Raster function objects

Overview

This topic discusses the JSON representation of raster function objects, as well as raster function template syntax and examples.

The image service includes multiple operations that support the renderingRule parameter. A rendering rule defines how the requested image will be rendered or processed. It consists of a raster function, associated arguments, output pixel type, and variable name. The raster function name identifies the processing or rendering to be performed, the associated arguments provide parameter name value pairs used by the processing, and the output pixel type defines the output image's pixel type. Among the raster function arguments, there is one or more arguments that take rasters as input. The variableName operation identifies the argument name that takes raster inputs.

The image service includes a few well-known raster functions that do not need to be preconfigured with the service.

These well-known functions include the following, organized alphabetically:

A

ArgStatistics

Arithmetic

Aspect

B

BandArithmetic

C

CCDC

Classify

Clip

Colormap

ColormapToRGB

ColorspaceConversion

Complex

CompositeBand

ComputeChange

ContrastBrightness

Convolution

CreateColorComposite

Curvature

D

DetectChange

E

ElevationVoidFill

ExtractBand

G

Geometric

Greyscale

H

Hillshade

I

Identity

L

Local

M

Mask

MLClassify

MultidimensionalRaster

MultidimensionalFilter

N

NDVI

P

Pansharpening

ProcessRasterCollection

R

RasterCalculator

Recast

Remap

Resample

S

SegmentMeanShift

ShadedRelief

Slope

Speckle

SpectralConversion

SpectralUnmixing

Statistics

StatisticsHistogram

Stretch

SurfaceParamFunction

T

TasseledCap

Threshold

TransposeBits

Trend

TrendAnalysis

TrendToRGB

U

UnitConversion

V

Vectorfield

VectorFieldRenderer

W

WeightedOverlay

WeightedSum

Use a raster function template defined by the service

A raster function template defines a processing chain composed of one or more raster functions, including customized raster functions that are extended based on ArcObjects. Information about these raster function templates is available through the RasterFunctionInfos property in the Image Service topic. A client can omit rasterFunctionArguments and use the default configuration in the raster function template, or overwrite them by specifying argument parameters.

The name of the raster function template is displayed in the image service root resource. Function arguments are optional; argument names and default values are created by the author of the raster function template and are not known through REST. A client can provide the name of the raster function template only to the RasterFunction property or, optionally, provide arguments to overwrite the default values.

Service-defined raster function templates can group rasters using a designated attribute and resolve rasters using a tag. For example, a fish habitat suitability model may need multiple rasters from different variables, such as water temperature, salinity, and so on. The service publisher can define a raster function template that groups rasters by an attribute, for example, an attribute representing a particular slice in time and depth. Then it can resolve these rasters in a group using a tagged attribute, for example tag or variableName. The client can get this information from rasterFunctionInfos; the grouping and tagging are done on the server side, so the client can simply invoke the template.

For more information about authoring server-side raster function templates, see Server-side processing with raster functions.

Syntax
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{
  "rasterFunction": "rasterFunctionTemplateName",
  "rasterFunctionArguments": {
    "ArgumentName1": <>, //overwrite default value of ArgumentName1, type and default value are defined by the author of the template
    "ArgumentName2": <>, //overwrite default value of ArgumentName2, type and default value are defined by the author of the template
    ...
  },
  "variableName": "<>" //variableName can be other than "Raster", as defined by the author of the template
}

The following service has raster function templates defined:

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https://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer?f=pjson

This resource returns the following information for the supported raster function templates:

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"rasterFunctionInfos": [
  {
    "name": "None",
    "description": "A No-Op Function.",
    "help": ""
  },
  {
    "name": "RFTAspectColor",
    "description": "A raster function template.",
    "help": "This raster function template contains the following processing: aspect, remap, colormap and colormap to RGB functions. The remap function remaps divide 0 to 90 evenly to 8 directions, (N,NE,E,SE,S,SW,W,NW). The colormap function used the following color map for the 8 categories: [[0 176 176 176], [1 255 0 0],[2 255 166 0],[3 255 255 0],[4 0 255 0],[5 0 255 255],[6 0 166 255],[7 0 0 255],[8 255 0 255]]. To overwrite the default setting, use InputRanges (double array), NoDataRanges (double array), and OutputValues (int array) for remapping, and use Colormap to change colors."
  },
  {
    "name": "RFTShadedReliefElevationColorRamp",
    "description": "A raster function template.",
    "help": "This raster function template uses a shaded relief function. The default values of ZFactor is 1, Altitude is 45, and Azimuth is 315. An elevation colorramp is used."
  }
]

A client can use the use the supported raster functions with their default arguments, without additional properties included:

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https://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer/exportImage?bbox=1440000.0,535000.0,1455000.0,550000.0&bboxSR=&size=400,400&imageSR=&format=jpgpng&pixelType=UNKNOWN&noData=&interpolation=RSP_BilinearInterpolation&mosaicRule=&renderingRule={"rasterFunction": "RFTShadedReliefElevationColorRamp"}&f=image

A client can also use the supported raster functions with optional properties:

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https://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer/exportImage?bbox=1440000.0,535000.0,1455000.0,550000.0&bboxSR=&size=400,400&imageSR=&format=jpgpng&pixelType=UNKNOWN&noData=&interpolation=RSP_BilinearInterpolation&mosaicRule=&renderingRule={"rasterFunction": "RFTShadedReliefElevationColorRamp","rasterFunctionArguments":{"ZFactor":10},"variableName":"Raster"}&f=image

Turn off a default raster function template

By default, the Export Image operation applies the first raster function template in rasterFunctionInfos. You can change the rendering rule using the renderingRule parameter, or apply no additional processing by setting rasterFunction as None. If the first raster function template is None, it means, by default, no raster function template is used. The image service can use a default renderer if needed.

The following service (Toronto) has a Stretch function template applied by default:

Toronto stretch example

The Toronto service can have disable additional processing by specifying None as the raster function:

Toronto none example

When a single-band image service has a raster attribute table and RGB colors are available in the attribute table, Export Image automatically uses it to render an image service by default:

NLCD RGB example

This behavior can be turned off in the same way by specifying None as the raster function:

NLCD default example

Define a raster function template on the client side

A client can define a raster function template in the following ways:

by assigning a well-known raster function object as the value of a raster function argument. The argument must take a raster as input, for example specifying either Raster or DEM.
by chaining multiple well-known raster functions and specifying output pixel types; this does not apply to service-defined raster function templates.

In addition to well-known functions, service-defined raster function templates can also be used in client-defined raster function templates.

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{
  "rasterFunction": "<rasterFunctionName>",
  "rasterFunctionArguments": {
    "argument1": <value1>,
    "argument2": <value2>,
    "argumentn": <valuen>,
    "Raster": {  //this is the argument that takes raster inputs, e.g. DEM for the Hillshade function
      "rasterFunction": "<rasterFunctionName>",
      "rasterFunctionArguments": {
        "argument1": <value1>,
        "argument2": <value2>,
        "argumentn": <valuen>
      },
      "outputPixelType": "<outputPixelType>",
      "variableName": "<variableName>" //the inner function's variableName
    }
  },
  "outputPixelType": "<outputPixelType>"
}

This example demonstrates red and blue color mapping for a temperature image service (above or below 0° C).

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "Colormap": [
      [0, 255, 0, 0],
      [2, 0, 0, 255]
    ],
    "Raster": {
      "rasterFunction": "Remap",
      "rasterFunctionArguments": {
        "InputRanges": [-50.0,0,0,50],
        "OutputValues": [0,2],
        "Raster": "$$"
      },
      "outputPixelType": "U8"
    }
  },
  "outputPixelType": "U8"
}

Use rasters in rendering rules

The variableName value of a rendering rule designates which argument has a type of raster or rasters. It's optional for the following cases:

Well-known functions—The image service can find them based on the raster function name.
Service-defined raster function templates that use Raster or Rasters as the variableName.

Among the raster function arguments, there's one or more arguments that take a raster or an array of rasters as input, for example, the Raster argument for the Remap function and the DEM argument for the Hillshade function. A raster value can be the image service ($$) default, an image in the image service ($oid), or a result from another function (a rendering rule object). The argument name value pair can be optional in the following cases, and when not provided, the default is the image service ("Raster":"$$"):

Well-known functions—Functions that use Raster or DEM as the argument name.
Service-defined raster function templates if the argument name is Raster; otherwise, it must be provided.

You can reference an image in an image service or the result from another function. When using an individual raster in an image service as input, the Raster argument must be part of rasterFunctionArguments. The value of this argument is a dollar-objectID notation of the raster, for example, "Raster":"$1". When using the image service as input, you can also use $$ to represent the image service as part of rasterFunctionArguments (for example, "Raster":"$$").

This example demonstrates stretching the first raster.

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 3,
    "NumberOfStandardDeviations": 2.5,
    "Statistics": [
      [0, 255, 56.7, 54.8],
      [0, 255, 97.5, 94.5],
      [0, 255, 87.5, 87.3]
    ],
    "Gamma": [1.25, 1.25, 1.25],
  "Raster": "$1"
  },
  "outputPixelType": "U8"
}

This example demonstrates stretching the service.

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 3,
    "NumberOfStandardDeviations": 2.5,
    "Statistics": [
      [0, 255, 56.7, 54.8],
      [0, 255, 97.5, 94.5],
      [0, 255, 87.5, 87.3]
    ],
    "Gamma": [1.25, 1.25, 1.25],
  "Raster": "$$"
  },
"outputPixelType": "U8"
}

Multidimensional raster inputs

All raster functions that support multiple multidimensional raster inputs also support the following two multidimensional arguments:

MatchVariable—When this argument is set to true, the raster function will only proceed if the variables in the two or more input multidimensional rasters have the same name. This is the default. When it is set to false, the input multidimensional rasters can have variables with different names.
UnionDimension—When this argument is set to true, the raster function will only proceed if the dimensions in the two or more input multidimensional rasters have the same name. This is the default. When it is set to false, the dimensions do not have to have matching names, and the result will be the union of the dimensions. For example, if you add two multidimensional rasters that both have an ocean temperature variable named "temp", but one measure along dimension Time and one measure along dimension Depth, the result will be a multidimensional raster with both Time and Depth dimensions in which the temperature variable has been added together for each combination of dimensions.

Well-known functions

ArgStatistics

The ArgStatistics 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. For more information, see ArgStatistics function.

