On jeudi 16 février 2017 08:44:22 CET Kurt Schwehr wrote: > Even, > > If a format can have a combination of point, lines, and polygons in a > layer, should the layer class set wkbGeometryCollection?
No it shoud return wkbUnknown. wkbGeometryCollection is for geometries whose WKT is like GEOMETRYCOLLECTION( POINT(0 1), LINESTRING(2 3,4 5)) > And if so, does > that imply Z is okay or not okay? There's some ambiguity around this. It might be prudent to declare wkbUnknown | wkb25DBit if 3D geometries might be returned. > I see there is > also wkbGeometryCollectionM and wkbGeometryCollectionZM, but > no wkbGeometryCollectionZ. And I see wkbGeometryCollection25D is old and > shouldn't be used, yes? wkbGeometryCollection25D can be used as wkbGeometryCollectionZ (when that makes sense). It is just that for compatibility reasons we have not renamed the constant and changed its value to be conformant to the ISO values. Even -- Spatialys - Geospatial professional services http://www.spatialys.com
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