Hi there!

I got a problem with creating mapElements (here Pathelements and Symbolelements tested).

I I add them programmaticly to a new layer, I can't see them on the map, but they are in the elements collection of the layer.

If I add them to a layer, where a shapefile is loaded in (as an example american powerplants as point shapes) then I can see the added Elements, but just if at least one element of the existing power plant points is in the current mapview. For example if i zoom or move to europe, the added mapelements disappear!

Does anyone has any suggestion for this?

I used the following code for adding layer:

        Dim kkwLayer As New MapLayer()
        kkwLayer.LayerName = "kkwLayer"
        reader = New ShapeFileReader()
        reader.Uri = "/../../Shapefiles/nuclear-facilities-update"
        converter = New DataMapping.Converter()
        reader.DataMapping = TryCast(converter.ConvertFromString("ToolTip=NAME"), DataMapping)
        kkwLayer.Reader = reader
        kkwLayer.SymbolType = MapSymbolType.Pentagram
        theMap.Layers.Add(kkwLayer)

and the following code to add SymbolElements in the mapmouseleftup event:

            Dim theMap As XamMap = DirectCast(sender, XamMap)
            Dim mousePosition As Point = e.Position
            Dim mapPosition As Point =      theMap.Viewport.RootCanvas.RenderTransform.Inverse.Transform(mousePosition)
            Dim geoPosition As Point = theMap.MapProjection.UnprojectFromMap(mapPosition)
          
          
            Dim latitude As Double = geoPosition.Y
            Dim longitude As Double = geoPosition.X

            ' Get Point data using a projection from Geodetic to Cartesian coordinates
            Dim origin As Point = theMap.MapProjection.ProjectToMap(New Point(longitude, latitude))
            'Dim origin As Point = geoPosition
            Dim element As New SymbolElement()

            element.SymbolOrigin = origin
            element.Caption = "Marker"
            element.SymbolType = MapSymbolType.Pentagon
            element.SymbolSize = 15


            theMap.Layers("kkwLayer").Elements.Add(element)

The same is happening with PathElements, did not try with SurfaceElements

Thanks a lot in advance!

Edit: I have OpenStreetmaps as Geoimaginery in the background