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{
  "rasterFunction": "ArgStatistics",
  "rasterFunctionArguments": {
    "ArgStatisticsType": <ArgStatisticsType>,  //int 0=maximum, 1= minimum, 2=median, 3=duration
    "MinValue": <MinValue>,  //double, required if the type is duration
    "MaxValue": <MaxValue>,  //double, required if the type is duration
    "UndefinedClass": <UndefinedClass>,  //int, required if the type is maximum or minimum
    "Rasters": [  //array of rasters.
      <raster1>,
      <raster2>,
      <raster3>
    ],
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to calculate the duration between 0.15 to 1 (the number of continuous bands that meet the condition):

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{
  "rasterFunction": "ArgStatistics",
  "rasterFunctionArguments": {
    "ArgStatisticsType": 3,
    "MinValue": 0.15,
    "MaxValue": 1,
    "UndefinedClass": 100,
    "Raster": "$$"
  }
}

Arithmetic

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

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{
  "rasterFunction": "Arithmetic",
  "rasterFunctionArguments": {
    "Raster": <Raster>,  //raster, or scalars(space delimited string, or array of double)
    "Raster2": <Raster2>,  //raster, or scalars(space delimited string, or array of double)
    "Operation": <Operation>,  //int 1=esriRasterPlus, 2=esriRasterMinus, 3=esriRasterMultiply, 4=esriRasterDivide, 5=esriRasterPower, 6=esriRasterMode
    "ExtentType": <ExtentType>,  //int; optional; default 0; 0=esriExtentFirstOf, 1=esriExtentIntersectionOf, 2=esriExtentUnionOf, 3=esriExtentLastOf
    "CellsizeType": <CellsizeType>,  //int; optional; default 0; 0=esriCellsizeFirstOf, 1=esriCellsizeMinOf, 2=esriCellsizeMaxOf, 3=esriCellsizeMeanOf, 4=esriCellsizeLastOf
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
}

This example demonstrates the esriRasterMinus (W) operation:

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{
  "rasterFunction": "Arithmetic",
  "rasterFunctionArguments": {
    "Raster" : "$$",
    "Raster2": "100",
    "Operation" : 2
  }
}

Aspect

The Aspect function identifies the downslope direction of the maximum rate of change in value from each cell to its neighbors. The values of the output raster will be the compass direction of the aspect. For more information, see Aspect function and How Aspect works.

The Aspect function takes no arguments.

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{
  "rasterFunction": "Aspect"
}

BandArithmetic

The BandArithmetic function performs an arithmetic operation on the bands of a raster dataset. For more information, see Band Arithmetic function.

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{
  "rasterFunction": "BandArithmetic",
  "rasterFunctionArguments": {
    "Method": <Method>,  //int (0 = UserDefined, 1 = NDVI, 2 = SAVI, 3 = TSAVI, 4 = MSAVI, 5 = GEMI, 6 = PVI, 7 = GVITM, 8 = Sultan, 9 = VARI)
    "BandIndexes": "<BandIndexes>",  //string e.g. (B3 - B1 / B3 + B1)
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

The equations and corresponding band indexes are listed below for each method. In all equations, NIR equals pixel values from the near-infrared band, and Red equals pixel values from the red band.

Method	Details
`0`	User defined 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)"
`1`	Normalized Difference Vegetation Index (NDVI) Use dark colors for code blocksCopy `1 ((NIR - Red)/(NIR + Red))` BandIndexes: "NIR Red", e.g., "4 3" Reference: Pinty, B. and Verstraete, M. M. 1992, "GEMI: a non-linear index to monitor global vegetation from satellites," Plant Ecology, Vol. 101, 15-20.
`2`	Soil-Adjusted Vegetation Index (SAVI) Use dark colors for code blocksCopy `1 ((NIR - Red) / (NIR + Red + L)) x (1 + L)` where L represents amount of green vegetative cover, e.g., 0.5 "BandIndexes": "NIR Red L", for example, "4 3 0.33" Reference: Huete, A. R., 1988, "A soil-adjusted vegetation index (SAVI)," Remote Sensing of Environment, Vol 25, 295-309.
`3`	Transformed Soil Adjusted Vegetation Index (TSAVI) Use dark colors for code blocksCopy `1 (s(NIR-sRed-a))/(aNIR+Red-as+X(1+s^2))` Where: a = the soil line intercept s = the soil line slope X = an adjustment factor that is set to minimize soil noise "BandIndexes": "NIR Red s a X", e.g., "4 3 0.33 0.50 1.50" Reference: Baret, F. and G. Guyot, 1991, "Potentials and limits of vegetation indices for LAI and APAR assessment," Remote Sensing of Environment, Vol. 35, 161-173.
`4`	Modified Soil Adjusted Vegetation Index (MSAVI2) Use dark colors for code blocksCopy `1 (1/2)(2(NIR+1)-sqrt((2NIR+1)^2-8(NIR-Red)))` BandIndexes: "NIR Red", e.g., "4 3" Reference: Qi, J. et al., 1994, "A modified soil vegetation adjusted index, " Remote Sensing of Environment, Vol. 48, No. 2, 119-126.
`5`	Global Environmental Monitoring Index (GEMI) Use dark colors for code blocksCopy `1 eta(1-0.25eta)-((Red-0.125)/(1-Red))` where eta = Use dark colors for code blocksCopy `1 (2(NIR^2-Red^2)+1.5NIR+0.5*Red)/(NIR+Red+0.5)` BandIndexes":"NIR Red", e.g., "4 3" Reference: Pinty, B. and Verstraete, M. M. 1992, "GEMI: a non-linear index to monitor global vegetation from satellites," Plant Ecology, Vol. 101, 15-20,
`6`	Perpendicular Vegetation Index (PVI) Use dark colors for code blocksCopy `1 (NIR-a*Red-b)/(sqrt(1+a^2))` where a = slope of the soil line, b = gradient of the soil line BandIndexes: "NIR Red a b", e.g., "4 3 0.3 0.5"
`7`	Green Vegetation Index - Landsat TM (GVITM) Use dark colors for code blocksCopy `1 -0.2848Band1-0.2435Band2-0.5436Band3+0.7243Band4+0.0840Band5-1.1800Band7` "BandIndexes":"Band1 Band2 Band3 Band4 Band5 Band7", e.g., "1 2 3 4 5 6" Reference: Todd, S. W., R. M. Hoffer, and D. G. Milchunas, 1998, "Biomass estimation on grazed and ungrazed rangelands using spectral indices," International Journal of Remote Sensing, Vol. 19, No. 3, 427-438.
`8`	Sultan's Formula (transform to 3 band 8 bit image) Band 1: Use dark colors for code blocksCopy `1 (Band5 / Band6) x 100` Band 2: Use dark colors for code blocksCopy `1 (Band5 / Band1) x 100` Band 3: Use dark colors for code blocksCopy `1 (Band3 / Band4) x (Band5 / Band4) x 100` "BandIndexes":"Band1 Band2 Band3 Band4 Band5 Band6", e.g., "1 2 3 4 5 6"
`9`	Visible Atmospherically Resistant Index (VARI) Use dark colors for code blocksCopy `1 (Green - Red)/(Green + Red - Blue)` BandIndexes: "Red Green Blue", e.g., "3 2 1" Reference: Anatoly A. Gitelson, Yoram J. Kaufman, Robert Stark, and Don Rundquist, 2002, "Novel algorithms for remote estimation of vegetation fraction," Remote Sensing of Environment, Vol. 80, 76-87.

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{
  "rasterFunction": "BandArithmetic",
  "rasterFunctionArguments": {
    "Method": 0,
    "BandIndexes": "(B3 - B1 / B3 + B1)",
    "Raster": <raster>  //optional, default is the image service
  },
  "variableName": "Raster"
}

CCDC

Introduced at 10.8.1, the CCDC function evaluates changes in pixel values over time using the Continuous Change Detection and Classification (CCDC) algorithm and generates a multidimensional raster containing the model results. For more information, see CCDC Analysis function.

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{
  "rasterFunction": "CCDC",
  "rasterFunctionArguments": {
    "Raster": <Raster>, //the input raster
    "BandIDs":  [
      <Band1>,
      <band2>,
      …
    ],//int, optional
    "TmaskBandIDs": [
      <Band2>,
      <Band4>,
      …
    ], //int, optional
    "ChiSquareProb": <ChiSquareProb>, //int, optional
    "MinNumberAnomaly": <MinNumberAnomaly>, //int, optional
    "UpdatingFrequency": <UpdatingFrequency> //int, optional
  }
}

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{
  "rasterFunction": CCDC",
  "rasterFunctionArguments": {
    "Raster": "$$",
    "BandIDs": [
      1,
      2
    ]
  }
}

Classify

The Classify function classifies a segmented raster to a categorical raster. For more information, see Classify function.

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{
  "rasterFunction": "Classify",
  "rasterFunctionArguments": {
    "ClassifierDefinition": <Definition_json>, //a json object that defines the classifier parameters.
    "Raster": <Raster>,  //the input raster, usually this is the service
    "Raster2": <Raster2>,  //optional. additional input raster which may contain the segment information. If provided, pixels in each segment will get same class assignments.
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to classify a segmented image using the maximum likelihood classifier:

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{
  "rasterFunction": "Classify",
  "rasterFunctionArguments": {
    "ClassifierDefinition": {
      "EsriClassifierDefinitionFile": 0,
      "FileVersion": 1,
      "NumberDefinitions": 1,
      "Definitions": [
        {
          "Classifier": "MaximumLikelihood",
          "NumberClasses": 2,
          "RasterIsSegmented": false,
          "NumberBands": 3,
          "Classes": [
            {
              "ClassValue": 1,
              "ClassName": "Vegetation",
              "Red": 230,
              "Green": 0,
              "Blue": 0,
              "Count": 546,
              "Means": [
                244.9359,
                14.88278,
                15.21978
              ],
              "Covariances": [
                [
                  10.26146,
                  0.1390063,
                  0.1074951
                ],
                [
                  0.1390063,
                  10.31593,
                  1.207584E-04
                ],
                [
                  0.1074951,
                  1.207584E-04,
                  10.19345
                ]
              ]
            },
            {
              "ClassValue": 2,
              "ClassName": "Water",
              "Red": 0,
              "Green": 77,
              "Blue": 168,
              "Count": 716,
              "Means": [
                15.05587,
                15.01257,
                244.9567
              ],
              "Covariances": [
                [
                  10.18124,
                  0.1152196,
                  0.2789551
                ],
                [
                  0.1152196,
                  10.02638,
                  -0.3583943
                ],
                [
                  0.2789551,
                  -0.3583943,
                  10.11684
                ]
              ]
            }
          ]
        }
      ]
    }
  }
}

Clip

The Clip function clips a raster using a rectangular shape according to the extents defined, or clips a raster to the shape of an input polygon feature class. The shape defining the clip can include the extent of the raster or an area within the raster. For more information, see Clip function.

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{
  "rasterFunction": "Clip",
  "rasterFunctionArguments": {
    "ClippingGeometry": <geometry>,  //a polygon or envelope
    "ClippingType": <clippingType>,  //int (1= clippingOutside, 2=clippingInside), use 1 to keep image inside of the geometry
    "Raster": <raster>,  //optional, default is the image service
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "Clip",
  "rasterFunctionArguments": {
    "ClippingGeometry": {
      "rings": [
        [
          [
            10,
            10
          ],
          [
            9,
            11
          ],
          [
            10,
            12
          ],
          [
            11,
            11
          ],
          [
            12,
            10
          ],
          [
            10,
            10
          ]
        ]
      ],
      "spatialReference": {
        "wkid": 4326
      }
    },
    "extent": {
      "xmin": 10,
      "ymin": 10,
      "xmax": 12,
      "ymax": 12,
      "spatialReference": {
        "wkid": 4326
      }
    },
    "ClippingType": 1
  },
  "variableName": "Raster"
}

Colormap

The Colormap function transforms the pixel values to display the raster data as a red, green, blue (RGB) color image, based on specific colors in a color map or a color range defined in a color ramp. For more information, see Colormap function. You can display raster data using a predefined ColorrampName or a customized Colorramp object. Several ArcGIS predefined color ramps are provided.

