Hello,

Have a look here:
interested to know how this might work - location tracking

Bertus

 

How does this work?
https://lynqme.com/

The website doesn't offer enough information to know. But if I had to guess -- it's a display that has a microcontroller, a gps, and a radio transceiver of some sort. The GPS in each unit accurately locates itself and transmits the lat/long to nearby units. The unit uses its own GPS coordinates and the coordinates it received from others to calculate range and bearing. (Look up Vincentey's formula: https://en.wikipedia.org/wiki/Vincenty's_formulae).

 

Yes @Mark Hughes. I think it uses a more simple formula (for close distances).

But is this an answer to this thread? I do not want to calculate distance and bearing. I just want to use the other's device coords to point its location on my map

 

Yes @Mark Hughes. I think it uses a more simple formula (for close distances).

But is this an answer to this thread? I do not want to calculate distance and bearing. I just want to use the other's device coords to point its location on my map

No -- I don't think that device is what you are looking for. I think the best choice so far is the aprs radio tracker I linked before. Here's an example of what you'll see: https://aprs.fi/#!lat=60.169998&lng=24.94 Here's one with higher use density: https://aprs.fi/#!lat=60.169998&lng=24.94

But I've never used that specific device, so I don't know how well it works, how durable it is, etc...