Geografic-Information-System/imagery/i.group/i.group.html

<H2>DESCRIPTION</H2>

<EM>i.group</EM> allows the user to collect raster map layers in an imagery
group by assigning them to user-named subgroups or other groups. This
enables the user to run analyses on any combination of the raster map layers
in a group.  The user creates the groups and subgroups and selects the
raster map layers that are to reside in them. Imagery analysis programs like
<EM><A HREF="i.points.html">i.points</A></EM>, 
<EM><a href="i.rectify.html">i.rectify</A></EM>,
<EM><a href="i.ortho.photo.html">i.ortho.photo</A></EM> and
others ask the user for the name of an imagery group whose data are to be
analyzed. Imagery analysis programs like
<EM><a href="i.cluster.html">i.cluster</A></EM> and 
<EM><a href="i.maxlik.html">i.maxlik</A></EM> ask the user for the imagery group
and imagery subgroup whose data are to be analyzed.


<H2>NOTES</H2>

The <EM>i.group</EM> options are only available for 
imagery map layers in the current LOCATION_NAME.

<P>
Subgroup names may not contain more than 12 characters.


<H2>SEE ALSO</H2>

The GRASS 4 <em>
<A HREF="http://grass.itc.it/gdp/imagery/grass4_image_processing.pdf">Image
Processing manual</A></EM>

<P>
<EM>
<A HREF="i.cluster.html">i.cluster</A><br>
<A HREF="i.maxlik.html">i.maxlik</A><br>
<A HREF="i.points.html">i.points</A><br>
<A HREF="i.rectify.html">i.rectify</A><br>
<a HREF="i.ortho.photo.html">i.ortho.photo</A>
</EM>


<H2>AUTHOR</H2>

Michael Shapiro,
U.S.Army Construction Engineering 
Research Laboratory
<br>
Parser support: Bob Covill (Tekmap, Canada)

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