Constants

The following constants are available for your convenience in writing expressions:

Numbers: Infinity - PI
Text: BackwardSlash - DoubleQuote - ForwardSlash - NewLine - SingleQuote - Tab

Infinity

Represents a value greater than any other number. -Infinity may also be used as a value smaller than any number.

Example

Calculates the maximum of four field values

var values = [ $feature.field1, $feature.field2, $feature.field3, $feature.field4 ];

var max = -Infinity;

for(var i in values){

  max = IIF(values[i] > max, values[i], max);

return max;

PI

The value of a circle's circumference divided by its diameter, approximately 3.14159.

Example

Returns the area of a circle feature

var r = $feature.radius;

PI * r * r;

TextFormatting.BackwardSlash

Inserts a backslash character \ into the text.

Example

Returns '\\serverName\foo\bar'

TextFormatting.BackwardSlash + TextFormatting.BackwardSlash + $feature.FILE_PATH

TextFormatting.DoubleQuote

Inserts a double quote character " into the text.

Example

Returns 'Nicholas "Nick" Anderson'

$feature.NAME + " " + TextFormatting.DoubleQuote + $feature.ALIAS + TextFormatting.DoubleQuote + " " + $feature.SURNAME

TextFormatting.ForwardSlash

Inserts a forward slash character / into the text.

Example

Returns '151/low'

$feature.POP_DENSITY + TextFormatting.ForwardSlash + $feature.CLASS

TextFormatting.NewLine

Inserts a new line, or line break, into the text. Multi-line labels are NOT supported in the ArcGIS API 3.x for JavaScript nor in the ArcGIS Online map viewer.

Example

Returns "T2N R1W"

"T" + $feature.TOWNSHIP + TextFormatting.NewLine + "R" + $feature.RANGE

TextFormatting.SingleQuote

Inserts a single quote character ' into the text.

Example

Returns "Nicholas 'Nick' Anderson"

$feature.NAME + " " + TextFormatting.SingleQuote + $feature.ALIAS + TextFormatting.SingleQuote + " " + $feature.SURNAME

TextFormatting.Tab

Inserts a tab into the text.

Example

Returns "T2N R1W"

"T" + $feature.TOWNSHIP + TextFormatting.Tab + "R" + $feature.RANGE

Logical Functions

These functions provide convenient one-line methods for evaluating expressions. They include methods for checking for empty values, using if-else logic, and implementing switch-case statements among others.

Boolean

Boolean( value ) -> returns: Boolean

Attempts to convert the given non-boolean value to a boolean value. For example a string 'true' would become true.

Name	Type	Description
value	Text \| Number	A text or number value to be converted to a boolean.

Returns: Boolean

Example

// returns `true`

Boolean('true')

// returns `false`. A value of 1 would return `true`

Boolean(0)

// returns `false`

Boolean('hello')

Decode

Decode( expression, [compare1, return1, ...compareN, returnN]?, default? ) -> returns: *

Evaluates an expression to a value and compares the result value with the value of subsequent parameters. If the expression evaluates to a matching value, it returns the subsequent parameter value. If no matches are found, then a default value may be provided. This is similar to a switch/case statement

Name	Type	Description
expression	*	An Arcade expression that must evaluate to a value that can be compared with the provided case values.
[compare1, return1, ...compareN, returnN]	*	optional A set of compare values and return value pairs.
default	*	optional A default value to return if none of the compare values match. This may be a value of any type.

Returns:

Type	Description
*	Returns the matched return value. If no matches are found, then the default value is returned.

Example

// returns a meaningful value when a field contains coded values

var code = $feature.codedValue;

var decodedValue = Decode(code, 1, 'Residential', 2, 'Commercial', 3, 'Mixed', 'Other');

DefaultValue

DefaultValue( value, defaultValue? ) -> returns: *

Replaces an empty value with a provided default value.

Name	Type	Description
value	*	The input value to compare against null or ''. This may be a value of any type. However, if this value is an empty array, then the empty array will be returned.
defaultValue	*	optional Return this value if the provided value is empty. This may be a value of any type.

Returns:

Type	Description
*	If value is empty, then the defaultValue is returned. Otherwise, the value of value is returned. This may be a value of any type.

Example

// If a feature has no value in the POP_2000 field

// then 'no data' is returned

DefaultValue($feature.POP_2000, 'no data')

IIf

IIf( condition, trueValue, falseValue ) -> returns: *

Returns a given value if a conditional expression evaluates to true, and returns an alternate value if that condition evaluates to false.

Name	Type	Description
condition	Boolean	A logical expression that must evaluate to true or false.
trueValue	*	The value to return if the condition evaluates to true. This may be a value of any type.
falseValue	*	The value to return if the condition evaluates to false. This may be a value of any type.

Returns:

Type	Description
*	If condition is true, then the trueValue is returned. Otherwise, the value of falseValue is returned.

Example

// returns 'below' if the value is less than 1,000,000.

// if the value is more than 1,000,000, then returns 'above'

var population = $feature.POP_2007;

IIf(population < 1000000, 'below', 'above');

IsEmpty

IsEmpty( value ) -> returns: Boolean

Returns true if the provided value is null or an empty string (e.g. ''). Returns false for all other cases, including empty arrays and dictionaries.

Name	Type	Description
value	*	The value that is compared against null or ''. This may be a value of any type.

Returns: Boolean

Example

// Returns true

IsEmpty(null)

// Returns false

IsEmpty('hello world')

When

When( [expr1, result1, ...exprN, resultN], default ) -> returns: *

Evaluates a series of conditional expressions until one evaluates to true.

Name	Type	Description
[expr1, result1, ...exprN, resultN]	*	A series of conditional expressions and return values if the given expression evaluates to true. This may be a value of any type.
default	*	Returns this value if all expressions evaluate to false. This may be a value of any type.

Returns: *

Example

Reclassify a numeric field value to a generic ranking (string)

If all expressions are false, then 'n/a' is returned

var density = $feature.densityField;

var ranking = When(density < 50, 'low', density >=50 && density < 100, 'medium', density >= 100, 'high', 'n/a');

Geometry Functions

Since Arcade expressions execute for each feature, using multiple geometry operations within the context of the labeling and visualization profiles can be expensive and severely impact the performance of the application. Also note that geometries fetched from feature services, especially polylines and polygons, are generalized according to the view's scale resolution. Be aware that using a feature's geometry (i.e. $feature) as input to any geometry function will yield results only as precise as the view scale. Therefore, results returned from geometry operations in the visualization and labeling profiles may be different at each scale level. Use these functions at your discretion within these contexts.

The following functions allow you to create and evaluate geometry objects. For convenience, you may pass a Feature object (e.g. $feature) as input to any of these methods, and the feature will internally cast as a geometry. These functions are grouped into the following categories:

Create geometries

Geometry() - Extent() - MultiPartToSinglePart() - Multipoint() - Point() - Polyline() - Polygon() - SetGeometry()

Measurement

Area() - AreaGeodetic() - Centroid() - Length() - LengthGeodetic()

Topological relationship testing

Contains() - Crosses() - Disjoint() - Equals() - Intersects() - Overlaps() - Touches() - Within()

Overlay

Clip() - Cut() - Difference() - Intersection() - SymmetricDifference() - Union()

Proximity

Buffer() - BufferGeodetic() - Distance()

Units reference

If a function references units, then any of the values described in the table below may be used. Units can either be identified as a number or a string. If the value is a number, it will be based on the standard referenced here. Where appropriate, linear and areal units may be used interchangeably. For example, if calculating an area and meters is specified as the unit, then the unit will be treated as square-meters and vice versa.

