Changes in dispersion variance consequent upon inaccurately modelled semi-variograms

Peter I. Brooker

Mathematics and Computers in Simulation (MATCOM), 1988, vol. 30, issue 1, 11-16

Abstract: The semi-variogram function which describes the spatial variation of samples as a function of their distance apart is an intermediary in geostatistical calculations. It is used in the calculation of several variances: the estimation variance which quantifies the accuracy of block estimates and the dispersion variance which measures the variability of blocks in the deposit. However the semi-variogram must be accurately modelled if these variances are to be well-known. The changes in dispersion variance calculated here when a spherical semi-variogram is estimated inaccurately show the need for care in its estimation, especially in the selection of the correct nugget effect.

Date: 1988
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Persistent link: https://EconPapers.repec.org/RePEc:eee:matcom:v:30:y:1988:i:1:p:11-16

DOI: 10.1016/0378-4754(88)90098-5

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