[GRASS-user] Large vector file processing

[Margherita Di Leo]

Hi again,

On Fri, Apr 24, 2015 at 11:03 AM, Margherita Di Leo <diregola at gmail.com>
wrote:

> Moritz,
>
> On Fri, Apr 24, 2015 at 10:09 AM, Moritz Lennert <
> mlennert at club.worldonline.be> wrote:
>
>> On 24/04/15 09:54, Margherita Di Leo wrote:
>>
>>>
>>>
>>> :~ > r.to.vect input=raster_tty output=vector_tty type=area
>>> Extracting areas...
>>>   100%
>>> Writing areas...
>>>   100%
>>> Building topology for vector map <vector_tty at assessment>...
>>> Registering primitives...
>>> Killed0000
>>>
>>> what does this mean?
>>>
>>> :~ > v.build vector_tty
>>> WARNING: Coor file of vector map <vector_tty at assessment> is larger than
>>> it
>>>           should be (2403996039 bytes excess)
>>> Building topology for vector map <vector_tty at assessment>...
>>> Registering primitives...
>>> Killed0000
>>>
>>> Question about "larger that it should be": What is this limitation? I
>>> guess is related to the specs of my laptop?
>>>
>>
>> This just means that topology has not been built correctly, which is
>> probably due to some memory issues.
>>
>> See also https://trac.osgeo.org/grass/ticket/2045.
>>
>> One option mentioned in this report is to set GRASS_VECTOR_LOWMEM before
>> running r.to.vect in order to limit memory usage.
>
>
> Thank you for the suggestion, digging deeper I've found also
> http://lists.osgeo.org/pipermail/grass-user/2011-January/059175.html
> Now trying this option.
>

Unfortunately, this did not work! It took longer, but eventually the
r.to.vect yielded again the Killed0000 signal in the "building topology"
phase..


-- 
Best regards,

Dr. Margherita DI LEO
Scientific / technical project officer

European Commission - DG JRC
Institute for Environment and Sustainability (IES)
Via Fermi, 2749
I-21027 Ispra (VA) - Italy - TP 261

Tel. +39 0332 78 3600
margherita.di-leo at jrc.ec.europa.eu

Disclaimer: The views expressed are purely those of the writer and may not
in any circumstance be regarded as stating an official position of the
European Commission.
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