Hi Markus Many thanks for your response. In the past versions, the patched raster used to have an odd values.
I use Grass 6.4 from Ubuntu 10.10 64 bit repo. Cheers Sab > On Tue, Nov 2, 2010 at 2:03 PM, <[email protected]> wrote: >> Dear all >> >> Is there a limit on the number of rasters for r.patch? > > How funny, we had the same question at the same time... :) > From GRASS 6.4+ there is no more limit despite the limit of open files per > process (which depends on the operating system; for Linux it is > usually 1024 files). > > To increase that: > > The limit of open files per process was reached (64bit Linux: 1024 > files; ulimit -n) > To overcome this limit, the "nofile" parameter needs to be increased in > the > /etc/security/limits.conf > file. Here an increase to 1500 files (use * instead of neteler to aply > it to all users): > > #<domain> <type> <item> <value> > neteler hard nofile 1500 > > > -------------------- > But myself, I got troubles when having registered the maps with > r.external: > > GRASS 6.4.1svn (patUTM32):~ > r.patch in=`g.mlist type=rast > pattern=dtm00* sep=comma mapset=dtm_1m_external` out=dtm_trentino_2m > ERROR 1: > TIFFOpen:/geodata/base_cartography/pat_DTM_LIDAR_2007_UTM_WGS84/geotiffs/dtm000501.tif: > Too many open files > WARNING: Unable to open > '/grassdata/patUTM32/dtm_1m_external/cell_misc/dtm000501/f_format' > WARNING: quantization file [dtm000501] in mapset [dtm_1m_external] missing > WARNING: Unable to open raster map <dtm000...@dtm_1m_external> > ERROR: One or more input raster maps not found > > So far I could not find out the reason. Here I am using 500 files > registered > with r.external. > > Help welcome, > Markus > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
