[GRASS-user] Using a polygon as a Mask

[Christian Schwartze]

There is no way to use a vector geometry in mapcalculator (or mapcalc) 
directly, hence, you have to convert it to raster before.

Christian.

--------------------------------------------------
From: "António Rocha" <antonio.rocha at deimos.com.pt>
Sent: Thursday, May 27, 2010 2:08 PM
To: "GRASS user list" <grass-user at lists.osgeo.org>
Subject: [GRASS-user] Using a polygon as a Mask

> Greetings
>
> I have polygon that I want to use to define an for which I want to 
> calculate some indicators (almost as a mask). Is it possible to use it 
> directly in mapcalculator or do I have to convert it to RASTER and only 
> then I can use it in mapcalculator as a mask?
>
> Thanks
>
> Best regards,
> Antonio
>
>
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