measuring areas

[Agustin Lobo]

El amigo Alejandro Hinojosa escribe:

>
>
> I would like to know if there is way of
> measuring areas in GRASS, different of
> d.measure, so we can use a vector file
> with labeled areas.
>
> Alejandro Hinojosa.
>

To get a list of patch sizes:
1. use r.clump. You'll get a map with your patches numbered.
2. use r.stats. You'll get a list with patch number and size.

To get a vector file you just have to use r.poly and v.support. With
d.what.vect you get patch sizes interactivellty.

It is also very easy to make an script to filter out patches of (or
less than) a certain size.

Agus.