[postgis-devel] [PostGIS] #1958: ST_Intersects(geography) returns incorrect result when called multiple times

[PostGIS]

#1958: ST_Intersects(geography) returns incorrect result when called multiple
times
---------------------------+------------------------------------------------
 Reporter:  realityexists  |       Owner:  pramsey      
     Type:  defect         |      Status:  new          
 Priority:  medium         |   Milestone:  PostGIS 2.1.0
Component:  postgis        |     Version:  2.0.x        
 Keywords:                 |  
---------------------------+------------------------------------------------

Comment(by pramsey):

 Example that dodges having force the cache:
 {{{

 WITH objs AS
 (
  SELECT
   'LINESTRING(22.88333 41.96667,21.32667 42.13667)'::geography AS line,
   'POLYGON((22.94472 41.34667,22.87528 41.99028,22.87389 41.98472,22.87472
 41.98333,22.94472 41.34667))'::geography AS border
 )
 SELECT ST_Distance(line, border), _ST_DistanceTree(line, border)
 FROM objs;
 }}}
 Basically we have a big disagreement about distance, presumably because
 the containment test is failing on the tree side.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/1958#comment:1>
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.