The mapcode system is an open-source geocode system consisting of two groups of letters and digits, separated by a dot. It represents a location on the surface of the Earth, within the context of a separately specified country or territory. For example, the entrance to the elevator of the Eiffel Tower in Paris is “France 4J.Q2”. As with postal addresses, it is often unnecessary to explicitly mention the country.
The mapcode algorithm defines how a WGS 84 coordinate (a latitude and longitude) can be converted into a mapcode, and vice versa. Mapcodes may be supported on an automotive navigation system.