[QGIS-trac] [Quantum GIS] #3735: GDAL stats not used

[Quantum GIS]

#3735: GDAL stats not used
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   Reporter:  rblazek           |              Owner:  rblazek      
       Type:  bug               |             Status:  new          
   Priority:  minor: annoyance  |          Milestone:  Version 1.7.0
  Component:  Rasters           |            Version:  Trunk        
   Keywords:                    |   Platform_version:               
   Platform:  All               |           Must_fix:  No           
Status_info:  0                 |  
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 I'm not sure if this behavior is expected or I am missing something.

 I have a 1 band raster dataset (an elevation DEM) in TIF format.  It has
 statistics computed from "gdalinfo -stats mydata.tif"   However, when I
 open
 it in QGIS (both 1.6 and 1.7 trunk), and look at the Metadata tab in Layer
 properties, there are two sections that contain band stats information.
 The
 first section is labeled "Band 1" and lists the same stats as found using
 gdalinfo.  The second section is labeled "Band" and says "No stats
 collected
 yet" for band 1.  QGIS has to create the stats when I apply a color map or
 stretch.  For large rasters, this takes a while, and must be done each
 time
 it's used in QGIS.

 Has anyone experienced this behavior?  Is this expected?  Is there a way
 to
 let gdal compute all the stats that QGIS needs?  Thanks.

 reported: http://lists.osgeo.org/pipermail/qgis-
 user/2011-March/011550.html

-- 
Ticket URL: <http://trac.osgeo.org/qgis/ticket/3735>
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