How to Create a Heat Map and Point Grouping in JMap

Did you know that you can generate heat maps or clusters of points with JMap and use them in the JMap Pro, Web and Mobile apps? Heat maps visually represent the concentration level distribution in reference to objects or events in a territory. The stronger a color’s intensity, the higher the concentration level.


Heat maps are created in JMap Admin from point layers and controlled by a few settings. The radius determines the necessary distance between 2 points in order for them to create a hot spot. The intensity determines the concentration level required to create hot spots (the vividness of the color is in correlation with the level of the intensity).

The weight influences the relative intensity at each point by using the value of a numeric attribute. Finally, the opacity allows users to adjust the transparency level of the heat map (essential in visually accessing the information under the color).

Point clusters in turn, are used to group sets of points which are near one another on the display. They are represented as special symbols on the map and show the number of elements they include. This allows users to create maps that appear less cluttered when viewed at a small scale.

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To configure point cluster maps in JMap Admin, users must provide certain parameters. The distance determines the minimum distance (in pixels) between 2 points for them to be clustered. The minimum elements parameter defines the lowest number of components necessary to form a cluster.

These map representations help to quickly identify the impact or the evolution of a phenomenon in a specific territory. They enable users to anticipate trends and take more proactive decisions. For example, they can illustrate the environmental impacts of a construction project, the concentration of accidents in the context of a road development or the socio-demographic targeting for a social awareness campaigns. These maps become significant allies in field operations, communications and service delivery.

Discover heat maps and other functionalities in JMap that will help you transform your geospatial data into business intelligence.