Funding for this research was provided by:
Young Scientists Fund (61601418)
Opening Foundation of Hunan Engineering and Research Center of Natural Resource Investigation and Monitoring (2020-5)
Qilian Mountain National Park Research Center (GKQ2019-01)
Geomatics Technology and Application Key Laboratory of Qinghai Province (QHDX-2019-01)
Article History
Received: 8 August 2019
Accepted: 10 February 2020
First Online: 21 February 2020