[GRASSLIST:6808] Re: interpolation takes long time

[Māris Nartišs]

You mean v.surf.rst?
Process speed is controled by segmax and npmin parameters. You should
read http://www.ing.unitn.it/~grass/conferences/GRASS2002/proceedings/proceedings/pdfs/Cebecauer_Tomas.pdf

I had 100'000 data points for 3'000'000 raster cells. On a 2,5 GHz P4
with 512 RAM and segmax=100 npmin=400 it took only 12 min to finish
task. Damn fast. On my home 850 Mhz Celeron with only 192 RAM it took
about 45 mins.

So - how big is your data set and how You know that v.surf.rst has
become dead? It segfaults? May bee it is still running just very
slooow :)


Just my 2c.
Maris.

On 5/18/05, orkun <temiz at deprem.gov.tr> wrote:
> hello
> 
> I need to use v.surf.rast. But my contour map covers
> very large area. So it takes very long time to perform
> interpolation. In previous trials, v.surf.rast became dead.
> 
> What can I do to quicken this process ?
> 
> regards
> 
> Ahmet Temiz
> 
> ______________________________________
> XamimeLT - installed on mailserver for domain @deprem.gov.tr
> Queries to: postmaster at deprem.gov.tr
> ______________________________________
> The views and opinions expressed in this e-mail message are the sender's own
> and do not necessarily represent the views and the opinions of Earthquake Research Dept.
> of General Directorate of Disaster Affairs.
> 
> Bu e-postadaki fikir ve gorusler gonderenin sahsina ait olup, yasal olarak T.C.
> B.I.B. Afet Isleri Gn.Mud. Deprem Arastirma Dairesi'ni baglayici nitelikte degildir.
> 
>