利用地面激光雷达与无人机技术制作大型古塔立面正射影像图

以保俶塔为例，探讨了利用地面激光雷达和无人机技术制作大型古塔立面正射影像图的技术流程及关键问题。实践证明:基于地面激光雷达点云制作的古塔立面正射影像图，消除了普通相片带有的投影误差和高程误差，精度满足工程要求；同时利用无人机技术采集古塔立面纹理，有效克服了脚手架遮挡等问题，不仅大大减少了数据内业处理的时间，而且最大程度保证了古塔纹理的真实性，为古塔结构的安全评估工作提供了第一手真实资料。

Using the Ground Lidar and Unmanned Aerial Vehicle Technology to Produce the Ortho-elevation Orthophoto Map of Large Ancient Tower

In this paper, Baochu tower as an example, to explore the use of ground-based lidar and unmanned aerial technology to produce large-scale tower orthophotos orthophoto map technical process and key issues. Engineering practice proves that, based on the point cloud, the large-scale tower tower orthophoto map can effectively eliminate the projection error brought by the traditional photos and meet the engineering requirements. At the same time, the UAV technology is used to collect the ancient tower facade texture, Effectively overcome the scaffolding occlusion and other issues, not only greatly reduces the data processing time within the industry, but also to ensure the greatest degree of authenticity of the ancient tower texture for the next step pagoda structure safety assessment work provides first-hand real information.