An Experimental Comparison of Ordinary and Universal Kriging and Inverse Distance Weighting

Journal of the International Association for Mathematical Geology - Tập 31 Số 4 - Trang 375-390 - 1999
Zimmerman, Dale1, Pavlik, Claire2, Ruggles, Amy2, Armstrong, Marc P.3
1Department of Statistics and Actuarial Science, The University of Iowa, Iowa City
2Department of Geography, The University of Iowa, Iowa City
3Department of Geography, and Program in Applied Mathematical and Computational Sciences, The University of Iowa, Iowa City

Tóm tắt

A factorial, computational experiment was conducted to compare the spatial interpolation accuracy of ordinary and universal kriging and two types of inverse squared-distance weighting. The experiment considered, in addition to these four interpolation methods, the effects of four data and sampling characteristics: surface type, sampling pattern, noise level, and strength of small-scale spatial correlation. Interpolation accuracy was measured by the natural logarithm of the mean squared interpolation error. Main effects of all five factors, all two-factor interactions, and several three-factor interactions were highly statistically significant. Among numerous findings, the most striking was that the two kriging methods were substantially superior to the inverse distance weighting methods over all levels of surface type, sampling pattern, noise, and correlation.

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Journal of the International Association for Mathematical Geology

Tập 31 Số 4

375-390

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