[postgis-devel] [PostGIS] #1173: TopologyException from intersection of valid geography

PostGIS trac at osgeo.org
Tue Feb 7 16:07:50 PST 2012

#1173: TopologyException from intersection of valid geography
  Reporter:  jgilman  |       Owner:  strk         
      Type:  defect   |      Status:  closed       
  Priority:  medium   |   Milestone:  PostGIS 2.0.0
 Component:  postgis  |     Version:  trunk        
Resolution:  wontfix  |    Keywords:               
Changes (by pramsey):

  * status:  reopened => closed
  * resolution:  => wontfix


 The problem is that the ST_Intersection function is not actually a
 geography implementation, it's a geography wrapper around a reprojection.
 And for sufficiently large objects the reprojection is into mercator which
 means you end up with an invalid geometry and boom, everything is over at
 that point. The answer is a more subtle hack in reprojection-wrappers for
 geography, I think.

Ticket URL: <http://trac.osgeo.org/postgis/ticket/1173#comment:9>
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