1. School of Geography and Tourism Shaanxi Key Laboratory of Tourism Informatics Shaanxi Normal University Xi'an China
2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing Wuhan University Wuhan China
3. Department of Land Surveying and Geo‐Informatics The Hong Kong Polytechnic University Kowloon Hong Kong
4. Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China
5. National & Local Joint Engineering Research Center of Geo‐spatial Information Technology Fuzhou University Fuzhou China