[GRASS-user] Raster stack with more than 3 rasters

[Nikos Alexandris]

On Sun, Apr 4, 2010 at 4:39 PM, joel dinis <dinis.joel at gmail.com> wrote:
> > Hello to all,

> > I'm currently working
> > multi-temporal LISS imagery
> > and I intent to make a raster stack
> > with 10 raster files to test a method.
> > With GRASS, I know that is possible to make a
> > stack with 3 rasters, but it's possible
> > to do it with more than 3?

On Sun, 2010-04-04 at 17:38 +0200, Markus Neteler wrote:
> Joel,

> you can use r.series for that:
> http://grass.osgeo.org/grass64/manuals/html64_user/r.series.html
> 
> or also r.mapcalc:
> http://grass.osgeo.org/grass64/manuals/html64_user/r.mapcalc.html
> 
> The limit is the limit of the operating system.
> 
> For example, both the hard and soft limits are typically 1024.
> The soft limit can be changed with e.g. "ulimit -n 1500" but
> not higher than the hard limit. If it is too low, you can as
> superuser add an entry in
> 
> /etc/security/limits.conf
> % #<domain>      <type>  <item>         <value>
> % neteler               hard    nofile          1500
> 
> This would raise the hard limit to 1500 file. Be warned that
> more files open need more RAM.
> I used this to open the 1460 daily MODIS LST maps of one
> year in one step in r.series.

That is GREAT!

Thank you,
Nikos