• Which the release of FS2020 we see an explosition of activity on the forun and of course we are very happy to see this. But having all questions about FS2020 in one forum becomes a bit messy. So therefore we would like to ask you all to use the following guidelines when posting your questions:

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Apt.dat usage and license


Resource contributor

I’m curious if anyone has any info on usage restrictions of the data in apt.dat regarding distribution of derivatives? In the most recent specification of apt.dat it is mentioned that the data is GPL and usage even for commercial applications is welcome. However, afaik apt.dat is only available currently with an X-Plane install and thus basically the X-Plane license applies. Bit confused here.


Edit: referring to the global apt.dat here, that ships with xplane
The apt.dat may be shipped with X-Plane, but if the data itself is licensed under the GPL, said license applies.

As far as I know, the GPL-licensed FlightGear also makes use of X-Plane's apt.dat data for its global airports and Laminar Research is fully aware of that.