[GRASS-user] categories in raster map

[FAROUX STEPHANIE]

FAROUX STEPHANIE wrote:
> Moritz Lennert wrote:
>> On 26/02/09 11:47, FAROUX STEPHANIE wrote:
>>> Hello,
>>> I see the function r.cats which allows to read categories of a 
>>> raster map, but how can i define these attributes? Should i pass by 
>>> a vector map? In the database menu, it doesn't seem possible to add 
>>> a table for a raster map.
>>
>> Raster maps have categories and labels. Categories have to be 
>> numerical, labels can be anything. Each pixel needs to have a 
>> category value (or NULL) and optionally you can have one (and only 
>> one) label per category value.
>>
>> BTW, r.cats is now replaced by r.category.
>>
>> If you want to link a cell with many attributes, you will have to use 
>> vector grids (v.mkgrid or r.to.vect as you suggestà).
>>
>> Moritz
>>
> Thank you. And how do you put labels on categories please?
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I use r.reclass that's it?