Estimation of tree height using terrestrial laser scanning at a mono-layered　Alnus hirsuta forest

Abstract

Chiho Shimada and Keiko Nagashima: Estimation of tree height using terrestrial laser scanning at a mono-layered Alnus hirsuta forest. Jpn. J. For. Plann. 54: 31~36, 2020 To estimate the tree height at a single tree level by using a terrestrial laser scanning,we scanned a high-density mono-layered Alnus hirsuta forest. Using the point cloud data generated from this scan,tree height was estimated by two methods: （1）extracting the maximum Z height inside the buffer height from the center of the stem, and （2）extracting tree height data using the local maximum filtering （LMF） method. The results of method （1） and （2） showed no correlation in the height among the investigated trees, where the improvement of accuracy at a single tree level was expected by removing the noise above the tree crown and that corresponding to bent stems. On the other hand,no significant difference in mean height was found among the investigated trees by using method （2）. Therefore,there is a possibility that method （2） is effective for estimating mean tree height.