Group NTv2 Transformations

The group "NTv2 Transformations" contains functions to perform Reference System Transition with grid files of the NTv2 standard.

Characteristics of the function group

•	Predefined NTv2 Reference Systems

•	Embedding of any NTv2 grid files

•	Support of Polygonal Validity Scopes in NTv2 files

•	Use of ASCII gridfiles (.gsa) and binary gridfiles (.gsb)

•	Automatically allocation of NTv2 files from a common directory

•	Download of many NTv2 files from the KilletSoft website

•	Links to NTv2 providers on the KilletSoft website

•	HARN grid files of the U.S. supported as equivalent NTv2 grid files

•	Free use of some NTv2 files, which otherwise are available for a fee

•	Access to NTv2 files, which are specially licensed for KilletSoft

"NTv2 Transformations" function group

(additional requires the unlocked function group "Coordinate Transformations")

Function getntvbinaryfile() - Determination of NTv2 file names matching a reference system

Function getntvdirmatch() - Determination of a matching NTv2 file in a common directory

Function getntvrefbelong() - Determination of the second NTv2 Reference System

Function getntvrefequiv() - Determination of an NTv2 equivalent Reference System

Function getntvrefstatus() - Determination of the NTv2 membership of a Reference System

Function setntvbinaryfile() - Initializes a NTv2 grid data binary file for Reference System Transitions

Function setntvbinautodir() - Sets a directory for the automatically use of NTv2 binary files

Function setntvbinautofile() - Sets a NTv2 grid binary file for automatically call in a wait position

Function setntvpolyvalid() - Sets Polygonal Validity Check in NTv2 files

Function closentvbinaryfile() - Close NTv2 binary file and free NTv2 instance