Although note the map is only city addresses. For example the "London" pin is on the notional point where "London" is, ie Charing Cross. There is no giant netwo

Although note the map is only city addresses. For example the "London" pin is on the notional point where "London" is, ie Charing Cross. There is no giant network interchange at Charing Cross, it's just a convenient place co-ordinate for "London".