[GRASS-SVN] r34259 - grass/branches/develbranch_6/vector/v.patch

[svn_grass at osgeo.org]

Author: mlennert
Date: 2008-11-12 10:44:19 -0500 (Wed, 12 Nov 2008)
New Revision: 34259

Modified:
   grass/branches/develbranch_6/vector/v.patch/description.html
Log:
added note about danger of losing attributes with -a flag (merge from trunk)


Modified: grass/branches/develbranch_6/vector/v.patch/description.html
===================================================================
--- grass/branches/develbranch_6/vector/v.patch/description.html	2008-11-12 15:42:02 UTC (rev 34258)
+++ grass/branches/develbranch_6/vector/v.patch/description.html	2008-11-12 15:44:19 UTC (rev 34259)
@@ -14,7 +14,9 @@
 editing can be done automatically using
 <em><a HREF="v.clean.html">v.clean</a></em> (tool=snap,break,rmdupl).
 
+When using the <em>-a</em< flag, the user has to make sure that the features in the different maps added to the output map do not have overlapping category numbers, unless identical category numbers reflect identical attributes, otherwise the attributes of the added maps are lost. To avoid this, the user can use <em>v.category option=sum</em> to change category values of some of the maps before patching.
 
+
 <h2>EXAMPLES</h2>
 
 Patch together two maps with mixed feature types: