[gdal-dev] Support for Terrain-RGB

[Even Rouault]

>
> There's nothing especially terrain (or topography) about this afaics, 
> and utility seems like the right approach rather than creating a 
> format variant.

Actually Frédéric's intersting remark abou potential usage with "gdal 
raster tile" would actually make the driver approach a better 
choice....   unless we would extend "gdal raster tile" to accept a 
pipeline to go to create a final tile from a 'raw' one, like 'gdal 
raster tile --tile-pipeline="read ! encode-rgb --offset=-10000 ! write 
--of PNG" --extension png  in.tif out_directory' .

But a ENCODE_RGB driver approach is more simple than implementing that.

Even

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