private void DisplayMap_Load(object sender, EventArgs e)
        {
            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;

            EllipseShape elipse1 = new EllipseShape(new PointShape(0, 0), 80);
            EllipseShape elipse2 = new EllipseShape(new PointShape(0, 0), 90);

            InMemoryFeatureLayer elipseLayer = new InMemoryFeatureLayer();
            elipseLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = new AreaStyle(new GeoPen(GeoColor.SimpleColors.Red), new GeoSolidBrush(GeoColor.SimpleColors.Transparent));
            elipseLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            elipseLayer.InternalFeatures.Add(new Feature(elipse1));
            elipseLayer.InternalFeatures.Add(new Feature(elipse2));


            LineShape perimeter1 = new LineShape();
            perimeter1.Vertices.Add(new Vertex(elipse1.Center.X, elipse1.Center.Y));
            perimeter1.Vertices.Add(elipse1.ToPolygon().OuterRing.Vertices[0]);

            LineShape perimeter2 = new LineShape();
            perimeter2.Vertices.Add(new Vertex(elipse2.Center.X, elipse2.Center.Y));
            perimeter2.Vertices.Add(elipse2.ToPolygon().OuterRing.Vertices[40]);

            Feature perimeter1Feature = new Feature(perimeter1);
            perimeter1Feature.ColumnValues.Add("radius", elipse1.GetPerimeter(GeographyUnit.DecimalDegree, DistanceUnit.Meter).ToString() + " meters");

            Feature perimeter2Feature = new Feature(perimeter2);
            perimeter2Feature.ColumnValues.Add("radius", elipse2.GetPerimeter(GeographyUnit.DecimalDegree, DistanceUnit.Meter).ToString() + " meters");

            InMemoryFeatureLayer perimeterLayer = new InMemoryFeatureLayer();
            perimeterLayer.Open();
            perimeterLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.Canal1;
            perimeterLayer.ZoomLevelSet.ZoomLevel01.DefaultTextStyle = TextStyles.Antarctical("radius");
            perimeterLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;
            perimeterLayer.Columns.Add(new FeatureSourceColumn("radius"));
            perimeterLayer.InternalFeatures.Add(perimeter1Feature);
            perimeterLayer.InternalFeatures.Add(perimeter2Feature);


            LayerOverlay ov = new LayerOverlay();
            ov.Layers.Add(elipseLayer);
            ov.Layers.Add(perimeterLayer);

            winformsMap1.Overlays.Add(ov);
            winformsMap1.CurrentExtent = new RectangleShape(-139.2, 92.4, 120.9, -93.2);
            winformsMap1.Refresh();
        }