Geografic-Information-System/raster/r.li/r.li.padrange/r.li.padrange.html

<h2>DESCRIPTION</h2>
<em>r.li.padrange</em>
 (patch area distribution range) calculates
as:<br>
<img src="rlipadrange_formula.png"> <br>
with:<br>
<ul>
  <li><b>a<small><small>max</small></small></b>: max patch area size<br></li>
  <li><b>a<small><small>min</small></small></b>: min patch area size<br></li>
</ul>

<h2>EXAMPLES</h2>
To calculate range of patch area size, using
my_conf configuration file and saving results in
my_out file run:<br>
<div class="code"><pre>
r.li.padrange input=my_map conf=my_conf output=my_out
</pre></div>


<h2>NOTES</h2>
Do not use absolute path names for output files. They are raster if
moving window disposition was selected, otherwise they are in
~/.r.li/output folder.<br>
If input raster is not full of null values r.li.padrange returns a
value &gt;=0 that is PADcv. <br>
If input raster is full of null values r.li.padrange returns -1. <br>
If you want to have null values instead run <br>

<div class="code"><pre>
r.null setnull=-1 map=my_map
</pre></div>

after index calculation.

<h2>REFERENCES</h2>
McGarigal, K., and B. J. Marks. 1995. FRAGSTATS: spatial pattern
analysis program for quantifying landscape structure. USDA For. Serv.
Gen. Tech. Rep. PNW-351.

<h2>SEE ALSO</h2>
<em>
<a href="r.li.html">r.li</a>
</em>

<h2>AUTHORS</h2>
Serena Pallecchi student of Computer Science University of Pisa (Italy).<br>
Commission from Faunalia Pontedera (PI), Italy (www.faunalia.it)

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