[R-sig-Geo] Zonal Anisotropy versus Geometric Anisotropy

[Olatunde Mosobalaje]

To what extent would the vertical variogram sill be less than the data
variance before a zonal anisotropy can be considered?

I have this data with horizontal variogram sill (along all azimuths) of
0.0042 but a vertical variogram sill of 0.004. The variance of the data is
around 0.0044. I have taken the horizontal sill to be approximating the
variance. I wonder if I should do the same for the vertical sill and
therefore declare a fully geometric anisotropy; or, if I should take the
vertical sill as indeed less than the sill and therefore declare a zonal
anisotropy.

Thank you in advance for your response.

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