[skowalak]

A similar project that also tracks cell towers and bluetooth beacons in addition to WiFi is https://beacondb.net . Since Mozilla Location Services shut down they have been a good alternative for geolocation and they are public domain. Unfortunately, data dumps are currently not available, though.

[eliaspro]

The great thing about BeaconDB: the API-compatibility to MozillaLocationService. So apps just need to update their endpoint to continue working.