Unit value	Alternate values
*acres	acre, ac
feet	foot, ft, square-feet, square-foot, squarefeet, squarefoot
*hectares	hectare, ha
kilometers	kilometer, km, square-kilometers, square-kilometer, squarekilometers, squarekilometer
miles	mile, square-miles, square-mile, squaremiles, squaremile
meters	meter, m, square-meters, square-meter, squaremeters, squaremeter
yards	yard, yd, square-yards, square-yard, squareyards, squareyard

* Indicates the unit may only be used for calculating areas.

Area

Area( geometry, unit? ) -> returns: Number

Since version 1.3

Returns the area of the input geometry in the given units. This is a planar measurement using Cartesian mathematics.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Polygon \| Feature	The Polygon or Extent geometry for which to calculate the planar area.
unit	Text \| Number	optional Measurement unit of the return value. Use one of the string values listed in the Units reference or any of the numeric codes for area units.

Returns: Number

Example

Returns the area of the feature in square meters

Area($feature, 'square-meters')

AreaGeodetic

AreaGeodetic( geometry, unit? ) -> returns: Number

Since version 1.3

Returns the geodetic area of the input geometry in the given units. This is more reliable measurement of area than Area() because it takes into account the Earth's curvature. Support is limited to geometries with a Web Mercator (wkid 3857) or a WGS 84 (wkid 4326) spatial reference.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Polygon \| Feature	The Polygon or Extent geometry for which to calculate the planar area.
unit	Text \| Number	optional Measurement unit of the return value. Use one of the string values listed in the Units reference or any of the numeric codes for area units.

Returns: Number

Example

Returns the geodetic area of the feature in square meters

AreaGeodetic($feature, 'square-meters')

Buffer

Buffer( geometry, distance, unit? ) -> returns: Polygon

Since version 1.3

Returns the planar (or Euclidean) buffer at a specified distance around the input geometry. This is a planar measurement using Cartesian mathematics.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The geometry to buffer.
distance	Number	The distance to buffer from the geometry.
unit	Text \| Number	optional Measurement unit of the buffer distance. Use one of the string values listed in the Units reference or any of the numeric codes.

Returns: Polygon

Example

Returns a polygon representing a 1/2-mile buffer around the input geometry

Buffer($feature, 0.5, 'miles')

BufferGeodetic

BufferGeodetic( geometry, distance, unit? ) -> returns: Polygon

Since version 1.3

Returns the geodetic buffer at a specified distance around the input geometry. This is a geodesic measurement, which calculates distances on an ellipsoid. Support is limited to geometries with a Web Mercator (wkid 3857) or a WGS 84 (wkid 4326) spatial reference.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The geometry to buffer.
distance	Number	The distance to buffer from the geometry.
unit	Text \| Number	optional Measurement unit of the buffer distance. Use one of the string values listed in the Units reference or any of the numeric codes.

Returns: Polygon

Example

Returns a polygon representing a 1/2-mile buffer around the input geometry

BufferGeodetic($feature, 0.5, 'miles')

Centroid

Centroid( geometry ) -> returns: Point

Since version 1.3

Returns the centroid of the input geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Polygon \| Feature	The polygon or feature for which to calculate the centroid.

Returns: Point

Example

Returns the centroid of the given polygon

Centroid($feature)

Clip

Clip( geometry, envelope ) -> returns: Geometry

Since version 1.3

Calculates the clipped geometry from a target geometry by an envelope.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The geometry to be clipped.
envelope	Extent	The envelope used to clip the geometry.

Returns: Geometry

Example

Returns the area of the clipped geometry

var envelope = Extent({ ... });

Area(Clip($feature, envelope), 'square-miles');

Contains

Contains( containerGeometry, insideGeometry ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry contains another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
containerGeometry	Geometry \| Feature \| FeatureSet	The geometry that is tested for the 'contains' relationship to insideGeometry. Think of this geometry as the potential 'container' of the insideGeometry. In profiles that support accessing data, this can be a FeatureSet.
insideGeometry	Geometry \| Feature	The geometry that is tested for the 'within' relationship to the containerGeometry.

Returns: Boolean | FeatureSet

Example

Returns true if the feature is contained within the given polygon

var container = Polygon({ ... });

Contains(container, $feature);

Returns the number of features that contain the given polygon

var projectArea = Polygon({ ... });

Count(Contains($layer, projectArea));

Crosses

Crosses( geometry1, geometry2 ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry crosses another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature \| FeatureSet	The geometry to cross. In profiles that support accessing data, this can be a FeatureSet.
geometry2	Geometry \| Feature	The geometry being crossed.

Returns: Boolean | FeatureSet

Example

Returns true if the feature crosses the given polygon

var geom2 = Polygon({ ... });

Crosses($feature, geom2);

Returns the number of features in the feature set that cross the given polygon

var geom2 = Polygon({ ... });

Count( Crosses($layer, geom2) );

Cut

Cut( geometry, cutter ) -> returns: Geometry[]

Since version 1.3

Splits the input Polyline or Polygon where it crosses a cutting Polyline. For Polylines, all resulting left cuts are grouped together in the first Geometry. Right cuts and coincident cuts are grouped in the second Geometry. Each undefined cut, along with any uncut parts, are output as separate Polylines.
For Polygons, all resulting left cuts are grouped in the first Polygon, all right cuts are grouped in the second Polygon, and each undefined cut, along with any left-over parts after cutting, are output as a separate Polygon. If no cuts are returned then the array will be empty. An undefined cut will only be produced if a left cut or right cut was produced and there was a part left over after cutting, or a cut is bounded to the left and right of the cutter.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Polyline \| Polygon \| Feature	The geometry to cut.
cutter	Polyline \| Feature	The Polyline used to cut the geometry.

Returns: Geometry[]

Example

Cuts the feature's geometry with the given polyline

var cutter = Polyline({ ... });

Cut($feature, cutter));

Difference

Difference( inputGeometry, subtractor ) -> returns: Geometry

Since version 1.3

Performs the topological difference operation for the two geometries. The resultant geometry comes from inputGeometry, not the subtractor. The dimension of subtractor has to be equal to or greater than that of inputGeometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
inputGeometry	Geometry \| Feature	The input geometry from which to subtract.
subtractor	Geometry \| Feature	The geometry to subtract from inputGeometry.

Returns: Geometry

Example

Subtracts the given polygon area from the feature.

var subtractor = Polygon({ ... });

Difference($feature, subtractor);

Disjoint

Disjoint( geometry1, geometry2 ) -> returns: Boolean

Since version 1.3

Indicates if one geometry is disjoint (doesn't intersect in any way) with another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature	The base geometry that is tested for the 'disjoint' relationship to geometry2.
geometry2	Geometry \| Feature	The comparison geometry that is tested for the 'disjoint' relationship to geometry1.

Returns: Boolean

Example

Returns true if the geometries don't intersect

var geom2 = Polygon({ ... });

Disjoint($feature, geom2);

Distance

Distance( geometry1, geometry2, unit? ) -> returns: Number

Since version 1.3

Returns the planar distance between two geometries in the given units. This is a planar measurement using Cartesian mathematics.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature	The geometry used to measure the distance from geometry2.
geometry2	Geometry \| Feature	The geometry used to measure the distance from geometry1.
unit	Text \| Number	optional Measurement unit of the return value. Use one of the string values listed in the Units reference or any of the numeric codes.

Returns: Number

Example

Returns the distance between two geometries in meters

var geom2 = Point({ ... });

Distance($feature, geom2, 'meters')

Equals

Equals( geometry1, geometry2 ) -> returns: Boolean

Since version 1.3

Indicates if two geometries are equal, or geographically equivalent given the spatial reference and tolerance of the data. The two input geometries don't have to be clones to be considered equal.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature	The first input geometry.
geometry2	Geometry \| Feature	The second input geometry.

