Metrosafe: Tracking Where GPS Stops

Field notes

Metrosafe describes a three-part arrangement: a smartphone app measures Wi-Fi RTT/FTM against existing access points, a fusion layer fits those measurements to walkable station geometry, and a portal records locations and events. The page gives claimed station precision of 5–10 metres, sub-five-second publication latency, and 15–30-second configurable refresh. It also describes an onboard layer for identifying the train and carriage, plus REST, webhooks, exports, role controls, and audit history.