Funny you should mention Albania: It's exactly where I learned never to doubt Google Maps. Specifically, never to assume that "It's like ten meters between the

Funny you should mention Albania: It's exactly where I learned never to doubt Google Maps. Specifically, never to assume that "It's like ten meters between these two points... I don't see a reason why we would need to go all the way around". (There was a 30m deep gorge) More to the point: Given enough position data, Google should be able to assess all those road parameters you mention, far better than manual entry could ever do at scale. They could easily notice, as but one example, when locals routinely take different routes than they would suggest and modify their data accordingly.