/// <summary>
/// 将几何对象从投影转换到84
/// </summary>
/// <returns></returns>
public static bool ConvertGeoPrjToEarth(this Geometry SourceGeo, PrjCoordSysType coordSysType)
{
CoordSysTransParameter cstp = new CoordSysTransParameter();
return(CoordSysTranslator.Convert(SourceGeo
, new PrjCoordSys(coordSysType)
, new PrjCoordSys(PrjCoordSysType.EarthLongitudeLatitude)
, new CoordSysTransParameter()
, CoordSysTransMethod.GeocentricTranslation));
}
/// <summary>
/// 地理坐标向投影坐标转换
/// </summary>
/// <param name="point3Ds"></param>
/// <returns></returns>
private Point3Ds coordinateTrans3D(Point3Ds point3Ds)
{
Point2Ds point2Ds = new Point2Ds();
foreach (Point3D p3d in point3Ds)
{
Point2D point2D = new Point2D(p3d.X, p3d.Y);
point2Ds.Add(point2D);
}
//Assume Wgs1984WorldMercator as target project coordinate system
PrjCoordSys prjTarget = new PrjCoordSys(PrjCoordSysType.Wgs1984Utm50N);
bool b = CoordSysTranslator.Forward(point2Ds, prjTarget);
Point3Ds result = new Point3Ds();
for (int i = 0; i < point2Ds.Count; i++)
{
Point3D point3D = new Point3D(point2Ds[i].X, point2Ds[i].Y, point3Ds[i].Z);
result.Add(point3D);
}
return(result);
}
/// <summary>
/// 转换主函数
/// Main function of transformation
/// </summary>
/// <param name="type">对应不同的投影类型 Projection type</param>
/// <returns>转换后投影的描述信息 The description information of projection after transformed</returns>
public String TransformPrj(int type)
{
try
{
m_srcMapControl.Map.Layers.Clear();
this.CopyDataset(m_bufPrjDataName);
PrjCoordSys gaussPrjSys = this.GetTargetPrjCoordSys(type);
Boolean result = CoordSysTranslator.Convert(m_processDataset, gaussPrjSys, new CoordSysTransParameter(), CoordSysTransMethod.GeocentricTranslation);
m_srcMapControl.Map.Layers.Add(m_processDataset, true);
m_srcMapControl.Map.Center = m_srcMapControl.Map.Bounds.Center;
m_srcMapControl.Map.Scale = m_srcMapControl.Map.Scale;
m_srcMapControl.Map.Refresh();
return(this.GetPrjStr(m_processDataset));
}
catch (Exception ex)
{
Trace.WriteLine(ex.Message);
}
return(null);
}
