Method Overview

Method Details

cloneScheme(scheme){RelationshipScheme}

Clones a relationship (bivariate color) scheme object.

Parameter:

scheme RelationshipScheme The relationship scheme object to clone.

Returns:

Type	Description
RelationshipScheme	Returns a clone of the given relationship scheme object.

Example:

// clones the primary scheme returned from the getSchemes() method
const relationshipScheme = primaryScheme.clone();

getSchemes(params){RelationshipSchemes}

Returns a primary scheme and secondary schemes defining symbol properties for relationship-based (bivariate choropleth) data-driven visualizations in a Layer. The basemap parameter determines the color of the symbols used to visualize each feature. The geometryType determines which type of symbol to return.

Parameters:

params Object See the table below for details of each parameter that may be passed to this function. Specification: basemap String|Basemap The basemap to pair with the visualization. This value indicates the best symbol colors for visualizing features with the given basemap. geometryType String The geometry type of the features to visualize. Possible Values: point | multipoint | polyline | polygon | mesh theme String optional Default Value: default Determines which set of primary and secondary color schemes to return Possible Values: default worldScale Boolean optional Indicates if the size units of the scheme will be in meters. This should be true when the scheme is intended for 3D volumetric symbology. A view must be provided if this property is set to true. view SceneView optional The SceneView instance in which the scheme will be used. This property is only applicable when the scheme will be used in conjunction with 3D symbols.

Returns:

Type	Description
RelationshipSchemes	Returns an object containing the optimal relationship color scheme to use for the given basemap; it also contains secondary schemes.

Example:

// gets the primary scheme for the features of the given geometry type and basemap
const schemes = relationshipSchemes.getSchemes({
  basemap: map.basemap,
  geometryType: featureLayer.geometryType
});

// the best default scheme for the layer and basemap
const primaryScheme = schemes.primaryScheme;

Type Definitions

RelationshipSchemeRelationshipSchemeForPoint|RelationshipSchemeForPolyline|RelationshipSchemeForPolygon|RelationshipSchemeForMesh

Defines the symbology scheme used to visualize relationship renderers (bivariate color) based on the layer's geometry type.

RelationshipSchemeForMesh

Properties defining the symbology scheme used to visualize relationship renderers (bivariate color) for mesh features.

Properties:

id String The ID uniquely identifying the color scheme.

colorsForClassBreaks Object[] Defines the colors to use in each bin of the relationship visualization. Specification: colors Color[][] The colors of the fill symbols used for each bin in the relationship visualization. numClasses Number The number of breaks (rows/columns) for each variable in the relationship visualization.

noDataColor Color The color of the fill symbol used to indicate features with no data.

opacity Number The opacity of the fill symbol (0 - 1).

RelationshipSchemeForPoint

Properties defining the symbology scheme used to visualize relationship renderers (bivariate color) for point features.

Properties:

id String The ID uniquely identifying the color scheme.

colorsForClassBreaks Object[] Defines the colors to use in each bin of the relationship visualization. Specification: colors Color[][] The fill colors of the point symbols used for each bin in the relationship visualization. numClasses Number The number of breaks (rows/columns) for each variable in the relationship visualization.

noDataColor Color The color of the point symbol used to indicate features with no data.

outline Object Properties for defining the outline of the marker symbol. Specification: color Color The outline color of the marker symbol. width Number The width of the outline in points.

opacity Number The opacity of the point symbol (0 - 1).

size Number The size of the point symbol in points.

RelationshipSchemeForPolygon

Properties defining the symbology scheme used to visualize relationship renderers (bivariate color) for polygon features.

Properties:

id String The ID uniquely identifying the color scheme.

colorsForClassBreaks Object[] Defines the colors to use in each bin of the relationship visualization. Specification: colors Color[][] The colors of the fill symbols used for each bin in the relationship visualization. numClasses Number The number of breaks (rows/columns) for each variable in the relationship visualization.

noDataColor Color The color of the fill symbol used to indicate features with no data.

outline Object Properties for defining the outline of the fill symbol. Specification: color Color The outline color of the fill symbol. width Number The width of the outline in points.

opacity Number The opacity of the fill symbol (0 - 1).

RelationshipSchemeForPolyline

Properties defining the symbology scheme used to visualize relationship renderers (bivariate color) for polyline features.

Properties:

id String The ID uniquely identifying the color scheme.

colorsForClassBreaks Object[] Defines the colors to use in each bin of the relationship visualization. Specification: colors Color[][] The colors of the line symbols used for each bin in the relationship visualization. numClasses Number The number of breaks (rows/columns) for each variable in the relationship visualization.

noDataColor Color The color of the line symbol used to indicate features with no data.

opacity Number The opacity of the line symbol (0 - 1).

width Number The width of the line symbol in points.

RelationshipSchemes

The return object of the getSchemes() method.

Properties:

primaryScheme RelationshipScheme The relationship scheme best suited for the given basemap and geometry type.

secondarySchemes RelationshipScheme[] Additional relationship schemes that may be used to visualize data of the given geometry type overlaid on the given basemap.

basemapId String The ID of the basemap associated with the given schemes.