using XAML Map Control to add a heatmap layer on a map based on OpenStreetMap from C# VS2013 WPF

Question

I am trying to use XAML MAP control (https://xamlmapcontrol.codeplex.com/) to add a heatmap layer on a map based on OpenStreetMap from C# VS2013 WPF.

I have added the h

Answer 1

You may use a derived MapImageLayer and override its UpdateImage to create a heatmap bitmap on the fly. This would of course only be a sensible approach, if creating the bitmap doesn't take too much time.

public class HeatmapImage : MapImageLayer
{
    protected override void UpdateImage(
        double west, double east, double south, double north, int width, int height)
    {
        BitmapSource bitmap = ... // create heatmap here
        UpdateImage(west, east, south, north, bitmap);
    }
}

You would then simply add the HeatmapImage to the map, and you're done:

Note that the map image in the bitmap would have to be created using the Web Mercator projection.

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EDIT: To give you an idea how a MapImage works, take a look at the following XAML snippet from the sample application in XAML Map Control. It displays an image with the given lat/lon bounds as an overlay in the map control. The actual image is a aerial image tile copied from Google Maps: