This is a remarkable feat. Amazing. I’d like to add an interesting metric: density of subway/metro stations as measured by number of stations per square kilometer. In European cities, City, Metro System, Stations, City Area (km²), Density (stations/km²): 1. Paris, Metro de Paris, 244, 105, 2.32 2. Berlin, U‑Bahn only, 173, 892, ~0.19 3. London Underground (London Tube), ~270, 1,572, ~0.17 4. Madrid, Metro de Madrid,…
Is Paris 6 times smaller than Madrid and 15 times smaller than London? Seems suspicious to me. What exactly is the boundary of this "area" and how does it relate to the subway network?
+ Madrid: https://www.openstreetmap.org/relation/5326784
+ Paris: https://www.openstreetmap.org/relation/7444
London is a whole different animal. While Madrid and Paris are arguably "similar" cities in terms of urban design and residential density, London and UK cities in general are completely different.