A personal location system including signal-transmitting RFID tags
associated with various landmarks, such as hallways of buildings. The
system's personal receiver is preloaded with information about the
building, equivalent to a map, and receives the RFID signals. These
signals, in conjunction with the stored map, allow the environment to be
displayed, and the location of the user to be identified. The receiver
may be loaded with the map information by means of a device(s) located at
the entrance(s) of the building.