//TODO: improve hashing system
private int HashCoordSystem(ICoordinateSystem sys)
{
if (sys is IProjectedCoordinateSystem)
{
return(HashProjectedCoordinateSystem(sys as IProjectedCoordinateSystem));
}
if (sys is IGeographicCoordinateSystem)
{
return(HashGeographicCoordinateSystem(sys as IGeographicCoordinateSystem));
}
if (sys is IGeocentricCoordinateSystem)
{
return(HashGeocentricCoordinateSystem(sys as IGeocentricCoordinateSystem));
}
throw new ArgumentException(string.Format("No hash routine for coordinate sys '{0}'", sys.GetType()));
}