Acta Geodaetica et Cartographica Sinica ›› 2021, Vol. 50 ›› Issue (2): 203-214.doi: 10.11947/j.AGCS.2020.20200194

• Photogrammetry and Remote Sensing • Previous Articles     Next Articles

A ring detection method for levee features extraction based on airborne LiDAR data

SHEN Dingtao1,3, QIAN Tianlu2, XIA Yu1,3, CHEN Beiqing1,3, ZHANG Yu1,3, WANG Jiechen2   

  1. 1. Hubei Provincial Key Laboratory of River Basin Water Resources and Eco-environmental Sciences, Changjiang River Scientific Research Institute, Wuhan 430010, China;
    2. Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources, School of Geography and Ocean Science, Nanjing University, Nanjing 210023, China;
    3. Spatial Information Technology Application Research Department, Changjiang River Scientific Research Institute, Wuhan 430010, China
  • Received:2020-05-18 Revised:2020-09-29 Published:2021-03-03
  • Supported by:
    The National Key Research and Development Program of China (No. 2017YFC1502601);The National Natural Science Foundation of China (Nos. 42077438;41501558)

Abstract: Extracting levee features (e.g. central lines, levee crowns, levee slopes and sections) has great significance for detecting demaged levees and security assessment. Airborne LiDAR can be utilized to produce continuous surface data DTM.Thus, it has its advantage of lighter workload and higher precision when extracting levee features. In this paper, it is proposed a method to extract levee features with airborne LiDAR-derived DTM. Firstly, central line of levees is generated by ring detection. Compared to conventional methods, ring detection is tolerant to deformated or broken central lines caued by levee erosion or collapsion. Secondly, on this basis, levee crown and slope data is producted according to the standard of levee slope classification. Lastly, equidistant section lines of levees are extracted from ring intersections, and automatically generated the levee section. An empirical research of our method was conducted on 120 km of levees in Gongshuangcha detention basin in the Dongting Lake area, China.This method performed well in accurate extraction of levee engineering information, and has great application potential.

Key words: airborne LiDAR, levee, features, levee detection, DTM

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