基于无人机载激光雷达的库区高精度DEM生成

High precision DEM generation in the reservoir area based on UAV airborne LiDAR

无人机载激光雷达遥感技术是空间信息技术的新发展,与传统卫星遥感、载人航空遥感相比,具有灵活方便、成本低、受外界环境影响小、分辨率高、信息量丰富、全天候全天时的工作特点,比较适合我国山区或地理环境复杂区域的航拍工作,是未来对地观测领域的必备手段之一。它与卫星遥感、载人航空遥感有较好的互补性,可组成星基、空基、地基结合的遥感观测平台。基于DRAGON50无人直升机载可见光雷达系统,以怀柔水库为研究区,同步采集了高分辨率影像和激光雷达点云数据,改进了传统的点云处理流程,制作了研究区高精度的DEM。结果表明,基于无人机载激光雷达生成的库区高精度DEM具有良好的应用效果。

Airborne LiDAR of unmanned aerial vehicle（UAV）remote sensing technology is a new development of spatial information technology,compared with the traditional satellite remote sensing,manned aerial remote sensing.It has advantages of strong real-time,flexibility and convenience,low cost,little influence by the external environment,high resolution,low-flying under clouds and ability to work full-time on all-weather all day.It is one of the necessary measures for the field of earth observation in the future,which is suitable for the aerial photography work in the mountainous area or the complex geographical area in China.It has good complementarity with satellite remote sensing and manned aerial remote sensing,and can be used to form a remote sensing observation platform integrated by satellite-based,air-based and ground-based.Taking Huairou Reservoir as the research area,high-precision LiDAR point cloud data and image were collected based on the visible light radar system of Dragon50 unmanned helicopter at the same time,and improved traditional point cloud processing flow,and high precision digital elevation model（DEM）has been carried out.The results show that the high precision DEM based on UAV LiDAR system has good application effect.