GNTRANS
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GNTRANS Open
Coordinate Operation Method Details [VALID]
Name: GNTRANS
Code: 1040
Operation is Reversible: Yes
Formula: GNTRANS is a multistage three-dimensional transformation approach. Starting with a conventional seven-parameter transformation, the next stage functionally models the residuals at identical points using a unique, continuous spline surface. The final stage is a stochastic prediction to describe remaining discrepancies. For application and to improve performance, topocentric coordinate offsets are interpolated from a regular grid derived from the above transformation to determine coordinates of an arbitrary input point in the target system and vice-versa.
Method
Parameters:
Parameter Name Parameter Code Sign reversal Parameter Description
Cartesian coordinate programme file 1024 No The name of the programme file containing Cartesian coordinates in both source and target CRSs.
GNTRANS transformation identifier 1025 No Identifier for the subset of parameters stored inside the transformation programme.