摘要
针对河湖及水利工程划界工作中受测区植被密集分布影响,单独利用机载激光雷达点云数据自动滤波分类时,低矮植被点易被错分和误判为地面点,从而影响兴趣高程特征线精确提取的问题,结合正射影像光谱信息丰富、地面分辨率高的特点,提出一种融合点云与正射影像的管理与保护范围线准确提取方法。通过南湾水库工程应用,结果表明该方法用于河长制管理与保护范围线提取切实可行,可极大缩短生产周期、节约生产成本,具有良好的实用推广价值。
In the demarcation of rivers,lakes and water conservancy projects,when the airborne lidar point cloud data is used alone to automatically filter and classify,low vegetation points are easily misclassified and misjudged as ground points,affected by the dense distribution of vegetation in the measured area,thus resulting in the failture of accurately extracting interest elevation feature lines.Combining the characteristics of rich spectral information and high ground resolution of orthophotos,this paper proposes a method of accurate extraction of management and protection range lines fusing point cloud and orthophotos,and applies it to the Nanwan Reservoir project.The results show that the method is feasible for river chiefssystem management and protection range line extraction,which can greatly shorten the production cycle and save production costs,so it is of good practical promotion value.
作者
夏祖伟
荣利会
XIA Zuwei;RONG Lihui(Henan Water Conservancy Survey,Ltd.,Zhengzhou 450003,China)
出处
《人民珠江》
2020年第10期109-114,共6页
Pearl River
关键词
机载激光雷达
点云滤波
正射影像
管理与保护范围线提取
airborne lidar
point cloud filtering
orthophoto
management and protection range line extraction