Predefined color ramp graphics and their corresponding names can be viewed from the layer's properties window on the Symbology tab. The particular color ramp or scheme name is specified in the ColorrampName argument object. For more information about color ramp objects, see Color ramp objects.

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "ColormapName": "<Random | NDVI | NDVI2 | NDVI3 | Elevation | Gray | Hillshade>",
    "Colormap": [
      [<value1>, <red1>, <green1>, <blue1>], //[int, int, int, int]
      [<value2>, <red2>, <green2>, <blue2>]
    ],
    "ColorrampName": "<Black To White | Yellow To Red | Slope | more…>",
    "Colorramp": {ColorRamp_json}comment //a json object that defines a range of colors,
    "Raster": <raster>//optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",//optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "ColormapName": "Random"
  },
  "variableName": "Raster"
}

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "Colormap": [
      [1,255,0,0],
      [2,0,255,0],
      [3,125,25,255]
    ]
  },
  "variableName": "Raster"
}

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "ColorrampName": "Blue Bright"
  },
  "variableName": "Raster"
}

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "colorramp": {
      "type": "multipart",
      "colorRamps": [
        {
          "type": "algorithmic",
          "fromColor": [
            255,
            0,
            0,
            255
          ],
          "toColor": [
            0,
            255,
            0,
            255
          ],
          "algorithm": "esriHSVAlgorithm"
        },
        {
          "type": "algorithmic",
          "fromColor": [
            155,
            34,
            78,
            255
          ],
          "toColor": [
            255,
            0,
            0,
            255
          ],
          "algorithm": "esriCIELabAlgorithm"
        }
      ]
    }
  }
}

ColormapToRGB

The ColormapToRGB function works with single band image service that has an internal color map. It converts the image to a three-band 8-bit RGB raster. This function takes no arguments except an input raster. For a qualified image service, there are two situations when the ColormapToRGB function is automatically applied: The colormapToRGB property of the image service is set to true, or the client requests to export the image to JPG or PNG format. For more information, see Colormap To RGB function.

The UnmappedAsRandomColor will assign a random RGB color to the pixel when set to true and colormap doesn’t specify how a raster pixel value.

Syntax
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{
  "rasterFunction": "ColormapToRGB",
  "rasterFunctionArguments": {
    "Raster": <raster>,  //optional, default is the image service
    "UnmappedAsRandomColor": <true|false>, //the default is false
  }
}

ColorspaceConversion

The ColorspaceConversion function converts the color model of a three-band unsigned 8-bit image from hue, saturation, and value (HSV) to red, green, and blue (RGB) or vice versa. The ExtractBand function or Stretch function are sometimes used for converting the imagery into valid input for the ColorspaceConversion function. For more information, see Color Model Conversion function.

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{
  "rasterFunction": "ColorspaceConversion",
  "rasterFunctionArguments": {
    "ConversionType": <int>, //0: convert color model from RGB to HSV; 1: convert color model from HSV to RGB
    "Raster": "$$" //optional, default is the image service
  }
}

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{
  "rasterFunction": "ColorspaceConversion",
  "rasterFunctionArguments": {
    "ConversionType": 0,
    "raster": "$$"
  }
}

Complex

The Complex function is used when the input raster has a complex pixel type. It computes magnitude from the complex value to convert the pixel type to floating point for each pixel. It takes no arguments except an optional input raster. For more information, see Complex function.

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{
  "rasterFunction": "Complex",
  "rasterFunctionArguments": {
    "Raster": <raster> //optional, default is the image service
  }
}

CompositeBand

The CompositeBand function combines multiple images to form a multiband image. For more information, see Composite Bands function.

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{
  "rasterFunction": "CompositeBand",
  "rasterFunctionArguments": {
    "Rasters": [  //array of rasters
      <raster>,
      <raster>,
      <raster>
    ]
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

ComputeChange

Introduced at 10.8.1, the ComputeChange function computes changes between two rasters. For more information, see Compute Change function. The difference (0), relative difference (1), and categorical (2) methods are for computing change between single-band rasters only. At 11.0, three methods for computing change between multiband rasters were added: Spectral Euclidean Distance (3), Spectral Angle Difference (4), and Band with Most Change (5).

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{
  "rasterFunction": "ComputeChange",
  "rasterFunctionArguments": {
    "Raster": <Raster>,  //the input raster
    "Raster2": <Raster2>,  //the input raster
    "Method": < Method>  //int, compute change method, 0 = difference, 1 = relative difference, 2 = categorical, 3 = Spectral Euclidean Distance, 4 = Spectral Angle Difference, 5 = Band with Most Change
  }
}

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{
  "rasterFunction": "ComputeChange",
  "rasterFunctionArguments": {
    "Raster": "$1",
    "Raster2": "$2",
    "Method": 0
  }
}

ContrastBrightness

The ContrastBrightness function enhances the appearance of raster data (imagery) by modifying the brightness or contrast of the image. This function works on 8-bit input rasters only. For more information, see Contrast and Brightness function.

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{
  "rasterFunction": "ContrastBrightness",
  "rasterFunctionArguments": {
    "ContrastOffset": <ContrastOffset>,  //double, -100 to 100
    "BrightnessOffset": <BrightnessOffset>,  //double, -100 to 100
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "ContrastBrightness",
  "rasterFunctionArguments": {
    "ContrastOffset": 30,
    "BrightnessOffset": 10,
    "Raster": "$$"
  }
}

Convolution

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

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{
  "rasterFunction": "Convolution",
  "rasterFunctionArguments": {
    "Columns": <Columns>,
    "Rows": <Rows>,
    "Kernel": [  //an array that has m x n elements
      <k11>,
      <k12>,
      ...
    ]
    "Type": <Type>,  //int (-1=UserDefined, 0=LineDetectionHorizontal, 1=LineDetectionVertical, 2=LineDetectionLeftDiagonal, 3=LineDetectionRightDiagonal, 4=GradientNorth, 5=GradientWest, 6=GradientEast, 7=GradientSouth, 8=GradientNorthEast, 9=GradientNorthWest, 10=SmoothArithmeticMean, 11=Smoothing3x3, 12=Smoothing5x5, 13=Sharpening3x3, 14=Sharpening5x5, 15=Laplacian3x3, 16=Laplacian5x5, 17=SobelHorizontal, 18=SobelVertical, 19=Sharpen, 20=Sharpen2, 21=PointSpread)
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "Convolution",
  "rasterFunctionArguments": {
    "Type": 11
  },
  "variableName": "Raster"
}

CreateColorComposite

Introduced at 11.0, the CreateColorComposite function creates a three-band raster from a multiband raster dataset in which each band can use an algebraic calculation based on band algebra. For more information, see Create Color Composite function.

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{  "rasterFunction":"CreateColorComposite",
  "rasterFunctionArguments": {   "Method":<0> or <1>,  // 0 – band names, 1 – band ids;
  "BandIndexesR": <band name> or <band id> or <expression using bands>, // define for R band
  "BandIndexesG": <band name> or <band id> or <expression using bands>, // define for G band
  "BandIndexesB": <band name> or <band id> or <expression using bands>, // define for B band
  "Raster": <raster>  // optional, default is the image service
  }
}

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{
"rasterFunction":"CreateColorComposite",
  "rasterFunctionArguments": {    "Method":1,
  "BandIndexesR":"B1",
  "BandIndexesG":"B2",
  "BandIndexesB":"B1-B2",
  "Raster":"$$"
  }
}

Curvature

The Curvature function displays the shape or curvature of the slope. A part of a surface can be concave or convex; you can determine which by reviewing the curvature value. The curvature is calculated by computing the second derivative of the surface. For more information, see Curvature function.

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{
  "rasterFunction": "Curvature",
  "rasterFunctionArguments": {
    "Type": <type>,  //0=Standard, 1=Platform, 2=Profile
    "ZFactor": <zFactor>,  //double
    "Raster": <Raster>  //optional, default is the service "$$"
  },
  "outputPixelType": "<outputPixelType>"//optional
}

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{
  "rasterFunction": "Curvature",
  "rasterFunctionArguments": {
    "Type": 0,
    "ZFactor": 1
  }
}

DetectChange

Introduced at 10.8.1, the DetectChange function generates a raster layer containing pixel change information using the output change analysis raster from the Analyze Changes Using CCDC tool. For more information, see Detect Change Using Change Analysis function.

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{
  "rasterFunction": "DetectChange",
  "rasterFunctionArguments": {
    "Raster": <Raster>,  //the input raster
    "ChangeType": <ChangeType>,  //int, 0=time of latest change, 1=time of earliest change, 2=time of largest, 3=number of changes
    "MaxNumberChanges": <MaxNumberChanges>  //int
  }
}

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{
  "rasterFunction": "DetectChange",
  "rasterFunctionArguments": {
    "Raster": "$$",
    "ChangeType": 0,
    "MaxNumberChanges": 1
  }
}

ElevationVoidFill

The ElevationVoidFill function creates pixels where holes exist in the elevation. For more information, see Elevation Void Fill function.

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{
  "rasterFunction": "ElevationVoidFill",
  "rasterFunctionArguments": {
    "MaxVoidWidth": <MaxVoidWidth>,  //number. Maximum void width to fill. 0: fill all
    "Raster": <Raster>  //optional, default is the service "$$"
  },
  "outputPixelType": "<outputPixelType>"  //optional
}

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{
  "rasterFunction": "ElevationVoidFill",
  "rasterFunctionArguments": {
    "MaxVoidWidth": 0
  }
}

ExtractBand

The ExtractBand function allows you to extract one or more bands from a raster, or it can reorder the bands in a multiband image. For more information, see Extract Band function.

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{
  "rasterFunction": "ExtractBand",
  "rasterFunctionArguments": {
    "BandIDs": [<id>,<id>,<id>], //array of int
    "BandNames": ["<name>","<name","<name"], //array of string
    "BandWavelengths": [<wavelength>,<wavelength>,<wavelength>], //array of double
    "MissingBandAction": <act>, //int, 0=esriMissingBandActionFindBestMatch, 1=esriMissingBandActionFail
    "WavelengthMatchTolerance": <WavelengthMatchTolerance>, //double
    "Raster": <raster>  //optional default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "ExtractBand",
  "rasterFunctionArguments": {
    "BandIDs": [3,2,1],
    "Raster": "$$"
  }
}

Geometric

The Geometric function transforms the image (for example, orthorectification) based on a sensor definition and a terrain model. For more information, see Geometric function.

