Angle for directional variogram

Slope of variogram

Difference in values between data

points *i *and *j*

Generic constant used for cutoff value

in probability distribution or indicator

transformation

E

Expectation

Kriging error

Indicator function

~

Reduced kriging error

Number of variogram bins

Explanatory variables used in drift

equations

variogram bin

Nugget of variogram

Sample variance on *n *observations

Lag or distance between two data points

Number of data points

Voronoi polygon

Number of locations in a given block

Population variance

Co-kriging random variable at

Range of variogram

location *x*

Sill of variogram

Transformed variable at location *x*

Weight

Regionalized random variable

Potential value of *Z *at location *x*

Predictor or estimate of *Z *at location

Residuals of *Z(x)*

Area of triangle

Arbitrary predictor of *Z *at location *x*

Area designation in block kriging

Sample mean of *n *observations

Population covariance function

$

Regression coefficient used in polyno-

Sample covariance function

mial representation for drift

B-1

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