GRASS GIS: i.spectral

NAME

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

KEYWORDS

imagery, raster, multispectral

SYNOPSIS

i.spectral
i.spectral help
i.spectral [-imc] [group=string] [raster=string[,string,...]] [output=string] [--verbose] [--quiet]

Flags:

-i: Use image list and not group
-m: Select multiple points
-c: label with coordinates instead of numbering
--verbose: Verbose module output
--quiet: Quiet module output

Parameters:

group=string: group input
raster=string[,string,...]: raster input maps
output=string: write output to PNG image

DESCRIPTION

i.spectral displays spectral response at user specified locations in images.

NOTES

This script needs gnuplot to be installed.

EXAMPLE

To analyze a time series of maps, run:

d.rast map_1
LIST=`g.mlist type=rast mapset=timeseries pat="map_*" | sort -t '_' -k 2 -n | tr '\n' ','| sed 's+,$++g'`
i.spectral -i rast=$LIST

This will search all maps in the mapset 'timeseries' which match have the 'map_' prefix and order by a number following this prefix (day of the year etc). The user is then asked to click into a map position and the resulting pixel values of all matching maps are drawn in the gnuplot output.

AUTHOR

Markus Neteler
Francesco Pirotti

Last changed: $Date: 2006-04-29 07:13:04 -0700 (Sat, 29 Apr 2006) $

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