Sustainable Use of Land Resources and Dynamic Regulation of “3S”System

The sustainable use of land resources is the prerequisite of coordination development among population,environment and social economics;The People's Republic of China must formulate correspondingly the sustainable development strategies of land use according to Chinese situation;The subject,channel and assessment target system of sustainable land resources use may be different among different countries,regions and sciences,but all affective factors in population,resources,environment and development must be considered;“3S” system is the integrated system of RS,GIS and GPS,which has the function of dynamic monitoring and synthetic analysis in sustainable land use and will become new technological means of sustainable land use and management in the 21st century.