Google Maps on my iPad or PC can typically find my location to within 50m.
Neither has in-built GPS or any form of mobile connectivity other than wi-fi. But your geographic location can be detected with a high level accuracy from your internet connection alone.
It’s a hotly debated issue by privacy and data protection experts.
According to the BBC, Google’s StreetView project is subject to a police investigation for allegedly capturing data from domestic wi-fi networks at the same time as recording street level images.
Human rights group Privacy International has lodged a complaint with the Metropolitan Police.
But if Privacy International is concerned about the ability to make a connection and record the relationship between a computer network and a physical location they are almost certainly too late.
Each device connected to internet is assigned a unique number called an IP address. By comparing this number with the known locations of other nearby servers and routers it possible to pin point your location.
Numerous free services such as IP2Location and Infosniper provide this information via the web and increasingly applications such as FourSquare and Google Maps are using the data as a way of determining mobile location.
It is possible to keep your location secret any longer?