Hello all,

I'm a bit of a rookie with GeoStatistics.  I am interested in Kriging with
External Drift but I am having a hard time finding information that tells
you how it works in laymans terms (without just firing a matrix at you and
leaving you to deduce what it means).

I don't think this is right but I'll give it a shot.  Does it work as
follows :

1) Compute a trend for the drift variable
2) Remove the trend computed in 1) from the main variable
3) Grid the residuals from step 2)
4) Add back the trend from step 1)

I don't think this is right but if you can explain to me how the Drift is
actually applied in laymans terms it would be greatly appreciated.  Also
when you do kriging with external drift do you have to model a variogram or
can a reasonable one be computed automatically, if so how would you compute
it?

Also if you have any good sources of information on Kriging with external
drift could you pass them on to me?

Thanks,

Mike


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