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sill - [spatial statistics (use for geostatistics)] A parameter of a variogram or semivariogram model that represents a value that the variogram tends toward when distances become large. Under second-order stationarity, variables become uncorrelated at large distances, so the sill of the semivariogram is equal to the variance of the random variable.
[Category=Geospatial ]
Source: esri, 20 August 2012 09:03:34, http://support.esri.com/en/knowledgebase/GISDictionary/term/abbreviation
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