Hi Jonathan, You can try setting CPL_DEBUG=ON as a config option (see https://trac.osgeo.org/gdal/wiki/ConfigOptions). Some specific formats/drivers also have additional debug settings, but not GeoTIFF.
Rob :) On 17 February 2016 at 13:51, Jonathan Moules <jonathan-li...@lightpear.com> wrote: > Hi List, > I'm running the following four queries against the same data (a packbits > compressed geotiff): > > gdaladdo -r average --config COMPRESS_OVERVIEW JPEG --config > PHOTOMETRIC_OVERVIEW YCBCR i1.tif 2 4 8 16 > > gdaladdo -r average --config PHOTOMETRIC_OVERVIEW YCBCR i2.tif 2 4 8 16 > > gdaladdo -r average i3.tif 2 4 8 16 > > gdaladdo -r average --config COMPRESS_OVERVIEW PACKBITS i4.tif 2 4 8 16 > > All four outputs are binary identical and contain the requested internal > overviews. > > I can think of several possible reasons for this outcome (different > compression type seems most probable), but invisibly failing to action > semantically valid flags isn't good for raising or debugging errors. Does > GDAL have a "verbose" mode? I can't seem to find one. > > Cheers, > Jonathan > > _______________________________________________ > gdal-dev mailing list > gdal-dev@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev > -- Chief Technical Officer Koordinates +44 759 987 3480 <+44%20759%209873480> / koordinates.com / @koordinates <https://twitter.com/koordinates>
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