“Double Evaluation”-the prerequisite and foundation of the municipal-level land and space master planXiangyanan, gaohuanggen, xiataiyun, wanglimeng, lizongyi, wangju, liaojingqian and luojingruE3S Web Conf., 233 (2021) 03021DOI: https://doi.org/10.1051/e3sconf/202123303021