[postgis-tickets] [PostGIS] #2495: geography && large_bbox fails

[PostGIS]

#2495: geography && large_bbox fails
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 Reporter:  strk     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 2.1.1
Component:  postgis  |     Version:  2.1.x        
 Keywords:           |  
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Comment(by pramsey):

 If the geometry was made of small arcs then yes the result would be
 different. It might still be *wrong* from a visual/user point of view, if
 the user is drawing straight lines on a flat map, since the small lines
 would still be great circles and wouldn't necessarily be isomorphic to the
 lines the user is seeing on her screen.

 You'll have to be careful of your terminology when talking about "bounding
 boxes" in geography. The core bounding box, the one used for the index
 operators, is a bounding volume in geocentric space. You are perhaps
 talking about a 2d box drawn on a flat map, which isn't going to map
 easily 1:1 to a geographic shape, for the reasons noted in the previous
 paragraph.

 You might find it useful to plug your boxes into the great circle mapper
 web site to get a feel for their "real world" implications in great circle
 land. http://www.gcmap.com/

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2495#comment:9>
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