摘要
DEM质量检验规范对水域部分“高程一致性”及“水面光滑平整性”的基本要求,使得在生产水域DEM时,参与了大量的人工后期编辑工作,致使效率低下。为摆脱这一传统工作模式,本文通过探讨机载LiDAR中面状水域部分与其周边点云的不同结构特点,运用TIN外接圆半径大小的差异性,分离面状水域与非水域三角网,以完成对面状水域边界的提取与水域空洞的点云修复,借助C语言编制点云处理程序,并针对某自然村进行机载LiDAR扫描与该方案的程序测试。测试结果表明:该程序化解决方案能够快速识别测区水域边界,以水域边界最低点高程值修复水域空洞,使其DEM完全满足DEM质检规范对水域的基本要求,效率上较传统水域DEM处理模式有大幅提高,获得较好的测试效果。
The basic requirements of DEM quality inspection standard for"elevation consistency"and"water surface smoothness"of water area make a lot of manual post editing work involved in the production of water area DEM,resulting in low efficiency.In order to get rid of this traditional working mode,by discussing the different structural characteristics of the surface water area in the airborne LiDAR and its surrounding point cloud,and using the difference of the radius of the circumscribed circle of TIN,the surface water area and non water area triangulation are separated to complete the extraction of water area boundary and the point cloud repair of surface water area cavity.The point cloud processing program is compiled with the help of C language,The airborne LiDAR scanning and the program test of the scheme are carried out for a natural village.The test results show that the programmed solution can quickly identify the water boundary of the survey area,repair the water cavity with the elevation value of the lowest point of the water boundary,make its DEM fully meet the basic requirements of DEM quality inspection standard for water area,greatly improve the efficiency compared with the traditional water DEM processing mode,and obtain better test results.
作者
陈建城
Chen Jiancheng(Ningxia Water Resources and Hydropower Survey,Design and Research Institute Co.,Ltd.,Yinchuan 750004,China)
出处
《科技通报》
2023年第5期25-28,共4页
Bulletin of Science and Technology
基金
陕西省教育厅专项科研计划项目(18JK1105)。
作者简介
陈建城(1980-),男,本科,高级工程师,主要从事水利水电、测绘等相关工作及研究。E-mail:3112251297@qq.com。
