Robust estimation of the variogram: I

  • Noel Cressie
  • Douglas M. Hawkins
Article

Abstract

It is a matter of common experience that ore values often do not follow the normal (or lognormal) distributions assumed for them, but, instead, follow some other heavier-tailed distribution. In this paper we discuss the robust estimation of the variogram when the distribution is normal-like in the central region but heavier than normal in the tails. It is shown that the use of a fourth-root transformation with or without the use of M-estimation yields stable robust estimates of the variogram.

Key words

Geostatistics kriging robust estimation variogram 

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Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Noel Cressie
    • 1
  • Douglas M. Hawkins
    • 2
  1. 1.School of Mathematical SciencesThe Flinders University of South AustraliaAustralia
  2. 2.National Research Institute for Mathematical SciencesCSIRPretoriaSouth Africa

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