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FAQ: Why is it possible to use the cross-covariance and not the cross-semivariogram between primary and secondary data?

Question

Why is it possible to use the cross-covariance and not the cross-semivariogram between primary and secondary data?

Answer

Unlike cross-covariance, the cross-semivariogram can only be used for coincidental data locations. Additionally, the cross-semivariogram is limited because it cannot be used to estimate the shift between variables.