Creating Heatmaps in TMS FNC Maps for Delphi



Heatmaps are a powerful way to visualize data, revealing patterns that might not be immediately obvious in raw data. With TMS FNC Maps, adding a heatmap to your application is straightforward and flexible. This blog post will guide you through the process of creating a heatmap using the AddHeatMap method.

What is a Heatmap?

A heatmap displays data points using varying colors to represent different values. In TMS FNC Maps, each data point can have an optional weight value, which intensifies the color representation, making it easier to identify areas of higher density or importance.

Adding a Heatmap to your Map

To display a heatmap, you need an array of coordinates. Each coordinate will act as a data point on the map. Here's a basic example:

var
  ca: TTMSFNCMapsCoordinateRecArray;
  hm: TTMSFNCMapsHeatMap;

begin
  SetLength(ca, 2);

  ca[0].Latitude := 37.782551;
  ca[0].Longitude := -122.445368;
  //Optional setting
  ca[0].Weight := 1;
  //

  ca[1].Latitude := 37.782745;
  ca[1].Longitude := -122.444586;
  //Optional setting
  ca[1].Weight := 1;
  //

  TMSFNCGoogleMaps1.BeginUpdate;
  hm := TMSFNCGoogleMaps1.AddHeatMap(ca);
  //Optional settings
  hm.Opacity := 1;
  hm.GradientStartColor := gcGreen;
  hm.GradientMidColor := gcYellow;
  hm.GradientEndColor := gcRed;
  //
  TMSFNCGoogleMaps1.EndUpdate;
end;

Customizing Your Heatmap

You can adjust the data point weight, opacity and gradient colors to match your specific visualization needs. 

Key Parameters

• Coordinates: An array where each entry represents a data point.

• Weight: Optional; a weight value that affects the intensity of the data point.

• Opacity: Adjusts the transparency of the heatmap.

• Gradient Colors: Define the start, mid, and end colors for the heatmap gradient, enabling smooth transitions between colors.

Supported Mapping Services

The Heatmaps functionality is supported by the following mapping services:

     Google Maps

     HERE Maps

     OpenLayers

     Leaflet

Conclusion

Heatmaps are a great way to represent complex data visually. With TMS FNC Maps, you can easily add and customize heatmaps to enhance your application's data visualization capabilities. Whether you're highlighting high-density areas or showing patterns over a geographic region, heatmaps can make your data more accessible and easier to understand.

Available Now

Ready to enhance your project with powerful mapping visualizations using TMS FNC Maps?
Download the latest version of TMS FNC Maps and get started today!