CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY CORDELIA MOLLOY / SCIENCE PHOTO LIBRARY
GPS receiver on a map. GPS (Global positioning system) uses a network of satellites to calculate the user's location on Earth. Each satellite sends a signal that is detected by the handset, and it calculates its position by triangulation. This handset is showing a position accuracy of 39 feet (just under ten metres). GPS is often used by recreational walkers and ramblers.
Model release not required. Property release not required.