Frank, I don't know if it's of interrest here, but I always put a gdalwarp'ed output file through gdal_translate to get a "clean" file. Beside some other things, this step rearranges the stripes and, IIRC, some older versions of gdalwarp had problems in writing compressed NBITS=1 files.
But just recently some ESRI (ArcGIS 9.x) users claimed about problems reading files written by gdal_translate with NBITS=1 and PHOTOMETRIC=MINISWHITE. The picture is shown inverse and they have to manipulate the palette to get the right view. Looking at this, I concluded that the combination of MINISWHITE *and* the presence of a palette causes this behaviour. It seems that ArcGIS inverts the palette in this case. After reading TIFF6.0 specification I think this is wrong. Otherwise there seems to be no need for a palette if PHOTOMETRIC isn't "PALLETTE". Because there is no chance to get this problem corrected in ArcGIS, I decided to patch geotiff.cpp to write out a palette only if PHOTOMETRIC_INTERPRETATION is "PALETTE". I don't know, if this will have any other side effects, but for the moment it fixes the ArcGIS problem. If this path isn't the right one, IMO we need at least an configuration option like "PALETTE=(YES/NO)" to prevent palette writing. Hope this helps a little bit. Regards Uwe _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
