Lei Xu^1,2, Nengcheng Chen Dr.^1,3, Hamid Moradkhani⁴ and Xiang Zhang Dr.¹, (1)Wuhan University, State Key Laboratory of Information Engineering in Surveying, Mapping, and Remote Sensing, Wuhan, China, (2)The University of Alabama, Department of Civil, Construction, and Environmental Engineering, Tuscaloosa, AL, United States, (3)Collaborative Innovation Center of Geospatial Technology, Wuhan, China, (4)The University of Alabama, Tuscaloosa, AL, United States