[GRASS-user] problem inporting large datasets with v.in.ascii

Jeroen Wortel j.wortel at orange.nl
Tue Sep 26 14:22:36 EDT 2006

Hi Mike,

You are right, importing with th -b switch cuts down considerably on 
memory usage.

eventually I used r.in.xyz which was very suitable for this dense 
dataset. setting the memory switch to 50% imported 18 mln points into 
a raster without any problem.


At 09:47 23-9-2006, Michael Perdue wrote:
>if you're working with with point data then you can use the -b switch
>so that grass doesn't build topology. However, as far as I'm aware,
>v.surf.rst is the only other module that will work without topology
>so you might want to consider breaking your data up into smaller chunks.
>On 22-Sep-06, at 12:52 PM, Jeroen Wortel wrote:
>>Hi all,
>>I tried to import a large xyz ( 7 mln points) dataset with
>>v.in.ascii, but got the following message:
>>registering lines: G_realloc: out of memory
>>At the start of v.in.ascii I had 1.5GB memory free, but during
>>v.in.ascii leaked slowly away ( when checking with top) to 0.
>>Any ideas?
>>I use grass-6.2 cvs, this weeks update
>>grassuser mailing list
>>grassuser at grass.itc.it
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