DESCRIPTION
i.spectral displays spectral response at user specified
locations in images.
NOTES
This script needs gnuplot to be installed.
EXAMPLE
Analysis of LANDSAT TM7 channels (North Carolina dataset):
g.region rast=lsat7_2002_10 -p
i.spectral -g raster=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 \
coordinates=636069,215440,637958,223393,633277,223605

Spectral plot of 3 different land cover types: (1) water, (2) green vegetation, and (3) highway
North Carolina sample dataset:
g.region rast=lsat7_2002_10 -p
LIST=`g.mlist type=rast pattern="lsat7_2002_[1-5,7]0" separator=","`
i.spectral raster=$LIST coordinates=637502.25,221744.25
This will search all LANDSAT map for 2002 but select only the B, G, R,
NIR, and MIR channels.
SEE ALSO
d.what.rast
d.where
r.what
AUTHOR
Markus Neteler
Francesco Pirotti
Last changed: $Date: 2012-09-09 21:11:23 +0200 (Sun, 09 Sep 2012) $