Lots of planets seem to have only one or two locations where the action takes place -
- Naboo: Theed
- Tatooine: Mos Espa / Mos Eisley
- Iego: The city where Jaybo lives
- Bespin: Cloud City
Is this the equivalent of aliens always managing to find either New York or London in Earth sci-fi? i.e. It discounts the vast majority of civilised areas in favour of one or two population centres.
Or is it a result of planets being colonised by small settlements, and the resulting populations being fairly central? e.g. The coastal cities of westerners in early Australia.