水文・農業分野における高分解能マルチスペクトル衛星画像の利用について

概要

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This paper examines the applicability of high-resolution multispectral satellite imagery in hydrological and agricultural areas. The applicability was investigated via three QuickBird multispectral images of Osaka, which were acquired during summer and winter 2005-2006. In a supervised classification, shadows of ground obstacles were occasionally misclassified as surface water. This problem could be avoided using summer images and a filter. Vegetations were easily separated from non-vegetation, but separation of agricultural crops from forests was somewhat difficult. NDVI from QuickBird image well described the vegetation conditions in small plot-size fields in Japan. Thus, high-resolution NDVI should be a valuable source for agricultural land and water managements. A sensitivity analysis indicated that atmospheric correction is recommended if absolute value of NDVI is important, although atmospherically uncorrected NDVI is sufficient for relative analysis within a single image.
日本雨水資源化システム学会の論文