5. 仕組み
∧_∧
( ・ω・)
_(__つ/ ̄ ̄ ̄/
\/ /
 ̄ ̄ ̄\ (現在位置) (Wi-fi) ( GPS )(基地局情報)(Bluetooth)(IPアドレス)
\┗(^o^ )┛ ┗( ^o^)┛┗( ^o^)┛┗( ^o^)┛ ┗( ^o^)┛ ┗( ^o^)┛
\┏┗ ┛┓ ┛┓ ┛┓ ┛┓ ┛┓
 ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄ ̄
Earlier, websites would use the IP address to determine your approximate location
but with the HTML5 Geolocation API, web browsers can more accurately detect your
location using data from GPS, Wi-Fi networks, cell towers, Bluetooth and the computer’s
IP address. If you agree to share your location with the browser, it will send these details
to Google Location Services for estimating your location which is then shared with the
requesting website.
http://www.labnol.org/internet/geo-location/27878/