Mining Ground Surface Information Extraction and Topographic Analysis Using UAV Video DataYin Yaqiu, Jiang Cunhao, Lv Jing, Wang Jie, Ju Xing, Wang Hao, Xing Yu and Zhang LushouE3S Web Conf., 194 (2020) 05030DOI: https://doi.org/10.1051/e3sconf/202019405030