using System;  
 using System.Collections.Generic;  
 using System.Linq;  
 using System.Windows.Forms;  
 
 namespace MeasurementsWithDecimalDegrees  
 {  
     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 MeasurementsWithDecimalDegrees  
 {  
     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)  
         {  
             // Set the extent and the background color  
             mapEngine.CurrentExtent = ExtentHelper.GetDrawingExtent(new RectangleShape(-97.7591, 30.3126, -97.7317, 30.2964), Map.Width, Map.Height);  
             mapEngine.BackgroundFillBrush = new GeoSolidBrush(GeoColor.GeographicColors.ShallowOcean);  
 
             //Displays the World Map Kit as a background.  
             ThinkGeo.MapSuite.Core.WorldMapKitLayer worldMapKitLayer = new ThinkGeo.MapSuite.Core.WorldMapKitLayer();  
             mapEngine.StaticLayers.Add(worldMapKitLayer);  
 
             PolygonShape polygonShape = new PolygonShape();  
             polygonShape.OuterRing.Vertices.Add(new Vertex(-97.7406, 30.3057));  
             polygonShape.OuterRing.Vertices.Add(new Vertex(-97.7354, 30.3031));  
             polygonShape.OuterRing.Vertices.Add(new Vertex(-97.7384, 30.2979));  
             polygonShape.OuterRing.Vertices.Add(new Vertex(-97.7445, 30.3006));  
             polygonShape.OuterRing.Vertices.Add(new Vertex(-97.7406, 30.3057));  
 
             LineShape lineShape = new LineShape();  
             lineShape.Vertices.Add(new Vertex(-97.7507, 30.3093));  
             lineShape.Vertices.Add(new Vertex(-97.7524, 30.3065));  
             lineShape.Vertices.Add(new Vertex(-97.7458, 30.3033));  
             lineShape.Vertices.Add(new Vertex(-97.7467, 30.3017));  
 
             InMemoryFeatureLayer inMemoryFeatureLayer = new InMemoryFeatureLayer();  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultAreaStyle = AreaStyles.CreateSimpleAreaStyle(GeoColor.FromArgb(80, GeoColor.StandardColors.Red), GeoColor.StandardColors.Black);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.DefaultLineStyle = LineStyles.CreateSimpleLineStyle(GeoColor.StandardColors.Red, 3, true);  
             inMemoryFeatureLayer.ZoomLevelSet.ZoomLevel01.ApplyUntilZoomLevel = ApplyUntilZoomLevel.Level20;  
 
             inMemoryFeatureLayer.InternalFeatures.Add("Area", new Feature(polygonShape));  
             inMemoryFeatureLayer.InternalFeatures.Add("Line", new Feature(lineShape));  
 
             mapEngine.DynamicLayers.Add("DynamicLayer", inMemoryFeatureLayer);  
 
             //Central Texas State Plane projection.  
             Proj4Projection StatePlaneProj4 = new Proj4Projection();  
             StatePlaneProj4.InternalProjectionParametersString = Proj4Projection.GetEpsgParametersString(4326); //Decimal Degrees (WGS 84)  
             StatePlaneProj4.ExternalProjectionParametersString = Proj4Projection.GetEsriParametersString(102739);//State Plane Texas Central Zone unit in Feet  
 
             //UTM Zone 14 N projection.  
             Proj4Projection UTMProj4 = new Proj4Projection();  
             UTMProj4.InternalProjectionParametersString = Proj4Projection.GetEpsgParametersString(4326); //Decimal Degrees (WGS 84)  
             UTMProj4.ExternalProjectionParametersString = Proj4Projection.GetEpsgParametersString(26914); //UTM zone 14 N unit in meters  
 
             //Gets the area of the polygon based on the default spherical geometry used for decimal degrees.  
             double DefaultArea = Math.Round(polygonShape.GetArea(GeographyUnit.DecimalDegree, AreaUnit.SquareMeters));  
             lblDefaultArea.Text = System.Convert.ToString(DefaultArea);  
 
             //Gets the area based on planar geometry with state plane coordinates.  
             double StatePlaneArea = Math.Round(GetArea(polygonShape, StatePlaneProj4, GeographyUnit.Feet, AreaUnit.SquareMeters));  
             lblStatePlaneArea.Text = System.Convert.ToString(StatePlaneArea);  
 
             //Gets the area based on planar geometry with UTM coordinates.  
             double UTMArea = Math.Round(GetArea(polygonShape, UTMProj4, GeographyUnit.Meter, AreaUnit.SquareMeters));  
             lblUTMArea.Text = System.Convert.ToString(UTMArea);  
 
 
             //Gets the length of the line based on the default spherical geometry used for decimal degrees.  
             double DefaultDistance = Math.Round( lineShape.GetLength(GeographyUnit.DecimalDegree, DistanceUnit.Meter), 2);  
             lblDefaultDistance.Text = System.Convert.ToString(DefaultDistance);  
 
             //Gets the length of the line based on planar geometry with state plane coordinates.  
             double StatePlaneDistance = Math.Round(GetLength(lineShape, StatePlaneProj4, GeographyUnit.Feet, DistanceUnit.Meter), 2);  
             lblStatePlaneDistance.Text = System.Convert.ToString(StatePlaneDistance);  
 
             //Gets the length of the line based on planar geometry with UTM coordiantes.  
             double UTMDistance = Math.Round(GetLength(lineShape, UTMProj4, GeographyUnit.Meter, DistanceUnit.Meter), 2);  
             lblUTMDistance.Text = System.Convert.ToString(UTMDistance);  
 
             DrawImage();  
         }  
 
         //Gets the Area of a area shape in decimal degrees based on the projection used.  
         private double GetArea(AreaBaseShape areaBaseShape, Proj4Projection proj4, GeographyUnit projectionUnit, AreaUnit areaUnit)  
         {  
             double result = 0;  
             proj4.Open();  
             AreaBaseShape projAreaBaseShape = (AreaBaseShape)proj4.ConvertToExternalProjection(areaBaseShape);  
             result = projAreaBaseShape.GetArea(projectionUnit, areaUnit);  
             proj4.Close();  
             return result;  
         }  
 
         //Gets the Length of a line shape in decimal gegrees based on the projection used.  
         private double GetLength(LineBaseShape lineBaseShape, Proj4Projection proj4, GeographyUnit projectionUnit, DistanceUnit lengthUnit)  
         {  
             double result = 0;  
             proj4.Open();  
             LineBaseShape projLineBaseShape = (LineBaseShape)proj4.ConvertToExternalProjection(lineBaseShape);  
             result = projLineBaseShape.GetLength(projectionUnit, lengthUnit);  
             proj4.Close();  
             return result;  
         }  
 
 
         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);  
         }  
 
 
 
     }  
 }