Hi I am using GDAL (actually though the c# swig bindings) to load some GeoJSON files with features of type LINESTRING25D and POLYGON.
I am using the .IsRing() method to detect if the line features are closed. This works as intended on the features that are linestrings. But for some reason it is NOT working on the linear rings from the polygons, even though they are : 1 Coming out as Geometry objects of type LINESTRING25D - exactly as the linestrings are, and 2 Are closed in that I can see that the last vertex is exactly the same as the first vertex. Do you have any idea what would cause this? I am trying to understand what would be different in a LINESTRING25D Geometry object that is part of a POLYGon Geometry object as opposed to one that is not! Thanks Paul
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