private void DisplayMap_Load(object sender, EventArgs e)
        {
            winformsMap1.MouseClick += new MouseEventHandler(winformsMap1_MouseClick);
            winformsMap1.MouseWheel += new MouseEventHandler(winformsMap1_MouseWheel);//add new waypoints at the start, in the middle, and at the end of route/line afterwards
            winformsMap1.MouseDoubleClick += new MouseEventHandler(winformsMap1_MouseDoubleClick);//click on a leg (line between two waypoints) and choose whether it should be drawn as rhumb line or great circle

            winformsMap1.MapUnit = GeographyUnit.DecimalDegree;
            winformsMap1.CurrentExtent = new RectangleShape(-80, 80, 80, -80);

            WorldMapKitWmsDesktopOverlay worldMapKitDesktopOverlay = new WorldMapKitWmsDesktopOverlay();
            winformsMap1.Overlays.Add(worldMapKitDesktopOverlay);
            winformsMap1.EditOverlay = editOverlay;

            trackOverlay.TrackEnded += new EventHandler<TrackEndedTrackInteractiveOverlayEventArgs>(interactiveOverlay_TrackEnded);
            trackOverlay.TrackMode = TrackMode.None;

            winformsMap1.TrackOverlay = trackOverlay;

            winformsMap1.Refresh();
        }

        void winformsMap1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Right)
            {
                if (trackOverlay.TrackMode == TrackMode.None && editOverlay.EditShapesLayer.InternalFeatures.Count > 0)
                { RhumbLineAndGreatCircleSwitch(e); }
            }
        }

        void winformsMap1_MouseWheel(object sender, MouseEventArgs e)
        {
            LineShape lineshape = editOverlay.EditShapesLayer.InternalFeatures[0].GetShape() as LineShape;
            lineshape.Vertices.Add(new Vertex(0, 0));
            editOverlay.EditShapesLayer.InternalFeatures[0] = new Feature(lineshape);
            editOverlay.CalculateAllControlPoints();
        }

        void interactiveOverlay_TrackEnded(object sender, TrackEndedTrackInteractiveOverlayEventArgs e)
        {
            trackOverlay.TrackMode = TrackMode.None;
            trackOverlay.TrackShapeLayer.InternalFeatures.Clear();
            editOverlay.EditShapesLayer.InternalFeatures.Add(new Feature(e.TrackShape));
            editOverlay.CalculateAllControlPoints();
            rhumbLineShape = editOverlay.EditShapesLayer.InternalFeatures[0].GetShape() as LineShape;
        }

        EditInteractiveOverlay editOverlay = new EditInteractiveOverlay();
        TrackInteractiveOverlay trackOverlay = new TrackInteractiveOverlay();
        LineShape rhumbLineShape;

        void winformsMap1_MouseClick(object sender, MouseEventArgs e)
        {
            if (e.Button == System.Windows.Forms.MouseButtons.Right)
            {
                if (trackOverlay.TrackMode == TrackMode.None)
                { trackOverlay.TrackMode = TrackMode.Line; }
                else
                { trackOverlay.TrackMode = TrackMode.None; };
            }
        }

        private void RhumbLineAndGreatCircleSwitch(MouseEventArgs e)
        {
            LineShape lineshape = editOverlay.EditShapesLayer.InternalFeatures[0].GetShape() as LineShape;
            for (int i = 0; i < lineshape.Vertices.Count - 1; i++)
            {
                Collection<Vertex> vertices = new Collection<Vertex>();
                vertices.Add(lineshape.Vertices[i]);
                vertices.Add(lineshape.Vertices[i + 1]);
                MultipolygonShape bufferedLineShape = (new LineShape(vertices)).Buffer(1000, GeographyUnit.DecimalDegree, DistanceUnit.Kilometer);

                if (bufferedLineShape.Contains(ExtentHelper.ToWorldCoordinate(new RectangleShape(-80, 80, 80, -80), e.X, e.Y, winformsMap1.Width, winformsMap1.Height)))//if the trackline is clicked
                {
                    LineShape newLineShape = new LineShape();

                    if (MessageBox.Show("Please Choose RhumbLine Or GreatCircle", "gg", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == System.Windows.Forms.DialogResult.Yes)
                    {
                        PointShape startPointOfCircle = new PointShape(vertices[0]);
                        MultilineShape Circle = startPointOfCircle.GreatCircle(new PointShape(vertices[1]));

                        for (int n = 0; n < i; n++)
                        { newLineShape.Vertices.Add(lineshape.Vertices[n]); }

                        foreach (Vertex vertice in Circle.Lines[0].Vertices)
                        { newLineShape.Vertices.Add(vertice); }

                        for (int n = i + 2; n < lineshape.Vertices.Count; n++)
                        { newLineShape.Vertices.Add(lineshape.Vertices[n]); }
                    }
                    else
                    { newLineShape = rhumbLineShape; }
                    editOverlay.EditShapesLayer.InternalFeatures[0] = new Feature(newLineShape);
                    winformsMap1.Refresh(editOverlay);
                    break;
                }
            }
        }