[postgis-tickets] [PostGIS] #2422: geography regression difference ST_DWithin

PostGIS trac at osgeo.org
Sun Aug 11 20:12:17 PDT 2013


#2422: geography regression difference ST_DWithin
---------------------+------------------------------------------------------
 Reporter:  robe     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  high     |   Milestone:  PostGIS 2.1.0
Component:  postgis  |     Version:  2.1.x        
 Keywords:           |  
---------------------+------------------------------------------------------

Comment(by pramsey):

 No, simpler, just
 {{{
 SELECT
 someId, _ST_DistanceUnCached(), _ST_DistanceTree()
 FROM yourtable
 WHERE _ST_DistanceUnCached() != _ST_DistanceTree();
 }}}
 See? The problem is the algorithms are returning different answers for a
 very few example geographies, and this will both isolate the ones that are
 failing and give a hint what the different answers are.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2422#comment:11>
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.


More information about the postgis-tickets mailing list