[postgis-tickets] [PostGIS] #4763: Docs that use ST_BuildArea are wrong but they are more beautiful than the right docs would be
PostGIS
trac at osgeo.org
Mon Oct 5 15:08:32 PDT 2020
#4763: Docs that use ST_BuildArea are wrong but they are more beautiful than the
right docs would be
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Reporter: robe | Owner: pramsey
Type: defect | Status: new
Priority: medium | Milestone: PostGIS 3.0.3
Component: postgis | Version: 3.0.x
Resolution: | Keywords:
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Comment (by strk):
Ok I think I got it: the non-noded input in the documentation would have
resulted in only 2 polygons out of Polygonizer, and the iterative
symdifference would result in the given image.
Now, with the new algorithm, you just never get that result from that
input with ST_BuildArea.
But you can get it with ST_MakeValid, if the input is an invalid
MULTIPOLYGON
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4763#comment:3>
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