private static ICoordinateTransformation Proj2Proj(IProjectedCoordinateSystem source, IProjectedCoordinateSystem target)
{
ConcatenatedTransform mathTransform = new ConcatenatedTransform();
CoordinateTransformationFactory factory = new CoordinateTransformationFactory();
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(source, source.GeographicCoordinateSystem));
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(source.GeographicCoordinateSystem, target.GeographicCoordinateSystem));
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(target.GeographicCoordinateSystem, target));
return new CoordinateTransformation(source, target, TransformType.Transformation, mathTransform, string.Empty, string.Empty, -1L, string.Empty, string.Empty);
}
/// <summary>
/// Geographic to geographic transformation
/// </summary>
/// <remarks>Adds a datum shift if nessesary</remarks>
/// <param name="source"></param>
/// <param name="target"></param>
/// <returns></returns>
private ICoordinateTransformation CreateGeog2Geog(IGeographicCoordinateSystem source, IGeographicCoordinateSystem target)
{
if (source.HorizontalDatum.EqualParams(target.HorizontalDatum))
{
return new CoordinateTransformation(source, target, TransformType.Conversion, new Topology.CoordinateSystems.Transformations.GeographicTransform(source, target), string.Empty, string.Empty, -1L, string.Empty, string.Empty);
}
CoordinateTransformationFactory factory = new CoordinateTransformationFactory();
CoordinateSystemFactory factory2 = new CoordinateSystemFactory();
IGeocentricCoordinateSystem targetCS = factory2.CreateGeocentricCoordinateSystem(source.HorizontalDatum.Name + " Geocentric", source.HorizontalDatum, LinearUnit.Metre, source.PrimeMeridian);
IGeocentricCoordinateSystem system2 = factory2.CreateGeocentricCoordinateSystem(target.HorizontalDatum.Name + " Geocentric", target.HorizontalDatum, LinearUnit.Metre, source.PrimeMeridian);
ConcatenatedTransform mathTransform = new ConcatenatedTransform();
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(source, targetCS));
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(targetCS, system2));
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(system2, target));
return new CoordinateTransformation(source, target, TransformType.Transformation, mathTransform, string.Empty, string.Empty, -1L, string.Empty, string.Empty);
}
private static ICoordinateTransformation Proj2Geog(IProjectedCoordinateSystem source, IGeographicCoordinateSystem target)
{
if (source.GeographicCoordinateSystem.EqualParams(target))
{
return new CoordinateTransformation(source, target, TransformType.Transformation, CreateCoordinateOperation(source.Projection, source.GeographicCoordinateSystem.HorizontalDatum.Ellipsoid).Inverse(), string.Empty, string.Empty, -1L, string.Empty, string.Empty);
}
ConcatenatedTransform mathTransform = new ConcatenatedTransform();
CoordinateTransformationFactory factory = new CoordinateTransformationFactory();
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(source, source.GeographicCoordinateSystem));
mathTransform.CoordinateTransformationList.Add(factory.CreateFromCoordinateSystems(source.GeographicCoordinateSystem, target));
return new CoordinateTransformation(source, target, TransformType.Transformation, mathTransform, string.Empty, string.Empty, -1L, string.Empty, string.Empty);
}
