The occurrence of natural disaster is influenced by not only geomorphologic, geologic and groundwater conditions but also vegetation and artificial civil working. These conditions are evaluated qualitatively based on aerial photography analyses and field surveys. The method of quantitative evaluation of natural slope stability is investigated using digital elevation models (DEMs) and high-resolution satellite imagery. In the homogeneous geologic condition area, the DEMs can detect the geomorphologic feature involved in natural disaster, and the satellite imagery can evaluate the vegetations. Therefore, we consider that the natural slope stability can be estimated by the combination of geomorphologic attribute calculated from DEMs and vegetation indices obtained from satellite imagery.

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