When are relative variograms useful in geostatistics? |
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| Authors: | Noel Cressie |
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| Institution: | (1) Department of Statistics, Iowa State University, 50011 Ames, Iowa, USA;(2) Present address: Statistical Research Division, Bureau of the Census, 20233 Washington D.C., USA |
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| Abstract: | The relative variogram has been employed as a tool for correcting a simple kind of nonstationarity, namely that in which local variance is proportional to local mean squared. In the past, this has been linked in a vague way to the lognormal distribution, although if {Zt; t  D}is strongly stationary and normal over a domain D,then clearly {exp (Zt); t D}will stillbe stationary, but lognormal. The appropriate link is made in this article through a universal transformation principle. More general situations are considered, leading to the use of a  scaled variogram. |
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| Keywords: |  method" target="_blank">gif" alt="delta" align="BASELINE" BORDER="0"> method location-width plot lognormal data scaled variogram universal transformation principle |
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