[postgis-devel] [PostGIS] #348: [wktraster] st_raster_envelope & st_raster_to_box2d return different results

PostGIS trac at osgeo.org
Wed Dec 16 02:32:33 PST 2009

#348: [wktraster] st_raster_envelope & st_raster_to_box2d return different
  Reporter:  pracine    |       Owner:  pracine        
      Type:  defect     |      Status:  new            
  Priority:  high       |   Milestone:  WKTRaster 0.1.6
 Component:  wktraster  |     Version:  trunk          
Resolution:             |    Keywords:                 
Comment (by mloskot):

 The difference (WKT Raster Windows build by Regina from 2009-08-10
 17:41:12) is as follows:

  * SELECT ST_AsText(st_raster_envelope(rast)) FROM mytable
 POLYGON((-90 90,-72 90,-72 72,-90 72,-90 90))

  * SELECT ST_AsText(st_raster_to_box2d(rast)) FROM mytable
 POLYGON((-90 72,-90 90,-72 90,-72 72,-90 72))

 The two geometries are almost identical. The only difference is which is
 the first vertex, upper left vs lower left corner.

 What does the "should return two identical lines" mean? Which line is the
 one that should be returned?

Ticket URL: <http://trac.osgeo.org/postgis/ticket/348#comment:1>
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