Matt, The TIFF driver also supports writing 1-bit TIFF images. See NBITS in the Creation Options section.
For example: gdal_translate source.tif output_1bit.tif -co NBITS=1 When reading a 1-bit TIFF image, GDAL will expand each bit as a byte. When writting a 1-bit TIFF image, GDAL will write 1 as the bit value if the pixel value is non-zero, or 0 as the bit value if the pixel value is zero. Le Friday 19 December 2008 21:16:53 Matt Klaric, vous avez écrit : > Does anyone have any experience using 1-bit TIFF images with GDAL? The > GeoTIFF file format page (http://www.gdal.org/frmt_gtiff.html) indicates > that they can be read, but is silent on the issue of writing them. I'm > interested in writing them using GDAL, but it appears that the 1-bit data > type is not valid in GDAL( > http://gdal.org/gdal_8h.html#22e22ce0a55036a96f652765793fb7a4). Does > anyone have any experience with this? How difficult would it be to modify > the TIFF driver to handle these? > > Thanks, > Matt Klaric _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev