Demographia World Urban Areas survey “An urban area (urbanized area agglomeration or urban centre) is a continuously built up land mass of urban development that is within a labor market (metropolitan area or metropolitan region). An urban area is best thought of as the “urban footprint” --- the lighted area that can be observed from an airplane (or satellite) on a clear night.” That makes the accompanying satellite photos very interesting. (click to see a full size version of the graphic) They were part of a study by Brown University researchers that empirically showed how light seen from outer space could reliably serve as a proxy measure for socioeconomic development.
I've been working with a prominent Korean colleague on a paper that addresses the changing roles of citizens, corporations and government in Korea's "smart cities." Partly for that reason, an article in today's Korea Herald caught my eye. It is entitled "Subway mirrors urban and national growth."
The Korea Herald article does not contain any ranking for mobile digital network services in the different subway systems. However, I'm sure that such a comparison would clearly show that the national capital area subway system around Seoul is the "smartest in the world." (see my earlier post on Seoul's cyber subways here).