[Qgis-developer] Re: [Qgis-user] Building image pyramids -> qgis crashing

Maciej Sieczka tutey at o2.pl
Sun Apr 13 10:25:25 EDT 2008

Oleg Gusev pisze:
> Am Samstag 12 April 2008 17:33:37 schrieb Maciej Sieczka:
>> Paolo Cavallini pisze:
>>> I confirm the crash.
>> Paolo
>> What GDAL version are you using?

>   i have understood  Frank's answer on the grass mailing list
>   as 'this libtiff bug is well known and will not be fixed'. 

I could not find the phrase in GRASS ML archives. Can you post a link? 
Can you provide an example TIFF that crashes QGIS while building pyramids?

>   Maybe it's time to disable building tiff overviews in qgis.

FWIW I would certainly vote for building external overviews instead of 
internal. This would prevent eventual problems related to in-place 
modification of TIFF file, improve data compatibility and prevent data 
redundancy. External overviews in *.ovr files are no worse as to 
performance or whatever, while they have advantages.


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