semivariogram

semivariogram

[‚sem·i′ver·ē·ə‚gram]
(statistics)
A mathematical function used to quantify the dissimilarity between groups of values.
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References in periodicals archive ?
For the spatial distribution analysis of the production, the geostatistics was used, from the semivariogram modeling and the creation of kriging maps.
The spatial dependence structure was evaluated by geostatistics, calculating the experimental semivariogram (Equation 1):
A semivariogram model (Webster and Oliver 2001) was used to quantify spatial variations in SOCD at all locations sampled using geostatistical methods.
Semivariogram analysis showed that soil pH and EC were moderate spatially dependent.
This was calculated for the stations with available weather data, and subsequently the spatial interpolation was made using the ordinary kriging method (Mello, Lima, Silva, Mello, & Oliveira, 2003) and a spherical semivariogram model as the function to estimate the values for the entire state.
We considered the semivariogram range as the distance at which locations become spatially independent.
Split samples suggested that model 4 predicted well, and residual semivariogram plots did not exhibit spatial autocorrelation.
The geostatistical semivariogram is used to quantify the differences between sampled data values in the terms of separation distance h.
The ordinary Kriging method using the exponential semivariogram function was applied to create continuous HSI maps.