MLNHeatmapStyleLayer class

An MLNHeatmapStyleLayer is a style layer that renders a heatmap.

A heatmap visualizes the spatial distribution of a large, dense set of point data, using color to avoid cluttering the map with individual points at low zoom levels. The points are weighted by an attribute you specify. Use a heatmap style layer in conjunction with point or point collection features. These features can come from vector tiles loaded by an MLNHeatmapStyleLayer object, or they can be MLNHeatmapStyleLayer, MLNHeatmapStyleLayer, MLNHeatmapStyleLayer, or MLNHeatmapStyleLayer instances in an MLNHeatmapStyleLayer or MLNHeatmapStyleLayer object.

Consider accompanying a heatmap style layer with an MLNHeatmapStyleLayer or MLNHeatmapStyleLayer at high zoom levels. If you are unsure whether the point data in an MLNHeatmapStyleLayer is dense enough to warrant a heatmap, you can alternatively cluster the source using the MLNHeatmapStyleLayer option and render the data using an MLNHeatmapStyleLayer or MLNHeatmapStyleLayer.

You can access an existing heatmap style layer using the MLNStyle/layerWithIdentifier: method if you know its identifier; otherwise, find it using the MLNStyle/layers property. You can also create a new heatmap style layer and add it to the style using a method such as MLNStyle/addLayer:.

Related examples

See the Create a heatmap layer example to learn how to add this style layer to your map.

Example