private void ParseDatum(IDictionary <String, String> parameters, DatumParameters datumParam)
{
String towgs84;
if (parameters.TryGetValue(Proj4Keyword.towgs84, out towgs84))
{
double[] datumConvparameters = ParseToWGS84(towgs84);
datumParam.SetDatumTransform(datumConvparameters);
}
String code;
if (parameters.TryGetValue(Proj4Keyword.datum, out code))
{
Datum.Datum datum = registry.GetDatum(code);
if (datum == null)
{
throw new ArgumentException("Unknown datum: " + code);
}
datumParam.Datum = datum;
}
string grids;
if (parameters.TryGetValue(Proj4Keyword.nadgrids, out grids))
{
datumParam.SetNadGrids(grids);
}
}
public CoordinateReferenceSystem Parse(String name, String[] args)
{
if (args == null)
{
return(null);
}
IDictionary <String, String> parameters = CreateParameterMap(args);
Proj4Keyword.CheckUnsupported(parameters.Keys);
DatumParameters datumParam = new DatumParameters();
ParseDatum(parameters, datumParam);
ParseEllipsoid(parameters, datumParam);
Datum.Datum datum = datumParam.Datum;
Ellipsoid ellipsoid = datum.Ellipsoid;
// TODO: this makes a difference - why?
// which is better?
// Ellipsoid ellipsoid = datumParam.getEllipsoid();
Projection.Projection proj = ParseProjection(parameters, ellipsoid);
return(new CoordinateReferenceSystem(name, args, datum, proj));
}
public void SetDatumTransform(double[] datumTransform)
{
_datumTransform = datumTransform;
// force new Datum to be created
_datum = null;
}
/// <summary>
/// Initializes a new instance of the <see cref="CoordinateSystem" /> class.
/// </summary>
/// <param name="datum"> The datum. </param>
protected CoordinateSystem(Datum.Datum datum)
{
Datum = datum;
}
