[postgis-devel] [PostGIS] #472: Missing ST_IsValid for Geography Types

[PostGIS]

#472: Missing ST_IsValid for Geography Types
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 Reporter:  rfcmedia     |       Owner:  pramsey      
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 1.5.2
Component:  postgis      |     Version:  1.5.X        
 Keywords:               |  
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 There is no ST_IsValid for geography types.

 I do not think casting a geography as a geometry and then running it
 through ST_IsValid will yield correct results either.

 Consider a polygon (-170 0, 170 0, 178 5, 178 -5, -170 0) in degrees on a
 spherical surface.  This is not a valid polygon as there is clearly an
 intersection between two lines at (178, 0) but this would be considered a
 valid polygon if it were cast as a geometry.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/472>
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