This study aims to clarify the most suitable spatial scale to analyze landscape structure for evaluating ecological functions. For this purpose, 7 spatial scales, 0 to 5 order watersheds and the community boundary, were compared in their abilities to explain the variety of physical or visual functions in the Told river catchment. In the results, larger order scales, especially 4th order watersheds, clearly reflected seen beauty, contrary to smaller orders, 0 to 2 order watersheds and the community boundary, which associated with physical functions, such as soil erosion or land slide protection. Units in larger order scales could be made from smaller scale units, especially the community boundary which could also analyze the activities of rural people. From these results, it was suggested that the community boundary was the most suitable scale to analyze landscape structure.
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