摘要
针对光学相机航空摄影测量技术在测制1∶500地形图中存在的植被覆盖区地面高程获取困难、过于依赖地面像控点等问题,使用机载激光雷达在不同地形中进行航测作业,分析点云成果及生产的地形图精度。结果表明:机载激光雷达技术在多种地形中均可免像控替代光学相机航测技术测制地形图,能更加准确的获取植被下地面高程,成果满足1∶500精度要求。
In view of the difficulties in obtaining the ground elevation of the vegetation covered area and relying too much on the ground image control points in the 1∶500 topographic map surveying and mapping by the optical image aerial photogrammetry technology,the airborne lidar is used to conduct aerial survey in different terrains and analyze the point cloud data and the accuracy of the produced topographic map.The results show that the airborne lidar technology without image control points can replace the optical image aerial survey technology to survey and map the topographic map in a variety of terrains,and it can obtain the ground elevation under the vegetation more accurately.The data collected meet the precision requirements of 1∶500.
作者
张钊
周伟
尚海兴
贺春林
张西龙
ZHANG Zhao;ZHOU Wei;SHANG Haixing;HE Chunlin;ZHANG Xilong(PowerChina Northwest Engineering Corporation Limited,Xi'an 710065,China;CHN Energy Tibet Electric Power Company Limited,Nyingchi 860019,China)
出处
《西北水电》
2022年第5期123-127,共5页
Northwest Hydropower
基金
中国电建集团西北勘测设计研究院有限公司科技项目(XBY-ZDKJ-2020-08、XBY-KJ-2021-14).
关键词
机载激光雷达
免像控
1∶500地形图
airborne lidar
without image control points
1∶500 topographic map
