基于光学遥感和激光雷达的高压输电在线走廊树冠高度信息提取与分析

IF 2.8 4区 地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS
Jinpeng Hao , Xiuguang Li , Hong Wu , Kai Yang , Yumeng Zeng , Yu Wang , Yuanjin Pan
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引用次数: 1

摘要

传统的检测方法无法快速准确地监测树木屏障,保障输电线路安全。针对这些问题,本研究提出了一种基于光学遥感和激光雷达的快速树冠高度信息提取方法,并利用无人机光学图像和激光雷达对宁夏地区某高校和某高压输电线路走廊的树木高度进行了监测。结果表明:利用无人机光学影像提取树高的相对误差小于5%,最低相对误差为0.11%;光学图像树高提取结果与实测树高的决定系数R2为0.97,两者具有较高的相关性。在树障监测领域,利用机载LiDAR点云提取的树高确定系数R2和测量树高的冠层高度模型(CHM)确定系数R2分别为0.947和0.931。点云提取树高的最大和最小相对误差分别为2.91%和0.2%,提取精度在95%以上。实验结果表明,利用无人机光学遥感和激光雷达快速准确地监测树木屏障和提取树木高度信息是可行的,这对传输线廊道树木屏障的风险评估和预警具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Extraction and analysis of tree canopy height information in high-voltage transmission-line corridors by using integrated optical remote sensing and LiDAR

Traditional inspection methods cannot quickly and accurately monitor tree barriers and safeguard the transmission lines. To solve these problems, in this study, we proposed a rapid canopy height information extraction method using optical remote sensing and LiDAR, and used UAV optical imagery with LiDAR to monitor the height of trees in a university and a high-voltage transmission line corridor in the Ningxia region. The results showed that the relative error of tree height extraction using UAV optical images was less than 5%, and the lowest relative error was 0.11%. The determination coefficient R2 between the optical image tree height extraction results and the measured tree height was 0.97, thus indicating a high correlation for both. In the field of tree barrier monitoring, the determination coefficient R2 of tree height extracted using airborne LiDAR point cloud, and canopy height model (CHM) and of the measured tree height were 0.947 and 0.931, respectively. The maximum and minimum relative error in tree height extraction performed using point cloud was 2.91% and 0.2%, respectively, with an extraction accuracy of over 95%. The experimental results demonstrated that it is feasible to use UAV optical remote sensing and LiDAR in monitoring tree barriers and tree height information extraction quickly and accurately, which is of great significance for the risk assessment and early warning of tree barriers in transmission-line corridors.

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来源期刊
Geodesy and Geodynamics
Geodesy and Geodynamics GEOCHEMISTRY & GEOPHYSICS-
CiteScore
4.40
自引率
4.20%
发文量
566
审稿时长
69 days
期刊介绍: Geodesy and Geodynamics launched in October, 2010, and is a bimonthly publication. It is sponsored jointly by Institute of Seismology, China Earthquake Administration, Science Press, and another six agencies. It is an international journal with a Chinese heart. Geodesy and Geodynamics is committed to the publication of quality scientific papers in English in the fields of geodesy and geodynamics from authors around the world. Its aim is to promote a combination between Geodesy and Geodynamics, deepen the application of Geodesy in the field of Geoscience and quicken worldwide fellows'' understanding on scientific research activity in China. It mainly publishes newest research achievements in the field of Geodesy, Geodynamics, Science of Disaster and so on. Aims and Scope: new theories and methods of geodesy; new results of monitoring and studying crustal movement and deformation by using geodetic theories and methods; new ways and achievements in earthquake-prediction investigation by using geodetic theories and methods; new results of crustal movement and deformation studies by using other geologic, hydrological, and geophysical theories and methods; new results of satellite gravity measurements; new development and results of space-to-ground observation technology.
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