Aspects of the subject disclosure may include, for example, a process that determines a current location of a mobile device according to a horizontal reference, obtains a corresponding barometric pressure reading at the current location of the mobile device, and determines a current position of the mobile device according to the current location of the mobile device and the corresponding barometric pressure reading. A historical record of positions of the mobile device is updated according to the current position of the mobile device and other positions of the mobile device determined at other times, and a historical record of positions of the mobile device to a map of a facility is updated to obtain a referenced pattern of movement of the mobile device within the facility. Other embodiments are disclosed.