Haoming Xia, College of Environment and Planning, Ministry of Education Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions, Henan Collaborative Innovation Center of Urban-Rural Coordinated Development, Henan University, Kaifeng, China, Gary Feng, USDA-ARS, Genetics and Sustainable Agricultural Research Unit, Starkville, United States, Jie Wang, University of Oklahoma Norman Campus, Department of Microbiology and Plant Biology, Center for Spatial Analysis, Norman, OK, United States, Yang Hu, Beijing Forestry University, College of Forestry, Beijing, China and Yaochen Qin, College of Environment and Planning, Key Laboratory of Geospatial Technology for Middle and Lower Yellow River Regions, Henan Collaborative Innovation Center of Urban-Rural Coordinated Development, Henan University, Kaifeng, China