[QGIS-trac] Re: [Quantum GIS] #1530: JPG rasterfile fails to load

Quantum GIS qgis at qgis.org
Sun Feb 15 10:58:22 EST 2009


#1530: JPG rasterfile fails to load
-----------------------------------------------------+----------------------
        Reporter:  goggi                             |         Owner:  ersts                
            Type:  bug                               |        Status:  assigned             
        Priority:  major: does not work as expected  |     Milestone:  Version 1.0.1        
       Component:  Rasters                           |       Version:  1.0.0                
      Resolution:                                    |      Keywords:  Raster jpg load fails
Platform_version:  1.0.0-kore                        |      Platform:  Windows              
        Must_fix:  No                                |   Status_info:  0                    
-----------------------------------------------------+----------------------
Changes (by ersts):

  * status:  new => assigned
  * owner:  nobody => ersts

Comment:

 Replying to [comment:1 dthonon]:
 > I have the same problem. To reproduce it :
 > - create any JPEG image, for example using gimp fill with a texture. I
 tried 1000*1000, 5000*5000 and 10000*10000 and none worked correctly
 > - add it as raster to QGIS
 > - only the top part is displayed
 > - pyramids are also truncated to the top part.

 I am actually having a problem reproducing this, but we have seen similar
 behavior in the past. Can anyone post a link to an image that is causing
 this behavior so we can be working with the same data?


 dthonon: Can you explain how you created your pyramids? Are they internal?
 A while ago I removed the ability for QGIS to build pyramids internally
 for JPEGs because it often ended in data corruption that looked like the
 screenshot above (but the corrupted image was also red).

-- 
Ticket URL: <http://trac.osgeo.org/qgis/ticket/1530#comment:2>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats


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