Impervious surface is a major indicator of rapid urbanization, which leads to urban waterlogging. In this study, the authors took the advantages of multi-spectral satellite imagery and LiDAR data based on Grabcut to extract impervious surfaces. Taking the Guangzhou City as a study case, the authors reveal that the method can reach higher overall accuracy and robustness than the traditional single-source method.
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2018, Vol. 30 
