[postgis-tickets] [PostGIS] #4556: st_asmvtgeom sometimes produces leaking polygons (postgis 3.0)

[PostGIS]

#4556: st_asmvtgeom sometimes produces leaking polygons (postgis 3.0)
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  Reporter:  anneb    |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.0.0
 Component:  postgis  |    Version:
Resolution:           |   Keywords:
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Comment (by Algunenano):

 It seems this happens because the polygon becomes invalid after the calls
 to simplify it:
 {{{
         /* Remove all non-essential points (under the output resolution)
 */
         lwgeom_remove_repeated_points_in_place(lwgeom, res);
         lwgeom_simplify_in_place(lwgeom, res, preserve_collapsed);
 }}}

 Before doing anything the polygon is valid, and if I remove these lines
 the output is correct (see mvt_default.png vs mvt_nosimplification.png).

 Maybe it's time to revisit https://trac.osgeo.org/postgis/ticket/4149 and
 maybe remove the simplification step for wagyu at least.

-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/4556#comment:1>
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