[GRASS-user] Re: Question concerning r.to.vect and out of memory error

[Rainer M. Krug]

One additional information: huge means:
Rows:         25960
Columns:      23211
     Total Cells:  602557560

Rainer

Rainer M. Krug wrote:
> Hi
> 
> my system: SuSE 10.2, Dual core processor, 1GP physical memory, 16GB 
> swap (one swap partition of 1GB and one swap file of 15GB)
> 
> I have a huge DEM from which I calculated the slopes and categorised 
> them in 10% classes. Now I want to use r.to.vect to convert them into a 
> vector layer of type area. My problem is that I get an out of memory 
> error, even though there is enough memory available. It seems that GRASS 
> 6.2.1 only uses the swap partition and not the swap file (which would be 
> really strange).
> 
> by using "free -m" , I got the following memory information (in 
> megabytes) when r.to.vect quit with an out of memory error:
> 
>              total       used       free     shared    buffers     cached
> Mem:          1011        998         12          0          1        103
> -/+ buffers/cache:        894        117
> Swap:        17299       1043      16255
> 
> Any ideas on how I can avoid this?
> 
> 
> By the way: before I started grass, I created the swapfile with
> 
> dd ...
> mkswap ...
> swapon ...
> 
> Any help welcome,
> 
> Rainer
> 


-- 
NEW EMAIL ADDRESS AND ADDRESS:

Rainer.Krug at uct.ac.za

RKrug at sun.ac.za WILL BE DISCONTINUED END OF MARCH

Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
Biology (UCT)

Leslie Hill Institute for Plant Conservation
University of Cape Town
Rondebosch 7701
South Africa

Fax:		+27 - (0)86 516 2782
Fax:		+27 - (0)21 650 2440 (w)
Cell:		+27 - (0)83 9479 042

Skype:		RMkrug

email:	Rainer.Krug at uct.ac.za
       	Rainer at krugs.de