[Community] GeometryCollections with multiple polygons

[Harasty, Daniel J]

Sean:

You mentioned:

> I'm reluctant to make heterogeneous geometry collections first-class objects in Shapely, 
> mostly because GEOS (the lib under Shapely) generally disallows any operations on them.

> For what it's worth, Shapely will happily write invalid multipolygons to WKT....

> Thanks to the design of WKT, it's trivial to serialize a list of geometries to WKT like this:
> "GEOMETRYCOLLECTION (%s)" % ", ".join(g.wkt for g in geometries)

> Will that get you by?

Thanks!  The second tip (doing the "GEOMETRYCOLLECTION".join([...])) was my "fallback plan".  

I'll investigate the "intentional invalid Multipolygon" trick, too.  

I do need to be able to read and reconstitute whatever serialization I choose (in Python with Shapely), so I'll have to make sure that Shapely can "round trip" either of those options.  Also, I do have the additional requirements that whatever I create has to be readable/bufferable by our system's SQL server.

If either of the above work, then I'm good.

Thanks again,

Dan