激光雷达技术在广西巨尾桉国储林调查中的应用  

Application of LiDAR Technology in Investigation of Eucalyptus grandis×E.urophylla National Reserve Forests in Guangxi

作　　者：韦高吉 罗盛万 刘曼曼 WEI Gaoji;LUO Shengwan;LIU Manman(Guangxi Forestry Group Guijiang Forestry Survey and Design Co.,Ltd,Nanning 530000,Guangxi,China)

机构地区：[1]广西林业集团桂江林业勘测设计有限公司,广西南宁530000

出　　处：《桉树科技》2025年第1期30-36,共7页Eucalypt Science & Technology

摘　　要：探讨激光雷达技术(LiDAR)在广西巨尾桉国家储备林调查中的应用效果,以验证其测量的准确性及在林分参数提取中的适用性。通过无人机搭载riegl 1350 LiDAR与riegl 850地基LiDAR结合常规人工调查,对比分析巨尾桉株数、胸径和树高等关键参数。采用R^(2)检验、均方根误差(E_(RMSE))等评价指标,对融合点云数据在桉树样方内株数、胸径、树高测量上的适用性进行检验。结果显示:融合点云数据提取的单木因子(株数、胸径和树高)与广西(2006年)巨尾桉树高模型计算值及实测值之间具有很高的相关性且误差较小;R^(2)值均接近1,树高E_(RMSE)为1.28、3.52 m,表明所建模型具有较高的适用性,地载和机载LiDAR融合技术在林业调查中测量关键参数的准确性和适用性较高。This study investigated the application of LiDAR(Light Detection and Ranging)technology in the national reserve forest survey of Eucalyptus grandis×E.urophylla in Guangxi,with the aim of assessing its accuracy and applicability in extracting stand parameters.The study integrated data from RIEGLVZ-1350 airborne LiDAR mounted on unmanned aerial vehicles,RIEGLVZ-850 terrestrial LiDAR,and conventional manual surveys.A comparative analysis was conducted on key parameters,including tree count,diameter at breast height(DBH),and tree height of E.grandis×E.urophylla.Evaluation indicators such as R^(2) test and root mean square error(E_(RMSE))were used to test the applicability of the fused point cloud data in measuring the number of trees,DBH and tree height within the Eucalyptus sample plot.The results showed that there was a high correlation and small error between the single-tree factors(number of trees,DBH and tree height)extracted from the fused point cloud data and the calculated values and measured values of E.grandis×E.urophylla tree height model in Guangxi(in 2006).The R^(2)values were all close to 1,and ERMSE of tree height were 1.28 m and 3.52 m respectively,indicating that the established model had high applicability,and the ground-based and airborne LiDAR fusion technology had high accuracy and applicability in measuring key parameters in forestry surveys.

关 键 词：激光雷达技术 巨尾桉 树高曲线方程 

分 类 号：P237[天文地球—摄影测量与遥感] S757.2[天文地球—测绘科学与技术]