Not your everyday caveats section: https://man.openbsd.org/airport.7#CAVEATS
There seems to be a conflict here. The author of the linked article interprets the guideline, "New airports can only be added by OpenBSD developers who have visited an airport and thereby have verified its existence," as only requiring that you have been to the airport, not necessarily having flown from: > Once again, the more astute reader will not have missed the fact that the rules do not stipulate any flying requ…
This says nothing about rail stations. For a rail station to be added, you must land on it. Presumably, taking off from there does not count.