[1] School of Remote Sensing and Information Engineering, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
[2] Xi'an Research Institute of Surveying and Mapping, 1 Middle Yanta Road, Xi'an 710054, China
[3] State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, 129 Luoyu Road, Wuhan 430079, China
[4] Chinese Academy of Surveying and Mapping, 28 West Lianhuachi Road, Haidian District, Beijing 100089, China