9/23/2023 0 Comments Ez kriging softwareIn this article, restricted maximum likelihood is used to obtain estimates of the parameters of the residual process, and an approximate F test that incorporates the spatial correlation in testing the significance of the trend or explanatory relationship is given. However, with regard to estimation of the parameters of the underlying semivariogram model, both universal kriging and kriging with external drift are special cases of a statistical regression model with spatially correlated errors. Both of these techniques require knowledge of the semivariogram of the residual process, and they have often been criticized for difficulties in obtaining this semivariogram. Such an approach is often called "kriging with external drift" in the geostatistical literature. This article shows how the universal kriging approach may be used to incorporate explanatory variables in the mapping of a spatial process. Universal kriging is one method used for the prediction of nonstationary spatial functions.
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