Published: Jan 1996
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Geostatistics offers a variety of spatial estimation procedures which are known as kriging. These techniques are commonly used for interpolation of point values at unsampled locations and estimation of average block values. Kriging techniques provide a measure of accuracy in the form of an estimation variance. These estimates are dependent on the model of spatial variability and the relative geometry of measured and estimated locations. Ordinary kriging is a linear minimum-variance interpolator that assumes a constant, but unknown global mean. Other forms of linear kriging includes simple and universal kriging, as well as co-kriging. If measured data display non-Gaussian tendencies, more accurate interpolation may be obtained through non-linear kriging techniques, such as lognormal and indicator kriging.
Geostatistics, kriging, spatial variability, mapping, environmental investigations
Associate Professor, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA