[GRASS-SVN] r62760 - grass/trunk/raster/r.in.xyz

[svn_grass at osgeo.org]

Author: neteler
Date: 2014-11-17 00:00:43 -0800 (Mon, 17 Nov 2014)
New Revision: 62760

Modified:
   grass/trunk/raster/r.in.xyz/r.in.xyz.html
Log:
r.in.xyz manual: explain import of x,y,string data trick

Modified: grass/trunk/raster/r.in.xyz/r.in.xyz.html
===================================================================
--- grass/trunk/raster/r.in.xyz/r.in.xyz.html	2014-11-16 16:24:26 UTC (rev 62759)
+++ grass/trunk/raster/r.in.xyz/r.in.xyz.html	2014-11-17 08:00:43 UTC (rev 62760)
@@ -174,6 +174,7 @@
 the input points with <em>m.proj</em> or <em>cs2cs</em> before running
 <em>r.in.xyz</em>.
 
+
 <h3>Interpolation into a DEM</h3>
 
 The vector engine's topographic abilities introduce a finite memory overhead
@@ -193,7 +194,14 @@
 v.surf.rst in=lidar_min_pt elev=lidar_min.rst
 </pre></div>
 
+<h3>Import of x,y,string data</h3>
 
+<em>r.in.xyz</em> is expecting numeric values as z column. In order to 
+perform a occurence count operation even on x,y data with non-numeric 
+attribute(s), the data can be imported using either the x or y 
+coordinate as a fake z column for <b>method</b>=<tt>n</tt> (count 
+number of points per grid cell), the z values are ignored anyway.
+
 <h2>EXAMPLE</h2>
 
 Import the <a href="http://www.grassbook.org/ncexternal/index.html">Jockey's