[postgis-devel] [PostGIS] #362: Geography needs an extent aggregate function

PostGIS trac at osgeo.org
Tue Dec 29 10:14:51 PST 2009

#362: Geography needs an extent aggregate function
  Reporter:  robe         |       Owner:  pramsey       
      Type:  enhancement  |      Status:  new           
  Priority:  medium       |   Milestone:  PostGIS Future
 Component:  postgis      |     Version:  trunk         
Resolution:               |    Keywords:                
Comment (by pramsey):

 And after ST_Extent, what's the next function that's going to be called?
 And after that? Extent is very ill-defined on the sphere. Think about a
 pole-encircling polygon or a date-line traversing linestring. What's the
 proper extent? How is it interpreted? If you want a half-assed extent,
 then call ST_Extent(thecolumn::geometry), right?

Ticket URL: <http://trac.osgeo.org/postgis/ticket/362#comment:3>
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