Abstract:From 1995 to 2000, field data collections using Remote Sensing(RS) and Geographic Information System (GIS) have been conducted in 12 provinces of China‘ western regions. The land usage and 6 types of vegetation coverage show an average accuracy of 92.92%. Dynamic patches of the land usages and vegetation coverage types of the western provinces are analyzed. A total of 138746 of dynamic patches are obtained; and contains all major vegetation coverage types. The average reliability reaches as high as 97.71% f...