Emplacement est incorrect quand près d’un réseau de WiFi mobile

Location is incorrect when near a moving WiFi network

Avant de comparer un smartphone pliable, il faut toujours analyse les différents modèles disponibles sur le marché. Lequel, permettra vraiment de regarder les jokes tous les jours de manière confortable ?

tout le monde a remarqué cela ? Vous êtes dans un train et vous souhaitez voir votre localisation pour ouvrir Google Maps. Le point bleu vous montre quelque chose environ 200 miles.

Ensuite, vous remarquez que le point bleu est à une station de train et rendu compte que c’est sur la même ligne, le train est sur et aurait été là.

J’ai vu plusieurs fois. Clairement Google est en utilisant le train WiFi pour déterminer l’emplacement mais ne pas se rendre compte que ce réseau WiFi n’est pas dans un lieu géographique déterminé.


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6 réflexions au sujet de “Emplacement est incorrect quand près d’un réseau de WiFi mobile”

  1. I thought my phone’s GPS was crazy when I was on the train, actually forgot this was a possibility. So it plain ignores the GPS signal? How does that even work?

  2. When I was in high school I was in the FRC robotics competition. The robots were linked to a field management system which was a Wi-Fi network, and the arenas the competitions were in often didn’t have other Wi-Fi networks. Because the game fields were broken down and shipped between arenas, phones would guess their locations were at the previous field location.

  3. I boarded a train from Vienna to Munich, inbound from Budapest. Google really thinks I’ve been to Hungary and magically popped back to Munich at light speed.

  4. It will ping your location through the net and use that to help get your GPS location quicker as it will have some idea where you are. That’s why your phone is quicker at getting your location then a stand alone GPS. Can also ping cell towers to do it as well. You should be able to turn it off under location settings

  5. WiFi scanning uses less battery/power than GPS.

    To start getting a signal from GPS, you need to know an approximate location and time (yes, you need location to get location). Once you do get the first location result, it’s easier.

    Remember when the first GPS location would take many many seconds to come up on earlier versions of Android? Pepperridge farm remembers.

    Google has [collected WiFi SSID/MAC addresses](https://www.zdnet.com/article/google-explains-why-street-view-cars-record-wi-fi-data/) on their street view cars.

    Once you have a ton of this data, it’s not difficult to think that Google could train an ML model to identify location from scanned WiFi data.

    But this would mean they send the scanned SSID data up to the cloud to run this ML model, or… does it?

    WiFi scanning does not nessesarily mean you’re actually connected to the internet. And in fact, you don’t have to be. You could block all data, and this would still work.

    This model runs entirely on device. It’s tiny, it’s low power, it’s very accurate. It’s probably one of Google’s very first ML on-device models.

    Also, Android 9+ and newer requires Location permission to scan WiFi networks, because Google has finally discovered that if they can do the WiFi SSID to Location association… so can a bad actor.

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