Multi-scale Photovoltaic (PV) irradiance estimate in the Tokyo Metropolis are obtained through Fu (2002) radiation model by incorporating detailed digital elevation model (10m DEM) and building elevation information superimposed simultaneously. The obtained estimate which contains the dual irradiance effects of both geographic (wide-scale elevation variation in 50 to 100km in space) and buildings (narrow-scale variation in 5 to 10m in space) are evaluated simultaneously. Districts in Tokyo Metropolis ie; entire Metropolis including Tama area, the 23 Special-ward area, Shinjyuku west exit skyscrapers are presented for validation, and are consistent with diurnal radiation pattern physically interpretable. Estimates are also validated and tested for the simple meteorological condition (clear sky was assumed) with ground surface data and their reproduction confirmed.
