Heat Maps

The Essentials Heat Maps feature is only available for ArcGIS Server feature layers.

Large amounts of point data on a map tend to overlap and can be difficult to interpret. Heat maps resolve this issue by representing data densities instead of individual features.

In heat maps, different colors are used to represent different density ranges—the highest density, medium density, and lowest density. The colors are configurable. In the screen capture below, the heat map uses yellow to represent the highest density of features, red to represent medium density, and blue to represent the lowest (non-zero) density.

Crime data shown individually (left) and in a heat map (right)

You can configure the default visibility of heat maps, and you can enable end users to turn heat maps on and off. You can also configure settings that control the appearance of hot areas on the map, such as the colors and intensity.

If you do not configure the appearance settings in Manager, viewers use the default settings that are defined in the viewer's HeatMaps Module.

Heat maps work for point layers only. You cannot display heat maps for line or polygon layers.

The colors that are used for a layer's heat maps show in the map legend and in legend swatches in the Layer List.

Heat map colors in the map legend

Heat maps offer one method of visualizing data. Clustering is another method.

Heat Map Settings

Heat maps have the following settings:

Configure Heat Maps

To configure heat maps on a layer:

  1. In Manager, edit the map service that you want to configure.

    Make sure you edit the feature layer's map service component, not the layer component.

  2. Click the Feature Heat Maps tab.

  3. Configure the settings.

  4. Click Apply Settings.

Remove Heat Maps from a Layer

When you remove heat maps from a layer, end users cannot turn heat maps back on.

To remove heat maps from a layer:

  1. In Manager, edit the map service that you want to configure.

    Make sure you edit the feature layer's map service component, not the layer component.

  2. Click the Feature Heat Maps tab.

  3. Clear the Enabled checkbox.

  4. Clear the User Can Enable/Disable checkbox.

  5. Click Apply Settings.

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Documentation Version 4.11