[qF]

They calculate the positions. Though recently the railway implemented a system in their trains that seems to use GPS to inform passengers on realtime arrival times. So perhaps in the future they will make GPS data available in their API.

The railway company is kinda behind on how the world (of data) works, and they have for a long time considered this kind of information as exclusive information that nobody else should be able to access. Despite being government owned..

[route66]

It's indeed precalculated. Right now the official site of the train service lists blocking construction work on some routes, no train is riding there. On the map though they are still on schedule. Nevertheless a nice piece of work, but not really "live".

[Luc]

> The railway company is kinda behind on how the world (of data) works, and they have for a long time considered this kind of information as exclusive information that nobody else should be able to access. Despite being government owned..

The same thing happened in Belgium. A student made a mobile website for accessing rail times, was ignored by the rail company for 18 months, then got threatened into shutting down when the rail company finally made their own application (which naturally doesn't work as well). Luckily a few government ministers made the rail company see the light, despite their protestations.