[postgis-devel] [PostGIS] #830: ST_UnaryUnion

[PostGIS]

#830: ST_UnaryUnion
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 Reporter:  strk         |       Owner:  strk         
     Type:  enhancement  |      Status:  new          
 Priority:  medium       |   Milestone:  PostGIS 2.0.0
Component:  postgis      |     Version:               
 Keywords:               |  
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Comment(by strk):

 r6816 contains implementation and testing.
 Misses docs.

 Notable things for the documentation:
 * ST_UnaryUnion(<invalid_polygon>) will not give you a valid polygon, but
 return the input untouched
 * UnaryUnion unions the _components_ of a geometry, assuming each
 component is valid
 * ST_UnaryUnion(ST_Collect(the_geom)) is equivalent to ST_Union(the_geom)

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/830#comment:2>
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