[GRASS-user] extract polygon from raster

[Ana Soares]

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 :-)
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/grass-user/attachments/20060607/ed6e663a/attachment.html