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Conversion from ("non-vacuous") geography to geometry

Nov 10, 2011 at 1:19 AM
There seems to be an asymmetry in the spatial tools provided. Given a geometry with an SRID we can convert to a geography with the same SRID using MakeValidGeographyFromGeometry What about the reverse process? There is a symmetric pair of functions for conversion when the items are "vacuous", which I >think< means that they have no SRID. There is also an asymmetry in the spatial aggregations: we have GeographyUnionAggregate but no GeometryUnionAggregate. Is this forthcoming or it is redundant?