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{
  "rasterFunction": "Geometric",
  "rasterFunctionArguments": {
    "GeodataTransforms": <GeodataTransform>,  //Refer to the Geodata Transformations documentation for more details.
    "AppendGeodataXform": <true|false>,  //boolean
    "ZFactor": <ZFactor>,  //double
    "ZOffset": <ZOffset>,  //double
    "ConstantZ": <ConstantZ>,  //double
    "CorrectGeoid": <true|false>,  //boolean
    "Raster":<raster>  //optional, default is the image service
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "Geometric",
  "rasterFunctionArguments": {
    "GeodataTransforms": [
      {
        "geodataTransform": "Polynomial",
        "geodataTransformArguments": {
          "sourcePoints": [
            {
              "x": 0,
              "y": 0
            },
            {
              "x": 0,
              "y": 200
            },
            {
              "x": 200,
              "y": 0
            }
          ],
          "targetPoints": [
            {
              "x": 100,
              "y": 100
            },
            {
              "x": 100,
              "y": 300
            },
            {
              "x": 300,
              "y": 100
            }
          ],
          "polynomialOrder": 1,
          "spatialReference": {
            "wkid": 54004
          }
        }
      }
    ],
    "AppendGeodataXform": true
  },
  "variableName": "Raster"
}

Grayscale

The Grayscale function converts a multiband image to a single-band grayscale image. Specified weights are applied to each input band, and a normalization is applied for output. For more information, see Grayscale function.

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{
  "rasterFunction": "Grayscale",
  "rasterFunctionArguments": {
    "conversionParameters": <array_of_double>,  //a length of N array representing weights for each band. N=band count.
    "Raster": <raster>  //optional, default is the image service
  }
}

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{
  "rasterfunction": "Grayscale",
  "rasterfunctionarguments": {
    "conversionparameters": [1,3,2],
    "raster": "$$"
  }
}

Output = (1 * Input_band_1 + 3 * Input_band_2 + 2 * Input_band_3)/(1 + 3 + 2);

Hillshade

The Hillshade function produces a grayscale 3D model of the surface taking the sun's relative position into account to shade the image. For more information, see Hillshade function and How Hillshade works.

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{
  "rasterFunction": "Hillshade",
  "rasterFunctionArguments": {
    "HillshadeType": <HillshadeType>,  //new at 10.5.1.; 0=traditional, 1=multi-directional; default is 0.
    "Azimuth": <Azimuth>,  //double (e.g. 215.0)
    "Altitude": <Altitude>,  //double (e.g. 75.0)
    "ZFactor": <ZFactor>,  //double (e.g. 0.3)
    "SlopeType": <SlopeType>,  //new at 10.2; 1=DEGREE, 2=PERCENTRISE, 3=SCALED; default is 1.
    "PSPower": <PSPower>,  //new at 10.2. double, used together with SCALED slope type
    "PSZFactor": <PSZFactor>,  //new at 10.2. double, used together with SCALED slope type
    "RemoveEdgeEffect": <SlopeType>,  //new at 10.2. boolean, true of false
    "DEM": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "DEM"
}

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{
  "rasterFunction": "Hillshade",
  "rasterFunctionArguments": {
    "Azimuth": 215.0,
    "Altitude": 75.0,
    "ZFactor": 0.3
  },
  "variableName": "DEM"
}

Identity

The Identity function defines the source raster as part of the default mosaicking behavior of the mosaic dataset. It is a no-op function and takes no arguments except a raster. For more information, see Identity function.

Syntax
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{
  "rasterFunction": "Identity",
  "rasterFunctionArguments": {
    "Raster": <raster>
  }
}

Local

The Local function performs bitwise, conditional, logical, mathematical, and statistical operations on a pixel-by-pixel basis. The Local function works on single-band imagery or the first band of an image only, and the output is single band. For more information, see Local function. There are many operations supported by the Local function, see esriGeoAnalysisFunctionEnum Constants for more information.

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{
  "rasterFunction": "Local",
  "rasterFunctionArguments": {
    "Operation": <operation>,  //int see reference below.
    "Rasters": [<raster1>, <raster2>, <raster3>],  //array of rasters. If a scalar is needed for the operation the scalar can be in double or string
    "ExtentType": <ExtentType>,  //int, optional, default 0. 0=esriExtentFirstOf, 1=esriExtentIntersectionOf, 2=esriExtentUnionOf, 3=esriExtentLastOf
    "CellsizeType": <CellsizeType>,//int, optional, default 0. 0=esriCellsizeFirstOf, 1=esriCellsizeMinOf, 2=esriCellsizeMaxOf, 3=esriCellsizeMeanOf, 4=esriCellsizeLastOf
    "ProcessAsMultiband": <true|false>, //boolean, optional, default is true. When set as false it will treat the input multiband raster as multiple 1-band rasters when performing cell statistics operations (for operations: 38~43, 47, 54, 55, 58, 66~75)
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",//optional
  "variableName": "Rasters"//optional
}

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{
  "rasterFunction": "Local",
  "rasterFunctionArguments": {
    "Operation": 2,
    "Rasters": ["$$",100]
  }
}

Mask

The Mask function changes the image by specifying a pixel value or a range of pixel values as no data. For more information, see Mask function.

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{
  "rasterFunction": "Mask",
  "rasterFunctionArguments": {
    "NoDataValues": [  //array of string
      "band0_val",
      "band1_val",
      ...
    ],
    "IncludedRanges": [  //array of double
      band0_lowerbound,
      band0_upperbound,
      band1
      ...
    ],
    "NoDataInterpretation": <NoDataInterpretation>,  //int 0=esriNoDataMatchAny, 1=esriNoDataMatchAll
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "Mask",
  "rasterFunctionArguments": {
    "NoDataValues": ["-100"],
    "IncludedRanges": [-800,100],
    "NoDataInterpretation": 0
  },
  "variableName": "Raster"
}

MLClassify

The MLClassify function performs a supervised classification using the maximum likelihood classification algorithm. The hosting ArcGIS Server installation must have an ArcGIS Spatial Analyst extension license. For more information, see MLClassify.

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{
  "rasterFunction": "MLClassify",
  "rasterFunctionArguments": {
    "SignatureFile": "<signature>",  //string. a signature string returned from computeClassStatistics (GSG)
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

MultidimensionalRaster

Introduced at 10.8.1, the MultidimensionalRaster function adds a multidimensional dataset, such as NetCDF, GRIB, and HDF data; a multidimensional mosaic dataset; or a multidimensional CRF to a multidimensional raster. For more information, see Multidimensional Raster function.

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{
  "rasterFunction": "MultidimensionalRaster",
  "rasterFunctionArguments": {
    "Variables": [   //array of string
      "<variable1_name>",
      "<variable2_name",
      …
    ]
    "InterpolationMethod": <int>,  //optional, used when the input raster is not regular grids. 0="Nearest Neighbor", 1="Linear Tinning", 2="Natural Neighbor", and 3="Inverse Distance Weighted". Default value is 0 .
    "InterpolationCellsize": <double>,  //optional, used when the input raster is not regular grids. Defines the cell size of the output raster. Default value = 1
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "MultidimensionalRaster",
  "rasterFunctionArguments": {
    "Variables": [
      "salinity",
      "water_temp"
    ]
    "Raster": "$$"
  }
}

MultidimensionalFilter

Introduced at 10.8.1, the MultidimensionalFilter function filters a multidimensional raster using specified variables and dimensions. For more information, see Multidimensional Filter function.

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{
  "rasterFunction": "MultidimensionalFilter",
  "rasterFunctionArguments": {
    "Filter": <filter_json>,  //a json object that defines the filter definition.
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to filter a raster using two variables, salinity and surf_el, with all slices.

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{
  "rasterFunction": "MultidimensionalFilter",
  "rasterFunctionArguments": {
    "Filter": {
      "variables": [
        "salinity",
        "surf_el"
      ],
      "definitionType": "ALL"
    },
    "Raster": "$$"
  }
}

This example demonstrates how to filter a raster using two variables, salinity and surf_el, with slices having StdTime as "2013-05-17T00:00:00" and "2013-05-17T15:00:00".

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{
  "rasterFunction": "MultidimensionalFilter",
  "rasterFunctionArguments": {
    "Filter": {
      "variables": [
        "salinity",
        "surf_el"
      ],
      "definitionType": "BY_VALUES",
      "dimensions": [
        "StdTime",
        "StdTime"
      ],
      "values": [
        "2013-05-17T00:00:00",
        "2013-05-17T15:00:00"
      ]
    },
    "Raster": "$$"
  }
}

This example demonstrates how to filter a raster using two variables, salinity and surf_el, with slices having StdTime in the ["2013-05-17T00:00:00", "2013-05-17T12:00:00"] range and StdZ in the [-40, 0] range.

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{
  "rasterFunction": "MultidimensionalFilter",
  "rasterFunctionArguments": {
    "Filter": {
      "variables": [
        "salinity",
        "surf_el"
      ],
      "definitionType": "BY_RANGES",
      "dimensions": [
        "StdTime",
        "StdZ"
      ],
      "minValues": [
        "2013-05-17T03:00:00",
        "-40"
      ],
      "maxValues": [
        "2013-05-17T12:00:00",
        "0"
      ]
    },
    "Raster": "$$"
  }
}

This example demonstrates how to filter a raster using two variables, salinity and surf_el, with slices having StdTime and stepping from "2013-05-17T03:00:00" to "2013-05-18T18:00:00" every three hours.

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{
  "rasterFunction": "MultidimensionalFilter",
  "rasterFunctionArguments": {
    "Filter": {
      "variables": [
        "salinity",
        "surf_el"
      ],
      "definitionType": "BY_ITERATION",
      "dimension": "StdTime",
      "startValue": "2013-05-17T03:00:00",
      "endValue": "2013-05-18T18:00:00",
      "stepValue": 3,
      "units": "HOURS"
    },
    "Raster": "$$"
  }
}

NDVI

The Normalized Difference Vegetation Index (NDVI) object is a standardized index that allows you to generate an image displaying greenness (relative biomass). This index uses the contrast of the characteristics of two bands from a multispectral raster dataset—the chlorophyll pigment absorptions in the red band and the high reflectivity of plant materials in the near-infrared (NIR) band. The NDVI function detects relative biomass (greenness) in a raster image. For more information, see NDVI function.

The following equation is used by the NDVI function to generate a 0–200 range 8 bit result:

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NDVI = ((IR - R)/(IR + R)) * 100 + 100

If you need the specific pixel values (-1.0 to 1.0), use the BandArithmetic function and choose the NDVI method.

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{
  "rasterFunction": "NDVI",
  "rasterFunctionArguments": {
    "VisibleBandID": <VisibleBandID>,  //int (zero-based band id, e.g. 2)
    "InfraredBandID": <InfraredBandID>,  //int (zero-based band id, e.g. 1)
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "NDVI",
  "rasterFunctionArguments": {
    "VisibleBandID": 2,
    "InfraredBandID": 1
  },
  "variableName": "Raster"
}

Pansharpening

The Pansharpening function uses a higher-resolution panchromatic raster to fuse with a lower-resolution multiband raster. It can generate a colorized multispectral image with higher resolution. For more information, see Pan-sharpening function.

