Before revision:  Also, due to the dynamically changing of the construction site and the consequent absence of a high definition map, the localization of mobile machines is still a challengingtask.
After revision:  Also, due to the dynamically changing of the construction site and the consequent absence of a high definition map, the localization of mobile machines is still challenging. Current SLAM technologies proposed for mobile machines are strongly dependent on costly or computationally expensive sensors, such as RTK GPS and cameras, so that commercial use is rare.