Developer's description:
SEVENPAR is a tool for the calculation of highly exact seven transformation parameters by the Spatial Helmert Transformation, which make possible precise coordinate transformations from one reference system into another.
New review:
SEVENPAR is a tool for the calculation of highly exact seven transformation parameters by the Spatial Helmert Transformation, which make possible precise coordinate transformations from one reference system into another.
The determined transformation parameters can be entered directly into suitable transformation software, e.g. TRANSDAT Coordinate Transformations, or into the calculation software of GPS receivers to do exact coordinate transformations.
The seven transformation parameters are computed with a set of individual identical points. Those are points with known coordinates in both reference systems (geodetic datum). Cartesian coordinates or geographical coordinates with or without ellipsoidal height using the ellipsoid dimensions are suitable.
Identical measuring points of higher order can be usually inquired or referred by the official institutions for measurement. The necessary ellipsoid half-axis are available in the program for the selection from lists.
The coordinates of the identical points are tested intensively on outliers and deviations by different statistic procedures. The quality of the computed seven parameters of the Spatial Helmert Transformation is documented by a residual matrix and by the computation of the middle, maximum and root mean square (RMS) deviations. more
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