Re: ordinary kriging

[Konstantin Malakhanov <kosta@iwwnt.iwwl.rwth-aachen.de>]

>>>>> "Michael Leuchner" == Michael Leuchner <leuchner@gsf.de> writes:

    Michael Leuchner> Here is our command file:

    Michael Leuchner> data(var): 'D:\krig_1.txt', x=1, y=2, v=4,
    Michael Leuchner> min=4, radius=0.33, average; variogram(var):
    Michael Leuchner> 41322.5 Pen(72421.4) + 10113.3 Nug(0); mask:
    Michael Leuchner> 'geo_mask.map'; predictions(var): 'krig_83.map';

It seems strange, that you use variogram with range about 70000 and
you search radius is 0.33. What you get then is the pure nugget effect
(a mean of selected points). That would explain strange behaviour. And
it makes no sense to use min=.. without force option, as you will get
a lot of NA. And this is probably not what you want.

Hope it helps.
-- 

Konstantin Malakhanov
---
Institut for Hydraulic Engineering & Groundwater Mgmt., 
RWTH Aachen, Germany
E-Mail: malakhanov@iww.rwth-aachen.de          Tel. +49/(0)241/807343