Geografic-Information-System/scripts/r.reclass.area/r.reclass.area.html

<h2>DESCRIPTION</h2>

<em>r.reclass.area</em> reclasses a raster map greater or
less than a user specified area size (in hectares).
<p>
If the <em>-c</em> flag is used, <em>r.reclass.area</em> will skip the creation
of a clumped raster and assume that the input raster is already clumped.

<h2>EXAMPLES</h2>

In this example, the ZIP code map in the North Carolina sample dataset location
is filtered for large areas (removing smaller areas from the map):

<div class="code"><pre>
g.region raster=zipcodes -p
r.report zipcodes unit=h

# extract only areas greater than 2000 ha, NULL otherwise:
r.reclass.area input=zipcodes output=zipcodes_larger2000ha \
               mode=greater value=2000

r.report zipcodes_larger2000ha unit=h
</pre></div>

In this example, the ZIP code map in the North Carolina sample dataset location
is filtered for smaller areas which are substituted with the value of the respective
adjacent area with largest shared boundary:

<div class="code"><pre>
# reclass by substitutional removing of areas minor of 1000 ha
r.reclass.area input=zipcodes output=zipcodes_minor1000ha \
               mode=lesser value=1000 method=rmarea
</pre></div>

<h2>SEE ALSO</h2>

<em>
<a href="r.reclass.html">r.reclass</a>,
<a href="r.clump.html">r.clump</a>,
<a href="r.stats.html">r.stats</a>
</em>

<h2>AUTHORS</h2>

NRCS,<br>
Markus Neteler

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