osrtransform.cs

支持各种栅格图像和矢量图像读取的库

using System;
using OSR;

/**
 * <p>Title: GDAL C# OSRTransform example.</p>
 * <p>Description: A sample app to make coordinate transformations.</p>
 * @author Tamas Szekeres ([e-mail])
 * @version 1.0
 */

/// <summary>
/// A C# based sample to make simple transformations.
/// </summary> 
class OSRTransform {
	public static void Main(string[] args) {
		try
		{
			/* -------------------------------------------------------------------- */
			/*      Initialize srs                                                  */
			/* -------------------------------------------------------------------- */
			SpatialReference src = new SpatialReference("");
			src.ImportFromProj4("+proj=latlong +datum=WGS84 +no_defs");
			Console.WriteLine( "SOURCE IsGeographic:" + src.IsGeographic() + " IsProjected:" + src.IsProjected() );
			SpatialReference dst = new SpatialReference("");
			dst.ImportFromProj4("+proj=somerc +lat_0=47.14439372222222 +lon_0=19.04857177777778 +x_0=650000 +y_0=200000 +ellps=GRS67 +units=m +no_defs");
			Console.WriteLine( "DEST IsGeographic:" + dst.IsGeographic() + " IsProjected:" + dst.IsProjected() );
			/* -------------------------------------------------------------------- */
			/*      making the transform                                            */
			/* -------------------------------------------------------------------- */
			CoordinateTransformation ct = new CoordinateTransformation(src, dst);
			double[] p = new double[3];
			p[0] = 19; p[1] = 47; p[2] = 0;
			ct.TransformPoint(p);
			Console.WriteLine("x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
			ct.TransformPoint(p, 19.2, 47.5, 0);
			Console.WriteLine("x:" + p[0] + " y:" + p[1] + " z:" + p[2]);
		}
		catch (Exception e)
		{
			Console.WriteLine("Error occurred: " + e.Message);
		}
	}
}