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ThinkGeo Cloud
ThinkGeo UI Controls
ThinkGeo Open Source
Help and Support
External Resources
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); } } }