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.
SEE ALSO¶
d.what.rast
d.where
r.what
AUTHOR¶
Markus Neteler
Francesco Pirotti
Last changed: $Date: 2011-11-08 10:42:51 +0100 (Tue, 08 Nov 2011) $
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