Returns: Boolean

Example

Returns true if the geometries are equal

var geom2 = Point({ ... });

Equals($feature, geom2);

Extent

Extent( json ) -> returns: Extent

Constructs an Extent object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for Envelope geometries. This function may also return the extent of an input Polygon, Point, Polyline or Multipoint.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
json	Dictionary \| Geometry	The JSON or Geometry from which to construct the extent geometry object.

Returns: Extent

Example

// Creates an Extent object

var extentJSON = {

'xmin' : -109.55, 'ymin' : 25.76, 'xmax' : -86.39, 'ymax' : 49.94,

'spatialReference' : {'wkid' : 4326}

};

Extent(extentJSON);

// Returns the Extent of the given feature

Extent($feature)

Geometry

Geometry( feature ) -> returns: Geometry

Constructs a Geometry object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for geometries. This function may also return the Geometry of an input feature.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
feature	Feature \| Dictionary	The Feature or JSON from which to construct the geometry object.

Returns: Geometry

Example

Returns the geometry of the feature

Geometry($feature)

Constructs a point geometry. This can be done with any geometry type.

var pointJSON = {'x' : -118.15, 'y' : 33.80, 'spatialReference' : {'wkid' : 4326}};

Geometry(pointJSON);

Intersection

Intersection( geometry1, geometry2 ) -> returns: Geometry

Since version 1.3

Constructs the set-theoretic intersection between two geometries and returns a new geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature	The geometry to intersect with geometry2.
geometry2	Geometry \| Feature	The geometry to intersect with geometry1.

Returns: Geometry

Example

Returns the area common to both polygons

var geom2 = Polygon({ ... });

Area(Intersection($feature, geom2), 'square-miles');

Intersects

Intersects( geometry1, geometry2 ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry intersects another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature \| FeatureSet	The geometry that is tested for the intersects relationship to the other geometry. In profiles that support accessing data, this can be a FeatureSet.
geometry2	Geometry \| Feature	The geometry being intersected.

Returns: Boolean | FeatureSet

Example

Returns true if the geometries intersect

var geom2 = Polygon({ ... });

Intersects($feature, geom2);

Returns the number of features that intersect the polygon

var geom2 = Polygon({ ... });

Count( Intersects($layer, geom2) );

Length

Length( geometry, unit? ) -> returns: Number

Since version 1.3

Returns the length of the input geometry in the given units. This is a planar measurement using Cartesian mathematics.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The geometry for which to calculate the planar length.
unit	Text \| Number	optional Measurement unit of the return value. Use one of the string values listed in the Units reference or any of the numeric codes.

Returns: Number

Example

Returns the planar length of the feature in kilometers

Length($feature, 'kilometers')

LengthGeodetic

LengthGeodetic( geometry, unit? ) -> returns: Number

Since version 1.3

Returns the geodetic length of the input geometry in the given units. This is more reliable measurement of length than Length() because it takes into account the Earth's curvature. Support is limited to geometries with a Web Mercator (wkid 3857) or a WGS 84 (wkid 4326) spatial reference.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The geometry for which to calculate the geodetic length.
unit	Text \| Number	optional Measurement unit of the return value. Use one of the string values listed in the Units reference or any of the numeric codes.

Returns: Number

Example

Returns the geodetic length of the feature in kilometers

LengthGeodetic($feature, 'kilometers')

MultiPartToSinglePart

MultiPartToSinglePart( geometry ) -> returns: Geometry[]

Since version 1.3

Converts a multi-part geometry into separate geometries.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry	Geometry \| Feature	The multi-part geometry to break into single parts.

Returns: Geometry[]

Example

Returns an array of single-part geometries from a multi-part geometry

var allParts = MultiPartToSinglePart($feature)

Multipoint

Multipoint( json ) -> returns: Multipoint

Constructs a Multipoint object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for multipoint geometries.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
json	Dictionary	The JSON from which to construct the multipoint geometry object.

Returns: Multipoint

Example

// Creates a Multipoint object

var multipointJSON = {

'points' : [[-97.06138,32.837],[-97.06133,32.836],[-97.06124,32.834],[-97.06127,32.832]],

'spatialReference' : {'wkid' : 4326}

};

Multipoint(multipointJSON);

Overlaps

Overlaps( geometry1, geometry2 ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry overlaps another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature \| FeatureSet	The base geometry that is tested for the 'overlaps' relationship with geometry2. In profiles that support accessing data, this can be a FeatureSet.
geometry2	Geometry \| Feature	The comparison geometry that is tested for the 'overlaps' relationship with geometry1.

Returns: Boolean | FeatureSet

Example

Returns true if the geometries overlap

var geom2 = Polygon({ ... });

Overlaps($feature, geom2);

Returns the number of features that overlap the polygon

var geom2 = Polygon({ ... });

Count( Overlaps($layer, geom2) );

Point

Point( json ) -> returns: Point

Constructs a Point object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for Point geometries.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
json	Dictionary	The JSON from which to construct the point geometry object.

Returns: Point

Example

// Creates a Point object

var pointJSON = {'x' : -118.15, 'y' : 33.80, 'spatialReference' : {'wkid' : 4326}};

Point(pointJSON)

Polygon

Polygon( json ) -> returns: Polygon

Constructs a Polygon object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for Polygon geometries.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
json	Dictionary	The JSON from which to construct the polygon geometry object.

Returns: Polygon

Example

// Creates a Polygon object

var polygonJSON = {

'rings' : [ [[-97.06138,32.837],[-97.06133,32.836],[-97.06124,32.834],[-97.06127,32.832], [-97.06138,32.837]],[[-97.06326,32.759],[-97.06298,32.755],[-97.06153,32.749], [-97.06326,32.759]] ],

'spatialReference' : {'wkid' : 4326}

};

Polygon(polygonJSON);

Polyline

Polyline( json ) -> returns: Polyline

Constructs a Polyline object from a JSON string or an object literal. The JSON schema must follow the ArcGIS REST API format for Polyline geometries.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
json	Dictionary	The JSON from which to construct the polyline geometry object.

Returns: Polyline

Example

// Creates a Polyline object

var polylineJSON = {

'paths' : [ [[-97.06138,32.837],[-97.06133,32.836],[-97.06124,32.834],[-97.06127,32.832]], [[-97.06326,32.759],[-97.06298,32.755]] ],

'spatialReference' : {'wkid' : 4326}

};

Polyline(polylineJSON);

SetGeometry

SetGeometry( internalFeature, geometry )

Since version 1.3

Sets or replaces a geometry on a user-defined Feature. Note that features referenced as global variables are immutable; their geometries cannot be changed.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
internalFeature	Feature	A feature whose geometry will be updated.
geometry	Geometry	The geometry to set on the input feature.

Example

Sets a new geometry on the feature

var feature = Feature(Point( ... ), 'name', 'buffer centroid');

var buffer = BufferGeodetic(Geometry(feature), 1, 'mile');

SetGeometry(feature, buffer);

SymmetricDifference

SymmetricDifference( leftGeometry, rightGeometry ) -> returns: Geometry

Since version 1.3

Performs the Symmetric difference operation on the two geometries. The symmetric difference includes the parts of both geometries that are not common with each other.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
leftGeometry	Geometry \| Feature	The geometry instance to compare to rightGeometry in the XOR operation.
rightGeometry	Geometry \| Feature	The geometry instance to compare to leftGeometry in the XOR operation.

Returns: Geometry

Example

Returns a polygon representing areas where both inputs do not overlap

var geom2 = Polygon({ ... });

SymmetricDifference($feature, geom2);

Touches

Touches( geometry1, geometry2 ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry touches another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometry1	Geometry \| Feature \| FeatureSet	The geometry to test the 'touches' relationship with geometry2. In profiles that support accessing data, this can be a FeatureSet.
geometry2	Geometry \| Feature	The geometry to test the 'touches' relationship with geometry1.

