Terrain extraction method of Poyang Lake based on remote sensing image

doi:10.13474/j.cnki.11-2246.2022.0142

Abstract

Abstract: The inversion of lake bottom topography using remote sensing images has the advantages of simple operation and short processing period. Taking Poyang Lake as the research object, this paper proposes a method of lake bottom terrain inversion based on Kriging method. By analyzing the correlation between the spatial position and water level of eight water level stations around Poyang Lake, the change trend of lake boundary water level is obtained. The Kriging method is used to retrieve the water level of Lake boundary points, and the water level of boundary points is used as elevation points for lake bottom terrain inversion and the shape data verifies the reliability of the inversion method. The results show that the standard average error of cross validation is less than 0.2 m, and the average absolute error of terrain inversion is less than 1 m, which indicates that this method can be used for lake bottom terrain inversion with high accuracy.

Key words: lake bottom topography, water level, remote sensing image, water level inversion, Poyang Lake

CLC Number:

P237

ZHANG Gongquan, YUE Jianping, LIU Shengnan, WANG Hailong, YANG Zhixiang, ZHOU Hangyu. Terrain extraction method of Poyang Lake based on remote sensing image[J]. Bulletin of Surveying and Mapping, 2022, 0(5): 62-66,73.

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