[postgis-devel] [PostGIS] #296: Implement ST_GetBBox function for raster

[PostGIS]

#296: Implement ST_GetBBox function for raster
-----------------------+----------------------------------------------------
 Reporter:  mloskot    |       Owner:  pracine        
     Type:  task       |      Status:  new            
 Priority:  medium     |   Milestone:  wktraster 0.1.6
Component:  wktraster  |     Version:                 
 Keywords:             |  
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 Function ST_GetBBox is part of [wiki:WKTRaster/SpecificationWorking01
 Objective 0.1.6e] and shall be implemented:
 {{{
 ST_GetBBox(raster) -> polygon geometry
 }}}

 In the original presentation [http://www.cef-
 cfr.ca/uploads/Membres/WKTRasterSpecifications1.0.ppt
 WKTRasterSpecifications1.0.ppt], slides 31, 32, 33 present what
 ST_AsPolygon(), ST_Shape(), ST_GetBBOX() and ST_Envelop() should return.

 Functions ST_GetBBOX(), ST_Envelop() and ST_Shape() are necessary to
 implement an elementary version of ST_Intersect() and ST_AsPolygon() is
 necessary to implement an elementary version of ST_Intersection()
 returning geometries only.

 We definitely need to first write the complete specs of these functions in
 order to agree on what they are supposed to do. Feedback welcome. Please,
 post your comments below.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/296>
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