Research on Application of Airborne Three-Dimensional Laser Scan Technology in Highway Terrain Measurement
[Purposes]With the development of technology,the traditional surveying method can not meet the demand of highway topographic survey.The emergence of 3D laser scanning measurement technol-ogy has greatly promoted the development of surveying and mapping technology,and the data acquisition method,processing method,service ability and level have been improved,therefore 3D laser scanning measurement technology can be applied to highway topographic survey to improve survey efficiency.[Methods]This paper mainly studies the process of airborne 3D laser scanning technology used in high-way topographic survey data scanning acquisition and subsequent data preprocessing,mathematical mod-eling and topographic map drawing.[Findings]The point cloud data obtained by 3D laser scanning were processed and analyzed in combination with the two representative projects of G310 Zhengzhou-Jingcheng reconstruction and expansion project in plain area and the highway from Minggang to Jigong-shan in Dabia Mountain area.The 1∶2 000 strip topographic map along the road was drawn and ana-lyzed.It is shown that the airborne 3D laser scanning technology has achieved the expected effect in highway topographic survey.[Conclusions]The accuracy of DOM,DTM and DLG products obtained from airborne 3D laser scanning point cloud data and image data can meet the requirements,and can be directly applied to highway survey and design.
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