using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
 
 namespace StreetIntersection  
 {  
     static class Program  
     {  
         /// <summary>  
         /// The main entry point for the application.  
         /// </summary>  
         [STAThread]  
         static void Main()  
         {  
             Application.EnableVisualStyles();  
             Application.SetCompatibleTextRenderingDefault(false);  
             Application.Run(new TestForm());  
         }  
     }  
 }  
 

 using System;  
 using System.Collections.ObjectModel;  
 using System.Drawing;  
 using System.Windows.Forms;  
 using ThinkGeo.MapSuite.Core;  
 
 namespace StreetIntersection  
 {  
     public partial class TestForm : Form  
     {  
         private MapEngine mapEngine = new MapEngine();  
         private Bitmap bitmap = null;  
 
        public TestForm()  
         {  
             InitializeComponent();  
         }  
 
         private void TestForm_Load(object sender, EventArgs e)  
         {  
 
             mapEngine.CurrentExtent = new RectangleShape(-97.7402,30.2793,-97.7284,30.2738);  
             mapEngine.BackgroundFillBrush =  new GeoSolidBrush(GeoColor.StandardColors.LightGoldenrodYellow);  
 
             ShapeFileFeatureLayer streetLayer = new ShapeFileFeatureLayer(@"..\..\Data\austinstreets.shp");  
             streetLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.LocalRoad2;  
             streetLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             //Gets the features according to the street name.  
             streetLayer.Open();  
             Collection<Feature> features1 = streetLayer.FeatureSource.GetFeaturesByColumnValue("FENAME", "Red River"); //"Speedway");  
             Collection<Feature> features2 = streetLayer.FeatureSource.GetFeaturesByColumnValue("FENAME", "15th"); //"Martin Luther King Jr");  
             streetLayer.Close();  
 
             //InMemoryFeatureLayer for displaying the street candidates and the intersection point.  
             InMemoryFeatureLayer intersectionInMemoryFeatureLayer = new InMemoryFeatureLayer();  
             intersectionInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.StandardColors.LightPink, 3, true);  
             intersectionInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimplePointStyle(PointSymbolType.Circle, GeoColor.StandardColors.Red, 12);  
             intersectionInMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             //Adds the street candidates feature and the intersection point feature to the InMemoryFeatureLayer  
             intersectionInMemoryFeatureLayer.Open();  
             intersectionInMemoryFeatureLayer.EditTools.BeginTransaction();  
 
             Collection<MultilineShape> multiLineShapes1 = new Collection<MultilineShape>();  
             Collection<MultilineShape> multiLineShapes2 = new Collection<MultilineShape>();  
 
             foreach (Feature feature1 in features1)  
             {  
                 MultilineShape multiLineShape = feature1.GetShape() as MultilineShape;  
                 multiLineShapes1.Add(multiLineShape);  
                 intersectionInMemoryFeatureLayer.EditTools.Add(new Feature(multiLineShape));  
             }  
             foreach (Feature feature2 in features2)  
             {  
                 MultilineShape multiLineShape = feature2.GetShape() as MultilineShape;  
                 multiLineShapes2.Add(multiLineShape);  
                 intersectionInMemoryFeatureLayer.EditTools.Add(new Feature(multiLineShape));  
             }  
 
             //Gets the intersection point (or points if this is the case)  
             intersectionInMemoryFeatureLayer.EditTools.Add(new Feature(GetIntersectionPoints(multiLineShapes1,multiLineShapes2,50,DistanceUnit.Meter,GeographyUnit.DecimalDegree)));  
             intersectionInMemoryFeatureLayer.EditTools.CommitTransaction();  
             intersectionInMemoryFeatureLayer.Close();  
 
 
             mapEngine.StaticLayers.Add("StreetLayer", streetLayer);  
             mapEngine.DynamicLayers.Add("Intersection", intersectionInMemoryFeatureLayer);  
 
