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i.spectralgrass - Online in the Cloud

Run i.spectralgrass in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command i.spectralgrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

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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