[STATSGRASS] kriging - too long time

[Carlos "Guâno" Grohmann]

Tomas,

nmax has a strong influence on kriging time. In some tests I've done,
interpolation time for and area with 520 rows x 430 cols ranged from
about 20 seconds for nmax=8 up to 20 HOURS for nmax =399.

best

Carlos




On 9/2/07, Tomas Lanczos <lanczos at t-zones.sk> wrote:
> I am performing some kriging following the procedure as it is here:
> http://casoilresource.lawr.ucdavis.edu/drupal/node/438
>
> My problem is that the kriging proces is very slow, it takes approx. 7
> hours. Is the problem a too high resolution, or too much sampling points
> (2234)? How can I optimalize the process?
>
> My region setup is the following:
>
> projection: 1 (UTM)
> zone:       33
> datum:      ** unknown (default: WGS84) **
> ellipsoid:  bessel
> north:      5387295.0553002
> south:      5288130.42061478
> west:       652025.98376024
> east:       786301.92841404
> nsres:      150.02214022
> ewres:      150.02898844
> rows:       661
> cols:       895
> cells:      591595
>
> Many thanks
>
> Tomas
>
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-- 
+-----------------------------------------------------------+
              Carlos Henrique Grohmann - Guano
  Visiting Researcher at Kingston University London - UK
  Geologist M.Sc  - Doctorate Student at IGc-USP - Brazil
Linux User #89721  - carlos dot grohmann at gmail dot com
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