[GRASS-user] i.cluster fails and how to create a working attribute data table

Markus Metz markus.metz.giswork at googlemail.com
Wed Jul 22 02:58:46 EDT 2009

Dominik Wiedner wrote:
> Hi Folks,
> Once again, I got some problems with the windows version of GRASS.
> When I want to do an unsupervised classification, the output of i.cluster
> reads:
> "G_calloc: unable to allocate 1000000001 * 8 bytes at alloc_cell.c:128"
This is a request for more than 7GB of memory, unlikely that this is 
needed for a Landsat scene. Do the current region settings match the 
raster to be processed?
> The command I entered reads as follows:
> i.cluster group=Landsat7 at PERMANENT subgroup=LS7_SUB sigfile=LS7_SIG
> classes=20 iterations=30 convergence=98.0 separation=0.0 min_size=17
> reportfile=Rep
> The other problem concerning the creation of vector features is, that i
> can't enter any data, as the error output reads:
> Cannot open database
> 'E:/Damokles_BACKUP/Backup/Wichtig/Geomatik/GIS2/Präsentation/GIS
> DataBase/Deutschland/Ruhrgebiet/dbf/' by driver 'dbf'
A wild guess: it may be the "ä" giving trouble.

Markus M

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