Does anybody know how Google's Indoor Navigation works? Is it WiFi based? And if so, are they relying on their existing Wifi DB mapped by the Street View vehicle? Thanks Wanger
The Google IO 2013 brought the answer:
Source: https://www.youtube.com/watch?v=oLOUXNEcAJk
"We actually combine a lot of different sensors to give you that one estimate; we use the WiFi, we use GPS. We use the sensors (that's the accelerometer, gyroscope on your phone, the barometer as well)... the one that dominates ... is the WiFi".
Many thanks to Waleed & Sarah for the presentation.