[GRASS-SVN] r53960 - grass-addons/grass6/raster/r.mess

[svn_grass at osgeo.org]

Author: pvanbosgeo
Date: 2012-11-21 13:20:26 -0800 (Wed, 21 Nov 2012)
New Revision: 53960

Modified:
   grass-addons/grass6/raster/r.mess/r.mess.html
Log:
Extra explanation about input options

Modified: grass-addons/grass6/raster/r.mess/r.mess.html
===================================================================
--- grass-addons/grass6/raster/r.mess/r.mess.html	2012-11-21 21:11:26 UTC (rev 53959)
+++ grass-addons/grass6/raster/r.mess/r.mess.html	2012-11-21 21:20:26 UTC (rev 53960)
@@ -8,18 +8,22 @@
 "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
+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 set of points for each of the input variable. MESS
+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.
+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