i.spectral(1grass) | GRASS GIS User's Manual | i.spectral(1grass) |
i.spectral - Displays spectral response at user specified locations in group or images.
imagery, querying, raster, multispectral
i.spectral
i.spectral --help
i.spectral [-cgt] [group=name]
[subgroup=name] [raster=name[,name,...]]
coordinates=east,north[,east,north,...]
[output=name] [format=string]
[--overwrite] [--help] [--verbose] [--quiet]
[--ui]
i.spectral displays spectral response at user specified locations in images.
This script requires the launch of one of the supported monitors (cairo, png, ps) or gnuplot to be installed.
Analysis of LANDSAT TM7 channels (North Carolina dataset):
g.region raster=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 raster=lsat7_2002_10 -p LIST=`g.list type=raster pattern="lsat7_2002_[1-5,7]0" separator=","` d.mon start=cairo output=plot.png i.spectral raster=$LIST coordinates=637502.25,221744.25 d.mon stop=cairoThis will search all LANDSAT map for 2002 but select only the B, G, R, NIR, and MIR channels.
d.where, r.what, Cairo driver, PNG driver, PS driver (Postscript)
Markus Neteler
Francesco Pirotti
Available at: i.spectral source code (history)
Accessed: Sunday Jan 22 07:37:42 2023
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