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当前位置: 首页 > 文章 > 基于地基激光雷达构建人工林树高模型的研究 森林工程 2022,38 (1) 93-100
Position: Home > Articles > Study on Tree Height Model Construction of Plantation Based on Data Derived from Terrestrial Laser Scanning Forest Engineering 2022,38 (1) 93-100

基于地基激光雷达构建人工林树高模型的研究

作  者：
姚相坤;苍甜甜;张一帆;许延丽
单  位：
黑龙江科技大学矿业工程学院;中船(浙江)海洋科技有限公司
关键词：
地基激光雷达;人工林;单木因子;树高模型;水曲柳;兴安落叶松
摘  要：
为探索地基激光雷达技术提取人工林单木因子、构建树高模型的可靠性,本文采用地基激光雷达技术对水曲柳(Fraxinus mandshurica)和兴安落叶松(Larix gmelinii)2种人工林样地进行多站全方位扫描,对获取的点云数据进行预处理、点云归一化和单木分割,再批量提取单木因子树高和胸径,最后基于点云数据提取的单木因子,分别对备选的8个树高模型进行拟合,并用实测数据进行检验,得出模型精度评价结果。结果显示:(1)针对本文所选的2块人工林样地,地基激光雷达点云数据对单木的识别率达到了100%;(2)水曲柳和兴安落叶松胸径提取结果决定系数(R~2)均在0.92以上,树高的R~2均在0.90以上;(3)基于点云提取的树高和胸径构建的水曲柳的最优树高模型为Schumacher模型,拟合结果调整绝对系数(R■)为0.826 1,兴安落叶松的最优树高模型为Logistic模型,拟合结果R■为0.801 1,2个树种最优树高模型拟合与检验结果基本一致。从而得出,地基激光雷达技术对人工林样地单木识别率很高,单木因子提取精度较好,基于提取的单木因子所构建树高模型,在林业调查中有较高的科研价值和应用前景。
译  名：
Study on Tree Height Model Construction of Plantation Based on Data Derived from Terrestrial Laser Scanning
作  者：
YAO Xiangkun;CANG Tiantian;ZHANG Yifan;XU Yanli;College of Mining Engineering, Heilongjiang University of Science and Technology;CSSC (Zhejiang) Ocean Technology Co., Ltd;
关键词：
Terrestrial laser scanning;;plantation;;individual tree factor;;tree height model;;Fraxinus mandshurica;;Larix gmelinii
摘  要：
In order to explore the reliability of terrestrial laser scanning technology to extract individual tree factors and build tree height models, terrestrial laser scanning was used to conduct multi-station all-dimensional scaning for Fraxinus mandshurica and Larix gmelinii plantations. After preprocessing the acquired point cloud data with methods of data normalization and individual tree segmentation, the tree height and DBH(Diameter at Breast Height) of individual tree factors were extracted in batches. Finally, based on the individual tree factor extracted from the point cloud data, eight alternative tree height modes were fitted respectively and tested with measured data to obtain the model accuracy evaluation results. The results showed that:(1) For the two plantation plots selected in this paper, the point cloud data obtained by terrestrial laser scanning had a recognition rate of 100% for individual tree.(2) The determination coefficients(R~2) of the DBH extracted results of Fraxinus mandshurica and Larix gmelinii were more than 0.92, and the R~2 of tree height extracted results were more than 0.90.(3) The optimal tree height fitting model of Fraxinus mandshurica based on tree height and DBH extracted from point cloud was the Schumacher model, and the adjusted determination coefficient R■ of the fitting model was 0.826 1. The optimal tree height model of Larix gmelinii was the Logistic model, and the R■ of the fitting model was 0.801 1. The optimal tree height model fitting results of the two tree species were basically consistent with the test results. It was concluded that terrestrial laser scanning technology had a high recognition rate for individual trees in plantation, and the accuracy of individual tree factor extraction was high. The tree height model constructed based on the extracted individual tree factor had high scientific research value and application prospects in forestry investigation.

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