i.spectralgrass - Online in the Cloud

PROGRAM:

NAME

i.spectral - Displays spectral response at user specified locations in group or images.

KEYWORDS

imagery, querying, raster, multispectral

SYNOPSIS

i.spectral
i.spectral --help
i.spectral [-cg] [group=name] [raster=name[,name,...]]
coordinates=east,north[,east,north,...] [output=name] [format=string] [--overwrite]
[--help] [--verbose] [--quiet] [--ui]

Flags:
-c
Show sampling coordinates instead of numbering in the legend

-g
Use gnuplot for display

--overwrite
Allow output files to overwrite existing files

--help
Print usage summary

--verbose
Verbose module output

--quiet
Quiet module output

--ui
Force launching GUI dialog

Parameters:
group=name
Name of input imagery group

raster=name[,name,...]
Name of input raster map(s)

coordinates=east,north[,east,north,...] [required]
Coordinates

output=name
Name for output image

format=string
Graphics format for output file
Options: png, eps, svg
Default: png

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 raster=lsat7_2002_10 -p
i.spectral -g input=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=","`
i.spectral input=$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.

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