The recorded path is the phone's own tracking, fitted onto this plan on the surveyed radios the walker stopped at. It is a fit with a measured residual, not ground truth, and the residual is printed with every walk.
This walk
What it measured, and against what.
| Recorded | 2026-08-28, 25 minutes, 302 m walked |
|---|---|
| Path fitted onto the plan | on 9 surveyed radios the walker stopped at, off by 0.26 m on them (RMS) |
| Radios that heard the phone | 9, over 155,034 Bluetooth readings |
| Positions computed | 758, one every 2.0 seconds |
| Typical miss | 2.48 m — 9 in 10 within 7.96 m |
| Without a propagation model | 4.47 m — a signal-weighted average of the radios that heard it |
| How this room carries signal | falls off as d1.215, shadowing 2.86 dB, fitted on 5,468 readings from this session |
The propagation model was fitted on this session and scored on it, so these metres are the best this room allows and not what the method would do on a floor it had never seen. Read the gap, not the decimal: a few metres is what beacons give you, and it is why this project measures what the room does to a Wi-Fi signal instead of how loud a beacon sounds.