i.spectral(1)

1i.spectral(1)                 Grass User's Manual                i.spectral(1)
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NAME

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

10       imagery, raster, multispectral
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SYNOPSIS

13       i.spectral
14       i.spectral help
15       i.spectral   [-imc]    [group=string]      [raster=string[,string,...]]
16       [output=string]   [--verbose]  [--quiet]
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18   Flags:
19       -i
20           Use image list and not group
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22       -m
23           Select multiple points
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25       -c
26           label with coordinates instead of numbering
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28       --verbose
29           Verbose module output
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31       --quiet
32           Quiet module output
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34   Parameters:
35       group=string
36           group input
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38       raster=string[,string,...]
39           raster input maps
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41       output=string
42           write output to PNG image
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DESCRIPTION

45       i.spectral  displays  spectral  response at user specified locations in
46       images.
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NOTES

49       This script needs gnuplot to be installed.
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EXAMPLE

52       To analyze a time series of maps, run:
53       d.rast map_1
54       LIST=`g.mlist type=rast mapset=timeseries pat="map_*" | sort -t '_'  -k
55       2 -n | tr '\n' ','| sed 's+,$++g'`
56       i.spectral -i rast=$LIST
57         This will search all maps in the mapset 'timeseries' which match have
58       the 'map_' prefix and order by a number following this prefix  (day  of
59       the  year etc). The user is then asked to click into a map position and
60       the resulting pixel values of all matching maps are drawn in  the  gnu‐
61       plot output.
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AUTHOR

69       Markus Neteler
70       Francesco Pirotti
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72       Last changed: $Date: 2006-04-29 16:13:04 +0200 (Sat, 29 Apr 2006) $
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74       Full index
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76       © 2003-2008 GRASS Development Team
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80GRASS 6.3.0                                                      i.spectral(1)