I want to speed up layer rendering so I want to build image pyramids. I use DOQ
files, convert them to GeoTiff using mrsidecode and import those raster tiffs
as layers. When I try to build the pyramids from layer properties 50 % of the
time I qgis crashes:
numerous error messages of different kind
ERROR 1: TIFFReadEncodedTile() failed.
ERROR 1: /home/mike/GIS/Dallas/DOQ-NAIP/d329602_3.tif:DumpModeDecode: Not
enough data for scanline 1152
ERROR 1: TIFFReadEncodedTile() failed.
ERROR 1: /home/mike/GIS/Dallas/DOQ-NAIP/d329602_3.tif:DumpModeDecode: Not
enough data for scanline 1280
ERROR 1: TIFFReadEncodedTile() failed.
ERROR 1: /home/mike/GIS/Dallas/DOQ-NAIP/d329602_3.tif:DumpModeDecode: Not
enough data for scanline 1408
ERROR 1: TIFFReadEncodedTile() failed.
ERROR 1: /home/mike/GIS/Dallas/DOQ-NAIP/d329602_3.tif:DumpModeDecode: Not
enough data for scanline 1536
ERROR 1: TIFFReadEncodedTile() failed.
Warning 1: TIFFReadDirectory:/home/mike/GIS/Dallas/DOQ-NAIP/d329602_3.tif:
Wrong StripByteCounts field, ignoring and calculating from imagelength
Segmentation fault
The numerous error messages of different kinds also come up when qgis does
*not* crush when building pyramids, but sooner or later I get segfault with
seemingly no difference in preceeding numerous error messages of different
kinds
What is the problem and/or how can I track it down?
Mikhail.
P.S. QGis compiled from 0.9.1 source w/ gcc 4.2.2 on AMD Opteron Linux kernel
2.6.22.18-server-1mdv #1 SMP, same problem also exists in Intel Xeon dual core
same Linux
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