[GRASS-user] sum of several raster maps

[Glynn Clements]

Hamish wrote:

> > > I have several Raster Maps (1 - 365). I would like to create one map
> > > by adding all these maps together. 
> > > Is there any function to do so without using 
> > > 
> > > r.mapcalc map = map1 + map2 + map3....+map365
> >
> 
> Otto wrote:
> > what about r.series input=map1,map2,map3,.. method=sum ?
> 
> 
> Note prior to GRASS 6.2 there was a limit on the maximum number of open
> files in lib/gis/G.h (256), but that has since been removed. You used to
> have to increase that number to 400 or so and recompile GRASS to use
> that many maps. Also the number of open files must be smaller than the
> operating system's limit. (Given by `cat /proc/sys/fs/file-max` in Linux
> 2.4)  See the comments in raster/r.patch/nfiles.h in the source code.
> (can we increase or remove the limit in r.patch now?)

I've removed the limit from r.patch.

-- 
Glynn Clements <glynn at gclements.plus.com>