Google Maps is an amazing and often indispensable service, and a big part of that is just how good it is at figuring out where you are. And the reason it's so good at is, like so many things Google does, lots and lots of data. Maps doesn't just use GPS to find, but also a huge database of home and business Wi-Fi networks the company has mapped out over the years via crowdsourcing and Street View cars. You can set your phone to GPS-only, but what if you want to hinder Google from collecting data on your Wi-Fi network? There's a solution for that: Just add "_nomap" to the end of your SSID.

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