Shao, Bo
Ding, Qun
Wu, Xianbing
Funding for this research was provided by:
State Key Laboratory of Geo-Information Engineering (SKLGIE2018-Z-2-2)
Article History
Received: 30 September 2019
Accepted: 20 February 2020
First Online: 30 March 2020
Competing interests
: The authors declare that they have no competing interests.