There are methods for locating people, including mobile phone base station positioning, satellite positioning and other methods. However, most of these positioning are based on plane longitude and latitude positioning. At most, the approximate altitude can be known, but the accurate height cannot be known.

Floor indoor positioning systems are currently being developed and applied. This kind of positioning is decimeter-level positioning. It can accurately know which floor a person is on and where in the room it is. However, it is not mature enough, has a relatively high cost, and is rarely used.

I did indoor positioning two years ago. The mainstream technologies available at that time were Wifi hotspots and Bluetooth. The principles of outdoor positioning are completely different, and there are currently no mature products. It is also very troublesome to use. First, the area to be located must have enough hot spots. Secondly, before use, the area must be scanned to obtain fingerprint data before use.

Which room on which floor? It shouldn’t be possible yet, domestic map