Research on the Application of Ground 3D Laser Scanning Technology in Surveying and Mapping of Road Reconstruction and Expansion

The ground 3D laser scanning technology has the advantages such as normal traffic flow, large amount of data and high efficiency, so it is suitable for application in surveying and mapping of existing road reconstruction and expansion. This paper takes a specific road reconstruction and expansion project as an example to study the process which is suitable for 3D laser scanning technology from the survey program design, equipment selection, geodetic chain and target layout aspects. In the meantime, related software to complete the point cloud data filtering, splicing, coordinate conversion and simplification are utilized along with the CASS software to generate DTM model for road reconstruction and expansion design. It turns out that this technology has high data accuracy. According to the test results, the difference between the data obtained by this technology and by traditional measurement methods respectively is under 4 mm. It can fully meet the design requirements of road reconstruction and expansion and has very good application prospects.