Returns: Boolean | FeatureSet

Example

Returns true if the geometries touch

var geom2 = Polygon({ ... });

Touches($feature, geom2);

Returns the number of features in the layer that touch the geometry.

var geom = Polygon({ ... });

Count( Touches($layer, geom) );

Union

Union( geometries ) -> returns: Geometry

Since version 1.3

Constructs the set-theoretic union of the geometries in an input array, or list, and returns a single Geometry. All inputs must have the same geometry type and share the same spatial reference.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
geometries	Geometry[] \| Feature[]	An array, or list, of geometries to union into a single geometry. This can be any number of geometries.

Returns: Geometry

Example

Unions geometries passed as an array

var geom2 = Polygon({ ... });

Union([ $feature, geom2 ]);

Unions geometries passed as a list

var geom2 = Polygon({ ... });

var geom3 = Polygon({ ... });

var geom4 = Polygon({ ... });

Union(Geometry($feature), geom2, geom3, geom4);

Within

Within( innerGeometry, outerGeometry ) -> returns: Boolean / FeatureSet

Since version 1.3

Indicates if one geometry is within another geometry.
Be aware that using $feature as input to this function will yield results only as precise as the view's scale resolution. Therefore values returned from expressions using this function may change after zooming between scales. Read more here.

Name	Type	Description
innerGeometry	Geometry \| Feature \| FeatureSet	The base geometry that is tested for the 'within' relationship to outerGeometry. In profiles that support accessing data, this can be a FeatureSet.
outerGeometry	Geometry \| Feature	The comparison geometry that is tested for the 'contains' relationship to innerGeometry.

Returns: Boolean | FeatureSet

Example

Returns true if the feature is within the given polygon

var outerGeom = Polygon({ ... });

Within($feature, outerGeom);

Returns the number of features in the layer within the polygon

var outerGeom = Polygon({ ... });

Count( Within($feature, outerGeom) );

Data Functions

A set of convenient functions for working with and manipulating various types of data values.

Console

Console( message [,obj,text, ...objN,textN] ) -> returns: Text

Logs a message in the messages window for debugging purposes. This function can be especially useful for inspecting variable values within a custom function at runtime. Unlike other functions and the return statement, Console() doesn't actually return a value; rather, it logs messages in a separate window for inspection purposes only. The successful use of this function has no computational impact on the evaluation of the expression.

Name	Type	Description
message [,obj,text, ...objN,textN]	*	A list of variables, messages, or objects to output in the messages window.

Returns: Text

Example

Prints the value of max for each iteration of the loop within the function

// The messages window will log the following:

// 'current item is: 10, but max = 10'

// 'current item is: 0, but max = 10'

// 'current item is: 84, but max = 84'

// 'current item is: 30, but max = 84'

// The expression evaluates to 84

function findMax(yourArray) {

var max = -Infinity;

for (var i in yourArray) {

max = IIf(yourArray[i] > max, yourArray[i], max);

Console('current item is: ' + i + ', but max = ' + max);

}

return max;

}

var myArray = [ 10, 0, 84, 30];

findMax(myArray);

Count

Count( values ) -> returns: Number

Returns the number of items in an array or FeatureSet, or the number of characters in a string.

Name	Type	Description
values	Array \| Text \| FeatureSet	An array or string on which to perform the operation. In profiles that support accessing data, this can be a FeatureSet.

Returns: Number

Example

Returns 6

Count([12,21,32,44,58,63])

Returns 13

Count('Graham County')

Returns the number of features in a layer

Count($layer)

Dictionary

Dictionary( name1, value1, [...nameN, compareN]? ) -> returns: Dictionary

Returns a new dictionary based on the provided arguments. The arguments are name/value pairs. e.g. dictionary('field1',val,'field2',val2,...).

Name	Type	Description
name1	Text	The attribute name.
value1	*	The attribute value.
[...nameN, compareN]	*	optional Ongoing name/value pairs.

Returns: Dictionary

Example

prints 3

var d = Dictionary('field1', 1, 'field2',2)

return d.field1 + d.field2

Distinct

Distinct( values ) -> returns: Array

Since version 1.1

Returns a set of distinct, or unique, values for a given array or list of values.

Name	Type	Description
values	Array	An array or list of values on which to perform the operation.

Returns: Array

Example

Returns [1,2,3,4,5]

Distinct([1,1,2,1,1,2,2,3,4,5])

Returns ['high','medium','low',0]

Distinct('high','medium','low',0,'high','high','low')

DomainCode

DomainCode( feature, fieldName, value, subtype? ) -> returns: Text

Returns the code of an associated a domain description in a feature.

Name	Type	Description
feature	Feature \| FeatureSet	The feature with a field that has a domain. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	The name of the field (not the alias of the field) containing the domain.
value	Text	The value to be converted back into a code. This parameter is required when a FeatureSet is passed to the featureparameter. The returned code comes from the service metadata.
subtype	Text	optional The coded number for the subtype if the feature supports subtyping. If not provided, the current feature's subtype (if it has one), will be used.

Returns: Text

Example

prints the domain description for the field referenced.

DomainCode($feature, 'Enabled', 'True')

DomainName

DomainName( feature, fieldName, code?, subtype? ) -> returns: Text

Returns the descriptive name for a domain code in a feature.

Name	Type	Description
feature	Feature \| FeatureSet	The feature with a field that has a domain. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	The name of the field (not the alias of the field) containing the domain.
code	Text	optional The code associated with the desired descriptive name. If not provided, the field value in the feature will be returned. This parameter is required when a FeatureSet is passed to the feature parameter. The returned code comes from the service metadata.
subtype	Text	optional The coded number of the subtype if the feature supports subtyping. If not provided, the feature's subtype (if it has one) will be used.

Returns: Text

Example

prints the domain description for the referenced field

DomainName($feature, 'fieldName')

Feature

Feature( geometry, name1, value1, [... nameN, valueN]? ) -> returns: Feature

Creates a new feature. Alternatively, it can be called with object notation: Feature({geometry: {}, attributes: {...}}) or with two parameters: Feature(geometry, attributes);.

Name	Type	Description
geometry	Geometry	The geometry of the feature.
name1	Text	The first attribute's name.
value1	Text \| Date \| Number \| Boolean	The first attribute's value.
[... nameN, valueN]	*	optional Ongoing name/value pairs for each attribute in the feature.

Returns: Feature

Example

Feature(pointGeometry, 'city_name', 'Spokane', 'population', 210721)

Create a feature from another feature.

var dict = { hello:10 }

var p = point({x:10, y:20, spatialReference:{wkid:102100}})

var ftr1 = Feature(p,dict)

var ftr2 = Feature(ftr1)

Create a feature from a JSON string.

var JSONString = "{'geometry':{'x':10,'y':20,'spatialReference':{'wkid':102100}},'attributes':{'hello':10}}"

var feature = Feature(JSONString)

FeatureSet

FeatureSet( definition ) -> returns: FeatureSet

Since version 1.5

Profiles: Attribute Rules | Popup | Field Calculate

Creates a new FeatureSet from JSON according to the ArcGIS REST spec. See the snippet below for an example of this.

Name	Type	Description
definition	Text	The JSON describing a set of features. The JSON must be contained in a string.

Returns: FeatureSet

Example

Create a FeatureSet from JSON.

