[postgis-tickets] [PostGIS] #5401: ST_Difference silently giving us wrong results

PostGIS trac at osgeo.org
Wed Jun 14 12:32:08 PDT 2023


#5401: ST_Difference silently giving us wrong results
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  Reporter:  Lars Aksel Opsahl  |      Owner:  pramsey
      Type:  defect             |     Status:  new
  Priority:  medium             |  Milestone:  PostGIS 3.3.4
 Component:  postgis            |    Version:  3.3.x
Resolution:                     |   Keywords:
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Comment (by pramsey):

 For what it's worth I just ran the original example (not Sandro's SQL) and
 it output what (at least visually) seem to be perfectly correct results
 (no crazy precision reduction) against GEOS 3.12. At a minimum, the mixed
 collection update in 3.12 at least allows processing to conclude.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5401#comment:9>
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