And if that information is accurate, their precise location can be revealed using a process called trilateration. Here's an example. Imagine a man shows up on a dating app as "200m away".

This process is called trilateration, a more complex version of triangulation. Triangulation techniques cannot be used with GPS; instead trilateration is used because four reference points are needed: ...

This allows it to find its location via trilateration (not to be confused with triangulation). The accuracy of course is determined by the accuracy of the distance measurement to the satellites.

LBS combines various positioning solutions — including GNSS, and trilateration from cell towers, Wi-Fi hotspots and other signals of opportunity — to collect the most accurate location data possible ...

GPS altimetry works by using the geometric method of trilateration, which uses signals from four or more orbiting satellites. Altimeters used in aircraft are mounted within the aircraft’s ...