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

Marcello Gorini gorini at gmail.com
Wed Nov 23 11:41:16 EST 2011


> Does anyone see an easy way to count the number of times a specific
> category value occurs in a given neighborhood of a central pixel ?
As always, there is surely a better way in GRASS (probably one single
command), but you could binarize your map (1 for your desired category and
zero for everything else) and then use r.neighbors method=sum

The result would be the desired count.

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