| Helmert transformation is a 4 parameter transformation (2 translations, 1 rotation, 1 scale) between two plain coordinate systems. This transformation is overdetermined in case of more than 2 control points in each system. A solution that satisfies all transformation inputs may not exist. HELMERTT returns the solution with the minimum residuals of control points. |
Calculates points on an ellipsoid, for approximating the shape of the earth.