Is it possible to make advanced spatial queries like erase a bbox from a polygon query? So that you get a polygon-query with a hole in it? As far as I know, it's just possible to union different bboxs, so you get a kind of ring-query. asked 13 Feb '13, 14:29  Mattes_tili edited 13 Feb '13, 14:30 |
One Answer:
Yes, the unions are all that is possible at the moment. But you can use union also on polygon queries which allows in principle an arbitrary geometry by stitching polygons. answered 14 Feb '13, 12:50  Roland Olbricht |
Meanwhile this could be solved by the difference operator. See the other answer to this question.