// JSON representation of the feature used in the snippet below

// {

// 'fields': [{

// 'alias': 'RANK',

// 'name': 'RANK',

// 'type': 'esriFieldTypeInteger'

// }, {

// 'alias': 'ELEV_m',

// 'name': 'ELEV_m',

// 'type': 'esriFieldTypeInteger'

// }],

// 'spatialReference': { 'wkid': 4326 },

// 'geometryType': 'esriGeometryPoint',

// 'features': [{

// 'geometry': {

// 'spatialReference': { 'wkid': 4326 },

// 'x': -151.0063,

// 'y': 63.069

// },

// 'attributes': {

// 'RANK': 1,

// 'ELEV_m': 6168

// }

// }]

// };

// The Dictionary representation of the FeatureSet must be a stringified object

var features = FeatureSet('{"fields":[{"alias":"RANK","name":"RANK","type":"esriFieldTypeInteger"},{"alias":"ELEV_m","name":"ELEV_m","type":"esriFieldTypeInteger"}],"spatialReference":{"wkid":4326},"geometryType":"esriGeometryPoint","features":[{"geometry":{"spatialReference":{"wkid":4326},"x":-151.0063,"y":63.069},"attributes":{"RANK":1,"ELEV_m":6168}}]}')

FeatureSetById

FeatureSetById( map, id, fieldList?, includeGeometry? ) -> returns: FeatureSet

Since version 1.5

Profiles: Attribute Rules | Popup | Field Calculate

Creates a FeatureSet from a Feature Layer based on its layer ID within a map or feature service. Limiting the number of fields in the request and excluding the geometry can improve the performance of the script.

Name	Type	Description
map	FeatureSetCollection	The map or feature service containing one or more layers from which to create a FeatureSet. Typically, this value is the $map or $datastore global.
id	Text	The ID of the layer within the given map.
fieldList	Text[]	optional The fields to include in the FeatureSet. By default, all fields are included. To request all fields in the layer, set this value to ['*']. Limiting the number of fields improves the performance of the script.
includeGeometry	Boolean	optional Indicates whether to include the geometry in the features. By default, this is true. For performance reasons, you should only request the geometry if necessary, such as for use in geometry functions.

Returns: FeatureSet

Example

Returns the number of features in the layer with the id DemoLayerWM_1117 in the given map.

var features = FeatureSetById($map,'DemoLayerWM_1117', ['*'], true);

Count( features );

FeatureSetByName

FeatureSetByName( map, title, fieldList?, includeGeometry? ) -> returns: FeatureSet

Since version 1.5

Profiles: Attribute Rules | Popup | Field Calculate

Creates a FeatureSet from a Feature Layer based on its name within a map or feature service. Keep in mind this name is not necessarily unique. It is therefore more appropriate to create a FeatureSet using FeatureSetById(). Limiting the number of fields in the feature set and excluding the geometry can improve the performance of the script.

Name	Type	Description
map	FeatureSetCollection	The map or feature service containing one or more layers from which to create a FeatureSet. Typically, this value is the $map or $datastore global.
title	Text	The title of the layer within the given map.
fieldList	Text[]	optional The fields to include in the FeatureSet. By default, all fields are included. To request all fields in the layer, set this value to ['*']. Limiting the number of fields improves the performance of the script.
includeGeometry	Boolean	optional Indicates whether to include the geometry in the features. By default, this is true. For performance reasons, you should only request the geometry if necessary, such as for use in geometry functions.

Returns: FeatureSet

Example

Returns the number of features in the layer with the title 'Bike routes' in the given map.

var features = FeatureSetByName($map,'Bike routes', ['*'], true);

Count( features );

FeatureSetByPortalItem

FeatureSetByPortalItem( itemId, layerId, fieldList?, includeGeometry? ) -> returns: FeatureSet

Since version 1.5

Profiles: Field Calculate

Creates a FeatureSet from a Feature Layer in a portal item. Limiting the number of fields in the feature set and excluding the geometry can improve the performance of the script.

Name	Type	Description
itemId	Text	The GUID of the portal item referencing a feature layer or feature service.
layerId	Number	The ID of the layer in the feature service.
fieldList	Text[]	optional The fields to include in the FeatureSet. By default, all fields are included. To request all fields in the layer, set this value to ['*']. Limiting the number of fields improves the performance of the script.
includeGeometry	Boolean	optional Indicates whether to include the geometry in the features. For performance reasons, you should only request the geometry if necessary, such as for use in geometry functions.

Returns: FeatureSet

Example

Returns the number of features in the layer with the title 'Bike routes' in the given map.

var features = FeatureSetByPortalItem('7b1fb95ab77f40bf8aa09c8b59045449', 0, ['Name', 'Count'], false);

Count( features );

Filter

Filter( featureSet, filter ) -> returns: FeatureSet

Since version 1.5

Profiles: Attribute Rules | Popup | Field Calculate

Filters a FeatureSet based on a SQL92 expression.

Name	Type	Description
featureSet	FeatureSet	The FeatureSet, or layer, to filter.
filter	Text	The SQL92 expression used to filter features in the layer. This expression can substitute an Arcade variable using the @ character. See the snippet below for an example.

Returns: FeatureSet

Example

Filter features using a SQL92 expression

// Returns all features with a Population greater than 10,000

var result = Filter($layer, 'POPULATION > 10000');

Filter features using a SQL92 expression with a variable substitute

// Returns all features with a Population greater than the dataset average

var averageValue = Average($layer, 'POPULATION')

var result = Filter($layer, 'POPULATION > @averageValue');

First

First( items ) -> returns: *

Returns the first element in an array or FeatureSet.

Name	Type	Description
items	Array	The array from which to return the first feature. In profiles that support accessing data, this can be a FeatureSet.

Returns: *

Example

prints 'orange'

First(['orange', 'purple', 'gray'])

returns the area of the first feature in the layer.

Area( First($layer) )

Guid

Guid( format? ) -> returns: Text

Since version 1.3

Returns a random GUID as a string.

Name	Type	Description
format	Text	optional An named format for the GUID. The default value is digits-hyphen-braces. Possible Values: digits / digits-hyphen / digits-hyphen-braces / digits-hyphen-parentheses

Returns: Text

Example

Returns a value similar to {db894515-ed21-4df1-af67-36232256f59a}

Guid()

Returns a value similar to d00cf4dffb184caeb8ed105b2228c247

Guid('digits')

HasKey

HasKey( feature, key ) -> returns: Boolean

Indicates whether a dictionary or feature has the input key.

Name	Type	Description
feature	Dictionary \| Feature	The dictionary or feature to check for a key or field name.
key	Text	The key or field name to check.

Returns: Boolean

Example

prints true

var d = Dictionary('Port Hope', 16214, 'Grafton', '<1000', 'Cobourg', 18519);

HasKey(d, 'Cobourg');

IndexOf

IndexOf( inputArray, item ) -> returns: Number

Returns the zero-based index location of the input item in an array. If item does not exist, then -1 is returned.

Name	Type	Description
inputArray	Array	The array to search.
item	*	The item to locate in the array.

Returns: Number

Example

prints 2

var array = [1,2,3,4];

return indexof(array, 3);

IsNan

IsNan( value ) -> returns: Boolean

Since version 1.5

Indicates whether the input value is not a number (NaN). A number is considered NaN in one of the following scenarios:

0/0
Infinity / Infinity
Infinity * 0
Any operation in which NaN is an operand
Casting a non-numeric string or undefined to a number

Name	Type	Description
value	*	The value to check if it is NaN.

Returns: Boolean

Example

// Returns true

IsNan(Infinity / Infinity)

// Returns false

IsNan('4')

NextSequenceValue

NextSequenceValue( inputSequenceName ) -> returns: Number

Since version 1.4

Profiles: Attribute Rules

Returns the next sequence value from the database sequence specified. If inputSequenceName does not exist, the expression will error. This function is only valid in the calculation profile when used in attribute rules.

Name	Type	Description
inputSequenceName	Text	The name of the sequence. This must already be configured in the database.

Returns: Number

Example

Returns a number with the next sequence value

NextSequenceValue('PipeIDSeq')

Number

Number( value, pattern? ) -> returns: Number

Parses the input value to a number.

Name

Type

Description

value

The value to convert to a number.

pattern

Text

optional The format pattern string used to parse numbers formatted in a localized context from a string value to a number. The table below describes the characters that may be used in the pattern.

