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Common scale for independents
We're interested in using Kriging on data whose independent variables
are unrelated. The range of the independent values may vary by
orders of magnitude. For instance, the range of x might be .5->1,
the range of y be 10000->40000 and the range of z be 50->75.
Does gstat presume the independents have a common scale?
Can/should the discrepancy in scales be corrected using anisotropy?