.TH i.spectral 1grass "" "GRASS 7.6.0" "Grass User's Manual"
.SH NAME
\fI\fBi.spectral\fR\fR  \- Displays spectral response at user specified locations in group or images.
.SH KEYWORDS
imagery, querying, raster, multispectral
.SH SYNOPSIS
\fBi.spectral\fR
.br
\fBi.spectral \-\-help\fR
.br
\fBi.spectral\fR [\-\fBcgt\fR]  [\fBgroup\fR=\fIname\fR]   [\fBsubgroup\fR=\fIname\fR]   [\fBraster\fR=\fIname\fR[,\fIname\fR,...]]  \fBcoordinates\fR=\fIeast,north\fR[,\fIeast,north\fR,...]  [\fBoutput\fR=\fIname\fR]   [\fBformat\fR=\fIstring\fR]   [\-\-\fBoverwrite\fR]  [\-\-\fBhelp\fR]  [\-\-\fBverbose\fR]  [\-\-\fBquiet\fR]  [\-\-\fBui\fR]
.SS Flags:
.IP "\fB\-c\fR" 4m
.br
Show sampling coordinates instead of numbering in the legend
.IP "\fB\-g\fR" 4m
.br
Use gnuplot for display
.IP "\fB\-t\fR" 4m
.br
output to text file
.IP "\fB\-\-overwrite\fR" 4m
.br
Allow output files to overwrite existing files
.IP "\fB\-\-help\fR" 4m
.br
Print usage summary
.IP "\fB\-\-verbose\fR" 4m
.br
Verbose module output
.IP "\fB\-\-quiet\fR" 4m
.br
Quiet module output
.IP "\fB\-\-ui\fR" 4m
.br
Force launching GUI dialog
.SS Parameters:
.IP "\fBgroup\fR=\fIname\fR" 4m
.br
Name of input imagery group
.IP "\fBsubgroup\fR=\fIname\fR" 4m
.br
Name of input imagery subgroup
.IP "\fBraster\fR=\fIname[,\fIname\fR,...]\fR" 4m
.br
Name of input raster map(s)
.IP "\fBcoordinates\fR=\fIeast,north[,\fIeast,north\fR,...]\fR \fB[required]\fR" 4m
.br
Coordinates
.IP "\fBoutput\fR=\fIname\fR" 4m
.br
Name for output image (or text file for \-t)
.IP "\fBformat\fR=\fIstring\fR" 4m
.br
Graphics format for output file
.br
Options: \fIpng, eps, svg\fR
.br
Default: \fIpng\fR
.SH DESCRIPTION
\fIi.spectral\fR displays spectral response at user specified
locations in images.
.SH NOTES
This script needs gnuplot to be installed.
.SH EXAMPLE
Analysis of LANDSAT TM7 channels (North Carolina dataset):
.br
.nf
\fC
g.region raster=lsat7_2002_10 \-p
i.spectral \-g input=lsat7_2002_10,lsat7_2002_20,lsat7_2002_30,lsat7_2002_40,lsat7_2002_50,lsat7_2002_70 \(rs
           coordinates=636069,215440,637958,223393,633277,223605
\fR
.fi
.br
Spectral plot of 3 different land cover types: (1) water, (2) green vegetation, and (3) highway
.PP
North Carolina sample dataset:
.br
.nf
\fC
g.region raster=lsat7_2002_10 \-p
LIST=\(gag.list type=raster pattern=\(dqlsat7_2002_[1\-5,7]0\(dq separator=\(dq,\(dq\(ga
i.spectral input=$LIST coordinates=637502.25,221744.25
\fR
.fi
This will search all LANDSAT map for 2002 but select only the B, G, R,
NIR, and MIR channels.
.SH SEE ALSO
\fI
d.where,
r.what
\fR
.SH AUTHOR
Markus Neteler
.br
Francesco Pirotti
.PP
\fILast changed: $Date: 2014\-12\-27 00:33:06 +0100 (Sat, 27 Dec 2014) $\fR
.SH SOURCE CODE
.PP
Available at: i.spectral source code (history)
.PP
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.PP
© 2003\-2019
GRASS Development Team,
GRASS GIS 7.6.0 Reference Manual