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

[Rainer M. Krug]

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

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Rainer M. Krug, Dipl. Phys. (Germany), MSc Conservation
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Leslie Hill Institute for Plant Conservation
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