[1]College of Environmental and Resource Sciences;
Zhejiang University;
Hangzhou 310058;
P.R.China;
[2]Institute of Agricultural Resources and Regional Planning;
Chinese Academy of Agricultural Sciences;
Beijing 100081;
P.R.China;
[1]College of Environmental and Resource Sciences;
Zhejiang University;
Hangzhou 310058;
P.R.China;
DSM; Digital mapping; environment;