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Assessment of the vegetation activity is essential to assess ecological environment. It is characterized by Net Primary Productivity (NPP). The relationship between NPP and the time integral of Normalized Difference Vegetaion Index (iNDVI) is studied. At first, land use is classified into some categories from Digital National Land Information. The value of NPP is compared with iNDVI derived from NOAA-AVHRR at each land use. Appling this method, distribution of NPP is derived in the eastern Japan.doi:10.2208/prohe.38.771 fatcat:kl2rn5n6o5ajnlfg2bxpmyhse4