Hi Pamela,
I know about that image processing tutorial and I've read it already. But I
didn't find anything about the spectral signatures.
The tutorial I have is "GRASS Tutorial: Image Processing" by Victoria
Harmon and Michael Shapiro. Is this the one you were refering to or is
there another one?
Anyway, thanks for your suggestion!
Cristina Seabra
cis@fct.unl.pt