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.

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.