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

[PostGIS]

#2911: ST_Rescale changes extent
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 Reporter:  strk    |       Owner:  dustymugs    
     Type:  defect  |      Status:  new          
 Priority:  high    |   Milestone:  PostGIS 2.1.4
Component:  raster  |     Version:  2.1.x        
 Keywords:          |  
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Comment(by strk):

 In other words, ST_Rescale does not change the scale, but just the size,
 although the parameters are floating point numbers. Noticeable are the
 "default geotransform" notices:

 {{{
 pg21=# with data as (
    SELECT ST_AddBand(
           ST_MakeEmptyRaster(10, 10, 0, 0, 1, -1, 0, 0, 0),
           1, '8BUI', 0, 0
         ) r
  ),
  meta as (
    SELECT st_metadata(st_rescale(r,2.0,-2.0)) m from data
  ) select (m).* from meta;
 NOTICE:  Raster has default geotransform. Adjusting metadata for use of
 GDAL Warp API
 CONTEXT:  SQL function "st_rescale" statement 1
 -[ RECORD 1 ]--
 upperleftx | 0
 upperlefty | 0
 width      | 5
 height     | 5
 scalex     | 1
 scaley     | -1
 skewx      | 0
 skewy      | 0
 srid       | 0
 numbands   | 1

 }}}

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2911#comment:1>
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