Geografic-Information-System/scripts/i.spectral/i.spectral.html

<h2>DESCRIPTION</h2>

<em>i.spectral</em> displays spectral response at user specified 
locations in images.

<h2>NOTES</h2>

This script needs gnuplot to be installed.


<H2>EXAMPLE</H2>

To analyze a time series of maps, run:

<div class="code"><pre>
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
</pre></div>

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.

<h2>SEE ALSO</h2>

<em><a HREF="d.what.rast.html">d.what.rast</a></em><br>
<em><a HREF="d.where.html">d.where</a></em><br>
<em><a HREF="r.what.html">r.what</a></em><br>

<h2>AUTHOR</h2>

Markus Neteler<br>
Francesco Pirotti

<p><i>Last changed: $Date$</i>