中南林业科技大学学报2025，Vol.45Issue(12)：36-46,11.DOI:10.14067/j.cnki.1673-923x.2025.12.004
湖南省栎类树种地基激光雷达立木材积模型
Terrestrial laser scanning volume modeling of Quercus species in Hunan Province,China
摘要
Abstract
[Objective]To carry out the research and application study of tree standing volume modeling based on non-destructive data collection by high-precision terrestrial laser scanning using Quercus species in Hunan Province as a pilot project.[Method]143 single trees of Quercus species were scanned by Terrestrial Laser Scanning,the parameters of the trees were extracted from point cloud data,the model that meets the biological characteristics was selected as an alternative,and the Marquardt iterative method and the weighted least squares method were used to fit the model,and the optimal timber standing volume model was selected based on the results of the model fitting,the evaluation of the model and the test of the applicability of the model.[Result]The R2 of the traditional one-dimensional and two-dimensional lumber models constructed using point cloud extraction parameters was greater than 0.9,the remaining standard deviation was less than 0.1,the total relative error and average systematic error were less than 3%,and the prediction accuracy was over 95%.The average percent standard error of the two-dimensional lumber model was less than 7%,and that of the one-dimensional lumber model was less than 16%.By analyzing the relationship between the volume of individual tree segments and the overall volume,it is proposed to construct a standing volume model by combining the diameter with the height at the position of 0.276 relative to the height of the tree,and the model constructed has the highest accuracy among all the standing volume models,with an R2 of 0.992 and a residual standard deviation of less than 0.03,which is superior to the traditional standing volume model,and enhances the accuracy of the standing volume prediction.And there was no significant difference between the estimated and measured wood volume of the wood standing volume model constructed using Terrestrial Laser Scanning point cloud data.[Conclusion]The forest parameters extracted from the point cloud data have high accuracy,and can replace the measured forest parameters for the related modeling;the accuracy of the constructed timber standing volume model can meet the needs of the daily forestry survey in Hunan Province,and provide a non-destructive technical means for the future modeling;the proposed new parameters can improve the accuracy of the timber standing volume modeling,and provide a new way of thinking for the construction of timber standing volume model.关键词
湖南省/栎类树种/地基激光雷达/立木材积模型/削度方程/单木参数提取Key words
Hunan Province/Quercus species/terrestrial laser scanning/standing volume model/taper equation/single-tree parameter extraction分类
农业科技引用本文复制引用
兰俊宇,唐杰,曹文昊,周晟,王金池,孙华..湖南省栎类树种地基激光雷达立木材积模型[J].中南林业科技大学学报,2025,45(12):36-46,11.基金项目
国家自然科学基金项目(32471861,31971578) （32471861,31971578）
湖南省科技创新计划(科技创新领军人才)项目(2023RC1065). （科技创新领军人才）
