1i.spectral(1)               GRASS GIS 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]           [subgroup=name]
16       [raster=name[,name,...]]        coordinates=east,north[,east,north,...]
17       [output=name]   [format=string]   [--overwrite]  [--help]   [--verbose]
18       [--quiet]  [--ui]
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20   Flags:
21       -c
22           Show sampling coordinates instead of numbering in the legend (valid
23           for -g flag)
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25       -g
26           Use gnuplot for display
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28       -t
29           output to text file
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31       --overwrite
32           Allow output files to overwrite existing files
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34       --help
35           Print usage summary
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37       --verbose
38           Verbose module output
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40       --quiet
41           Quiet module output
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43       --ui
44           Force launching GUI dialog
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46   Parameters:
47       group=name
48           Name of input imagery group
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50       subgroup=name
51           Name of input imagery subgroup
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53       raster=name[,name,...]
54           Name of input raster map(s)
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56       coordinates=east,north[,east,north,...] [required]
57           Coordinates
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59       output=name
60           Name for output image is valid for -g (or text file for -t flag)
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62       format=string
63           Graphics format for output file (valid for -g flag)
64           Options: png, eps, svg
65           Default: png
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DESCRIPTION

68       i.spectral displays spectral response at user  specified  locations  in
69       images.
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NOTES

72       This  script  requires  the  launch  of  one  of the supported monitors
73       (cairo, png, ps) or gnuplot to be installed.
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EXAMPLE

76       Analysis of LANDSAT TM7 channels (North Carolina dataset):
77       g.region raster=lsat7_2002_10 -p
78       i.spectral -g raster=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 \
79                  coordinates=636069,215440,637958,223393,633277,223605
80       Spectral plot of 3 different land cover types:  (1)  water,  (2)  green
81       vegetation, and (3) highway
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83       North Carolina sample dataset:
84       g.region raster=lsat7_2002_10 -p
85       LIST=`g.list type=raster pattern="lsat7_2002_[1-5,7]0" separator=","`
86       d.mon start=cairo output=plot.png
87       i.spectral raster=$LIST coordinates=637502.25,221744.25
88       d.mon stop=cairo
89       This  will search all LANDSAT map for 2002 but select only the B, G, R,
90       NIR, and MIR channels.
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SEE ALSO

93        d.where, r.what, Cairo driver, PNG driver, PS driver (Postscript)
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AUTHORS

96       Markus Neteler
97       Francesco Pirotti
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SOURCE CODE

100       Available at: i.spectral source code (history)
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102       Accessed: Saturday Jan 21 20:41:00 2023
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104       Main index | Imagery index | Topics index | Keywords index |  Graphical
105       index | Full index
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107       © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
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111GRASS 8.2.1                                                      i.spectral(1)
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