1. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, China
2. College of Computer Science and Engineering, Northwest Normal University, Lanzhou, China
3. State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan University, Wuhan, China
4. Eastern Institute for Advanced Study (EIAS)/Eastern Institute of Technology (EIT), Ningbo, China