[Qgis-user] New raster provider: opening larger tiff files takes forever

[Andreas Neumann]

 yes - I can also confirm that it works like before. Thank you for 
 fixing the issue.

 I still have problems when I click on the histogram tab, it also takes 
 forever. Usually I'll kill QGIS before the histogram calculation 
 finished, because I am impatient - but this problem existed already 
 before the new raster provider was merged.

 Do other people have the same issue?

 Thanks,
 Andreas

 On Fri, 11 Mar 2011 08:36:28 +0000, Giovanni Manghi wrote:
> Most of the problems are resolved with the revision available today.
>
> cheers
>
> -- Giovanni --
>
> On Thu, 2011-03-10 at 10:48 +0100, Andreas Neumann wrote:
>> Hi,
>>
>>  Like others, I am experiencing severe problems with the new raster
>>  provider. The Geotiff already has pyramids. With the previous 
>> raster
>>  provider it opened in less than a second, in the new raster 
>> provider it
>>  takes forever (several minutes). There must be something wrong.
>>
>>  In the console I see:
>>
>>  ERROR 6: Attempt to call SetGeoTransform() on a read-only GeoTIFF 
>> file.
>>  0...10...20...30...40...50...60...70...80...90...100 - done.
>>
>>  and the progress message appears several times.
>>
>>  To me it looks like the new raster provides does not recognize the
>>  existing gdal pyramids and tries to create new pyramids while 
>> opening
>>  the file?
>>
>>  Am I doing somehting wrong?
>>
>>  -
>>
>>  I tested on Ubuntu 10.04 64bit, current trunk.
>>
>>  Thanks,
>>  Andreas
>>

-- 
 --
 Andreas Neumann
 Böschacherstrasse 10A
 8624 Grüt (Gossau ZH)
 Switzerland