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Geodetic Development Kit

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Fred Killet

May 4, 2021, 4:23:07 AM5/4/21
Dear software developers,

here I post a hint for people who develop programs with geodetic functionality like coordinate transformations, datum shifts or distance calculations. For this you can easily include ready for use geodetic functions from my Geodetic Development Kit GeoDLL. The Dynamic Link Library can be used with almost all modern programming languages like C, C++, C#, Basic, Delphi, Pascal, Java, Fortran, xSharp, MS-Office and so on. Examples and interfaces are available for many programming languages.

GeoDLL is a professional Geodetic Development Kit or Geodetic Function Library for worldwide 2D and 3D coordinate transformations and datum shifts with highest accuracy. Also: Helmert and Molodensky parameters, NTv2, HARN, INSPIRE, EPSG, elevation model (DEM), distance and time zone calculation, meridian convergence and much more. GeoDLL is available as 32bit and 64bit DLL and as C / C++ source code.

The DLL is very fast, secure and compact thanks to the consistent development in C / C++ with Microsoft Visual Studio. The geodetic functions are available in 32bit and 64bit architecture. All functions are prepared for multithreading and server operating.

You find a free downloadable test version on
Notes about the NTv2 support can be found here:
Report on the quality of the coordinate transformations:

Best regards and stay healthy!


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