Application of terrestrial 3D laser scanning technology in spatial information acquisition of urban buildings

Terrestrial 3D laser scanning technology has provided a new method for obtaining the spatial information of urban buildings, because of its high accuracy and contactless model, can obtain large amount of 3D coordinates point cloud data of the target. This paper describes in detail the office and field work process and key technologies of the spatial information acquisition of urban buildings using the multi terrestrial 3D laser scanning technology. And the experiment results show that the point precision of the spatial information is reliable, and the 3D reconstruction model is higher accurate, which can meet the requirements of the building facade extraction and indoor area measurement.