/// <summary>
///
/// </summary>
/// <param name="coordinateSystem"></param>
/// <param name="tokenizer"></param>
/// <returns></returns>
private static GeoAPI.CoordinateSystems.ICoordinateSystem ReadCoordinateSystem(string coordinateSystem,
GisSharpBlog.NetTopologySuite.IO.WktStreamTokenizer tokenizer)
{
GeoAPI.CoordinateSystems.ICoordinateSystem returnCS = null;
switch (coordinateSystem)
{
/*case "VERT_CS":
* IVerticalCoordinateSystem verticalCS = ReadVerticalCoordinateSystem(tokenizer);
* returnCS = verticalCS;
* break;*/
case "GEOGCS":
GeoAPI.CoordinateSystems.IGeographicCoordinateSystem geographicCS = ReadGeographicCoordinateSystem(tokenizer);
returnCS = geographicCS;
break;
case "PROJCS":
GeoAPI.CoordinateSystems.IProjectedCoordinateSystem projectedCS = ReadProjectedCoordinateSystem(tokenizer);
returnCS = projectedCS;
break;
case "COMPD_CS":
/* ICompoundCoordinateSystem compoundCS = ReadCompoundCoordinateSystem(tokenizer);
* returnCS = compoundCS;
* break;*/
case "GEOCCS":
case "FITTED_CS":
case "LOCAL_CS":
throw new InvalidOperationException(String.Format("{0} coordinate system is not recongized.", coordinateSystem));
}
return(returnCS);
}
private void Initialize()
{
GisSharpBlog.NetTopologySuite.Geometries.PrecisionModel precisionModel =
new GisSharpBlog.NetTopologySuite.Geometries.PrecisionModel(GeoAPI.Geometries.PrecisionModels.Floating);
SharpMap.CoordinateSystems.CoordinateSystem wgs84 = SharpMap.CoordinateSystems.GeographicCoordinateSystem.WGS84;
GeoAPI.CoordinateSystems.ICoordinateSystemFactory cFac = new SharpMap.CoordinateSystems.CoordinateSystemFactory();
//Create geographic coordinate system based on the WGS84 datum
GeoAPI.CoordinateSystems.IEllipsoid ellipsoid = cFac.CreateFlattenedSphere("WGS 84",
6378137, 298.257223563, SharpMap.CoordinateSystems.LinearUnit.Metre);
GeoAPI.CoordinateSystems.IHorizontalDatum datum = cFac.CreateHorizontalDatum("WGS_1984",
GeoAPI.CoordinateSystems.DatumType.HD_Geocentric, ellipsoid, null);
GeoAPI.CoordinateSystems.IGeographicCoordinateSystem gcsWGS84 = cFac.CreateGeographicCoordinateSystem("WGS 84",
SharpMap.CoordinateSystems.AngularUnit.Degrees, datum, SharpMap.CoordinateSystems.PrimeMeridian.Greenwich,
new GeoAPI.CoordinateSystems.AxisInfo("Lon", GeoAPI.CoordinateSystems.AxisOrientationEnum.East),
new GeoAPI.CoordinateSystems.AxisInfo("Lat", GeoAPI.CoordinateSystems.AxisOrientationEnum.North));
List <GeoAPI.CoordinateSystems.ProjectionParameter> parameters =
new List <GeoAPI.CoordinateSystems.ProjectionParameter>();
parameters.Add(new GeoAPI.CoordinateSystems.ProjectionParameter("latitude_of_origin", 0));
parameters.Add(new GeoAPI.CoordinateSystems.ProjectionParameter("central_meridian", 117));
parameters.Add(new GeoAPI.CoordinateSystems.ProjectionParameter("scale_factor", 0.9996));
parameters.Add(new GeoAPI.CoordinateSystems.ProjectionParameter("false_easting", 500000));
parameters.Add(new GeoAPI.CoordinateSystems.ProjectionParameter("false_northing", 10000000));
GeoAPI.CoordinateSystems.IProjection projection = cFac.CreateProjection("Transverse Mercator", "Transverse Mercator", parameters);
GeoAPI.CoordinateSystems.IProjectedCoordinateSystem utmWGS84 = cFac.CreateProjectedCoordinateSystem("WGS84 UTM Zone 50S",
gcsWGS84, projection, SharpMap.CoordinateSystems.LinearUnit.Metre,
new GeoAPI.CoordinateSystems.AxisInfo("East", GeoAPI.CoordinateSystems.AxisOrientationEnum.East),
new GeoAPI.CoordinateSystems.AxisInfo("North", GeoAPI.CoordinateSystems.AxisOrientationEnum.North));
int SRID_utm50 = Convert.ToInt32(utmWGS84.AuthorityCode); //UTM50 SRID
SharpMap.CoordinateSystems.Transformations.CoordinateTransformationFactory ctFact =
new SharpMap.CoordinateSystems.Transformations.CoordinateTransformationFactory();
_Transform = ctFact.CreateFromCoordinateSystems(utmWGS84, wgs84);
_UTM50Factory = new GisSharpBlog.NetTopologySuite.Geometries.GeometryFactory(precisionModel, SRID_utm50);
}
