[GRASS-SVN] r67798 - grass-addons/grass7/raster/r.bioclim

[svn_grass at osgeo.org]

Author: neteler
Date: 2016-02-10 01:24:31 -0800 (Wed, 10 Feb 2016)
New Revision: 67798

Modified:
   grass-addons/grass7/raster/r.bioclim/r.bioclim.html
Log:
r.bioclim manual: explain better the outscale trick (upon suggestion by Paulo van Breugel

Modified: grass-addons/grass7/raster/r.bioclim/r.bioclim.html
===================================================================
--- grass-addons/grass7/raster/r.bioclim/r.bioclim.html	2016-02-10 09:21:49 UTC (rev 67797)
+++ grass-addons/grass7/raster/r.bioclim/r.bioclim.html	2016-02-10 09:24:31 UTC (rev 67798)
@@ -13,7 +13,10 @@
 If the input temperatures are scaled, e.g. as input = Celsius * 10, then 
 the <b>inscale</b> option must be set to 10. Similarly, the <b>outscale</b> 
 option is by default 10, and temperature output is in this case Celsius * 10. 
-Exceptions are BIO3, BIO4, and BIO15 which are always multiplied with 100 (see below).
+Exceptions are BIO3, BIO4, and BIO15 which are always multiplied with 100
+(see below). The reason that <b>outscale</b> is set to 10 by default is that
+the output layers are integers (for compatibility with WORLDCLIM), and a
+scaling factor of 10 (or higher power of 10) ensures a minimum of precision.
 
 <h2>NOTES</h2>
 <h4>Quarter years</h4>