[gdal-dev] 1.5.0b2 geotiff and 1-bit compression..

[Frank Warmerdam]

Cicconetti, Bob wrote:
> Something appears to have broken creation of 1-bit Geotiffs relatively 
> recently.. It works with the 1.5dev snapshot included with QGIS, and 
> with 1.4.2.0, but fails with FWTools2.03 and the beta2 binaries for Win32.
> 
>  
> 
> $ /cygdrive/c/Program\ Files/FWTools2.0.3/bin/gdal_translate.exe  -co 
> NBITS=1 -co COMPRESS=PACKBITS worc_test21.img worc_test22.tif
> 
> Input file size is 363341, 362736
> 
> 0ERROR 1: One bit raster bands are read-only.
> 
> ERROR 1: One bit raster bands are read-only.
> 
> […]
> 
>  
> 
> It does produce an output file, but it is completely blank.
> 
>  
> 
> worc_test21.img is a ~16GB, 1-bit HFA file. Quite sparse.. compresses 
> down to about 250 MB with CCITT FAX4. Not something I can distribute as 
> test material, though.

Bob,

I have confirmed the problem and filed it as:

   http://trac.osgeo.org/gdal/ticket/2115

I will fix it this evening and I suspect we will need to issue a new RC
including the fix.

Best regards,
-- 
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I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | President OSGeo, http://osgeo.org