Abstract
The advantages of using orthogonal rather than nonorthogonal polynomials for trend-surface analysis are discussed briefly. A method for calculating orthogonal polynomial trend surfaces of any degree on the basis of irregularly spaced data is described. The method is illustrated with subsurface data for the elevation on top of the Devonian Dundee Limestone, Michigan.
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Whitten, E.H.T. Orthogonal polynomial trend surfaces for irregularly spaced data. Mathematical Geology 2, 141–152 (1970). https://doi.org/10.1007/BF02315155
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DOI: https://doi.org/10.1007/BF02315155