Abstract
Based on the RIEGL 3D scanning system, this paper studies the key technical methods of 3D laser scanning technology in the whole process of data acquisition, data processing and topographic mapping, and forms an effective technical route of 3D laser scanning technology in large scale topographic mapping.The transformation relationship among the coordinate system of the scanner itself, the engineering coordinate system, the global coordinate system and the image machine coordinate system is explained.The point cloud data registration, “non-topographic point” filtering technology, arbitrary point cloud data network construction technology and other technical methods are introduced.Better results can be achieved through multi-station acquisition and the combination of GPS and ground 3D laser scanning system.
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