[postgis-devel] [PostGIS] #621: Problem with finding intersections with geography types

PostGIS trac at osgeo.org
Wed Apr 25 11:20:23 PDT 2012

#621: Problem with finding intersections with geography types
  Reporter:  infinitynsk  |       Owner:  pramsey      
      Type:  defect       |      Status:  closed       
  Priority:  high         |   Milestone:  PostGIS 1.5.4
 Component:  postgis      |     Version:  1.5.X        
Resolution:  invalid      |    Keywords:               
Changes (by pramsey):

  * status:  new => closed
  * resolution:  => invalid


 You can't just run a "contains" test in geometry and expect it to return
 the right answer, because lines in geometry are not in the same place as
 in geography. Geometry lines are linear interpolations in platte carre.
 Geography lines are great circle arcs over a sphere. They don't go over
 the same places.

Ticket URL: <http://trac.osgeo.org/postgis/ticket/621#comment:2>
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