摘要
为满足河道精细化测绘需求,提高内、外业工作效率,该文提出在数据采集阶段优化多机型航测技术应用,在数据处理阶段,融合无人机影像与LiDAR点云数据,充分发挥二者优势,制作高精度彩色点云、DOM、DEM、DSM及实景三维模型,基于多源航测成果综合判绘河道地形及断面。在长江下游复杂河道实践应用中表明,该技术方案无论是作业效率还是成果精度质量均满足河道勘测要求。因此,该方法适用于新形势下多类型河道精细化勘测需求,可显著提高地形图、断面图测绘的准确性和高效性。
Low-altitude unmanned aerial vehicle(UAV)aerial survey systems mainly adopt multi-rotor models,equipped with adjustable single-lens cameras,multi-lens cameras or airborne LiDAR systems.They have the advantages of strong flexibility,high positioning accuracy,and reduced reliance on ground control points,and can obtain vertical and oblique images.The airborne LiDAR system,based on laser radar,POS,digital cameras,etc.,can generate high-precision point clouds,DOM,DEM,DSM and real three-dimensional models,improving the efficiency of terrain and landform interpretation.In view of the terrain characteristics of the middle and lower reaches of the Yangtze River,it is proposed that in the data acquisition stage,the application of multi-type UAV aerial survey technology should be optimized;in the data processing stage,the UAV images and LiDAR point cloud data should be integrated to give full play to their advantages,so as to improve the accuracy of topographic maps and operational efficiency,and promote the development of river channel surveying towards refinement.
出处
《科技创新与应用》
2025年第36期124-129,134,共7页
Technology Innovation and Application
