[STATSGRASS] Re: [GRASSLIST:10737] krigging result looks weird

[Roger Bivand]

On Tue, 7 Mar 2006, Edzer J. Pebesma wrote:

> At the risk of being too obvious/ignorant, is the issue that kriging 
> reproduces
> observed values where grid cell centres exactly coincide with data points?
> A solution to that may be to shift the grid (or data) over a very small 
> distance.

No, I asked Carlos to move this here because I suspected that there might 
be a direct explanation. Carlos, could you try jittering the input data 
points, would just moving them within a target 30m cell be enough, say 
within +/-15m? x+runif(*, -15, +15), y the same, and hope that both 
runif()s don't say 0?

Thanks!

Roger

> --
> Edzer
> 

-- 
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: Roger.Bivand at nhh.no