private void LightRbtn_Checked(object sender, RoutedEventArgs e)
        {
            if (lightRbtn.IsChecked.Value)
            {
                darkRbtn.IsChecked        = false;
                transparentRbtn.IsChecked = false;

                thinkGeoCloudRasterMapsOverlay.MapType = ThinkGeoCloudRasterMapsMapType.Light;
                thinkGeoCloudRasterMapsOverlay.Refresh();

                layerOverlay.Layers.Clear();
                layerOverlay.Layers.Add(thinkGeoMBTilesFeatureLayerLight);
                layerOverlay.Refresh();
            }
        }
 private void RadioButton_Checked(object sender, RoutedEventArgs e)
 {
     if (IsLoaded)
     {
         overlay.MapType = (ThinkGeoCloudRasterMapsMapType)Enum.Parse(typeof(ThinkGeoCloudRasterMapsMapType),
                                                                      (sender as RadioButton).Content.ToString());
         overlay.Refresh();
     }
 }