Geoinformatics in Sustainable Ecosystem and Society 7th International Conference, GSES 2019, and First International Conference, GeoAI 2019, Guangzhou, China, November 21–25, 2019, Revised Selected Papers - Xie, Yichun; Li, Yong; Yang, Ji; Xu, Jianhui; Deng, Yingbin (Springer Singapore, 2020)