             DrawImage();  
         }  
 
         //Gets the intersection point(s) based on the distance tolerance from the end points of the two collection of MultiLineShapes.  
         //We use a tolerance because we want to have an intersection being counted as such even if the points don't have the exact X and Y values.  
         private MultipointShape GetIntersectionPoints(Collection<MultilineShape> multiLineShapes1, Collection<MultilineShape> multiLineShapes2, double toleranceDistance, DistanceUnit toleranceUnit, GeographyUnit mapUnit)  
         {  
             MultipointShape intersectionMultiPointShape = new MultipointShape();  
 
             MultipointShape multiPointShape1 = GetEndPoints(multiLineShapes1);  
             MultipointShape multiPointShape2 = GetEndPoints(multiLineShapes2);  
 
             foreach (PointShape pointShape1 in multiPointShape1.Points)  
             {  
                 foreach (PointShape pointShape2 in multiPointShape2.Points)  
                 {  
                     if (pointShape1.GetDistanceTo(pointShape2, mapUnit, toleranceUnit) <= toleranceDistance)  
                     {  
                         intersectionMultiPointShape.Points.Add(pointShape1);  
                     }  
                 }  
             }  
             return intersectionMultiPointShape;  
         }  
 
         private MultipointShape GetEndPoints(Collection<MultilineShape> multilineShapes)  
         {  
             MultipointShape multipointShape = new MultipointShape();  
             foreach (MultilineShape multilineShape in multilineShapes)  
             {  
                 foreach (LineShape lineShape in multilineShape.Lines)  
                 {  
                     multipointShape.Points.Add(new PointShape(lineShape.Vertices[0]));  
                     multipointShape.Points.Add(new PointShape(lineShape.Vertices[lineShape.Vertices.Count|- 1]));  
                 }  
             }  
             return multipointShape;  
         }  
 
 
         private void DrawImage()  
         {  
             if (bitmap != null) { bitmap.Dispose(); }  
             bitmap = new Bitmap(Map.Width, Map.Height);  
             mapEngine.OpenAllLayers();  
             mapEngine.DrawStaticLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.DecimalDegree);  
             mapEngine.CloseAllLayers();  
 
             Map.Image = bitmap;  
         }  
 
         private void ToolBar_ButtonClick(object sender, ToolBarButtonClickEventArgs e)  
         {  
             switch (e.Button.Tag.ToString())  
             {  
                 case "Zoom In":  
                     mapEngine.CurrentExtent.ScaleDown(50);  
                     break;  
                 case "Zoom Out":  
                     mapEngine.CurrentExtent.ScaleUp(50);  
                     break;  
                 case "Full Extent":  
                     mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-180.0, 83.0, 180.0, -90.0), Map.Width, Map.Height);  
                     break;  
                 case "Pan Left":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Left, 20);  
                     break;  
                 case "Pan Right":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Right, 20);  
                     break;  
                 case "Pan Up":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Up, 20);  
                     break;  
                 case "Pan Down":  
                     mapEngine.CurrentExtent = ExtentHelper.Pan(mapEngine.CurrentExtent, PanDirection.Down, 20);  
                     break;  
                 default:  
                     break;  
             }  
             DrawImage();  
         }  
 
         private void btnClose_Click(object sender, EventArgs e)  
         {  
             this.Close();  
         }  
 
         private void Map_MouseMove(object sender, MouseEventArgs e)  
         {  
             //Displays the X and Y in screen coordinates.  
             statusStrip1.Items["toolStripStatusLabelScreen"].Text = "X:" + e.X + " Y:" + e.Y;  
 
             //Gets the PointShape in world coordinates from screen coordinates.  
             PointShape pointShape = ExtentHelper.ToWorldCoordinate(mapEngine.CurrentExtent, new ScreenPointF(e.X, e.Y), Map.Width, Map.Height);  
 
             //Displays world coordinates.  
             statusStrip1.Items["toolStripStatusLabelWorld"].Text = "(world) X:" + Math.Round(pointShape.X, 4) + " Y:" + Math.Round(pointShape.Y, 4);  
         }  
 
 
     }  
 }