A system for generating and managing maps of a plurality of real-world environments, the system comprising a map generation unit operable to generate a map of each of the plurality of real-world environments, a wireless signal identification unit operable to identify one or more wireless signals at one or more locations in each of the plurality of real-world environments, and to associate the identified signal information with a map corresponding to the same real-world environment, and a compiling unit operable to compile the respective generated maps into a composite map, wherein the respective generated maps are arranged in dependence upon the wireless signals identified in each of the corresponding real-world environments.