Episode 198: Location location location, revisited
Android Developers Backstage
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How to Use Wi-Fi to Improve Your Location
If you just want to say like get an Uber to come into your house or order you know food delivery the GPS isn't going to work so we need to get Wi-Fi. Wi-Fi access points don't tell you where they are but they have a MAC address. So nominally it starts from GPS but we get actually a lot more complicated than that. We can use like inertial sensors take how many steps you took since you had that GPS when the GPS got when it got strong.
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