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Estimation of Pinus massoniana Leaf Area Using Terrestrial Laser Scanning

College of Forestry, Fujian Agriculture and Forestry University, Fujian 350002, China
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Forests 2019, 10(8), 660; https://doi.org/10.3390/f10080660
Received: 11 June 2019 / Revised: 1 August 2019 / Accepted: 1 August 2019 / Published: 6 August 2019
(This article belongs to the Special Issue Remote Sensing Technology Applications in Forestry and REDD+)
The accurate estimation of leaf area is of great importance for the acquisition of information on the forest canopy structure. Currently, direct harvesting is used to obtain leaf area; however, it is difficult to quickly and effectively extract the leaf area of a forest. Although remote sensing technology can obtain leaf area by using a wide range of leaf area estimates, such technology cannot accurately estimate leaf area at small spatial scales. The purpose of this study is to examine the use of terrestrial laser scanning data to achieve a fast, accurate, and non-destructive estimation of individual tree leaf area. We use terrestrial laser scanning data to obtain 3D point cloud data for individual tree canopies of Pinus massoniana. Using voxel conversion, we develop a model for the number of voxels and canopy leaf area and then apply it to the 3D data. The results show significant positive correlations between reference leaf area and mass (R2 = 0.8603; p < 0.01). Our findings demonstrate that using terrestrial laser point cloud data with a layer thickness of 0.1 m and voxel size of 0.05 m can effectively improve leaf area estimations. We verify the suitability of the voxel-based method for estimating the leaf area of P. massoniana and confirmed the effectiveness of this non-destructive method. View Full-Text
Keywords: Pinus massoniana; specific leaf area; leaf area; terrestrial laser scanning; voxelization; forest canopy Pinus massoniana; specific leaf area; leaf area; terrestrial laser scanning; voxelization; forest canopy
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MDPI and ACS Style

Deng, Y.; Yu, K.; Yao, X.; Xie, Q.; Hsieh, Y.; Liu, J. Estimation of Pinus massoniana Leaf Area Using Terrestrial Laser Scanning. Forests 2019, 10, 660.

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