测绘通报 ›› 2026, Vol. 0 ›› Issue (1): 140-143.doi: 10.13474/j.cnki.11-2246.2026.0122

• 技术交流 • 上一篇    下一篇

潮位信息辅助下基于SAR影像的海岛海岸线提取

刘连胜1,2, 李晶晶3,4,5, 卢江涛3,4,5, 廖洁麟6, 王长委3,4,5, 岳文1,2   

  1. 1. 广东省土地调查规划院, 广东 广州 510075;
    2. 自然资源部陆表系统与人地关系重点实验室, 广东 广州 510075;
    3. 华南农业大学资源环境学院, 广东 广州 510642;
    4. 广东省农业资源利用重点实验室, 广东 广州 510642;
    5. 广东省土地信息工程技术中心, 广东 广州 510642;
    6. 山西迪奥普科技有限公司, 山西 太原 030600
  • 收稿日期:2025-05-12 发布日期:2026-02-03
  • 通讯作者: 岳文。E-mail:12639192@qq.com
  • 作者简介:刘连胜(1970—),男,硕士,高级工程师,研究方向为地籍调查、不动产登记、海洋调查。E-mail:369531024@qq.com
  • 基金资助:
    国家自然科学基金(42471340)

Tidal data-aided SAR image-based coastline extraction for islands

LIU Liansheng1,2, LI Jingjing3,4,5, LU Jiangtao3,4,5, LIAO Jielin6, WANG Changwei3,4,5, YUE Wen1,2   

  1. 1. Guangdong Provincial Institute of Land Surveying & Planning, Guangzhou 510075, China;
    2. Key Laboratory of Earth Surface System and Human-Earth Relationships of the Ministry of Natural Resources, Guangzhou 510075, China;
    3. College of Natural Resources and Environment South China Agricultural University, Guangzhou 510642, China;
    4. Guangdong Province Key Laboratory for Agricultural Resources Utilization, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;
    5. Guangdong Engineering Technology Research Center of Land Information, Guangzhou 510642, China;
    6. Shanxi Develop Technology Co., Ltd., Taiyuan 030600, China
  • Received:2025-05-12 Published:2026-02-03

摘要: 海岛海岸线是海岛变迁机理分析的基准,准确提取海岛海岸线已成为海岛研究领域亟待攻克的核心难题。本文以南澳岛为研究区域,基于潮汐站逐时水位观测数据与Sentinel-1A 合成孔径雷达(SAR)卫星过境时间的时空匹配,筛选出2023年9月—2024年4月4景高潮位时段的SAR影像,采用主动轮廓模型(CV模型)提取不同高潮位的瞬时水边线,通过欧几里得距离度量法生成平均海岸线。将该平均海岸线与最新的广东省政府2022年批复海岸线数据进行对比,提取精度为16.28 m。研究表明,潮位信息辅助的基于SAR影像的海岛海岸线提取方法,可有效避免传统单期影像潮位校正误差,为多云多雨海岛环境下的海岛海岸线提取和动态监测提供了新的解决方案,对提升海岛高质量管理水平具有重要应用价值。

关键词: 海岛海岸线, 合成孔径雷达, 潮位信息, 提取

Abstract: The coastline of an island serves as the baseline for analyzing the mechanisms of island evolution.Accurately extracting island coastlines has become a critical challenge urgently needing to be addressed in island research.This study focuses on Nan'ao Island as the research area.By spatio-temporally matching hourly tidal station water level observation data with Sentinel-1A synthetic aperture radar (SAR) satellite overpass times,four SAR images captured during high-tide periods from September 2023 to August 2024 were selected.An active contour model (Chan-Vese,CV model) was employed to extract instantaneous waterlines under different high-tide conditions,and a mean coastline was generated using the Euclidean distance metric method.Comparative analysis between this mean coastline and the latest government-approved coastline data of Guangdong province (2022) revealed an extraction accuracy of 16.28 m.The research demonstrates that the SAR image-based island coastline extraction method assisted by tidal information can effectively mitigate errors caused by traditional single-period image tidal corrections.This approach provides a novel solution for coastline extraction and dynamic monitoring in cloudy and rainy island environments,offering significant application value for enhancing refined island management capabilities.

Key words: island coastlines, SAR images, tidal information, extracting

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