Figure 8.8: Key elements in defining the search for data pairs in the semivariogram analysis of the point P1. The point within one lag is P4, and the points within two lags are P2, P3, and P5. Point P3, however is outside both the tolerance angle and the bandwidth for this search direction angle and is therefore not evaluated as a pair with P1 when evaluating *(h). These same concepts may also be applied in three- dimensions.