Abstract: The traditional way of road surveying and mapping mainly uses GNSS, total station and level. The data format can only be a single point of coordinate or elevation, and there is a certain general error. In order to improve the data integrity, process simplicity and operational safety of road mapping, we tested the practice and application of ground static 3D laser technology. This paper mainly introduces the application of Trimble Realworks point cloud processing software, TBC advanced version software combined with SLAM mobile scanner in road surveying and mapping, and probes into its external measurement workflow method and precision control means. Through processing and analyzing the point cloud, the road survey, DEM modeling, contour drawing, vertical and horizontal section generation and other surveying and mapping production are carried out. In the later period, the accuracy of the data results is checked. The results show that Trimble Realworks point cloud processing software, combined with SLAM mobile scanner and TBC data processing software, can meet the needs of external data collection, internal data processing and external road layout in highway surveying and setting. It is worth popularizing and applying in highway survey.

Key words: highway engineering surveying, Trimble RealWorks point cloud processing software, point cloud processing and application, TBC channel module, ground static 3D laser scanner, SLAM near earth scanner