private void geoImage_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
 {
     if (draggingEditPoint)
     {
         draggingEditPoint = false;
         var mousePosition = e.GetPosition(geoImage);
         DraggingEditPoint.X = mousePosition.X;
         DraggingEditPoint.Y = mousePosition.Y;
         double latitude;
         double longitude;
         LatLongUtil.GetLatLongDegreeFromPoint(mousePosition, out latitude, out longitude);
         DraggingEditPoint.Latitude  = latitude;
         DraggingEditPoint.Longitude = longitude;
         previousEditPointRect       = null;
         DrawLines();
     }
 }