[postgis-tickets] [PostGIS] #3843: st_RemoveRepeatedPoints misses duplicate in polygon

[PostGIS]

#3843: st_RemoveRepeatedPoints misses duplicate in polygon
-------------------------------------+---------------------------
 Reporter:  crispond                 |      Owner:  pramsey
     Type:  defect                   |     Status:  new
 Priority:  medium                   |  Milestone:  PostGIS 2.3.4
Component:  postgis                  |    Version:  2.2.x
 Keywords:  st_RemoveRepeatedPoints  |
-------------------------------------+---------------------------
 Apologies if this has already been fixed.  I couldn't find a reference to
 it.

 st_RemoveRepeatedPoints appears to be removing the first duplicate in a
 polygon, but not the second.  The function works correctly in a
 linestring, and correctly if you add a third duplicate.

 Perhaps, it is due to the small size of the geometry.


 {{{

 --Does not remove point (2 3):
 select st_astext(st_RemoveRepeatedPoints('POLYGON((0 0,1 1,1 1,2 3,2 3,1
 34,0 0))'::geometry));

 --Works correctly:
 select st_astext(st_RemoveRepeatedPoints('LINESTRING(0 0,1 1,1 1,2 3,2 3,1
 34,0 0)'::geometry));

 --Adding a third repetition also works correctly:
 select st_astext(st_RemoveRepeatedPoints('POLYGON((0 0,1 1,1 1,2 3,2 3,1
 34,1 34,0 0))'::geometry));

 }}}

 Thanks!

 -cris

--
Ticket URL: <https://trac.osgeo.org/postgis/ticket/3843>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.