数字正射影像结合LiDAR数据在山区测绘中的应用

随着信息化社会的到来，现代水利测绘已经由传统测绘向信息化测绘发展，无人机技术应用于测绘行业推进了信息化测绘进程。本文探讨了如何有效利用无人机技术解决测绘领域在山区遇到的问题。固定翼无人机能及时获取地面数字正射影像数据，捕获裸露地面的平面和高程，但是无法获取植被覆盖下的地表高程信息，因此，本文通过机载激光雷达获取植被覆盖下的LiDAR点云数据；将二者数据相结合，再通过EPS软件生成三维地表模型，可以快速获取任何测区地物和地形数据，不仅提高了工作效率，还降低了外业劳动强度。

Application of digital orthophoto image combined with LiDAR data in mountain surveying

With the advent of information society, modern water resources surveying and mapping has developed from traditional surveying and mapping to information surveying and mapping. Application of UAV technology in surveying and mapping industry promotes the process of informatization surveying and mapping. This paper discusses how to effectively use UAV technology to solve the problems encountered in the field of surveying and mapping in mountainous areas. Fixed-wing UAV can acquire the digital orthophoto image data of the ground in time to capture the plane and elevation problems of the bare ground, but the elevation information of the ground under vegetation coverage can not be obtained. At this time, LiDAR point cloud data under vegetation coverage can be obtained by airborne LiDAR. Combining the two data, the three-dimensional surface model generated by EPS software can quickly obtain the topographic and topographic data of any surveying area, which not only improves the efficiency of water resources surveying and mapping, but also reduces the intensity of field work.