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{
  "rasterFunction": "Pansharpening",
  "rasterFunctionArguments": {
    "Weights": <array_of_double>,  //Weights applied for Red, Green, Blue, Near-Infrared bands. 4-elements array, Sum of values is 1.
    "PansharpeningType": <int>,  //Pansharpening method, 0:IHS; 1:Brovey; 2:Esri; 3:Simple Mean; 4:Gram-Schmidt.
    "PanImage": <raster>,
    "MSImage": <raster>,
    "InfraredImage": <raster>,  //optional if "UseFourthBandOfMSAsIR" is true or selected pansharpening method doesn’t require near-infrared image.
    "UseFourthBandOfMSAsIR": <true|false>,  //true if "MSImage" has near-infrared image on fourth band.
    "Sensor": <string>,  //optional sensor name.
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  }
}

This example demonstrates the Pansharpening function using Landsat 8 data with the Gram-Schmidt method. The image service is published from the Landsat 8 mosaic dataset "$oid"="$band_number".

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{
  "rasterFunction": "Pansharpening",
  "rasterFunctionArguments": {
    "Weights": [
      0.42,
      0.51,
      0.07,
      0
    ],
    "PansharpeningType": 4,
    "PanImage": "$8",
    "MSImage": {
      "rasterFunction": "CompositeBand",
      "rasterFunctionArguments": {
        "Rasters": [
          "$4",
          "$3",
          "$2",
          "$5"
        ]
      }
    },
    "UseFourthBandOfMSAsIR": false
  }
}

ProcessRasterCollection

Introduced at 10.8.1, the ProcessRasterCollection function processes each slice in a multidimensional raster or each item in a mosaic raster using different functions. This function can also aggregate multiple slices into a single slice. For more information including supported operators, see Process Raster Collection function.

This function only works if the service provider is arcobjects11 or arcobjectsrasterrendering.

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{
  "rasterFunction": "ProcessRasterCollection",
  "rasterFunctionArguments": {
    "ItemFunction": <function_template_file>,  // optional, the path to a function template file (.rft.xml) to process each slice or each item in the raster
    "AggregationFunction": <function_template_file>,  // optional, the path to a function template file (.rft.xml) to aggregate multiple slices into a single slice
    "ProcessingFunction": <function_template_file>,  // optional, the path to a function template file (.rft.xml) to process the raster , e.g., add a colormap to render
    "AggregationDefinition": < json >, // optional, used when AggregationFunction is specified. Keys include "definitionType"(Type), "dimension"(Dimension), "intervalKeyword"(Keyword Interval), "intervalValue"(Value Interval), "intervalUnits"(Unit), "minValues"(Minimum Value), "maxValues"(Maximum Value). Allowed values for each key are listed inside [Process Raster Collection function](https://doc.arcgis.com/en/arcgis-online/analyze/process-raster-collection.htm).
    "Raster": <raster>
  }
}

This example demonstrates how to calculate the NDVI for each scene, return the maximum NDVI value across different items, and apply an NDVI color map.

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{
  "rasterFunction": "ProcessRasterCollection",
  "rasterFunctionArguments": {
    "ItemFunction": "/fileShares/rft/NDVI.rft.xml",
    "AggregationFunction": "/fileShares/rft/CellStatisticsMax.rft.xml",
    "AggregationDefinition": {
      "definitionType": "ALL",
      "dimension": "StdTime"
    },
    "ProcessingFunction": "/fileShares/rft/Colormap.rft.xml",
  "Raster":  "$$"
  }
}

This example demonstrates how to calculate the maximum temperature across all time slices.

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{
  "rasterFunction": "ProcessRasterCollection",
  "rasterFunctionArguments": {
    "AggregationFunction": "/fileShares/rft/CellStatisticsMax.rft.xml",
    "AggregationDefinition": {"definitionType":"ALL","dimension":"StdTime"},
    "Raster": "$$"
  }
}

This example demonstrates how to calculate the maximum temperature per year.

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{
  "rasterFunction": "ProcessRasterCollection",
  "rasterFunctionArguments": {
    "AggregationFunction": "/fileShares/rft/CellStatisticsMax.rft.xml",
    "AggregationDefinition": {
      "definitionType": "INTERVAL_KEYWORD",
      "dimension": "StdTime",
      "intervalKeyword": "YEARLY"
    },
    "Raster":  "$$"
  }
}

This example demonstrates how to calculate the maximum temperature within the [2001-01-01T00:00:00, 2008-01-01T00:00:00] range.

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{
  "rasterFunction": "ProcessRasterCollection",
  "rasterFunctionArguments": {
    "AggregationFunction":  "/fileShares/rft/CellStatisticsMax.rft.xml",
    "AggregationDefinition": {
      "definitionType": "INTERVAL_RANGES",
      "dimension": "StdTime",
      "minValues": ["2001-01-01T00:00:00"],
      "maxValues": ["2008-01-01T00:00:00"]
    },
    "Raster": "$$"
  }
}

This example demonstrates how to calculate the maximum temperature every five days.

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{
"rasterFunction": "ProcessRasterCollection",
"rasterFunctionArguments": {
  "AggregationFunction": "/fileShares/rft/CellStatisticsMax.rft.xml",
  "AggregationDefinition": {
    "definitionType": "INTERVAL_VALUE",
    "dimension": "StdTime",
    "intervalValue": 5,
    "intervalUnits": "DAYS"
  },
  "Raster": "$$"
}
}

RasterCalculator

The RasterCalculator function provides access to all existing math functions so you can make calls to them when building expressions. The RasterCalculator function requires single-band inputs. To perform expressions on bands in a multispectral image as part of a function chain, you can use the ExtractBandfunction before the RasterCalculator function. For more information including supported operators, see Calculator function.

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{
  "rasterFunction": "RasterCalculator",
  "rasterFunctionArguments": {
    "InputNames": [  //array of strings for arbitrary raster names
      "raster1_Name",
      "raster2_Name",
      "raster3_Name",
      …
    ],
    "Expression": "raster1_Name + raster2_Name - raster3_Name",  //string, expression to calculate output raster from input rasters
    "ExtentType": <ExtentType>,  //int, optional, default 0; 0=esriExtentFirstOf, 1=esriExtentIntersectionOf, 2=esriExtentUnionOf, 3=esriExtentLastOf
    "CellsizeType": <CellsizeType>,  //int, optional, default 0; 0=esriCellsizeFirstOf, 1=esriCellsizeMinOf, 2=esriCellsizeMaxOf, 3=esriCellsizeMeanOf, 4=esriCellsizeLastOf
    "Rasters": [  //array of rasters
      <raster1>,
      <raster2>,
      <raster3>,
      …
    ],
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "RasterCalculator",
  "rasterFunctionArguments": {
    "InputNames": [
      "a1",
      "name2"
    ],
    "Expression": "a1+name2",
    "ExtentType": 0,
    "CellsizeType": 1,
    "Rasters": [
      "$1",
      "$2"
    ]
  }
}

Recast

The Recast function reassigns argument values in an existing function template. For more information, see Recast function.

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{
  "rasterFunction": "Recast",
  "rasterFunctionArguments": {
    "<ArgumentName1>": <ArgumentValue1>,  //ArgumentName1 will be reassigned with ArgumentValue1
    "<ArgumentName2>": <ArgumentValue2>  //ArgumentName1 will be reassigned with ArgumentValue2
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to view the high vegetation and buildings class of a particular LAS in a mosaic. The following LAS ClassTypes options can be used in REST API with the Recast function:

0: Never Classified
1: Unclassified
2: Ground
3: Low Vegetation
4: Medium Vegetation
5: High Vegetation
6: Building
7: Noisy Low Point
8: Model Key Point
9: Water
10: Rail
11: Road Surface
12: Reserved
13: Wire guard
14: Wire conductor
15: Transmission tower
16: Wire structure connector
17: Bridge deck

18: High noise

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{
  "mosaicMethod": "esriMosaicLockRaster",
  "lockRasterIds": [1],
  "ascending": true,
  "mosaicOperation": "MT_FIRST",
  "itemRenderingRule": {
    "rasterFunction": "Recast",
    "rasterFunctionArguments": {
      "ClassTypes": [5,6]
    }
  }
}

This example demonstrates how to change the z-factor of an existing hillshade function on the first raster in the service.

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{
  "rasterFunction": "Recast",
  "rasterFunctionArguments": {
    "ZFactor": 3.5,
    "Raster": "$1"
  }
}

Remap

The Remap function changes or reclassifies the pixel values of the raster data. For more information, see Remap function.

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{
  "rasterFunction": "Remap",
  "rasterFunctionArguments": {
    "InputRanges": [  //[double, double,…], input ranges are specified in pairs: from (inclusive) and to (exclusive).
      <value1_from>,
      <value1_to>,
      …
    ],
    "OutputValues": [ //[double, …], output values of corresponding input ranges
      <value1>,
      …
    ],
    "GeometryType": <geometryType>,  //added at 10.3
    "Geometries": [  //added at 10.3
      <geometry1>,
      <geometry2>,
      ...
    ],
    "NoDataRanges": [  //[double, double, …], nodata ranges are specified in pairs: from (inclusive) and to (exclusive).
      <nodatavalue1_from>,
      <nodatavalue1_to>,
      …
    ],
    "AllowUnmatched": <true|false>,  //Boolean, specify whether to keep the unmatched values or turn into nodata.
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to remap pixel values.

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{
  "rasterFunction": "Remap",
  "rasterFunctionArguments": {
    "InputRanges": [
      0,
      100,
      101,
      200
    ],
    "OutputValues": [
      5,
      125
    ]
  },
  "variableName": "Raster"
}

This example demonstrates how to use the Remap function with geometry values

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{
  "rasterFunction": "Remap",
  "rasterFunctionArguments": {
    "InputRanges": [50, 51],
    "OutputValues": [71],
    "GeometryType": "esriGeometryEnvelope",
    "Geometries": [
      {
        "spatialReference": {
          "wkid": 2264
        },
        "rings": [
          [
            [1432285, 529578],
            [1436048, 529578],
            [1434048, 531578],
            [1433285, 533205],
            [1432285, 529578]
          ]
        ]
      }
    ]
  }
}

Resample

The Resample function resamples pixel values from a given resolution. For more information, see Resample function.

Use this function only if the workflow has specific computing requirements, such as computing average wind magnitude-direction. Resampling from a designated resolution can be much slower than the default behavior (nearest resolution). In most cases, using the interpolation parameter in the Export Image operation is sufficient.

