Method Overview

Method Details

scaleRange(params){Promise<ScaleRangeResult>}

Generates a suggested scale range (i.e. minScale and maxScale) to apply to the input layer. These values suggest the best scale range for viewing the input layer.

Parameters:

Specification:

params Object See the table below for details about parameters that may be passed to this function. Specification: layer FeatureLayer|SceneLayer|CSVLayer|PointCloudLayer|GeoJSONLayer The layer for which to generate a suggested min/max scale range. view View The SceneView or MapView where the layer will be rendered. sampleSize Number optional Default Value: 500 The number of features in the layer to sample for spatial statistics. A higher sample size will yield more precise results. However, higher sample sizes also require more time for the function to process the result. 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<ScaleRangeResult>	Resolves to an object containing the suggested min and max scale for the layer.

Example:

scaleRange({
  layer: featureLayer,
  view: view
}).then(function(response){
  // apply the suggested scale range to the input layer
  featureLayer.minScale = response.minScale;
  featureLayer.maxScale = response.maxScale;

  view.map.add(featureLayer);
});

Type Definitions

ScaleRangeResult

Suggested min and max scales to apply to the input layer for the scaleRange() function.

Properties:

minScale Number The suggested minScale to apply to the input layer.

maxScale Number The suggested maxScale to apply to the input layer.