Geografic-Information-System/scripts/r.colors.stddev/r.colors.stddev.html

<h2>DESCRIPTION</h2>

<em>r.colors.stddev</em> set raster map color rules based on standard
deviations from a map's mean value, either as a continuous color gradient
or in color bands per standard deviation (S.D.) from the mean.

<p>
With the color band option values less that 1 S.D. from the mean are
colored green, within 1-2 S.D. are colored yellow, within 2-3 S.D. are
colored red, and beyond 3 S.D. are colored black.
<p>
For a differences map there is an option to lock the center of the color
table at zero. Values more than two S.D. below the mean will be colored blue;
values below the mean but less than 2 S.D. away will transition to white,
and above the mean the colors will simularly transition to full red at +2 S.D.

<h2>EXAMPLE</h2>

North Carolina sample dataset location:

<div class="code"><pre>
g.region rast=elevation -p
r.colors.stddev elevation
</pre></div>


<h2>SEE ALSO</h2>

<em>
<a href="r.colors.html">r.colors</a>,
<a href="r.univar.html">r.univar</a>,
<a href="v.colors.html">v.colors</a>
</em>


<h2>AUTHOR</h2>

Hamish Bowman, <i>Dunedin, New Zealand</i>

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