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2 votes

Converting multipart MultiPolygon to self-intersecting polygon in PostGIS

As already established, there's no built-in method for what you're trying to achieve. What's available is made with the opposite goal in mind: going from invalid to valid, not the other way around. ...
Zegarek's user avatar
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0 votes

Converting multipart MultiPolygon to self-intersecting polygon in PostGIS

So, let's try to take the easy way out, and if I understand your question correctly, you just need to convert multipolygons to polygons. The original geodata is drawn in Figure 1 based on the geodata ...
Cyril Mikhalchenko's user avatar
4 votes

Converting multipart MultiPolygon to self-intersecting polygon in PostGIS

PostGIS implements the OGC geometry specification, which prohibits self-intersecting polygons. Some other systems use a different topology, which uses self-touching rings to represent holes that ...
dr_jts's user avatar
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