[GRASS-SVN] r72768 - grass/trunk/raster/r.buildvrt

[svn_grass at osgeo.org]

Author: mmetz
Date: 2018-06-04 13:01:24 -0700 (Mon, 04 Jun 2018)
New Revision: 72768

Modified:
   grass/trunk/raster/r.buildvrt/r.buildvrt.html
Log:
r.buildvrt: update manual

Modified: grass/trunk/raster/r.buildvrt/r.buildvrt.html
===================================================================
--- grass/trunk/raster/r.buildvrt/r.buildvrt.html	2018-06-04 19:58:36 UTC (rev 72767)
+++ grass/trunk/raster/r.buildvrt/r.buildvrt.html	2018-06-04 20:01:24 UTC (rev 72768)
@@ -10,7 +10,7 @@
 <em>r.buildvrt</em> creates a list of raster maps that can be 
 located in different mapsets. The ouput is a read-only link to 
 the original raster maps which is only valid if the original raster 
-maps remain at the originally indicated mapset. A VRT can also be built 
+maps remain in the originally indicated mapset. A VRT can also be built 
 from raster maps registered with <em>r.external</em>.
 
 <p>
@@ -18,6 +18,12 @@
 raster map. Only reading small parts of the VRT provides a performance 
 benefit.
 
+<p>
+A GRASS virtual raster can be regarded as a simplified version of GDAL's 
+<a href="http://gdal.org/gdal_vrttut.html">virtual raster format</a>. 
+The GRASS equivalent is simpler because issues like nodata, projection, 
+resolution, resampling, masking are already handled by native GRASS 
+raster routines.
 
 <h2>EXAMPLES</h2>
 
@@ -45,6 +51,12 @@
 <a href="r.patch.html">r.patch</a>
 </em>
 
+<p>
+The equivalen GDAL utility 
+<em>
+<a href="http://gdal.org/gdalbuildvrt.html">gdalbuildvrt</a>
+</em>
+
 <h2>AUTHOR</h2>
 
 Markus Metz