Value	Description
0	Mandatory digits
#	Optional digits
%	Divide by 100

Returns: Number

Example

Parses a number using a grouping separator appropriate for the local in which the expression is executed

returns 1365

Number('1,365', ',###')

Remove strings from number.

prints 10

Number('abc10def', 'abc##def')

Specify minimum digits past 0 as two and maximum digits past 0 as 4.

prints 10.456

Number('10.456','00.00##')

Specify minimum digits past 0 as two and maximum digits past 0 as 4. The left and right side of the function must match or NaN is returned.

prints NaN

Number('10.4','00.00##')

Indicate the size of the repeated group and the final group size of the input value.

prints 1212456

Number('12,12,456', ',##,###')

If there is a negative subpattern, it serves only to specify the negative prefix and suffix.

prints -1223345

Number('-12,23,345', ',##,###;-,##,###')

Divide by 100. Maximum of three decimal places can be input.

prints 0.9999

Number('99.99%', '#.##%')

OrderBy

OrderBy( featureSet, expression ) -> returns: FeatureSet

Since version 1.5

Profiles: Attribute Rules | Popup | Field Calculate

Orders a FeatureSet by using a SQL92 OrderBy clause.

Name	Type	Description
featureSet	FeatureSet	The FeatureSet, or layer, to order.
expression	Text	The SQL92 expression used to order features in the layer.

Returns: FeatureSet

Example

Order features by population where features with the highest population are listed first

OrderBy($layer, 'POPULATION DESC')

Order features by rank in ascending order

OrderBy($layer, 'Rank ASC')

Reverse

Reverse( inputArray ) -> returns: Array

Reverses the contents of the array in place.

Name	Type	Description
inputArray	Array	The array to be reversed.

Returns: Array

Example

returns ['grey', 'purple', 'orange']

Reverse(['orange', 'purple', 'grey'])

Sort

Sort( inputArray, comparator? ) -> returns: Array

Sorts an array by ASCII value. If all the items in the array are the same type, an appropriate sort function will be used. If they are different types, the items will be converted to strings. If the array contains objects, and no user defined function is provided, no sort will happen.

Name	Type	Description
inputArray	Array	The array to sort.
comparator	Text	optional The name of a user defined function to be used for the sort.

Returns: Array

Example

returns ['$', 1, 'A', 'a']

Sort([1, 'a', '$', 'A'])

Sort using a user defined function

returns '[{ 'AGE': 24, 'NAME': 'Emma' }, { 'AGE': 25, 'NAME': 'Sam' }, { 'AGE': 27, 'NAME': 'Bob' } ]'

var peopleArray = [{ 'NAME': 'Sam', 'AGE': 25 }, {'NAME': 'Bob', 'AGE': 27 },{ 'NAME': 'Emma', 'AGE': 24 }];

function compareAge(a,b){

if (a['AGE']<b['AGE'])

return -1;

if (a['AGE']>b['AGE'])

return 1;

return 0;

}

return Sort(peopleArray, compareAge);

Text

Text( value, format? ) -> returns: Text

Converts its argument into a string and optionally formats it. Returns null if it fails.

Name

Type

Description

value

A value to be converted to a string (e.g. date, number or other type).

format

Text

optional Formatting string for dates or numbers. See the list of possible values below.

Value	Description
0	Digit
#	Digit, omitting leading/trailing zeros
D	Day of the month, not padded (1 - 31).
DD	Day of the month, padded (01 - 31).
DDD	Ordinal day of the year (1 - 365).
d	Day of the week (1 - 7)
ddd	Abbreviated day of the week (e.g. Mon)
dddd	Full day of the week (e.g. Monday).
M	Month number (1 - 12)
MM	Month number, padded (01 - 12).
MMM	Abbreviated month name (e.g. Jan).
MMMM	Full month name (e.g. January)
m	Minutes, not padded (0 - 59).
mm	Minutes, padded (00 - 59).
Y	Full year
YY	Two-digit year
h	Civilian hours, not padded (0 - 12)
hh	Civilian hours, padded (00 - 12)
H	Military hours, not padded (0 - 24)
HH	Military hours, padded (00 - 24)
s	Seconds, not padded (0 - 59)
ss	Seconds, padded (00 - 59)

Returns: Text

Example

Pad the number to the left of the decimal

prints '0123'

Text(123, '0000')

Restrict the number to the left of the decimal

prints '23'

Text(123, '00')

Group the number by thousands

prints '1,234'

Text(1234, '#,###')

Round the number to two decimal places

prints '12,345,678.12'

Text(12345678.123, '#,###.00')

Format number as currency

prints '$1,234.55'

Text(1234.55, '$#,###.00')

Round the number to two decimal places

prints '1.24'

Text(1.236, '#.00')

Maintain significant digits and group by thousands

prints '1,234.568'

Text(1234.5678, '#,##0.00#')

Format the number and format positive/negative - if there is a negative subpattern, it serves only to specify the negative prefix and suffix

prints 'Basement 2'

Text(-2, 'Floor #;Basement #')

prints 'Floor 2'

Text(2, 'Floor #;Basement #')

Multiply by 100 and format as percentage

prints '30%'

Text(0.3, '#%')

Format date and time

prints the date at the moment. eg 'Tuesday, October 25, 2016 @ 08:43:11'

Text(Now(), 'dddd, MMMM D, yyyy @ h:m:s')

Top

Top( items, numElements ) -> returns: Array / FeatureSet

Since version 1.3

Truncates the input array or FeatureSet and returns the first given number of elements.

Name	Type	Description
items	Array \| FeatureSet	The array to truncate. In profiles that support accessing data, this can be a FeatureSet.
numElements	Number	The number of elements to return from the beginning of the array or FeatureSet.

Returns: Array | FeatureSet

Example

returns [ 43,32,19 ]

Top([ 43,32,19,0,3,55 ], 3)

Returns the top 5 features with the highest population

Top( OrderBy($layer, 'POPULATION DESC'), 5 )

TypeOf

TypeOf( value ) -> returns: Text

Returns the type of the input value. Will return one of the following types: Array, Date, Text, Boolean, Number, Dictionary, Feature, Point, Polygon, Polyline, Multipoint, Extent, Function, Unrecognized Type.

Name	Type	Description
value	*	The input value, variable, or feature attribute.

Returns: Text

Example

prints 'Boolean'

TypeOf(true)

prints 'Date'

TypeOf(Now())

Text Functions

Functions for formatting text values. These are commonly used in the labeling and popup profiles.

Concatenate

Concatenate( values, separator?, format? ) -> returns: Text

Concatenates values together and returns a text value.

Name

Type

Description

values

Text[]

An array of text values to concatenate.

separator

Text

optional Separator to use for concatenation if values parameter is an array. Or text to concatenate, if a single value is provided for the first parameter. If not provided will be empty.

format

Text

optional Formatting text for dates or numbers. This parameter is available in Arcade version 1.3 and later. See the list of possible values below.

Value	Description
0	Digit
#	Digit, omitting leading/trailing zeros
D	Day of the month, not padded (1 - 31).
DD	Day of the month, padded (01 - 31).
DDD	Ordinal day of the year (1 - 365).
d	Day of the week (1 - 7)
ddd	Abbreviated day of the week (e.g. Mon)
dddd	Full day of the week (e.g. Monday).
M	Month number (1 - 12)
MM	Month number, padded (01 - 12).
MMM	Abbreviated month name (e.g. Jan).
MMMM	Full month name (e.g. January)
m	Minutes, not padded (0 - 59).
mm	Minutes, padded (00 - 59).
Y	Full year
YY	Two-digit year
h	Civilian hours, not padded (0 - 12)
hh	Civilian hours, padded (00 - 12)
H	Military hours, not padded (0 - 24)
HH	Military hours, padded (00 - 24)
s	Seconds, not padded (0 - 59)
ss	Seconds, padded (00 - 59)

Returns: Text

Example

prints 'red/blue/green'

Concatenate(['red', 'blue', 'green'], '/')

Find

Find( searchText, text, startpos? ) -> returns: Number

Finds a string of characters within a text value. Wildcards are NOT supported.

