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Position: Home > Articles > The Effects of Airborne LiDAR Point Density on Forest Height Estimation Forest Research 2008,21 (1) 14-19

点云密度对机载激光雷达林分高度反演的影响

作  者:
庞勇;李增元;谭炳香;刘清旺;赵峰;周淑芳
单  位:
中国林业科学研究院资源信息研究所
关键词:
LiDAR;点云密度;林分平均高
摘  要:
以山东省泰安市徂徕山林场和重庆铁山坪林场为试验区,分别于2005年5月和2006年9月获取了低密度和高密度的L iDAR点云数据,分别进行了林分平均高的反演试验。通过两个试验区的对比,分析了不同点云密度对机载L iDAR数据反演林分参数的影响。结果表明:对于两种密度的点云数据,使用分位数法都可以很好地进行林分平均高的估计,高密度点云的反演结果略好一些,但二者结果差异不大;高密度的点云可以进行更小尺度的林分高估计和单木树高的估计,从而可以减少甚至避免对实地树高测量的依赖。
译  名:
The Effects of Airborne LiDAR Point Density on Forest Height Estimation
作  者:
PANG Yong,LI Zeng-yuan,TAN Bing-xiang,LIU Qing-wang,ZHAO Feng,ZHOU Shu-fang(Research Institute of Forest Resource Information Techniques,CAF,Beijing 100091,China)
关键词:
LiDAR;point dansity;stand mean height
摘  要:
This paper takes Culaishan Forest Farm,Shandong Province,and Tieshanping Forest Farm,Chongqing,as test sites.The airborne discrete return LiDAR data were collected in May of 2005 and September of 2006 seperately.The forest height was estimated for both test sites.Through the camparison of the two sites,the effects of airborne LiDAR point density on forest height estimation were analyzed.The results demonstrated that it was feasible to use low and high point density airborne LiDAR data to estimate forest height.Quartiles could give good tree height estimation in the low LiDAR point density case.The accuracies from high density LiDAR data showeds only a little better than low density data.The high density data could be used to estimate finer scale forest height even individual tree height,which is helpful to minimize necessity of the number filed plots.

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