uniqueValue

Method Overview

Method Details

createRenderer(params){Promise<RasterUniqueValuesResult>}

Generates a UniqueValueRenderer to render thematic imagery.

Parameters

Specification

params Object Input parameters for generating a unique value visualization. See the table below for details of each parameter. Specification layer ImageryLayer|ImageryTileLayer The input layer for which the renderer is generated. renderingRule RasterFunction optional Specifies the rule for how the requested image should be rendered. When renderingRule is applied, the server returns updated service information that reflects custom processing as defined by the rendering rule. If not provided, the output renderer is created using the layer's renderingRule. classFieldName String optional A preferred class field name used for calculating unique values. colors Number[][] optional The colors to apply to each unique value. This must be a two-dimensional array where each item of the first dimension is an array of 3-4 numbers representing RGB or RGBA values of each unique value. This overrides colorRamp. colorRamp AlgorithmicColorRamp|MultipartColorRamp optional The color ramp to apply to the renderer. signal AbortSignal optional Allows for cancelable requests. If canceled, the promise will be rejected with an error named AbortError. See also AbortController.

Returns

Type	Description
Promise<RasterUniqueValuesResult>	Resolves to an object containing a unique value renderer that can be set on the input layer.

Type Definitions

RasterUniqueValuesResult

The result object of the createRenderer() method. See the table below for details of each property.

Properties

renderer UniqueValueRenderer The UniqueValueRenderer renderer to apply to the input layer.

classFieldName String The class field name from which the unique value infos were generated.