The spatial reference of the GeoDataset.
[Visual Basic 6.0] Property SpatialReference As ISpatialReference
[Visual Basic .NET] Public ReadOnly Property SpatialReference As ISpatialReference
[C#] public ISpatialReference SpatialReference {get;}
[Java] public ISpatialReference getSpatialReference() throws IOException, AutomationException
[C++] HRESULT get_SpatialReference( ISpatialReference** spref );