[postgis-devel] [PostGIS] #671: ST_isempty( GEOMETRYCOLLECTION(GEOMETRYCOLLECTION(EMPTY)) ) returns false

[PostGIS]

#671: ST_isempty( GEOMETRYCOLLECTION(GEOMETRYCOLLECTION(EMPTY)) ) returns false
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 Reporter:  strk     |       Owner:  pramsey      
     Type:  defect   |      Status:  new          
 Priority:  medium   |   Milestone:  PostGIS 1.5.3
Component:  postgis  |     Version:  1.5.X        
 Keywords:           |  
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Comment(by pramsey):

 A collection of empty geometries has ngeoms > 0, but from a spatial
 coverage point of view is just as empty as a non empty thing. We mainly
 want to be careful not to short circuit functions that work against
 numelements when numelements is > 0, even when the contents are empty.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/671#comment:1>
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