/// <summary>
/// 该方法用于将投影坐标转换为地理坐标
/// </summary>
/// <param name="position">该值指示投影坐标</param>
/// <returns>该值指示地理坐标</returns>
public static EVPoint ProToGeo(EVPoint position)
{
if (!isInitPath) {
InitPath();
}
double[] d = new double[3] { position.X, position.Y, 0 };
EVPoint v = CoordianteConvert(new EVPoint(d[0], d[1]), ProCS, GeoCS);
return v;
}
/// <summary>
/// 该方法用于将地理坐标转换成投影坐标
/// </summary>
/// <param name="geoPosition">地理坐标</param>
/// <returns>投影坐标</returns>
public static EVPoint GeoToPro(EVPoint geoPosition)
{
if (!isInitPath)
{
InitPath();
}
double[] d = new double[3] { geoPosition.X, geoPosition.Y, 0 };
EVPoint v = CoordianteConvert(new EVPoint(d[0], d[1]), GeoCS, ProCS);
return v;
}
/// <summary>
/// 该方法用于将某一坐标从一个坐标系统转换成另一个坐标系统的坐标
/// </summary>
/// <param name="input">该值指示待转换坐标</param>
/// <param name="fromCS">该值指示待转换坐标的坐标系统</param>
/// <param name="toCS">该值指示目标坐标系统</param>
/// <returns>该值指示转换后的结果</returns>
private static EVPoint CoordianteConvert(EVPoint input, ICoordinateSystem fromCS, ICoordinateSystem toCS)
{
try
{
List<double[]> linput = new List<double[]>();
linput.Add(new double[] { input.X, input.Y, 0 });
CoordinateTransformationFactory ctfac = new CoordinateTransformationFactory();
ICoordinateTransformation trans = ctfac.CreateFromCoordinateSystems(fromCS, toCS);
List<double[]> loutput = trans.MathTransform.TransformList(linput);
EVPoint output = new EVPoint();
double[] dout = loutput[0];
output.X = dout[0];
output.Y = dout[1];
//output.Z = dout[2];
return output;
}
catch (Exception ex)
{
Console.WriteLine("坐标转换错误：CoordinateConvert(...)", ex.ToString());
return null;
}
}
