机载LIDAR点云数据的处理及检校

Processing and Calibration of Airborne Lidar Point Cloud Data

利用机载LiDAR技术获取较大范围地面三维信息比传统测量方法具有高精度、高密度、速度快、成本低的优点,已成为国土资源管理领域一个重要支撑技术。在实际应用中,激光点云数据处理及其检校是生产的关键环节,直接影响成果质量和作业效率。该论述结合测制我国西部某测区带状4D成果的应用实例,综合分析了原始激光点云数据的获取、标准激光点云数据的制作及其分层分类处理等关键过程和需要注意的问题,详细论述了标准激光点云数据的检校及其检校精度检测的方法步骤,分析评估了检校精度对激光点云平面和高程精度的影响,可为同类工程提供借鉴。

Airborne LiDAR technology which is used to obtain large range of ground three-dimensional information than traditional measurement method has high precision, high density, high speed, low cost advantages, It has has become an important support technology in the field of land and resources management. In practical applications, the laser point cloud data processing and the calibration is a key link in the process of production, directly affect the productions of quality and work efficiency. Combining with the application example of measuring the 4D results about the survey area in western of China,This paper discusses the key processes and problems needing attention in the acquisition of the original laser point cloud data, the production of standard laser point cloud data and its hierarchical classification and processing, and discusses the method steps of the standard laser point cloud data inspection and its calibration accuracy detection in detail, analyses and evaluates the influence of calibration accuracy on the plane and elevation accuracy of Laser point cloud,which can provide reference for similar projects.