林业科学2011，Vol.47Issue(12)：106-113,8.
多回波机载LiDAR数据提取林地DEM的判别分析方法
Determination of DEM Based on Multiple-Echo Data of Airborne LiDAR in Mountainous Wooded Area Using Discriminant Analysis
摘要
Abstract
Forest land with obvious open space was selected as modeling sample plot. The single- and multiple-echo airborne LiDAR data of the sample plot were obtained and analyzed in terms of three-dimensional coordinates distribution, reflection intensity distribution and vertical distribution. The forest digital elevation model (DEM) extraction method was developed using discriminant analysis. A closed forest with a large number of control points was selected for model validation. A total of 1 472 control points were measured. Results showed that it is feasible to extract DEM in the complex environment of the mountain forest using discriminant analysis method with variance of 0. 05. Its accuracy can reach mean elevation difference 0. 24 m. Data with elevation difference between - 0. 5 m and 0. 5 m amounted for 93. 85% of the total. The results from this study was compared to the ones obtained using direct grids/windows segmentation. It indicated that this method could have better simulation results.关键词
机载激光雷达/数字高程模型(DEM)/判别分析/多重回波Key words
airborne LiDAR/digital elevation model (DEM)/discriminant analysis/multiple echo分类
农业科技引用本文复制引用
尹艳豹,唐守正,郎璞梅,高瑞馨..多回波机载LiDAR数据提取林地DEM的判别分析方法[J].林业科学,2011,47(12):106-113,8.基金项目
国家973课题"主动遥感散射机理与植被三维结构参数反演"(2007CB714404) （2007CB714404）
林业公益性行业科研专项经费项目"我国典型森林类型健康经营关键技术"(201004002) （201004002）
