[Zhang, Tianhao; Zhu, Zhongmin; Gong, Wei] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Peoples R China.
[Zhu, Zhongmin] Wuchang Shouyi Univ, Coll Informat Sci & Engn, Wuhan 430064, Peoples R China.
[Gong, Wei] Collaborat Innovat Ctr Geospatial Technol, Wuhan 430079, Peoples R China.
[Xiang, Hao] Wuhan Univ, Sch Publ Hlth, 115 Donghu Rd, Wuhan 430071, Peoples R China.
[Li, Ying] Cent China Normal Univ, Sch Informat Management, Wuhan 430079, Peoples R China.