[postgis-tickets] [PostGIS] #2911: ST_Rescale changes extent

[PostGIS]

#2911: ST_Rescale changes extent
--------------------+-------------------------------------------------------
 Reporter:  strk    |       Owner:  dustymugs    
     Type:  defect  |      Status:  new          
 Priority:  high    |   Milestone:  PostGIS 2.1.4
Component:  raster  |     Version:  2.1.x        
 Keywords:          |  
--------------------+-------------------------------------------------------
 According to documentation ( http://postgis.net/docs/RT_ST_Rescale.html ),
 ST_Rescale should only change the pixel scale, by retaining (or at most
 slightly enlarging) the extent of a raster.

 While it mostly work that way, I've found this input to be handled
 differently, by retaining the same scale and halving the extent instead
 (!!)

 {{{
 0100000100000000000000F03F000000000000F0BF0000000000000000000000000000000000000000000000000000000000000000000000000A000A00640000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
 }}}

 Its metadata:

 {{{
 upperleftx | 0
 upperlefty | 0
 width      | 10
 height     | 10
 scalex     | 1
 scaley     | -1
 skewx      | 0
 skewy      | 0
 srid       | 0
 numbands   | 1
 }}}

 Can be created with:

 {{{
 SELECT ST_AddBand(
  ST_MakeEmptyRaster(10, 10, 0, 0, 1, -1, 0, 0, 0),
  1, '8BUI', 0, 0
 );
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2911>
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