An impervious surface index construction for restraining bare land
CAO Yong1(), TAO Yuxiang1(), DENG Lu1, LUO Xiaobo1,2
1. School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065,China 2. Chongqing Institute of Meteorological Sciences, Chongqing 401147, China
At present, the method of extracting the impervious surface area based on the impervious surface area according to the impervious surface spectral index has been widely used because of its concision and speed. However, the method of extracting impervious surface by spectral index has the disadvantage that bare land and impervious surface are easily confused. To tackle this problem, the authors created impervious surface and bareness area index (ISBAI) according to the spectral feature difference of impervious surface, bare land and water body as well as vegetation in the 4, 5 and 6 bands of Landsat8 OLI images. Based on ISBAI and bareness area index (BAI), the authors built a new type of impervious surface index, called the bareness - restrained impervious surface index (BRISI). Improved double-window flexible pace search (IDFPS) method was used to determine the optimal threshold, and impervious surface extraction was performed. Chongqing (a mountain city) and Xi’an (a plain city) were selected as the research area to evaluate the accuracy of BRISI extraction in comparison with other commonly used impervious surface indices. The experimental results show that the extraction accuracy of BRISI in the experimental area of Chongqing and Xi’an experimental area reach 86.8% and 86.8% respectively, in comparison with the accuracy of all other indices that took part in the contrast, BRISI extraction accuracy is the highest. Meanwhile, BRISI also eliminates the influence of bare land in the construction area extraction, and overcomes the problem that it is difficult for other impervious surface indices to distinguish bare land from impervious surface.
曹勇, 陶于祥, 邓陆, 罗小波. 一种抑制裸地的不透水面指数构建[J]. 国土资源遥感, 2020, 32(3): 71-79.
CAO Yong, TAO Yuxiang, DENG Lu, LUO Xiaobo. An impervious surface index construction for restraining bare land. Remote Sensing for Land & Resources, 2020, 32(3): 71-79.
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2020, Vol. 32 
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