[GRASS-SVN] r53968 - grass-addons/grass6/raster/r.mess

svn_grass at osgeo.org svn_grass at osgeo.org
Thu Nov 22 02:29:00 PST 2012


Author: pvanbosgeo
Date: 2012-11-22 02:28:59 -0800 (Thu, 22 Nov 2012)
New Revision: 53968

Removed:
   grass-addons/grass6/raster/r.mess/r.mess.html
Log:


Deleted: grass-addons/grass6/raster/r.mess/r.mess.html
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--- grass-addons/grass6/raster/r.mess/r.mess.html	2012-11-22 08:51:34 UTC (rev 53967)
+++ grass-addons/grass6/raster/r.mess/r.mess.html	2012-11-22 10:28:59 UTC (rev 53968)
@@ -1,60 +0,0 @@
-<h2>DESCRIPTION</h2>
-
-<em>r.mess</em> computes the "Multivariate Environmental
-Similarity Surfaces" (MESS) in GRASS using R as backend. The
-MESS index was proposed by Elith et al (2010) and is also
-implemented in the Maxent software. The MESS approach
-can be described as follows (from Elith et al 2010):
-"The multivariate environmental similarity surface (MESS) calculation
-represents how similar a point is to a reference set of points, with
-respect to a set of predictor variables (V1, V2, ...). The values in
-the MESS are influenced by the full distribution of the reference points, so that
-sites within the environmental range of the reference points but in
-relatively unusual environments will have a smaller value than those in
-very common environments."
-
-<p>This module will also compute the individual environmental
-similarity surfaces (IESS), which represents how similar a point is to
-a set of reference points for each of the input variable. MESS
-is then simply calculated as the minimum of its similarity with respect
-to each variable. 
-
-<p>Any sample of interest can be used for the reference set. For example,
-it can be occurrence records for the species; a sample of a region, or a sample of
-current climate conditions in a given area. The input layer representing the
-reference distribution can be a vector point layer or a raster layer.
-
-<p>
-The IESS can have negative values – these are sites where the variable
-has a value that is outside the range in the reference set. A negative MESS
-thus represents sites where at least one variable has a value that is
-outside the range of environments over the reference set, so these are
-novel environments.
-
-<p>
-In addition to the MESS, which is the minimum(IESS), the r.mess
-function also allows to compute mean and medium of the IESS layers.
-
-<h2>NOTES</h2>
-Digits should reflect the level of precision of the input layers. I.e., if
-values of the input layers are recorded with three digits behind the comma,
-Digits should be set to 0.001 or smaller.
-
-<h2>SEE ALSO</h2>
-There is also a similar function implemented for R using the R package
-<em>raster</em>, and which is part of the dismo package in R now. See <a href="http://rossijeanpierre.wordpress.com/2012/08/13/computing-the-multivariate-environmental-similarity-surfaces-mess-index-in-r/">here</a>.
-for more information and the script.
-
-<h2>AUTHOR</h2>
-
-Contact: <a href="http://ecodiv.org/contact.html">Paulo van Breugel</a>
-
-<h2>REFERENCES</h2>
-<ul>
-<li>Elith, J., Kearney, M., & Phillips, S. 2010. The art of
-modelling range-shifting species. Methods in Ecology and Evolution 1:
-330–342.</li>
-</ul>
-
-<p>
-<i>Last changed: $Date$</i>



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