[postgis-tickets] [PostGIS] #2920: [raster] ST_Union(raster): ERROR: rt_raster_from_two_rasters: The two rasters provided do not have the same alignment

[PostGIS]

#2920: [raster] ST_Union(raster): ERROR:  rt_raster_from_two_rasters: The two
rasters provided do not have the same alignment
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 Reporter:  strk      |       Owner:  dustymugs    
     Type:  defect    |      Status:  new          
 Priority:  critical  |   Milestone:  PostGIS 2.1.4
Component:  raster    |     Version:  2.1.x        
 Keywords:            |  
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Comment(by dustymugs):

 The bug is in the manual. ST_Union is a wrapper around ST_MapAlgebra.
 Alignment is required. It's no different than ST_Union(geom, geom)
 requiring the geometries to have the same SRID. Alignment is ensuring that
 the two rasters are in the same coordinate system.

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Ticket URL: <http://trac.osgeo.org/postgis/ticket/2920#comment:3>
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