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{
  "rasterFunction": "Resample",
  "rasterFunctionArguments": {
    "ResamplingType": <ResamplingType>,  //0=NearestNeighbor, 1=Bilinear, 2=Cubic, 3=Majority, 4=BilinearInterpolationPlus, 5=BilinearGaussBlur, 6=BilinearGaussBlurPlus, 7=Average, 8=Minimum, 9=Maximum, 10=VectorAverage (require two bands)
    "InputCellsize": <InputCellsize>  //point that defines cellsize in source spatial reference
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to resample a wind magnitude-direction raster using vector average from base resolution.

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{
  "rasterFunction": "Resample",
  "rasterFunctionArguments": {
    "ResamplingType": 10,
    "InputCellsize": {
      "x": 0.125,
      "y": 0.125
    }
  }
}

SegmentMeanShift

The SegmentMeanShift function produces a segmented output. Pixel values in the output image represent the converged RGB colors of the segment. The input raster must be a three-band 8-bit image. If the image service is not a three-band 8-bit unsigned image, you can use the Stretch function before the SegmentMeanShift function. For more information, see Segment Mean Shift function.

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{
  "rasterFunction": "SegmentMeanShift",
  "rasterFunctionArguments": {
    "SpectralDetail": <SpectralDetail>,  //double 0-21. Bigger value is faster and has more segments.
    "SpatialDetail": <SpatialDetail>,  //int 0-21. Bigger value is faster and has more segments.
    "SpectralRadius": <MaxValue>,  //double. Bigger value is slower and has less segments.
    "SpatialRadius": <MaxValue>,  //int. Bigger value is slower and has less segments.
    "MinNumPixelsPerSegment": <MinNumPixelsPerSegment>,  //int
    "Raster": <Raster>  //the raster to be segmented. optional, default is the service.
  },
  "outputPixelType": "<outputPixelType>",  //optional
}

This example demonstrates how to segment an image.

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{
  "rasterFunction": "SegmentMeanShift",
  "rasterFunctionArguments": {
    "SpectralDetail": 15.5,
    "SpatialDetail": 15,
    "MinNumPixelsPerSegment": 20,
    "Raster": "$$"
  }
}

ShadedRelief

The ShadedRelief function creates a color 3D model of the terrain by merging the images from the elevation-coded and hillshade methods. For more information, see Shaded Relief function. You can specify a colormap or colorramp value to render the shaded relief results. For more predefined color ramps, see the colorrampname parameter in the colormap raster function.

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{
  "rasterFunction": "ShadedRelief",
  "rasterFunctionArguments": {
    "HillshadeType": <HillshadeType>,  //new at 10.8.1. 0=Traditional, 1=Multidirectional. Default is 0.
    "Azimuth": <Azimuth>,  //double (e.g. 215.0)
    "Altitude": <Altitude>,  //double (e.g. 75.0)
    "ZFactor": <ZFactor>,  //double (e.g. 0.3)
    "Colormap": [
      [<value1>, <red1>, <green1>, <blue1>],  //[int, int, int, int]
      [<value2>, <red2>, <green2>, <blue2>]
    ],
    "Colorramp": "<Black To White | Yellow To Red | Slope | more…>"
    "SlopeType": <SlopeType>,  //new at 10.2. 1=DEGREE, 2=PERCENTRISE, 3=SCALED. default is 1.
    "PSPower": <PSPower>,  //new at 10.2. double, used together with SCALED slope type
    "PSZFactor": <PSZFactor>,  //new at 10.2. double, used together with SCALED slope type
    "RemoveEdgeEffect": <SlopeType>,  //new at 10.2. boolean, true of false
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to segment an image.

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{
  "rasterFunction": "ShadedRelief",
  "rasterFunctionArguments": {
    "Azimuth": 215.0,
    "Altitude": 75.0,
    "ZFactor": 0.3,
    "Colormap": [
      [1, 255, 0, 0],
      [2, 0, 255, 0],
      [3, 125, 25, 255],
      ...
    ],
    "Raster": <raster>
  },
  "variableName": "Raster"
}

Slope

Slope represents the rate of change of elevation for each pixel. For more information, see Slope function and How Slope works.

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{
  "rasterFunction": "Slope",
  "rasterFunctionArguments": {
    "ZFactor": <ZFactor>  //double (e.g. 0.3)
    "SlopeType": <SlopeType>,  //new at 10.2. 1=DEGREE, 2=PERCENTRISE, 3=SCALED. default is 1.
    "PSPower": <PSPower>,  //new at 10.2. double, used together with SCALED slope type
    "PSZFactor": <PSZFactor>,  //new at 10.2. double, used together with SCALED slope type
    "RemoveEdgeEffect": <RemoveEdgeEffect>  //new at 10.2. boolean, true or false, default is false.
    "DEM": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "DEM"
}

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{
  "rasterFunction": "Slope",
  "rasterFunctionArguments": {
    "ZFactor": 0.3
  }
}

Speckle

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.

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{
  "rasterFunction": "Speckle",
  "rasterFunctionArguments": {
    "FilterType": <int>,  //0=Lee, 1=Enhanced Lee, 2=Frost, 3=Kuan
    "FilterSize": <int>,  //kernel size. 0=3x3, 1=5x5, 2=7x7, 3=9x9, 4=11x11
    "NoiseModel": <int>,  //for Lee filter only. 0: Multiplicative Noise, 1: Additive Noise, 2: Additive and Multiplicative Noise
    "NoiseVar": <double>,  //for Lee filter with NoiseModel 1 or 2 only.
    "AdditiveNoiseMean": <double>  //for lee filter with NoiseModel 2 only.
    "MultiplicativeNoiseMean": <double>,  //for lee filter with NoiseModel 0 or 2 only.
    "NLooks": <int>,  //for Lee, Enhanced Lee, and Kuan filters.
    "DampFactor": <double>,  //for Enhanced Lee and Frost filters.
    "Raster": <raster>
  }
}

This example demonstrates how to despeckle a radar image service with the Lee filter.

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{
  "rasterFunction": "Speckle",
  "rasterFunctionArguments": {
    "FilterType": 0,
    "FilterSize": 4,
    "NoiseModel": 0,
    "MultiplicativeNoiseMean": 1,
    "NLooks": 1,
    "Raster": "$$"
  }
}

SpectralConversion

The SpectralConversion function applies a matrix to a multiband 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 output band. The column and row size of the matrix equals the band count of the input raster. For more information, see Spectral Conversion function.

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{
  "rasterFunction": "SpectralConversion",
  "rasterFunctionArguments": {
    "ConversionMatrix": <array_of_double>,  //a NxN length one-dimension matrix. N=band count.
    "Raster": <raster>  //optional, default is the image service
  }
}

This example demonstrates how to despeckle a radar image service with the Lee filter.

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{
  "rasterfunction": "SpectralConversion",
  "rasterfunctionarguments": {
    "conversionmatrix": [0.3,0.2,0.5,0,1,0,1,0,0],
    "raster": "$$"
  }
}

The following shows how numbers in the conversion matrix will be used:

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Output band_1 = 0.3 * Input_band_1 + 0.2 * Input_band_2 + 0.5 * Input_band_3;
Output band_2 = 0 * Input_band_1 + 1 * Input_band_2 + 0 * Input_band_3;
Output band_3 = 1 * Input_band_1 + 0 * Input_band_2 + 0 * Input_band_3;

SpectralUnmixing

Introduced at 10.8.1, the SpectralUnmixing function classifies subpixels and calculates the fractional abundance of land-cover types for individual pixels. For more information including supported operators, see Linear Spectral Unmixing function.

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{
  "rasterFunction": "SpectralUnmixing",
  "rasterFunctionArguments": {
    "SpectralProfileType": <int>,  //0=using Spectral profile file, value, 1=using training feature
    "SpectralProfileFile": <string>,  //the path to a ECD file or a JSON file. Optional, used when SpectralProfileType is 0.
    "TrainingFeature": <string>,  //the path to a training feature dataset. used when SpectralProfileType is 1.
    "SpectralProfileDefinition": <json>,  //a json object that defines the spectral profile parameters.
    "NonNegative": <bool>,  //constrains the outputs to be non-negative. Default: False
    "SumToOne": <bool>,  //constrains the outputs to sum to one. Default: False
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to use the SpectralUnmixing function with the SpectralProfile definition for linear spectral unmixing.

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{
  "rasterFunction": "SpectralUnmixing",
  "rasterFunctionArguments": {
    "NonNegative": true,
    "SumToOne": true,
    "Raster": "$$",
    "SpectralProfileDefinition": {
      "EsriClassifierDefinitionFile": 0,
      "FileVersion": 3,
      "NumberDefinitions": 1,
      "Definitions": [
        {
          "Classifier": "MaximumLikelihood",
          "NumberClasses": 2,
          "RasterIsSegmented": false,
          "NumberBands": 3,
          "Classes": [
            {
              "ClassValue": 1,
              "ClassName": "Vegetation",
              "Red": 230,
              "Green": 0,
              "Blue": 0,
              "Count": 546,
              "Means": [
                244.9359,
                14.88278,
                15.21978
              ],
              "Covariances": [
                [
                  10.26146,
                  0.1390063,
                  0.1074951
                ],
                [
                  0.1390063,
                  10.31593,
                  1.207584E-04
                ],
                [
                  0.1074951,
                  1.207584E-04,
                  10.19345
                ]
              ]
            },
            {
              "ClassValue": 2,
              "ClassName": "Water",
              "Red": 0,
              "Green": 77,
              "Blue": 168,
              "Count": 716,
              "Means": [
                15.05587,
                15.01257,
                244.9567
              ],
              "Covariances": [
                [
                  10.18124,
                  0.1152196,
                  0.2789551
                ],
                [
                  0.1152196,
                  10.02638,
                  -0.3583943
                ],
                [
                  0.2789551,
                  -0.3583943,
                  110.11684
                ]
              ]
            }
          ]
        }
      ]
    }
  }
}

Statistics

The Statistics function calculates focal statistics for each pixel of an image based on a defined focal neighborhood. For more information, see Statistics function.

Two syntax formtas are supported:

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{
  "rasterFunction": "Statistics",
  "rasterFunctionArguments": {
    "Type": "<Min | Max | Mean | StandardDeviation>",
    "KernelColumns": <KernelColumns>,  //int (e.g. 3)
    "KernelRows": <KernelRows>  //int (e.g. 3)
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
"rasterFunction": "Statistics",
"rasterFunctionArguments": {
  "Type": <Type>,  //int 1=Min, 2=Max, 3=Mean, 4=StandardDeviation
  "Columns": <Columns>,  //int (e.g. 3)
  "Rows": <Rows>,  //int (e.g. 3)
  "FillNoDataOnly": <fillNoDataOnly>,  //bool
  "Raster": <raster>  //optional, default is the image service
},
"outputPixelType": "<outputPixelType>",  //optional
"variableName": "Raster"
}

This example demonstrates how to use the SpectralUnmixing function with the SpectralProfile definition for linear spectral unmixing.

