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, querying, raster, multispectral
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SYNOPSIS

13       i.spectral
14       i.spectral --help
15       i.spectral  [-cgt]   [group=name]    [raster=name[,name,...]]   coordi‐
16       nates=east,north[,east,north,...]     [output=name]     [format=string]
17       [--overwrite]  [--help]  [--verbose]  [--quiet]  [--ui]
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19   Flags:
20       -c
21           Show sampling coordinates instead of numbering in the legend
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23       -g
24           Use gnuplot for display
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26       -t
27           output to text file
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29       --overwrite
30           Allow output files to overwrite existing files
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32       --help
33           Print usage summary
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35       --verbose
36           Verbose module output
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38       --quiet
39           Quiet module output
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41       --ui
42           Force launching GUI dialog
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44   Parameters:
45       group=name
46           Name of input imagery group
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48       raster=name[,name,...]
49           Name of input raster map(s)
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51       coordinates=east,north[,east,north,...] [required]
52           Coordinates
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54       output=name
55           Name for output image (or text file for -t)
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57       format=string
58           Graphics format for output file
59           Options: png, eps, svg
60           Default: png
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DESCRIPTION

63       i.spectral displays spectral response at user  specified  locations  in
64       images.
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NOTES

67       This script needs gnuplot to be installed.
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EXAMPLE

70       Analysis of LANDSAT TM7 channels (North Carolina dataset):
71       g.region raster=lsat7_2002_10 -p
72       i.spectral -g input=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 \
73                  coordinates=636069,215440,637958,223393,633277,223605
74       Spectral  plot  of  3  different land cover types: (1) water, (2) green
75       vegetation, and (3) highway
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77       North Carolina sample dataset:
78       g.region raster=lsat7_2002_10 -p
79       LIST=`g.list type=raster pattern="lsat7_2002_[1-5,7]0" separator=","`
80       i.spectral input=$LIST coordinates=637502.25,221744.25
81       This will search all LANDSAT map for 2002 but select only the B, G,  R,
82       NIR, and MIR channels.
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SEE ALSO

85        d.where, r.what
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AUTHOR

88       Markus Neteler
89       Francesco Pirotti
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91       Last changed: $Date: 2014-12-27 00:33:06 +0100 (Sat, 27 Dec 2014) $
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SOURCE CODE

94       Available at: i.spectral source code (history)
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96       Main  index | Imagery index | Topics index | Keywords index | Graphical
97       index | Full index
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99       © 2003-2019 GRASS Development Team, GRASS GIS 7.4.4 Reference Manual
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103GRASS 7.4.4                                                      i.spectral(1)