Name	Type	Description
searchText	Text	The character string to search for.
text	Text	The text to search.
startpos	Number	optional The zero-based index of the location in the text to search from.

Returns: Number

Example

prints 6

Find('380', 'Esri, 380 New York Street', 0)

Left

Left( value, charCount ) -> returns: Text

Returns the specified number of characters from the beginning of a text value.

Name	Type	Description
value	Text \| Array \| Number \| Boolean	The text from which to get characters.
charCount	Number	The number of characters to get from the beginning of the text.

Returns: Text

Example

prints 'the'

Left('the quick brown fox', 3)

Lower

Lower( value ) -> returns: Text

Makes a text value lower case.

Name	Type	Description
value	Text	The text to be made lowercase.

Returns: Text

Example

prints 'hello'

Lower('HELLO')

Mid

Mid( value, startpos, charCount ) -> returns: Text

Gets a number of characters from the middle of a text value.

Name	Type	Description
value	Text \| Array \| Number \| Boolean	The text from which to get characters.
startpos	Number	The starting position from which to get the text. 0 is the first position.
charCount	Number	The number of characters to extract.

Returns: Text

Example

prints 'quick'

Mid('the quick brown fox', 4, 5)

Proper

Proper( value, applyTo? ) -> returns: Text

Converts a text value to title case. By default, the beginning of every word is capitalized. The option firstword will capitalize only the first word.

Name	Type	Description
value	Text	The text to convert to title case.
applyTo	Text	optional A text value specifying the type of capitalization to be performed. By default every word is capitalized. This parameter accepts one of two values: everyword or firstword.

Returns: Text

Example

prints 'The Quick Brown Fox'

Proper('the quick brown fox', 'everyword')

Replace

Replace( value, searchText, replacementText, allOccurrences? ) -> returns: Text

Replaces a string within a text value or an element within an array. Defaults to replacing all occurrences.

Name	Type	Description
value	Text \| Array \| Number \| Boolean	The value in which to make replacements.
searchText	Text	The text to search for.
replacementText	Text	The replacement text.
allOccurrences	Boolean	optional Indicates if all occurrences of the searchText should be replaced in the text. Defaults to true.

Returns: Text

Example

prints 'the quick red fox'

Replace('the quick brown fox', 'brown', 'red')

Right

Right( value, charCount ) -> returns: Text

Returns the specified number of characters from the end of a text value.

Name	Type	Description
value	Text \| Array \| Number \| Boolean	The text from which to get characters.
charCount	Number	The number of characters to get from the end of the text value.

Returns: Text

Example

prints 'fox'

Right('the quick brown fox', 3)

Split

Split( value, separator, limit?, removeEmpty? ) -> returns: Text[]

Splits a text value into an array.

Name	Type	Description
value	Text	The text value to be split.
separator	Text	The separator used to split the text.
limit	Number	optional An integer that specifies the number of splits.
removeEmpty	Boolean	optional Indicates whether to remove empty values. By default this is false.

Returns: Text[]

Example

returns '[red,green]'

Split('red,green,blue,orange', ',', 2)

Trim

Trim( value ) -> returns: Text

Removes spaces from the beginning or end of an input text value.

Name	Type	Description
value	Text	The text to be trimmed.

Returns: Text

Example

prints 'hello world'

Trim(' hello world')

Upper

Upper( value ) -> returns: Text

Makes text upper case.

Name	Type	Description
value	Text	The text value to be made uppercase.

Returns: Text

Example

prints 'HELLO'

Upper('Hello')

Mathematical Functions

Functions for performing mathematical operations.

Abs

Abs( value ) -> returns: `Number`

Returns the absolute value of a number. If the input is null, then it returns 0.

Name	Type	Description
value	Number	A number on which to perform the operation.

Returns: Number

Example

prints 3

Abs(-3)

Acos

Acos( value ) -> returns: `Number`

Returns the arccosine of the input value in radians, in the range of zero to PI. If the input value is outside the appropriate range of +/- 1, then NaN is returned.

Name	Type	Description
value	Number	A number between -1 and 1 on which to perform the operation.

Returns: Number

Example

prints 1.266104

Acos(0.3)

Asin

Asin( value ) -> returns: `Number`

Returns the arcsine of the input value in radians, in the range of -PI/2 and PI/2. If the input value is outside the appropriate range of +/- 1, then NaN is returned.

Name	Type	Description
value	Number	A number between -1 and 1 on which to perform the operation.

Returns: Number

Example

prints 0.304693

Asin(0.3)

Atan

Atan( value ) -> returns: `Number`

Returns the arctangent of the input value in radians, in the range of -PI/2 and PI/2.

Name	Type	Description
value	Number	A number on which to perform the operation.

Returns: Number

Example

prints 0.785398

Atan(1)

Atan2

Atan2( y, x ) -> returns: `Number`

Returns the arctangent of the quotient of the input values in radians, in the range of -PI and zero or zero and PI depending on the sign of arguments.

Name	Type	Description
y	Number	A number representing the y-coordinate.
x	Number	A number representing the x-coordinate.

Returns: Number

Example

prints -2.356194

Atan2(-1, -1)

Average

Average( values, fieldName? ) -> returns: `Number`

Returns the average of a set of numbers. In profiles that support accessing data, this function can return the average value of a given numeric field in a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	A list or array of numbers on which to perform the operation. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 5

var array = [0,10]

Average(0,10,5,array)

calculates the difference between the feature's population and the average population of all features in the layer

$feature.population - Average($layer, 'population')

calculates the average population per square mile of all features in the layer

Average($layer, 'population / area')

Ceil

Ceil( value, numPlaces? ) -> returns: `Number`

Returns the input value rounded upwards to the given number of decimal places.

Name	Type	Description
value	Number	The number to round upward.
numPlaces	Number	`optional` The number of decimal places to round the `value` to. Default is 0. Trailing zeros will be truncated.

Returns: Number

Example

prints 2135.1

Ceil(2135.0905, 2)

Constrain

Constrain( value, min, max ) -> returns: `Number`

Since version 1.2

Constrains the given input value to minimum and maximum bounds. For example, if the input value is 10, the lower bound is 50, and the upper bound is 100, then 50 is returned.

Name	Type	Description
value	Number	The value to constrain to the given `min` and `max` bounds.
min	Number	The lower bound by which to constrain the input `value`. If the given value is less than the `min`, then `min` is returned.
max	Number	The upper bound by which to constrain the input `value`. If the given value is greater than the `max`, then `max` is returned.

Returns: Number

Example

returns 5

Constrain(5, 0, 10)

returns 0

Constrain(-3, 0, 10)

returns 10

Constrain(553, 0, 10)

Cos

Cos( value ) -> returns: `Number`

Returns the cosine of the input value in radians.

Name	Type	Description
value	Number	A number in radians on which to perform the operation.

Returns: Number

Example

prints 0.540302

Cos(1)

Exp

Exp( x ) -> returns: `Number`

Returns the value of e to the power of x, where e is the base of the natural logarithm 2.718281828.

Name	Type	Description
x	Number	The power, or number of times to multiply `e` to itself.

Returns: Number

Example

prints 7.389056

Exp(2)

Floor

Floor( value, numPlaces? ) -> returns: `Number`

Returns the input value rounded downward to the given number of decimal places.

Name	Type	Description
value	Number	A number to round downward.
numPlaces	Number	`optional` The number of decimal places to round the number. Default is 0. Trailing zeros will be truncated.

Returns: Number

Example

prints 2316.25

Floor(2316.2562, 2)

Log

Log( x ) -> returns: `Number`

Returns the natural logarithm (base e) of x.