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{
  "rasterFunction": "Statistics",
  "rasterFunctionArguments": {
    "Type": "Mean",
    "KernelColumns": 3,
    "KernelRows": 3
  },
  "variableName": "Raster"
}

StatisticsHistogram

The StatisticsHistogram function defines the statistics and histogram of a raster. It is typically used to control the default display of an exported image. For more information, see Statistics and Histogram function.

Two syntax formtas are supported:

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{
  "rasterFunction": "StatisticsHistogram",
  "rasterFunctionArguments": {
    "Statistics": <array of statistics objects>,  //predefined statistics for each band
    "Histograms": <array of histogram objects>,  //predefined histograms for each band
    "Raster": <raster>  //optional, default is the image service
  }
}

This example demonstrates how to use the SpectralUnmixing function with the SpectralProfile definition for linear spectral unmixing.

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{
  "rasterFunction": "StatisticsHistogram",
  "rasterFunctionArguments": {
    "statistics": [
      {
        "min": 0,
        "max": 23.064547000000001,
        "mean": 4.547517,
        "standardDeviation": 2.6870280000000002,
        "count": 10000,
        "median": 5,
        "mode": 6
      }
    ],
    "histograms": [
      {
        "size": 256,
        "min": 0,
        "max": 23.064547032777931,
        "counts": [
          559,
          172,
          217,
          ... //256 elements for each of the bins in this example
        ]
      }
    ]
  }
}

Stretch

The Stretch function enhances an image through multiple stretch types. For more information, see Stretch function.

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{
  "rasterFunction": "StatisticsHistogram",
  "rasterFunctionArguments": {
    "statistics": [
      {
        "min": 0,
        "max": 23.064547000000001,
        "mean": 4.547517,
        "standardDeviation": 2.6870280000000002,
        "count": 10000,
        "median": 5,
        "mode": 6
      }
    ],
    "histograms": [
      {
        "size": 256,
        "min": 0,
        "max": 23.064547032777931,
        "counts": [
          559,
          172,
          217,
          ... //256 elements for each of the bins in this example
        ]
      }
    ]
  }
}

The 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 minimum and maximum output . DRA is used to get statistics from the extent in the Export Image operation. ComputeGamma automatically calculates the best gamma value to render an exported image based on the empirical model. Stretch type values and their requirements are as follows:

0 (None)—Does not require other parameters.
3 (StandardDeviation)—Requires NumberOfStandardDeviations, Statistics, or DRA as true.
4 (Histogram Equalization)—Requires the source dataset to have histograms or additional DRA as true.
5 (MinMax)—Requires Statistics or DRA as true.
6 (PercentClip)—Requires MinPercent, MaxPercent, and DRA as true, or histograms from the source dataset.
9 (sigmoid)—Does not require other parameters. Optionally, set SigmoidStrengthLevel (1 to 6) to adjust the curvature of the Sigmoid curve used in color stretch.

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 3,
    "NumberOfStandardDeviations": 2.5,
    "Statistics": [
      [0, 255, 56.7, 54.8],
      [0, 255, 97.5, 94.5],
      [0, 255, 87.5, 87.3]
    ],
    "Min": 100,
    "Max": 255,
    "UseGamma": true,
    "Gamma": [1.25, 1.25, 1.25]
  },
  "outputPixelType": "U8",
  "variableName": "Raster"
}

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 5,
    "Statistics": [
      [50, 200, 56.7, 54.8],
      [50, 200, 97.5, 94.5],
      [50, 200, 87.5, 87.3]
    ],
    "Min": 100,
    "Max": 255,
    "UseGamma": false
  },
  "outputPixelType": "U8",
  "variableName": "Raster"
}

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 6,
    "MinPercent": 0.25,
    "MaxPercent": 0.25,
    "Gamma": [1.25, 1.25, 1.25],
    "DRA": true,
    "Min": 100,
    "Max": 255
  },
  "outputPixelType": "U8",
  "variableName": "Raster"
}

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 0
  },
  "variableName": "Raster"
}

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 4
  },
  "outputPixelType": "U8",
  "variableName": "Raster"
}

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{
  "rasterFunction": "Stretch",
  "rasterFunctionArguments": {
    "StretchType": 9,
    "SigmoidStrengthLevel": 1
  },
  "outputPixelType": "U8",
  "variableName": "Raster"
}

SurfaceParamFunction

Introduced at 11.1, the SurfaceParamFunction function determines parameters of a raster surface such as aspect, slope, and several types of curvatures using geodesic methods. For more information, see How Surface Parameters works in the Spatial Analyst tool help.

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{
  "rasterFunction": "SurfaceParamFunction",
  "rasterFunctionArguments": {
    "SurfaceCalculation": <int> //Optional, 1=Mean curvature, 2=Profile curvature, 3=Tangential curvature, 4=Slope, 5=Aspect, 6=Plan curvature, 7=Contour geodesic torsion, 8=Gaussian curvature, 9=Casorati curvature. Default is 4.
    "LocalSurface": <int>, //Optional, 1=Quadratic, 2=Biquadratic. Default is 1.
    "AnalysisScaleWithUnits": <string >, //Optional. The output will be calculated over this distance from the target cell. Minimum value is the input raster cell size. Default is the input raster cell size and units.
    "UseAdaptiveScale": <boolean>, //Optional. Default is false.
    "ZUnit": <string> //Optional. Default is Meters. Options are: Centimeters, Decimal degrees, Decimeters, Feet, Inches, Kilometers, Meters, Miles, Millimeters, Nautical Miles, Points, Unknown and Yards.
    "SlopeType": <int> //Optional, only applicable when SurfaceCalculation=4. 1=Degree, 2=Percent Rise
    "ProjectAzimuths": <boolean> // Optional, only applicable when SurfaceCalculation=5. Default is false.
    "UseEquatorialAspect": <boolean> //Optional, only applicable when SurfaceCalculation=5.
    “Raster”: <raster>
  },
}

This example demonstrates how to use SurfaceParamFunction to calculate aspect using a window whose size will adapt to the terrain described in the input raster.

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{
  "rasterFunction": "SurfaceParamFunction",
  "rasterFunctionArguments": {
    "SurfaceCalculation":5,
    "AnalysisScaleWithUnits": "1 Meters",
    "UseAdaptiveScale":true,
    "Raster": "$$"
  },
}

TasseledCap

The TasseledCap function analyzes and maps 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 an 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. Before applying this function, confirm that there are no functions in the function chain that would alter the pixel values, such as the Stretch, Apparent Reflectance, or Pansharpening functions. The only exception is when using Landsat ETM+: the Apparent Reflectance function must precede the TasseledCapfunction. For more information, see Tasseled Cap function.

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{
  "rasterFunction": "TasseledCap",
  "rasterFunctionArguments": {
    "Raster": <raster>  //optional, default is the image service
  }
}

Threshold

The binary Threshold function produces the binary image. It uses the Otsu method and the input image is assumed to have a bimodal histogram. For more information, see Binary Thresholding function.

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{
"rasterFunction": "Threshold",
"rasterFunctionArguments": {
  "ThresholdType": <ThresholdType>,  //int 1=Otsu
  "Raster": <raster>  //optional, default is the image service
},
"outputPixelType": "<outputPixelType>",  //optional
"variableName": "Raster"
}

This example demonstrates the Otsu threshold.

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{
  "rasterFunction": "Threshold",
  "rasterFunctionArguments": {
    "ThresholdType": 1,
    "Raster": "$$"
  }
}

TransposeBits

The TransposeBits function performs a bit operation. It extracts bit values from the source data and assigns them to new bits in the output data. For more information, see Transpose Bits function.

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{
  "rasterFunction": "TransposeBits",
  "rasterFunctionArguments": {
    "InputBitPositions": <InputBitPositions>,  //array of long, required
    "OutputBitPositions": <DirectionBandID>,  //array of long, required
    "ConstantFillCheck": <true | false>,  //bool, optional
    "ConstantFillValue": <ConstantFillValue>,  //int, required
    "Raster": <Raster>,  //optional, the input raster to be transposed, default is the service "$$"
    "FillRaster": <size>  //optional, the fill raster
  },
  "outputPixelType": "<outputPixelType>"  //optional
}

If ConstantFillCheck is false, it is assumed there is an input FillRaster value. If an input FillRaster value is not provided, ConstantFillCheck reverts to true and checks for a ConstantFillValue value. Filling is used to initialize pixel values of the output raster.

Landsat 8 has a quality assessment band. The following are example input and output bit positions to extract confidence levels by mapping them to 0-3:

Landsat 8 Water:

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{"InputBitPositions":[4,5],"OutputBitPositions":[0,1]}

Landsat 8 Cloud Shadow:

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{"InputBitPositions":[6,7],"OutputBitPositions":[0,1]}

Landsat 8 Vegetation:

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{"InputBitPositions":[8,9],"OutputBitPositions":[0,1]}

Landsat 8 Snow/Ice:

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{"InputBitPositions":[10,11],"OutputBitPositions":[0,1]}

Landsat 8 Cirrus:

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{"InputBitPositions":[12,13],"OutputBitPositions":[0,1]}

Landsat 8 Cloud:

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{"InputBitPositions":[14,15],"OutputBitPositions":[0,1]}

Landsat 8 Designated Fill:

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{"InputBitPositions":[0],"OutputBitPositions":[0]}

Landsat 8 Dropped Frame:

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{"InputBitPositions":[1],"OutputBitPositions":[0]}

Landsat 8 Terrain Occlusion:

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{"InputBitPositions":[2],"OutputBitPositions":[0]}

This example demonstrates how to extract Landsat 8 Snow/Ice confidence levels.

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{
  "rasterFunction": "TransposeBits",
  "rasterFunctionArguments": {
    "InputBitPositions": [10,11],
    "OutputBitPositions": [0,1],
    "ConstantFillValue": 0,
    "Raster": "$$",
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "U8",
}

This example demonstrates how to extract Landsat 8 Cirrus confidence levels and map to different colors for visualization.

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{
  "rasterFunction": "Colormap",
  "rasterFunctionArguments": {
    "Colormap": [
      [0,255,0,0],
      [1,0,255,0],
      [2,0,0,255],
      [3,255,255,0]
    ],
    "Raster": {
        "rasterFunction": "TransposeBits",
      "rasterFunctionArguments": {
        "InputBitPositions": [12,13],
        "OutputBitPositions": [0,1],
        "ConstantFillValue": 0
      }
    }
  }
}

Trend

Introduced at 10.8.1, the Trend function computes a forecasted multidimensional raster layer using the output trend raster from the Generate Trend function or Generate Trend Raster geoprocessing tool.

