Question

How are standard coordinate system definitions stored in FME?

Answer

Coordinate Systems in FME are defined by a set of parameters, including datum, units etc which are in turn similarly defined.

Coordinate Systems are stored - in a binary format - in the file <fme install dir>/Reproject/Coordsys
Datums are stored - in a binary format - in the file <fme install dir>/Reproject/Datums
Ellipsoids are stored - in a binary format - in the file <fme install dir>/Reproject/Elipsoid

These definitions are not editable by users, nor can custom definitions be added to these FME definition files.However, you can add your own custom coordinate systems and save them in a shared resource file. See the FME Coordinate System help on how to create a custom coordinate system.

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