MemSQL geospatial union of polygons -
will new memsql version able calculate union of polygons? example calcuate border of 2 adjacent or intercepting polygons?
+----+ | | | +-+--+ +--+-+ | | | +----+
to
+----+ | | | +--+ +--+ | | | +----+
memsql 4 includes topological functions (eg, geography_intersects()) return boolean, , measurement functions distance , length. not yet have constructor functions intersection(), output polygon describe. it's on roadmap, though.
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