GTiff RGB files c/w colour palette report 3 bands with GCI_Palette, GCI_Green, and GCI_Blue

[mpd]

We have a photometric=RGB file (from a reputable national mapping agency) that also has a colour table (no, I don't know either).

When read with GDAL, we get three bands: GCI_Palette, GCI_Green, and GCI_Blue

GTiffRasterBand::GTiffRasterBand has the following:

    if( poDS->poColorTable != NULL && nBand == 1 ) 
        eBandInterp = GCI_PaletteIndex;
    else if( poDS->nPhotometric == PHOTOMETRIC_RGB 

An old (pre-svn) version of the file (geotiff.cpp) has this commit message:

 * Revision 1.157  2006/02/17 15:46:06  fwarmerdam
 * Ensure that an image is considered paletted if it has a palette,
 * even if the photometric interpretation is wrong.

(That is svn revision 9189.)

The problem is that band 1 is being considered in isolation. Could the dataset, after creating all of the bands, revert a photometric=RGB image with a colour table from palette-GB to RGB?

[Jukka Rahkonen]

Should we really try to make GDAL to handle such weird images? I would rather close this ticket as "wontfix".

[Even Rouault]

We could perhaps do something, but this would require at least examining a sample to have a better sense of what is going on. Closing as it seems to have fallen out of the radar of the reporter