That makes sense to me, and I'm glad to hear that you're wanting to map it accurately to bring into the game! Not only does that give you a real world map to use, but it also means more is mapped in OSM, which is a win for all!

If you do have any questions, feel free to check out the Oceania section of the forums at https://c.osm.org, or the #oceania channel in the OSM World Discord.