[GRASS-user] Raster stack with more than 3 rasters
Nikos Alexandris
nikos.alexandris at felis.uni-freiburg.de
Mon Apr 5 16:23:07 EDT 2010
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
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