Abstract: A real-time location system (RTLS) includes wireless signal collectors, gateway devices, wireless tags, mobile devices, server, and web portal. The gateway devices receive sense signals associated with targets from the wireless signal collectors. Each of the sense signals includes a measurement value (e.g., a RSSI value), an identification of respective wireless signal collector, and an identification of a wireless tag or mobile device of a target. The gateway devices calculate the current geographical location of the targets based on the sense signals. The gateway devices send location data of the targets to the server for further processing and storing in a data storage. The web portal is operable to simultaneously display visual representations of real-time location data of multiple targets and statistical information.