private void LoadAGeoTiffImage_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.BackgroundOverlay.BackgroundBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);

            GeoTiffRasterLayer worldImageLayer = new GeoTiffRasterLayer(@"..\..\SampleData\Data\world.tif");
            worldImageLayer.UpperThreshold = double.MaxValue;
            worldImageLayer.LowerThreshold = 0;
            worldImageLayer.IsGrayscale = false;

            LayerOverlay ImageOverlay = new LayerOverlay();
            ImageOverlay.Layers.Add("WorldImageLayer", worldImageLayer);
            winformsMap1.Overlays.Add(ImageOverlay);

            winformsMap1.CurrentExtent = new RectangleShape(-118.098, 84.3, 118.098, -84.3);
            winformsMap1.Refresh();
        }