[mapserver-users] Using Raster Attribute Table (RAT) with WCS

[Even Rouault]

Luí­s,

> I have a WCS serving a few thematic maps, where each cell represents a
> class, like in a land use or ecological map. The maps include a Raster
> Attribute Table (RAT) which essentially relates cell values to classes
> (e.g. 1 - Grassland).
> 
> What would be the correct way of providing the RAT to users of these
> services? As far as I can tell, this is not supported in the WCS core. Is
> it somehow considered in an extension?
> 
> Besides WCS, would it be possible to publish the RAT through MapServer in
> some other way?

One possibility would be for the WCS code in MapServer to return a .zip with let's say a .tif 
file and a GDAL .aux.xml file with a GDAL RAT object serialized in it.
The input RAT could be in a .aux.xml sidecar of the input file too. MapServer would have to 
set it from the source to the target

Even


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