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{
  "rasterFunction": "Trend",
  "rasterFunctionArguments": {
    "DimensionDefinitionType": <int>,  // 0 means by value, 1 means by interval
    "DimensionValues": <string>,  // optional. used when DimensionDefinitionType is 0. Multiple dimension values are separated by semicolon, e.g., "0;-2" or "1990-01-01T00:00:00;1990-01-02T00:00:00"
    "DimensionStart": <string>,  //optional. used when DimensionDefinitionType is 1. Defines the start of the dimension interval, e.g., "-10" or "1990-01-01T00:00:00"
    "DimensionEnd": <string>,  //optional. used when DimensionDefinitionType is 1. Defines the end of the dimension interval, e.g., "0" or "1991-01-01T00:00:00"
    "DimensionInterval": <int>,  //optional. used when DimensionDefinitionType is 1. Defines the step of each interval
    "DimensionUnit": <string>,  //optional. Used when DimensionDefinitionType is 1 and the dimension along which the trend is calculated is time related. Its value is one of the following: "YEARS", "MONTHS", "WEEKS", "DAYS", "HOURS".
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

This example demonstrates how to predict the values at DimensionValues 0, -2, and -4.

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{
  "rasterFunction": "Trend",
  "rasterFunctionArguments": {
    "DimensionDefinitionType":  0,
    "DimensionValues": "0;-2;-4",
    "Raster": "$$"
  }
}

This example demonstrates how to extract Landsat 8 Cirrus confidence levels and map to different colors for visualization.

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{
  "rasterFunction": "Trend",
  "rasterFunctionArguments": {
    "DimensionDefinitionType": 1,
    "DimensionStart": "1990-01-01T00:00:00",
    "DimensionEnd": "1990-12-31T00:00:00",
    "DimensionInterval": 1,
    "DimensionUnit": "MONTHS",
    "Raster": "$$"
  }
}

TrendAnalysis

Introduced at 10.8.1, the TrendAnalysis function estimates the trend for each pixel along a dimension for one or more variables in a multidimensional raster.

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{
  "rasterFunction": "TrendAnalysis",
  "rasterFunctionArguments": {
    "DimensionName": <string>,  //the name of the dimension, along which the trend analysis is performed. e.g., "StdTime", "StdZ", etc.
    "RegressionType": <int>,  //0=Linear (Default), 1=Harmonic, 2=Polynomial
    "Frequency": <int>,  //optional. Used when RegressionType = 1 (Harmonic). Default value of Frequency is 1, means that the seasonal pattern repeats once per year
    "Order": <int>,  //optional. Used when RegressionType = 2 (Polynomial). Default value of Order is 2, means 2nd order polynomial regression
    "IgnoreNoData": <bool>,  //optional. Default value is True, which means only cells that are not noData value will be used in fitting the trend curve
    "Raster": <raster>  //optional, default is the image service
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

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{
  "rasterFunction": "TrendAnalysis",
  "rasterFunctionArguments": {
    "DimensionName": "StdTime",
    "RegressionType": 0,
    "Raster": "$$"
  }
}

This example demonstrates how to extract Landsat 8 Cirrus confidence levels and map to different colors for visualization.

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{
  "rasterFunction": "TrendAnalysis",
  "rasterFunctionArguments": {
    "DimensionName": "StdTime",
    "RegressionType": 1,
    "Frequency": 2,
    "Raster": "$$"
  }
}

This example demonstrates how to extract Landsat 8 Cirrus confidence levels and map to different colors for visualization.

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{
  "rasterFunction": "TrendAnalysis",
  "rasterFunctionArguments": {
    "DimensionName": "StdZ",
    "RegressionType": 2,
    "Order": 3,
    "Raster": "$$"
  }
}

TrendToRGB

Introduced at 10.8.1, the TrendToRGB function converts a trend raster to a three-band (red, green, and blue) raster. For more information, see Trend to RGB function.

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{
  "rasterFunction": "TrendToRGB",
  "rasterFunctionArguments": {
    "Raster": <Raster>,  //the input raster
    "ModelType": <ModelType>  //int, 0 = linear,1 = harmonic
  }
}

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{
  "rasterFunction": "TrendToRGB",
  "rasterFunctionArguments": {
    "Raster": "$$",
    "ModelType": 0
  }
}

UnitConversion

The UnitConversion function performs unit conversions. For more information, see Unit Conversion function.

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{
  "rasterFunction": "UnitConversion",
  "rasterFunctionArguments": {
    "FromUnit": <FromUnit>,  //units constant listed below (int)
    "ToUnit": <ToUnit>,  //units constant listed below (int)
    "Raster": <Raster>,  //the input raster, default is the service "$$"
  },
  "outputPixelType": "<outputPixelType>",  //optional
}

FromUnit and ToUnit take the following:

Speed units:
- 100: esriMetersPerSecond
- 101: esriKilometersPerHour
- 102: esriKnots
- 103: esriFeetPerSecond
- 104: esriMilesPerHour
Temperature units:
- 200: esriCelsius
- 201: esriFahrenheit
- 202: esriKelvin
Distance units
- 1: esriInches
- 2: esriPoints
- 3: esriFeet
- 4: esriYards
- 5: esriMiles
- 6: esriNauticalMiles
- 7: esriMillimeters
- 8: esriCentimeters
- 9: esriMeters
- 10: esriKilometers
- 11: esriDecimalDegrees
- 12: esriDecimeters

This example demonstrates how to convert pixel values from feet to meters.

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{
  "rasterFunction": "UnitConversion",
  "rasterFunctionArguments": {
    "FromUnit": 3,
    "ToUnit": 9,
    "Raster": "$$"
  },
  "outputPixelType": "U8",
}

VectorField

The VectorField function composites and converts 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). The data combination type (U-V or Magnitude-Direction) can also be converted interchangeably with this function. For more information, see Vector Field function.

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{
  "rasterFunction": "VectorField",
  "rasterFunctionArguments": {
    "Raster1": <raster>,  //raster item representing “U” or “Magnitude”
    "Raster2": <raster>,  //raster item representing “V” or “Direction”
    "InputDataType": <string>,  //”Vector-UV” or “Vector-MagDir” per input used in “Raster1” and “Raster2”
    "AngleReferenceSystem": <int>,  //optional when “InputDataType” is “Vector-UV”. 0: Geographic; 1: Arithmetic
    "OutputDataType": <string>,  //”Vector-UV” or “Vector-MagDir”
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  }
}

This example demonstrates how to perform a vector field data composite and a conversion from two single-band Magnitude and Direction rasters into one U-V two-band raster.

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{
  "rasterFunction": "VectorField",
  "rasterFunctionArguments": {
    "Raster1": "$1",
    "Raster2": "$2",
    "AngleReferenceSystem": 0,
    "InputDataType": "Vector-MagDir",
    "OutputDataType": "Vector-UV"
  }
}

VectorFieldRenderer

The VectorFieldRenderer function symbolizes a U-V or Magnitude-Direction raster.

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{
  "rasterFunction": "VectorFieldRenderer",
  "rasterFunctionArguments": {
    "MagnitudeBandID": <MagnitudeBandID>,
    "DirectionBandID": <DirectionBandID>,
    "IsUVComponents": <true | false>,  //bool
    "ReferenceSystem": <ReferenceSystem>,  //int 1=Arithmetic, 2= Angular
    "MassFlowAngleRepresentation": <representation>,  //int 0=from 1 =to
    "SymbolTileSize": <size>,
    "SymbolTileSizeUnits": <units>,
    "CalculationMethod": "<CalculationMethod>"  //"Vector Average", "Nearest neighbor", "Bilinear", "Cubic", "Minimum", "Maximum" |
    "SymbologyName": "<SymbologyName>",  //"Simple Scalar", "Single Arrow", "Wind Barb", "Beaufort Wind (Knots)", "Beaufort Wind (MetersPerSecond)", "Ocean Current (Knots)", "Ocean Current (MetersPerSecond)." |
    "MinimumMagnitude": <MinimumMagnitude>,
    "MaximumMagnitude": <MaximumMagnitude>,
    "MinimumSymbolSize": <MinimumSymbolSize>,
    "MaximumSymbolSize": <MaximumSymbolSize>
  },

  "variableName": "Raster"
}

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{
  "rasterFunction": "VectorFieldRenderer",
  "rasterFunctionArguments": {
    "MagnitudeBandID": 0,
    "DirectionBandID": 1,
    "IsUVComponents": true,
    "ReferenceSystem": 1,
    "MassFlowAngleRepresentation": 0,
    "SymbolTileSize": 50,
    "SymbolTileSizeUnits": 100,
    "CalculationMethod": "Vector Average",
    "SymbologyName": "Single Arrow",
    "MinimumMagnitude": 1,
    "MaximumMagnitude": -1,
    "MinimumSymbolSize": 20,
    "MaximumSymbolSize": 80,
    "Raster": <Raster>  //optional
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Raster"
}

WeightedOverlay

The WeightedOverlay function overlays several rasters using a common measurement scale and weight each according to its importance. For more information, see Weighted Overlay function.

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{
  "rasterFunction": "WeightedOverlay",
  "rasterFunctionArguments": {
    "Rasters": [<raster1>,<raster2>,...],  //array of rasters.
    "Fields": ["<field1>","<field2>",...],  //[string, string, ...]
    "Influences": [<influence1>,<influence2>,...],  //[double, double, ...]
    "Remaps": ["<remap1>","<remap2>",...],  //array of strings ["oldVal11 newVal11, oldVal12 newVal12, ...", "oldVal21 newVal21, oldVal22 newVal22, ...", ...]
    "EvalFrom": <evalfrom>,  //required, numeric value of evaluation scale from
    "EvalTo": <evalto>,  //required, numeric value of evaluation scale to
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Rasters"  //optional
}

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{
  "rasterFunction": "WeightedOverlay",
  "rasterFunctionArguments": {
    "Rasters": ["$$","$$","$$"],
    "Fields": ["Value","Value","Value"],
    "Influences": [0.5,0.2,0.3],
    "Remaps": ["0 1, 1 1, 5 5", "1 1, 5 5, 10 NODATA", "0 1, 1 1, 9 9, NODATA -1"],
    "EvalFrom": -1,
    "EvalTo": 9
  }
}

WeightedSum

The WeightedSum function overlays several rasters, multiplies each by their given weight, and adds them together. For more information, see Weighted Sum function.

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{
  "rasterFunction": "WeightedSum",
  "rasterFunctionArguments": {
    "Rasters": [<raster1>,<raster2>,...],  //array of rasters.
    "Fields": ["<field1>","<field2>",...],  //[string, string, ...]
    "Weights": [<weight1>,<weight2>,...],  //[double, double, ...]
    "MatchVariable": <true|false>,  //new at 10.9, boolean, optional, default is true
    "UnionDimension": <true|false>  //new at 10.9, boolean, optional, default is true
  },
  "outputPixelType": "<outputPixelType>",  //optional
  "variableName": "Rasters"  //optional
}

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{
  "rasterFunction": "WeightedSum",
  "rasterFunctionArguments": {
    "Rasters": ["$$","$$","$$"],
    "Fields": ["Value","Value","Value"],
    "Weights": [0.25,0.25,0.5]
  }
}

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{
  "rasterFunction": "WeightedSum",
  "rasterFunctionArguments": {
    "Rasters": ["$$","$$","$$"],
    "Fields": ["Value","Value","Value"],
    "Weights": [0.25,0.25,0.5],
    "MatchVariable": false,
    "UnionDimension": true
  }
}