Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China;
Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China;
Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China;
Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China;
environmental monitoring; GIS; information system; Intemet; Web GIS; Yili Prefecture;