Abstract: Based on the MODIS and AVHRR data,the vegetation cover and its characteristics from different data sources in the North Huai River Plain and Dabieshan mountain areas of Anhui Province were compared.Results showed that the MODIS data was highly related to the AVHRR data under the same vegetation cover type.The relativity of NDVI data between with the MODIS and AVHRR was higher under the resolution of 4km×4km than that under the resolution of 1km×1km.The annual change of the monthly MODIS NDVI values was consistent with that of the AVHRR NDVI values,as the vegetation cover type was same,while it was different as the vegetation cover type was not same.In the typical dryland and paddy rice field,the NDVI curve was in a two apex form because of crop rotation,while in the mountain,fruit forest,and city and town areas,it showed a single apex form.The seriation of the total vegetation index among the areas according to its magnitude could be the Dabieshan and the South mountain areas of Anhui Province,dryland and farmland,and city and town areas.

Key words: MODIS/AVHRR, MODIS/AVHRR, Vegetations index