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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 [-cg] [group=string] [raster=string[,string,...]] [output=string] coords=east,north[,east,north,...] [--verbose] [--quiet]
Flags:
- -c
- Label with coordinates instead of numbering
- -g
- Use gnuplot for display
- --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
- coords=east,north[,east,north,...]
- Coordinates
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.
SEE ALSO
d.what.rast
d.where
r.what
AUTHOR
Markus Neteler
Francesco Pirotti
Last changed: $Date: 2008-08-14 23:16:42 -0700 (Thu, 14 Aug 2008) $
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