高分解能衛星画像と数値標高モデルを用いた広域での地形・地盤分類メッシュマップの細密化

抄録

For detailed seismic hazard mapping, 50m-mesh engineering geomorphologic classification map is created using the existing 250m-mesh map, high-resolution satellite images (QuickBird) and digital elevation model (DEM) in the southern part of the Kanto area, Japan. Elevation, slope and relief are used to evaluate the topographical characteristics. The spatial spectral characteristic of the image computed by two-dimensional Fourier transformation is also used to evaluate texture of the image in lowlands. The rules for the detailed mapping are constructed based on the characteristics of these indices for each geomorphology. The result of the detailed mapping shows that the estimated 50m-mesh map almost agree with the manually classified mesh map.