I’ve decided to start adding wikidata tags to objects here in Thailand. I recently wrote a script to help add all the airports with an icao code that also has a wikidata entry, with pretty good success I think. I’m looking for suggestions on what else could be added.
For the airports I used the following query in Overpass Turbo: aeroway = aerodrome and wikidata is null in Thailand, added it to level0 then ran the python script on it.
I corresponded for a while with one of the OSM mappers who is doing railroad mapping in the U.S. He is a railroad enthusiast and might be a useful contact about tags specific to RR mapping, should you have any questions.