The comprehensive and ordered scheme of grassland classification in Tianzhu based on ArcGIS

Based on data obtained from the annual precipitation and temperature at Tianzhu County during past 30 years from 1961 to 1990, the IDW, Spline, Kriging and Natural Neighbor methods in ArcGIS software package were used for generating spatial interpolation and overlay analysis of the classification indices of annual accumulated temperature 0℃（） and humidity （K） in accordance with the standard of the comprehensive and ordered scheme of grassland classification (COSGC），respectively. Nine distribution images of grassland types at Tianzhu were regenerated. The results of this study indicated that the comprehensive and ordered scheme of grassland classification images generated by using the interpolated by Natural Neighbor and K by Kriging methods were more similar with the real situation at Tianzhu based on comparison of the vegetation landscape types between the comprehensive and ordered scheme of grassland classification images and the remote sensing vegetation classification images.