Remote Sensing Method for Extracting Topographic Information on Tidal Flats Using Spatial Distribution Features

IF 2 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Marine Geodesy Pub Date : 2021-06-04 DOI:10.1080/01490419.2021.1925791

Y. Lijun, Xiao Yao, Jiang Jie, Yixiang Chen, Gu Yan, Sentong Zhang

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引用次数: 1

Abstract

Abstract A remote sensing method combining remote sensing and ground surveying is proposed to extract tidal flat topographic information via the spatial distribution characteristics of tidal flat surface features. Based on the eastern Chongming beach of the Yangtze Estuary and Landsat-5 satellite images, this study identifies the spatial distribution characteristics of tidal flat features using field-based RTK data and spectral data. The remote sensing method for extracting the geometric and physical characteristics of linear and surface geographical elements on tidal flats and the elevation assignment method are discussed. The effectiveness of this method is verified by the quality of the resultant tidal flat DEM. The results show that the use of spatial distribution features in remote sensing images can provide rich topographic information. The DEM results have an accuracy of 0.16 m, are in line with the basic topographic patterns of tidal flats, and can describe local microscale geomorphic features. This technique solves the problem of a single topographic information source in current remote sensing measurement methods and provides technical support for detecting dynamic changes in coastal zones by using remote sensing technology.

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利用空间分布特征提取滩涂地形信息的遥感方法

摘要提出了一种遥感与地面测量相结合的遥感方法，利用潮滩地表特征的空间分布特征提取潮滩地形信息。以长江口崇明东滩为研究对象，结合Landsat-5卫星影像，利用野外RTK数据和光谱数据识别了长江口崇明东滩潮滩特征的空间分布特征。讨论了遥感提取潮滩线性和地表地理要素几何和物理特征的方法以及高程配值方法。所得潮滩DEM的质量验证了该方法的有效性。结果表明，利用遥感影像的空间分布特征可以提供丰富的地形信息。DEM结果精度为0.16 m，符合潮滩基本地形格局，能较好地描述局部微尺度地貌特征。该技术解决了当前遥感测量方法中地形信息源单一的问题，为利用遥感技术探测海岸带动态变化提供了技术支持。

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来源期刊

Marine Geodesy 地学-地球化学与地球物理

CiteScore

4.10

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The aim of Marine Geodesy is to stimulate progress in ocean surveys, mapping, and remote sensing by promoting problem-oriented research in the marine and coastal environment. The journal will consider articles on the following topics: topography and mapping; satellite altimetry; bathymetry; positioning; precise navigation; boundary demarcation and determination; tsunamis; plate/tectonics; geoid determination; hydrographic and oceanographic observations; acoustics and space instrumentation; ground truth; system calibration and validation; geographic information systems.

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