基于机载激光点云的输电线路平断面及植被包络线自动提取方法  

Automatic extraction of transmission line flat sections and vegetation envelopes based on airborne laser point clouds

作　　者：祖为国 谭金石 ZU Weiguo;TAN Jinshi(College of Surveying,Mapping and Remote Sensing Information,Guangdong Polytechnic of Industry and Commerce,Guangzhou 510510,China)

机构地区：[1]广东工贸职业技术学院测绘遥感信息学院,广东广州510510

出　　处：《测绘通报》2024年第11期27-32,共6页Bulletin of Surveying and Mapping

基　　金：中国高校产学研创新基金-无人集群协同智能项目(2021ZYB03002);中国高校产学研创新基金-曜程数字教育项目(2023YC009);广东省普通高校工程技术研究(开发)中心“无人机创新应用工程技术研究中心”(2024GCZX026)。

摘　　要：输电线路平断面图是输电线路路径优化、减少环境破坏、降低成本的重要成果依据。传统平断面测绘方法工作量大、危险性高,概略估测植被高的精度低,平断面很少的植被包络线直接影响线路设计。为此,本文提出一种基于机载激光点云的输电线路平断面与植被包络线自动提取绘制方法。首先阐述了总体技术路线;然后对激光点云的解算及DSM构建、滤波、自适应间隔的平断面自动提取、植被包络线简化算法等关键技术进行深入研究;最后通过实际案例,对激光点云构建DSM和DEM,且提取平断面对植被包络线等技术进行精度评估和效率分析。结果表明,激光点云具有较高的测量精度,能实现快速、准确、自动化提取平断面,自动绘制植被包络线,为输电线路路径优化提供重要的技术支持,值得全面推广应用。The flat cross-section map of transmission lines is a crucial basis for optimizing transmission line routes,reducing environmental impact,and lowering costs.Traditional methods for mapping flat cross-sections involve considerable labor and high risk,with low accuracy in estimating vegetation height and rare direct vegetation envelope lines to affect line design.To address this,a method for automatically extracting and drawing flat cross-sections and vegetation envelope lines of transmission lines based on airborne laser point clouds is proposed.The overall technical approach are described firstly.Then,key technologies are investigated in depth,including laser point cloud calculation and DSM construction,filtering and DEM construction,automatic extraction of flat cross-sections with adaptive intervals,and vegetation envelope line simplification algorithms.Finally,through practical cases,the DSM and DEM construction from laser point clouds,extraction of flat cross-sections and vegetation envelope lines,and their accuracy and efficiency are analyzed.Results show that laser point clouds provide high measurement accuracy,enabling fast,accurate,and automated extraction of flat cross-sections and automatic drawing of vegetation envelope lines,So offer significant technical support for optimizing transmission line routes and being worthy of widespread promotion and application.

关 键 词：无人机 激光雷达 输电线路平断面 植被包络线 点云滤波 DSM 

分 类 号：P237[天文地球—摄影测量与遥感]