Geodetic Datum Transformation by Multiple Regression Equations.
DEFENSE MAPPING AGENCY AEROSPACE CENTER ST LOUIS AFS MO
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A computer program incorporating the least squares stepwise multiple regression procedure has been used to derive polynomial equations for converting coordinates from one geodetic datum to another datum shifts as a function of latitude and longitude. Reference coordinate differences throughout the geographic area or datum are used for the regression. Therefore, the regression exhibits sensitivity to regional variations in the coordinate differences. These variations are closely related to changes in the geodetic control in localized areas. The resulting equations reflect this in precision. Contrariwise, the traditionally used Molodensky Coordinate Transformation Formulas, as conventionally applied over a geographic area, utilize area average rectangular coordinate differences delta X, delta Y, delta Z. Author
- Statistics and Probability