8-bit Geotiff ColorInterp=Gray and WCS questions

[Nuno GIL]

Hi listers,

I'm trying to retrieve a 8-bit geotiff from the
mapserver wcs.
I've defined, in the map file, the geotiff IMAGEMODE
as PC256, so I get a "paletted" tiff from the wcs.
Is there any other IMAGEMODE that I can define in
order to get a simple gray image without a colour
palette?

Width GDALINFO one displays ColorInterp=Gray while the
other displays ColorInterp=Palette with the 256 colour
palette.

I would also like to ask if there is any way of
limiting the size of the user defined bbox on the wcs
so the user can only D/L a limited portion of the data
at each time in order not to mess the network.

In the mosaic we are serving there are some holes
without image. Can the user get a message back if
those areas are selected?

Cheers,
Nuno



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