[ruined]

through the api

https://developers.google.com/maps/documentation/geolocation...

there are also many open source wifi location databases that can be downloaded and queried locally

devices listening to ssid broadcasts for this purpose are common at grocery stores, malls, political protests, and more

[onionisafruit]

That API requires the MAC address of a wifi access point. You can't get that from a client probing for a hidden ssid.