[rwmj]

You don't need a map of the whole world/country in order to operate a regional taxi service. Nor do you need intelligence for parking (except in the taxi garage - which can be done by humans if necessary). You just need a smaller map of the region that the taxi will operate in, and the ability to "phone home" when it sees new objects in the map (which can be analyzed by humans / really big computers and added to the map in real time).