Semi-Variogram Estimation and Universal Kriging Program (Computer Program Documentation User's Manual)

摘要

Computer program K603 contains procedures needed in the stochastic-interpolation algorithm known as universal kriging, as originally described by G. Matheron. By specifying a theoretical semi-variogram and functional terms of an assumed underlying trend, or drift, kriging provides unbiased estimates of variables in neighborhoods of autocorrelation. Given single observations and their spatial distribution in two dimensions, the technique yields point estimates and point-estimate variances at arbitrary locations. In the absence of measurement errors, which can be incorporated in the analysis, kriging is an exact interpolator. The program includes four options used in kriging: (1) semi-variogram estimation; (2) universal kriging for optimization of the drift-semi-variogram set; (3) universal kriging for arbitrary-point or block estimation; and (4) universal kriging for drift-coefficient estimation.