You already knew it ,each time you access Google latitude,Google maps, Orkut,Google plus or other Google web services which includes location sharing there is an option that always pops out other Google web services there is a option maps, or perhaps with a reminder would you like to share your location ? with an option to enable or disable the location sharing feature. While location based services are not rocket science anymore and it has nothing to do with GPS or geosynchronous satellites or say its not a rocket science since the location services used on web services like for eg; updating your status with current location are actually location database, which matches publicly broadcast information looking for wireless access points that are close to a user’s phone/computer. or in short your Wifi router/modem data is used to determine your location while accessing location based services.
