[postgis-tickets] [PostGIS] #4541: ST_ConcaveHull returns a "geometrycollection" type instead of the expected "polygon"

[PostGIS]

#4541: ST_ConcaveHull returns a "geometrycollection" type instead of the expected
"polygon"
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  Reporter:  v89461   |      Owner:  robe
      Type:  defect   |     Status:  reopened
  Priority:  high     |  Milestone:  PostGIS 2.5.5
 Component:  postgis  |    Version:  2.5.x
Resolution:           |   Keywords:
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Comment (by kszafran):

 Replying to [comment:11 robe]:
 > @kszafran
 >
 > Which platform are you running on?  Wondering if by chance you are able
 to test the new ST_ConcaveHull.  If you are on windows I have precompiled
 builds in experimental section - https://postgis.net/windows_downloads/  -
 the 3.3.0alpha1 builds.
 >
 > The new ST_ConcaveHull will use the new native GEOS support introduced
 in GEOS 3.11 (not yet released).  At anyrate I'll try with your example
 later this week to make sure it solves your issue -
 https://postgis.net/docs//manual-3.3/ST_ConcaveHull.html
 >
 > on a related topic, there is also support for alphashapes introduced in
 PostGSI 3.3.0 SFCGAL 1.4.1
 >
 > https://postgis.net/docs//manual-3.3/ST_OptimalAlphaShape.html
 > https://postgis.net/docs//manual-3.3/ST_AlphaShape.html

 I'm using AWS Aurora, so unfortunately I can't test arbitrary PostGIS
 versions.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4541#comment:12>
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