Recall that the goal of this example is spatial prediction. In particular, you would like to produce a contour map or surface plot on a regular grid of predicted values based on ordinary kriging.

With inverse distance weighting we interpolated to new, unobserved locations by using a weighted average of the values at sampled locations, with the weights inversely proportional to the distance to ...

Spatial prediction, in general, is any prediction method that incorporates spatial dependence. A simple and popular spatial prediction method is ordinary kriging. Ordinary kriging requires a model of ...