3 ms·

Citymapper has been able to tell you what stop you're at for many years (at least on the NYC subway). How does their solution work?

• f1shy 2y ago
  No idea, but think about fingerprinting through available Wi-Fi ssid and/or BT devices?
• agos 2y ago
  not in Milan though, even though we have full cellular coverage underground. I wonder why the difference