The middleware layer consists of several servers and software systems, which store and retrieve location data, matches and updates the locations on the construction site map, calculates and adjusts location data, and performs other management functions such as data maintenance, load balancing, and system log management.
The application layer consists of a series of human machine interfaces (HMIs) for end user.
Those compatible display terminals include multimedia dispatchers, personal computers, and portable devices such as smart phones and tablet computers.
The main function of this layer is to provide engineers and project managers with visual vision including the real-time trajectories of workers on site, information on work context awareness, and real-time safety risk assessment.