Abstract: A computer assisted system for providing navigational assistance to a user towards a desired destination associated with a facility includes an electronic communication device running an application providing an indoor and outdoor location information associated with the facility and a real-time, dynamic, interactive navigational assistance information to the desired destination, a number of three-dimensional indoor positioning devices installed at the facility for identifying a real-time location of the electronic communication devices and a server in communication with the electronic communication devices over a wireless communication channel for storing the indoor and outdoor location information associated with the facility.