基于背包式激光雷达的林木胸径和树高提取

Extraction of Individual Tree DBH and Height Based on Backpack LiDAR

背包式激光雷达扫描系统易操作、查看简洁方便、效率高,但目前还没有广泛应用到林业调查中。本研究通过利用背包式激光雷达扫描数据提取样地单木胸径、树高,计算相应蓄积量,为森林调查工作提供参考。采用LiBackpack 50背包式激光雷达对广西派阳山林场的7个样地树木胸径、树高进行数据采集,通过数据处理软件LiDAR 360提取胸径和树高,测算蓄积量。结果显示,密度较小,杂灌较少,通视条件较好、干形规则的样地,胸径、树高实测值与提取值间的相关性较高,蓄积量差异较小,可采用激光雷达进行森林资源辅助调查。

The backpack LiDAR scanning system is easy to operate,simple and convenient to view,and high in efficiency,but has not been widely used in forestry investigation.This paper used the backpack LiDAR scanning data to extract the DBH and height of individual trees in sample plots and calculate the volume,which provided reference for forest investigation work.LiBackpack 50 LiDAR was used to collect the data of DBH and height of trees in 7 sample plots of Paiyangshan Forest Farm in Guangxi.The DBH and height were extracted by the data processing software LiDAR 360,and the volume was calculated.The results showed that for the sample plots with small density,less miscellaneous shrubs,good visual condition and regular trunk shape,the correlation between the measured values and extracted values of DBH and tree height was high,and the difference of volume was small,which could use LiDAR for the auxiliary investigation of forest resources.