[GRASS-user] extract polygon from raster

[Jachym Cepicky]

r.to.vect feature=area ?


jachym
On Wed, Jun 07, 2006 at 10:42:59AM +0100, Ana Soares wrote:
> hello :-)
> 
> Imagine I have a raster image with a colored area. I want to obtain a
> polygon describing the limits of it.
> In particular, my case is the following : I have an aerial photo of a fire
> (georeferenced jpeg, so raster format) and I want to obtain the limits of
> the fire area.
> 
> Does grass allow me to do such task ? And how ?
> 
> Thanks :-)

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Jachym Cepicky
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