[GRASS-SVN] r45398 - grass/trunk/vector/v.kernel

[svn_grass at osgeo.org]

Author: mmetz
Date: 2011-02-14 02:33:25 -0800 (Mon, 14 Feb 2011)
New Revision: 45398

Modified:
   grass/trunk/vector/v.kernel/v.kernel.html
Log:
update manual: explain equal split

Modified: grass/trunk/vector/v.kernel/v.kernel.html
===================================================================
--- grass/trunk/vector/v.kernel/v.kernel.html	2011-02-14 08:31:59 UTC (rev 45397)
+++ grass/trunk/vector/v.kernel/v.kernel.html	2011-02-14 10:33:25 UTC (rev 45398)
@@ -5,8 +5,11 @@
 triangular, epanechnikov, quartic, triweight, gaussian, cosine</em>, 
 default is <em>gaussian</em>.
 <p>
-The module can also generate a vector density map on a vector network, 
-optionally using the equal split algorithm of Okabe et al. 2009.
+The module can also generate a vector density map on a vector network. 
+Conventional kernel functions produce biased estimates by overestimating 
+the densities around network nodes, whereas the equal split kernel 
+function of Okabe et al. (2009) produces unbiased density estimates. 
+The equal split kernel function can be enabled with <em>node=split</em>.
 
 <H2>NOTES</H2>