How does HTML5 know my location?
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It seems that the JS location request gets pretty much exact location. That can't be IP based, can it? How does it know my location?
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Answer:
HTML5 doesn't specify how the calculation is done, only how the data is made available. It could be using GPS hardware in the device (like a phone), it could trilateration (people incorrectly often say triangulation) using info about nearby cell towers. It could use a database of WiFi hotspots. It could use an IP database. It could be a user entered preset in theory (don't recall anything in the specs forbidding that).
Robert Accettura at Quora Visit the source
Other answers
It might use WiFi based GeoLocation as well: http://shop.empeeric.com/how-does-wifi-geolocation-work/
Refael Ackermann
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