1. Shaanxi University of Technology,School of Civil Engineering and Architecture,Hanzhong,China,723000
2. Chinese Academy of Sciences,State Key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research,Beijing,China,100101
3. University of Chinese Academy of Sciences,Beijing,China,100049
4. Chinese Academy of Agricultural Sciences,State Key Laboratory of Efficient Utilization of Arid and Semi-Arid Arable Land in Northern China, Institute of Agricultural Resources and Regional Planning,Beijing,China,100081
5. Bureau of Housing & Urban-Rural Development and Management,China,724100