Hi,

I need to map a substantial number of elements on a map (ie approx 50,000). Although this works, it's obviously very slow.

Instead I've developed a system which will create an image, and place dots on the image in the relevant location based on lat/long. I can then overlay this transparent image over the map.

This works fine if I have the map set to a default zoom, however as soon as I zoom in or out, the image overlayed resizes, so then all my points are out of position.

How do I change this so effectively it works in the same way as the map background, ie so when I zoom in or out, my image zooms accordingly?

Currently I'm just adding the image as an element to the map;

        Dim origin As Point = MapTest.MapProjection.ProjectToMap(New Point(0,0)) 'Add image to centre
        Dim element As New SymbolElement()
 
        element.SymbolOrigin = origin
        element.Caption = "MyImage"
        element.SymbolType = MapSymbolType.None
        element.IsClickable = True
 
        element.Value = 1  --use first image from the layer
 
        MapTest.Layers("symbolLayer").Elements.Add(element)
        Dim worldRect As Rect = MapTest.Layers("symbolLayer").WorldRect
        worldRect.Union(element.WorldRect)
        MapTest.Layers("symbolLayer").WorldRect = worldRect

The front end has the following layer, with the image built in;
                <ig:MapLayer x:Name="symbolLayer">
                    <ig:MapLayer.ValueTemplate>
                        <DataTemplate>
                            <Image Width="3000" Height="2000" Source="i/MyPointsLayer.png" />
                        </DataTemplate>
                    </ig:MapLayer.ValueTemplate>
                </ig:MapLayer>

Any help appreciated.