Abstract
On base of conditions of unbiased and minimal rms estimation of interpolated random quantities in random field by geostatics, this scientific article considered scientific bases of the kriging, collocation methods and showed that theory of the collocation method not had been constructed on base of conditions of unbiased estimation. With purpose of obtainment of the unbiased estimation of probabilistic deviation by collocation method, approximate values of the most probabilistic interpolated random quatities can be determined from random quantities in random field. On base of research results, article showed unsuitability of use of gravity anomalies calculated from EGM2008 for approximate values of interpolated gravity anomalies based on ground gravimetric data in Vietnam because this data had been used for calculation of harmonic coefficients of the EGM2008.
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