问热图渲染器ArcGIS Javascript 4.4仅基于图层中点的数量及其彼此的局部性

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var earthquakeLayer = new FeatureLayer({
  // url to a point dataset
});

// visualization based on field

var heatmapParams = {
  layer: earthquakeLayer,
  view: view,
  field: "magnitude"
};

// when the promise resolves, apply the renderer to the layer
heatmapRendererCreator.createRenderer(heatmapParams)
  .then(function(response){
    earthquakeLayer.renderer = response.renderer;
  });