What affects accuracy
- Number and position of visible satellites
- Signal reflections from buildings (multipath)
- Obstructions such as roofs, tunnels, car parks and metal
- Atmospheric conditions
- Antenna quality and placement
- Whether multiple GNSS constellations are supported
Typical accuracy by method
| Method | Typical accuracy | Notes |
|---|---|---|
| GNSS outdoors, open sky | A few metres | Best case |
| GNSS in dense city | Tens of metres at times | Reflections cause drift |
| Wi-Fi positioning | Tens of metres | Works indoors in built-up areas |
| Cell tower (LBS) | Hundreds of metres to kilometres | Fallback only |
Getting the best results
Mount devices with a view of the sky through plastic or glass, choose multi-constellation hardware and use filtering in the platform to smooth out short-lived jumps.