Method and system for localizing tracking devices

An item tracking system comprising

• a processor;
• and
• a memory storing a set of instructions, the instructions executable in the processor to:
• receive, from a tracking device, satellite based data indicative of an outdoor location of the tracking device, the tracking device being associated with an item to be tracked;
• identify a location state of the tracking device as one of an indoor location indicative of the tracking device being inside an indoor facility and the outdoor location with respect to the indoor facility, based on at least one of the satellite based data and connectivity to an access point device of the indoor facility;
• when the tracking device is in the indoor facility, receive, from the access point device, indoor localization data of the tracking device, the indoor facility including a set of tracking devices, the indoor localization data comprising at least one of signal data and sensor data, the signal data including information of wireless signals received from one or more other tracking devices in the set within a predetermined distance from the tracking device, the sensor data including one of inertial data and ambient environment data associated with the tracking device;
• and
• localize the tracking device, based on the indoor localization data and at least one of a position of the access point device in the indoor facility and a position of at least one other tracking device in the set in the indoor facility;
• and