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ThinkGeo Cloud
ThinkGeo UI Controls
ThinkGeo Open Source
Help and Support
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using System; using System.Collections.Generic; using System.Linq; using System.Text; using ThinkGeo.MapSuite.Core; namespace ProjectionInFeet { class LambertInFeetProjection : Projection { Proj4Projection proj4Projection = new Proj4Projection(); public LambertInFeetProjection() { //Lambert projection as internal projection. proj4Projection.InternalProjectionParametersString = Proj4Projection.GetEpsgParametersString(4326); //Geodetic (Longitude/Latitude) as external projection. proj4Projection.ExternalProjectionParametersString = Proj4Projection.GetEsriParametersString(102004); } protected override Vertex[] ConvertToExternalProjectionCore(double[] x, double[] y) { proj4Projection.Open(); Vertex[] vertices = new Vertex[x.Length]; for (int i = 0; i < vertices.Length; i++) { //converts Longitude/Latitude to Meters for Lambert. vertices[i] = proj4Projection.ConvertToExternalProjection(x[i], y[i]); //Then we need to convert meters to feet. vertices[i].X = Conversion.ConvertMeasureUnits(vertices[i].X, DistanceUnit.Meter, DistanceUnit.Feet); vertices[i].Y = Conversion.ConvertMeasureUnits(vertices[i].Y, DistanceUnit.Meter, DistanceUnit.Feet); } proj4Projection.Close(); return vertices; } protected override Vertex[] ConvertToInternalProjectionCore(double[] x, double[] y) { proj4Projection.Open(); Vertex[] vertices = new Vertex[x.Length]; for (int i = 0; i < vertices.Length; i++) { //First, we need to convert feet to meters. x[i] = Conversion.ConvertMeasureUnits(x[i], DistanceUnit.Feet, DistanceUnit.Meter); y[i] = Conversion.ConvertMeasureUnits(y[i], DistanceUnit.Feet, DistanceUnit.Meter); //Then, we can convert from meters to geodetic (Longitude/Latitude). vertices[i] = proj4Projection.ConvertToInternalProjection(x[i], y[i]); } proj4Projection.Close(); return vertices; } } }
using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; namespace ProjectionInFeet { 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.Drawing; using System.Windows.Forms; using ThinkGeo.MapSuite.Core; namespace ProjectionInFeet { public partial class TestForm : Form { private MapEngine mapEngine = new MapEngine(); private Bitmap bitmap = null; ShapeFileFeatureLayer worldLayer = null; public TestForm() { InitializeComponent(); } private void TestForm_Load(object sender, EventArgs e) { // Set the full extent and the background color mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-7948051,5116233,7630384,-5296296), Map.Width, Map.Height); mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean); // Add the static layers to the MapEngine worldLayer = new ShapeFileFeatureLayer(@"..\..\Data\USStates_lambert.shp", ShapeFileReadWriteMode.ReadOnly); worldLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.County1; worldLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; mapEngine.StaticLayers.Add("StatesLayer", worldLayer); //Add the dynamic layer to the MapEngine InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer(); //The feature has its coordinate in Longitude/Latitude. Feature newFeature1 = new Feature(new PointShape(-95.83, 39.15)); inMemoryFeatureLayer.InternalFeatures.Add("myFeature", newFeature1); inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultPointStyle = PointStyles.CreateSimpleCircleStyle(GeoColor.SimpleColors.Red, 10); inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20; //Applies the projection to the InMemoryFeatureLayer. //LambertInFeetProjection has the internal projection as Lambert (feet) and //external projection as geodetic (Longitude/Latitude). LambertInFeetProjection lambertProj = new LambertInFeetProjection(); inMemoryFeatureLayer.FeatureSource.Projection = lambertProj; mapEngine.DynamicLayers.Add(inMemoryFeatureLayer); DrawImage(); } private void DrawImage() { if (bitmap != null) { bitmap.Dispose(); } bitmap = new Bitmap(Map.Width, Map.Height); mapEngine.OpenAllLayers(); mapEngine.DrawStaticLayers(bitmap, GeographyUnit.Feet); mapEngine.DrawDynamicLayers(bitmap, GeographyUnit.Feet); 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(); } } }