[postgis-tickets] [PostGIS] #2203: [raster]: Can't read out_db jpg in some cases

PostGIS trac at osgeo.org
Mon Feb 18 15:19:34 PST 2013


#2203: [raster]: Can't read out_db jpg in some cases
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  Reporter:  robe    |       Owner:  dustymugs    
      Type:  defect  |      Status:  assigned     
  Priority:  medium  |   Milestone:  PostGIS 2.1.0
 Component:  raster  |     Version:  trunk        
Resolution:          |    Keywords:  history      
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Comment(by dustymugs):

 There is definitely something weird going on in Windows.

 Can you rerun ST_Summarystats() after making sure that the file
 back.jpg.aux.xml (should live with back.jpg) is removed and/or not
 present?

 What I am looking for in the debug output is something like

 {{{
 NOTICE:  [rt_api.c:rt_raster_from_gdal_dataset:9183] GDAL Band 1 stats:
 0.000000, 255.000000, 98.720363, 81.487081
 }}}

 That line is the output from GDALComputeRasterStatistics() upon the band
 data.  It will return the cached stats from *.aux.xml if it is avaiable,
 hence why I ask that you delete that file if it exists.  By not having
 cached stats, GDAL is forced to go use the raw data to compute the stats.
 I'm eliminating as many possible failure points as I can...

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/2203#comment:40>
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