Name	Type	Description
x	Number	A number on which to perform the operation.

Returns: Number

Example

prints 2.302585

Log(10)

Max

Max( values, fieldName? ) -> returns: `Number`

Returns the highest value from an array of numbers. In profiles that support accessing data, this function can return the highest value for a given numeric field from a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	An array or list of numbers. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 89

Max([23,56,89])

prints 120

Max(23,5,120,43,9)

prints the max value of the population field for all features in the layer

Max($layer, 'population')

calculates the max population per square mile of all features in the layer

Max($layer, 'population / area')

Mean

Mean( values, fieldName? ) -> returns: `Number`

Since version 1.1

Returns the mean value of an array of numbers. In profiles that support accessing data, this function can return the mean value of a given numeric field in a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	A list or array of numbers from which to calculate the mean. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

Use a single array as input

returns 5

var vals = [1,2,3,4,5,6,7,8,9];

Mean(vals);

Use comma separated values with array element

returns 5

var array = [0,10];

Mean(0,10,5,array);

calculates the difference between the feature's population and the mean population of all features in the layer

$feature.population - Mean($layer, 'population')

calculates the mean population per square mile of all features in the layer

Mean($layer, 'population / area')

Min

Min( values, fieldName? ) -> returns: `Number`

Returns the lowest value in a given array. In profiles that support accessing data, this function can return the lowest value for a given numeric field from a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	An array or list of numbers. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 23

Min([23,56,89])

prints 5

Min(23,5,120,43,9)

prints the min value of the population field for all features in the layer

Min($layer, 'population')

returns the minimum population per square mile of all features in the layer

Min($layer, 'population / area')

Pow

Pow( x, y ) -> returns: `Number`

Returns the value of x to the power of y.

Name	Type	Description
x	Number	The base value.
y	Number	The exponent. This indicates the number of times to multiply `x` by itself.

Returns: Number

Example

prints 9

Pow(3, 2)

Random

Random( ) -> returns: `Number`

Returns a random number between 0 and 1.

Name

Type

Description

Returns: Number

Example

Random()

Round

Round( value, numPlaces? ) -> returns: `Number`

Returns the input value, rounded to the given number of decimal places.

Name	Type	Description
value	Number	A number to round.
numPlaces	Number	`optional` The number of decimal places to round the number to. Default is `0`. Trailing zeros will be truncated.

Returns: Number

Example

prints 2316.26

Round(2316.2562, 2)

Sin

Sin( value ) -> returns: `Number`

Returns the sine of the input value.

Name	Type	Description
value	Number	A number in radians on which to perform the operation.

Returns: Number

Example

prints 0.841741

Sin(1)

Sqrt

Sqrt( value ) -> returns: `Number`

Returns the square root of a number.

Name	Type	Description
value	Number	A number on which to calculate the square root.

Returns: Number

Example

prints 3

Sqrt(9)

Stdev

Stdev( values, fieldName? ) -> returns: `Number`

Returns the standard deviation (population standard deviation) of a set of numbers. In profiles that support accessing data, this function can return the standard deviation for the values from a given numeric field in a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	An array or list of numbers on which to perform the operation. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 27.5

Stdev(23,56,89,12,45,78)

prints the standard deviation of values from the 'population' field

Stdev($layer, 'population')

calculates the standard deviation of the population per square mile of all features in the layer

Stdev($layer, 'population / area')

Sum

Sum( values, fieldName? ) -> returns: `Number`

Returns the sum of a set of numbers. In profiles that support accessing data, this function can return the sum of values returned from a given numeric field in a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	An array of numbers on which to perform the operation. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 303

Sum(23,56,89,12,45,78)

calculates the population of the current feature as a % of the total population of all features in the layer

( $feature.population / Sum($layer, 'population') ) * 100

calculates the total number of votes cast in an election for the entire dataset

Sum($layer, 'democrat + republican + other')

Tan

Tan( value ) -> returns: `Number`

Returns the tangent of an angle in radians.

Name	Type	Description
value	Number	A number on which to calculate the tangent.

Returns: Number

Example

prints 0.57389

Tan(0.521)

Variance

Variance( values, fieldName? ) -> returns: `Number`

Returns the variance (population variance) of a set of numbers. In profiles that support accessing data, this function can return the variance of the values from a given numeric field in a FeatureSet.

Name	Type	Description
values	Number[] \| FeatureSet	An array of numbers on which to perform the operation. In profiles that support accessing data, this can be a FeatureSet.
fieldName	Text	`optional` Specifies the name of a numeric field or SQL92 expression for which the statistic will be calculated from the input FeatureSet. This parameter only applies when a FeatureSet is specified.

Returns: Number

Example

prints 756.25

Variance(12,23,45,56,78,89)

prints the variance for the population field in the given layer

Variance($layer, 'population')

calculates the variance of the population per square mile of all features in the layer

Variance($layer, 'population / area')

posted @ 2019-01-26 02:49 ParamousGIS 阅读(1446) 评论(0) 编辑收藏举报

刷新页面返回顶部

ArcGIS Arcade

Constants

Infinity

Example

PI

Example

TextFormatting.BackwardSlash

Example

TextFormatting.DoubleQuote

Example

TextFormatting.ForwardSlash

Example

TextFormatting.NewLine

Example

TextFormatting.SingleQuote

Example

TextFormatting.Tab

Example

Mathematical Functions

Abs

Abs( value ) -> returns: Number

Returns: Number

Example

Acos

Acos( value ) -> returns: Number

Returns: Number

Example

Asin

Asin( value ) -> returns: Number

Returns: Number

Example

Atan

Atan( value ) -> returns: Number

Returns: Number

Example

Atan2

Atan2( y, x ) -> returns: Number

Returns: Number

Example

Average

Average( values, fieldName? ) -> returns: Number

Returns: Number

Example

Ceil

Ceil( value, numPlaces? ) -> returns: Number

Returns: Number

Example

Constrain

Constrain( value, min, max ) -> returns: Number

Returns: Number

Example

Cos

Cos( value ) -> returns: Number

Returns: Number

Example

Exp

Exp( x ) -> returns: Number

Returns: Number

Example

Floor

Floor( value, numPlaces? ) -> returns: Number

Returns: Number

Example

Log

Log( x ) -> returns: Number

Returns: Number

Example

Max

Max( values, fieldName? ) -> returns: Number

Returns: Number

Example

Mean

Mean( values, fieldName? ) -> returns: Number

Returns: Number

Example

Use a single array as input

Use comma separated values with array element

Min

Min( values, fieldName? ) -> returns: Number

Returns: Number

Abs( value ) -> returns: `Number`

Acos( value ) -> returns: `Number`

Asin( value ) -> returns: `Number`

Atan( value ) -> returns: `Number`

Atan2( y, x ) -> returns: `Number`

Average( values, fieldName? ) -> returns: `Number`

Ceil( value, numPlaces? ) -> returns: `Number`

Constrain( value, min, max ) -> returns: `Number`

Cos( value ) -> returns: `Number`

Exp( x ) -> returns: `Number`

Floor( value, numPlaces? ) -> returns: `Number`

Log( x ) -> returns: `Number`

Max( values, fieldName? ) -> returns: `Number`

Mean( values, fieldName? ) -> returns: `Number`

Min( values, fieldName? ) -> returns: `Number`

Pow( x, y ) -> returns: `Number`

Random( ) -> returns: `Number`

Round( value, numPlaces? ) -> returns: `Number`

Sin( value ) -> returns: `Number`

Sqrt( value ) -> returns: `Number`

Stdev( values, fieldName? ) -> returns: `Number`

Sum( values, fieldName? ) -> returns: `Number`

Tan( value ) -> returns: `Number`

Variance( values, fieldName? ) -> returns: `Number`