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.list 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: $Date$