. The arguments for the slope function are as follows:

Parameters

dem – input DEM
z_factor – double (e.g. 0.3)
slope_type – new at 10.2. 1=DEGREE, 2=PERCENTRISE, 3=SCALED. default is 1.
ps_power – new at 10.2. double, used together with SCALED slope type
psz_factor – new at 10.2. double, used together with SCALED slope type
remove_edge_effect – new at 10.2. boolean, true of false
astype – output pixel type

Returns

the output raster

spectral_conversion¶

functions.spectral_conversion(conversion_matrix)¶

The SpectralConversion function applies a matrix to a multi-band image to affect the spectral values of the output. In the matrix, different weights can be assigned to all the input bands to calculate each of the output bands. The column/row size of the matrix equals to the band count of input raster. For more information, see Spectral Conversion function http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/spectral-conversion-function.htm

Parameters

raster – the input raster
conversion_parameters – array of double (A NxN length one-dimension matrix, where N=band count.)

Returns

the output raster with this function applied to it

speckle¶

functions.speckle(filter_type='Lee', filter_size='3x3', noise_model='Multiplicative', noise_var=None, additive_noise_mean=None, multiplicative_noise_mean=1, nlooks=1, damp_factor=None)¶

The Speckle function filters the speckled radar dataset to smooth out the noise while retaining the edges or sharp features in the image. Four speckle reduction filtering algorithms are provided through this function. For more information including required and optional parameters for each filter and the default parameter values, see Speckle function http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/speckle-function.htm

Parameters

raster – input raster type
filter_type – string, one of “Lee”, “EnhancedLee” “Frost”, “Kaun”. Default is “Lee”.
filter_size – string, kernel size. One of “3x3”, “5x5”, “7x7”, “9x9”, “11x11”. Default is “3x3”.
noise_model – string, For Lee filter only. One of “Multiplicative”, “Additive”, “AdditiveAndMultiplicative”
noise_var – double, for Lee filter with noise_model “Additive” or “AdditiveAndMultiplicative”
additive_noise_mean – string, for Lee filter witth noise_model “AdditiveAndMultiplicative” only
multiplicative_noise_mean – double, For Lee filter with noise_model “Additive” or “AdditiveAndMultiplicative”
nlooks – int, for Lee, EnhancedLee and Kuan Filters
damp_factor – double, for EnhancedLee and Frost filters

Returns

output raster with function applied

sqrt¶

functions.sqrt(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Square Root operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

square¶

functions.square(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Square operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

focal_statistics¶

functions.focal_statistics(kernel_columns=None, kernel_rows=None, stat_type=None, columns=None, rows=None, fill_no_data_only=None, astype=None)¶

The focal_statistics function calculates focal statistics for each pixel of an image based on a defined focal neighborhood. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/statistics-function.htm”>statistics function</a>. The arguments for the statistics function are as follows:

Parameters

raster – input raster
kernel_columns – int (e.g. 3)
kernel_rows – int (e.g. 3)
stat_type –

int or string
There are four types of focal statistical functions: 1=Min, 2=Max, 3=Mean, 4=StandardDeviation -Min-Calculates the minimum value of the pixels within the neighborhood

-Max-Calculates the maximum value of the pixels within the neighborhood -Mean-Calculates the average value of the pixels within the neighborhood. This is the default. -StandardDeviation-Calculates the standard deviation value of the pixels within the neighborhood
columns – int (e.g. 3)
rows – int (e.g. 3)
fill_no_data_only – bool
astype – output pixel type

Returns

the output raster

statistics_histogram¶

functions.statistics_histogram(statistics=None, histograms=None)¶

” The function is used to define the statistics and histogram of a raster. It is normally used for control the default display of exported image. For more information, see Statistics and Histogram function, http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/statistics-and-histogram-function.htm

Parameters

raster – the input raster / imagery layer
statistics – array of statistics objects. (Predefined statistics for each band)
histograms – array of histogram objects. (Predefined histograms for each band)

Returns

Statistics and Histogram defined raster

std¶

functions.std(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Std operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

stretch¶

functions.stretch(stretch_type=0, min=None, max=None, num_stddev=None, statistics=None, dra=None, min_percent=None, max_percent=None, gamma=None, compute_gamma=None, sigmoid_strength_level=None, astype=None)¶

The stretch function enhances an image through multiple stretch types. For more information, see <a href=”http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/stretch-function.htm”>stretch function</a>.

Gamma stretch works with all stretch types. The Gamma parameter is needed when UseGamma is set to true. Min and Max can be used to define output minimum and maximum. DRA is used to get statistics from the extent in the export_image request. ComputeGamma will automatically calculate best gamma value to render exported image based on empirical model.

Stretch type None does not require other parameters. Stretch type StdDev requires NumberOfStandardDeviations, Statistics, or DRA (true). Stretch type Histogram (Histogram Equalization) requires the source dataset to have histograms or additional DRA (true). Stretch type MinMax requires Statistics or DRA (true). Stretch type PercentClip requires MinPercent, MaxPercent, and DRA (true), or histograms from the source dataset. Stretch type Sigmoid does not require other parameters.

