期刊
IFOREST-BIOGEOSCIENCES AND FORESTRY
卷 10, 期 -, 页码 451-458出版社
SISEF-SOC ITALIANA SELVICOLTURA ECOL FORESTALE
DOI: 10.3832/ifor2151-010
关键词
Mixed Forests; Quantitative Structure Models; Voxel-based; Xylometry
类别
资金
- Leuphana Graduate School DIABOLO - Distributed, Integrated and Harmonised Forest Information for Bioeconomy Outlooks
- European Union's Horizon research and innovation programme [633464]
Many analyses in ecology and forestry require wood volume estimates of trees. However, non-destructive measurements are not straightforward because trees are differing in their three-dimensional structures and shapes. In this paper we compared three methods (one voxel-based and two cylinder-based methods) for wood volume calculation of trees from point clouds obtained by terrestrial laser scanning. We analysed a total of 24 young trees, composed of four different species ranging between 1.79 m to 7.96 m in height, comparing the derived volume estimates from the point clouds with xylometric reference volumes for each tree. We found that both voxel- and cylinder-based approaches are able to compute wood volumes with an average accuracy above 90% when compared to reference volumes. The best results were achieved with the voxel- based method (r(2) = 0.98). Cylinder-model based methods (r(2) = 0.90 and 0.92 respectively) did perform slightly less well but offer valuable additional opportunities to analyse structural parameters for each tree. We found that the error of volume estimates from point clouds are strongly species-specific. Therefore, species-specific parameter sets for point-cloud based wood volume estimation methods are required for more robust estimates across a number of tree species.
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