[Mapserver-users] colored tiff forced to greyscale

[Frank Warmerdam]

pierre.giraud3 at free.fr wrote:
>  hello list,
> 
> Didn't find any post answering my problem, probably didn't choose the suitable 
> keywords.
> 
> Is there any way to force mapserver to draw a 8-bit (or 24-bits) raster layer 
> in greyscale ?

Pierre,

In fact, no there is no way of declaring a request in the mapfile that
a given raster should ignore it's color table.  When I run into this I
normally reprocess the file to have no color table.  This could be
accomplished by converting to a color-table free format such as PAux (raw)
format.

eg.

gdal_translate -of PAux myfile.tif myfile_grey.raw
gdal_translate -of GTiff myfile_grey.raw myfile_grey.tif

rm -f myfile_grey.raw myfile_grey.aux

Best regards,
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