Optionally, set the SigmoidStrengthLevel (1 to 6) to adjust the curvature of Sigmoid curve used in color stretch.

The arguments for the stretch function are as follows:

Parameters

raster – input raster
stretch_type – str, one of None, StdDev, Histogram, MinMax, PercentClip, 9 = Sigmoid
min – double
max – double
num_stddev – double (e.g. 2.5)
statistics – double (e.g. 2.5)[<min1>, <max1>, <mean1>, <standardDeviation1>], //[double, double, double, double][<min2>, <max2>, <mean2>, <standardDeviation2>]],
dra – boolean. derive statistics from current request, Statistics parameter is ignored when DRA is true
min_percent – double (e.g. 0.25), applicable to PercentClip
max_percent – double (e.g. 0.5), applicable to PercentClip
gamma – array of doubles
compute_gamma – optional, applicable to any stretch type when “UseGamma” is “true”
sigmoid_strength_level – int (1~6), applicable to Sigmoid
astype – output pixel type

Returns

the output raster

sultan¶

functions.sultan(band_indexes='1 2 3 4 5 6', astype=None)¶

Sultan’s Formula (transform to 3 band 8 bit image): Band 1 = (Band5 / Band6) x 100 Band 2 = (Band5 / Band1) x 100 Band 3 = (Band3 / Band4) x (Band5 / Band4) x 100

Parameters: raster – the input raster / imagery layer

:param band_indexes:”Band1 Band2 Band3 Band4 Band5 Band6”, e.g., “1 2 3 4 5 6” :param astype: output pixel type :return: output raster

sum¶

functions.sum(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Sum operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

tan¶

functions.tan(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Tan operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

tanh¶

functions.tanh(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The TanH operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

tasseled_cap¶

functions.tasseled_cap()¶

” The function is designed to analyze and map vegetation and urban development changes detected by various satellite sensor systems. It is known as the Tasseled Cap transformation due to the shape of the graphical distribution of data. This function takes no arguments except a raster. The input for this function is the source raster of image service. There are no other parameters for this function because all the information is derived from the input’s properties and key metadata (bands, data type, and sensor name). Only imagery from the Landsat MSS, Landsat TM, Landsat ETM+, IKONOS, QuickBird, WorldView-2 and RapidEye sensors are supported. Prior to applying this function, there should not be any functions that would alter the pixel values in the function chain, such as the Stretch, Apparent Reflectance or Pansharpening function. The only exception is for Landsat ETM+; when using Landsat ETM+, the Apparent Reflectance function must precede the Tasseled Cap function. For more information, see http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/tasseled-cap-transformation.htm

Parameters: raster – the input raster / imagery layer
Returns: the output raster with TasseledCap function applied to it

threshold¶

functions.threshold(astype=None)¶

The binary threshold function produces the binary image. It uses the Otsu method and assumes the input image to have: a bi-modal histogram. The arguments for the threshold function are as follows:

Parameters

raster – input raster
astype – output pixel type

Returns

the output raster

times¶

functions.times(extent_type='FirstOf', cellsize_type='FirstOf', astype=None)¶

The Times (multiplication,*) operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
astype – output pixel type

Returns

the output raster

transpose_bits¶

functions.transpose_bits(input_bit_positions=None, output_bit_positions=None, constant_fill_check=None, constant_fill_value=None, fill_raster=None, astype=None)¶

The transpose_bits function performs a bit operation. It extracts bit values from the source data and assigns them to new bits in the output data.The arguments for the transpose_bits function are as follows:

If constant_fill_check is False, it assumes there is an input fill_raster. If an input fill_raster is not given, it falls back constant_fill_check to True and looks for constant_fill_value. Filling is used to initialize pixel values of the output raster. Landsat 8 has a quality assessment band. The following are the example input and output bit positions to extract confidence levels by mapping them to 0-3: * Landsat 8 Water: {“input_bit_positions”:[4,5],”output_bit_positions”:[0,1]} * Landsat 8 Cloud Shadow: {“input_bit_positions”:[6,7],”output_bit_positions”:[0,1]} * Landsat 8 Vegetation: {“input_bit_positions”:[8,9],”output_bit_positions”:[0,1]} * Landsat 8 Snow/Ice: {“input_bit_positions”:[10,11],”output_bit_positions”:[0,1]} * Landsat 8 Cirrus: {“input_bit_positions”:[12,13],”output_bit_positions”:[0,1]} * Landsat 8 Cloud: {“input_bit_positions”:[14,15],”output_bit_positions”:[0,1]} * Landsat 8 Designated Fill: {“input_bit_positions”:[0],”output_bit_positions”:[0]} * Landsat 8 Dropped Frame: {“input_bit_positions”:[1],”output_bit_positions”:[0]} * Landsat 8 Terrain Occlusion: {“input_bit_positions”:[2],”output_bit_positions”:[0]}

