[GRASS-user] reclass raster with all unique values?

Paulo van Breugel p.vanbreugel at gmail.com
Fri Jul 5 15:13:00 PDT 2013

You could convert the raster layer to a vector layer. In the attribute
table you'll have a column with the raster value (the watershed values) and
the cat column, which gives you the unique identifier for each polygon.
Next you just convert the vector back to raster using the cat column as
raster value.

But depending on your data, you might also want to check out r.clump or
r.clump2 (I think the latter is a add-on).


On Fri, Jul 5, 2013 at 11:03 PM, Stephen Sefick <sas0025 at auburn.edu> wrote:

> I have a raster map with watersheds that are the same value.  Is there an
> easy way to reclass the map with every distinc basin to have a unique value?
> many thanks,
> --
> Stephen Sefick
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