Google My Location in Google Maps is able to find your approximate position with good accuracy. Although it's clear that it makes use of GeoIP mapping, they need a more accurate strategy to pinpoint your location.
It is claimed that it uses the WiFi access point information to pinpoint your location. However, I don't understand the strategy behind this.
Did they map the WiFi access points around the world with the Google car? Or do some access points provide information about their coordinates (obtained via GPS)?
Best Answer
It's mostly up to the browser to implement. One example, which is used on the iPhone & iPod touch to help determine location, is SkyHook Wireless.
From the Maps help page:
The geolocation feature, if built in to the browser, is accessed via Javascript with
navigator.geolocation
:More usage info is at the Mozilla Developer Center.