Parameters

raster – input raster
input_bit_positions – array of long, required
output_bit_positions – array of long, required
constant_fill_check – bool, optional
constant_fill_value – int, required
fill_raster – optional, the fill raster
astype – output pixel type

Returns

the output raster

tsavi¶

functions.tsavi(band_indexes='4 3 0.33 0.50 1.50', astype=None)¶

Transformed Soil Adjusted Vegetation Index TSAVI = (s(NIR-s*Red-a))/(a*NIR+Red-a*s+X*(1+s^2))

Parameters

raster – the input raster / imagery layer
band_indexes – “NIR Red s a X”, e.g., “4 3 0.33 0.50 1.50” where a = the soil line intercept, s = the soil line slope, X = an adjustment factor that is set to minimize soil noise
astype – output pixel type

Returns

output raster

unit_conversion¶

functions.unit_conversion(from_unit=None, to_unit=None, astype=None)¶

The unit_conversion function performs unit conversions.The arguments for the unit_conversion function are as follows: from_unit and to_unit take the following str values: Speed Units: MetersPerSecond, KilometersPerHour, Knots, FeetPerSecond, MilesPerHour Temperature Units: Celsius,Fahrenheit,Kelvin Distance Units: str, one of Inches, Feet, Yards, Miles, NauticalMiles, Millimeters, Centimeters, Meters

Parameters

raster – input raster
from_unit – units constant listed below (int)
to_unit – units constant listed below (int)
astype – output pixel type

Returns

the output raster

variety¶

functions.variety(extent_type='FirstOf', cellsize_type='FirstOf', ignore_nodata=False, astype=None)¶

The Variety operation

The arguments for this function are as follows:

Parameters

rasters – array of rasters. If a scalar is needed for the operation, the scalar can be a double or string
extent_type – one of “FirstOf”, “IntersectionOf”, “UnionOf”, “LastOf”
cellsize_type – one of “FirstOf”, “MinOf”, “MaxOf, “MeanOf”, “LastOf”
ignore_nodata – True or False, set to True to ignore NoData values
astype – output pixel type

Returns

the output raster

vector_field¶

functions.vector_field(raster_v_dir, input_data_type='Vector-UV', angle_reference_system='Geographic', output_data_type='Vector-UV', astype=None)¶

The VectorField function is used to composite two single-band rasters (each raster represents U/V or Magnitude/Direction) into a two-band raster (each band represents U/V or Magnitude/Direction). Data combination type (U-V or Magnitude-Direction) can also be converted interchangeably with this function. For more information, see Vector Field function (http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/vector-field-function.htm)

Parameters

raster_u_mag – raster item representing ‘U’ or ‘Magnitude’ - imagery layers filtered by where clause, spatial and temporal filters
raster_v_dir – raster item representing ‘V’ or ‘Direction’ - imagery layers filtered by where clause, spatial and temporal filters
input_data_type – string, ‘Vector-UV’ or ‘Vector-MagDir’ per input used in ‘raster_u_mag’ and ‘raster_v_dir’
angle_reference_system – string, optional when ‘input_data_type’ is ‘Vector-UV’, one of “Geographic”, “Arithmetic”
output_data_type – string, ‘Vector-UV’ or ‘Vector-MagDir’

Returns

the output raster with this function applied to it

vector_field_renderer¶

functions.vector_field_renderer(is_uv_components=None, reference_system=None, mass_flow_angle_representation=None, calculation_method='Vector Average', symbology_name='Single Arrow', astype=None)¶

The vector_field_renderer function symbolizes a U-V or Magnitude-Direction raster.The arguments for the vector_field_renderer function are as follows:

Parameters

raster – input raster
is_uv_components – bool
reference_system – int 1=Arithmetic, 2=Angular
mass_flow_angle_representation – int 0=from 1=to
calculation_method – string, “Vector Average” |
symbology_name – string, “Single Arrow” |
astype – output pixel type

Returns

the output raster

weighted_overlay¶

functions.weighted_overlay(fields, influences, remaps, eval_from, eval_to)¶

The WeightedOverlay function allows you to overlay several rasters using a common: measurement scale and weights each according to its importance. For more information, see

http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/weighted-overlay-function.htm

Parameters

raster – array of rasters
fields – array of string fields of the input rasters to be used for weighting.
influences – array of double, Each input raster is weighted according to its importance, or its influence. The sum of the influence weights must equal 1
remaps –

array of strings, Each value in an input raster is assigned a new value based on the
remap. The remap value can be a valid value or a NoData value.

param eval_from

required, numeric value of evaluation scale from

param eval_to

required, numeric value of evaluation scale to

Returns

output raster with function applied

weighted_sum¶

functions.weighted_sum(fields, weights)¶

The WeightedSum function allows you to overlay several rasters, multiplying each by their: given weight and summing them together. For more information, see

http://desktop.arcgis.com/en/arcmap/latest/manage-data/raster-and-images/weighted-sum-function.htm

Parameters

raster – array of rasters
fields – array of string fields of the input rasters to be used for weighting.
weights – array of double, The weight value by which to multiply the raster. It can be any positive or negative decimal value.

Returns

output raster with function applied