摘要
为探寻一种可靠且成本低廉的森林冠层高度调查方法,以机载激光雷达生成的相关产品为基准,对无人机密集匹配点云生成的数字表面模型(dense digital surface model,Dense_DSM)、数字高程模型(dense digital elevation model,Dense_DEM)、冠层高度模型(dense canopy height model,Dense_CHM)以及Dense_DSM与激光雷达点云生成的数字高程模型(LiDAR_DEM)联合生成的冠层高度模型(union canopy height model,Union_CHM)进行差异性分析。结果表明:1)单纯的密集匹配点云能够较准确地获取低郁闭度情况下桉树林的冠层高度,平均误差为1.78 m;2)中高郁闭度情况下,单纯的密集匹配点云无法获取准确的冠层高度;3)在准确地形支持下,密集匹配点云可以准确地获取所有郁闭度情况下的森林冠层高度,平均误差为-1.41 m。无人机密集匹配点云在冠层高度调查中具有一定的应用潜力与推广价值。
To explore a reliable and low-cost method for forest canopy height investigation,based on the relevant products generated by airborne LiDAR,differential analyses were conducted on the dense digital surface model(Dense_DSM),dense digital elevation model(Dense_DEM),dense canopy height model(Dense_CHM)generated by drone dense matching point clouds,as well as Union_CHM generated by Dense_DSM and LiDAR_DEM.The results showed that:1)Under low canopy closure conditions,the dense matching point cloud alone could accurately obtain the canopy height of eucalyptus forests,with an average error of 1.78 m;2)Under medium and high canopy closure conditions,the dense matching point cloud alone was unable to accurately obtain the canopy height;3)With accurate terrain support,the dense matching point cloud could accurately obtain the forest canopy height under all canopy closure conditions,with an average error of-1.41 m.Drone dense matching point cloud has certain application potential and promotion value in canopy height investigation.
作者
陈依依
郭道峰
CHEN Yiyi;GUO Daofeng(Guangxi Forest Resources and Ecological Environment Monitoring Center,Nanning 530025,Guangxi,China;Guangxi Forest Inventory and Planning Institute,Nanning 530011,Guangxi,China)
出处
《中南林业调查规划》
2025年第2期57-61,共5页
Central South Forest Inventory and Planning
基金
国家重点研发计划项目“森林资源天空地一体化综合检测——广西应用示范”(No.2023YFD2201705-7)。
关键词
无人机
密集匹配点云
激光雷达点云
树高调查
unmanned aerial vehicle
dense matching point cloud
LiDAR point cloud
tree height survey
作者简介
陈依依(1988-),女,湖南娄底人,本科,工程师,主要从事林草资源监测与信息化研究工作。E-mail:280518786@qq.copm;通信作者:郭道峰(1992-),男,广西凤山人,本科,工程师,主要从事森林资源调查、林业规划设计工作。E-mail:752249510@qq.com。
