[GRASS-user] how to count number of occurrences of a specific category value in the neighborhood of a given pixel

Hamish hamish_b at yahoo.com
Wed Nov 23 18:36:09 EST 2011

Marcello wrote:
> As always, there is surely a better way in GRASS
> (probably one single command),

"many roads lead to Rome" as the saying goes..

> but you could binarize your map (1 for your
> desired category and zero for everything else)

for this step, r.reclass will make things much
faster and save disk space too.

> and then use r.neighbors method=sum 
> size=desired_neighborhood. 
> The result would be the desired count.


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