[postgis-devel] [PostGIS] #1806: Extremely slow and CPU-intensive ST_MakeValid (ST_BuildArea) case

PostGIS trac at osgeo.org
Sat May 12 12:02:08 PDT 2012


#1806: Extremely slow and CPU-intensive ST_MakeValid (ST_BuildArea) case
----------------------+-----------------------------------------------------
  Reporter:  strk     |       Owner:  strk         
      Type:  defect   |      Status:  closed       
  Priority:  high     |   Milestone:  PostGIS 2.0.1
 Component:  postgis  |     Version:  2.0.x        
Resolution:  fixed    |    Keywords:               
----------------------+-----------------------------------------------------

Comment(by hugoledoux):

 By design we chose not to return "unused" geometries. So if an inner rings
 collapses to a line we do not return it to the user.

 We always return one MULTIPOLYGON; if the input polygon is only a line for
 instance then we return an empty MULTIPOLYGON.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1806#comment:20>
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