[GRASS-SVN] r65083 - grass/trunk/raster/r.thin

[svn_grass at osgeo.org]

Author: marisn
Date: 2015-04-17 01:16:50 -0700 (Fri, 17 Apr 2015)
New Revision: 65083

Modified:
   grass/trunk/raster/r.thin/main.c
   grass/trunk/raster/r.thin/r.thin.html
Log:
Change r.thin documentation to match module behaviour introduced in r44866

Modified: grass/trunk/raster/r.thin/main.c
===================================================================
--- grass/trunk/raster/r.thin/main.c	2015-04-16 15:34:12 UTC (rev 65082)
+++ grass/trunk/raster/r.thin/main.c	2015-04-17 08:16:50 UTC (rev 65083)
@@ -56,7 +56,7 @@
     G_add_keyword(_("raster"));
     G_add_keyword(_("geometry"));
     module->description =
-	_("Thins non-zero cells that denote linear "
+	_("Thins non-null cells that denote linear "
 	  "features in a raster map layer.");
 
     opt1 = G_define_standard_option(G_OPT_R_INPUT);

Modified: grass/trunk/raster/r.thin/r.thin.html
===================================================================
--- grass/trunk/raster/r.thin/r.thin.html	2015-04-16 15:34:12 UTC (rev 65082)
+++ grass/trunk/raster/r.thin/r.thin.html	2015-04-17 08:16:50 UTC (rev 65083)
@@ -1,13 +1,13 @@
 <h2>DESCRIPTION</h2>
 
 <em>r.thin</em> scans the named <em>input</em> raster map layer and 
-thins non-zero cells that denote linear features into linear features 
+thins non-null cells that denote linear features into linear features 
 having a single cell width. Raster lines often need to be thinned 
 (skeletonizing raster features) to a single pixel width before they can 
 be transformed to vector data.
 
 <p>
-<em>r.thin</em> will thin only the non-zero cells of the
+<em>r.thin</em> will thin only the non-null cells of the
 named <em>input</em> raster map layer within the current
 geographic region settings.  The cell width of the thinned
 <em>output</em> raster map layer will be equal to the cell
@@ -19,9 +19,11 @@
 <em>r.thin</em> will create a new <em>output</em> raster
 data file containing the thinned linear features.
 <em>r.thin</em> assumes that linear features are encoded
-with positive values on a background of 0's in the
-<em>input</em> raster data file, hence it creates a 0/1
+with positive values on a background of null's in the
+<em>input</em> raster data file, hence it creates a null/1
 output map.
+Note - behaviour of <em>r.thin</em> was changed in GRASS 7 to
+use null instead of 0 for input and output.
 
 <h2>NOTES</h2>