[GRASS5] [bug #4164] (grass) v.clean: uses 1GB RAM, 1 GB swap for a vector with only 628 boundaries

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this bug's URL: http://intevation.de/rt/webrt?serial_num=4164
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Subject: v.clean: uses 1GB RAM, 1 GB swap for a vector with only 628 boundaries

Platform: GNU/Linux/x86
grass obtained from: CVS
grass binary for platform: Compiled from Sources
GRASS Version: 2006-02-20

v.buffer used all my memory (1 GB RAM and 1GB swap) when building a clean buffer for my vector file, and I had to kill it to continue my work.

For a test, I forced v.buffer to skip cleaning, using option debug=buffer, and  tried to clean this "dirty" output myself:

v.clean input=rogow_parcels_06_water_buff100 output=rogow_parcels_06_water_buff100_cl type=boundary tool=break

Again, it ate all my memory. The rogow_parcels_06_water_buff100 is very small:

Number of boundaries:   628

v.clean reaches the memory limit at about:

Intersections: 78194 (line 150883)

There must be some problem with memory handling in the vector code.

I'm putting the location with (only) my problematic vector file, if somebody is interested in fixing the problem.

http://www.biol.uni.wroc.pl/sieczka/udostepnione/grass/huha.tar.bz2 (364 KB)

I'm not looking for a workaround - I accomplished my task using r.buffer, r.to.vect.

Maciek


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