GISを用いた都市周辺の急傾斜危険箇所の新しい抽出方法(<小特集テーマ>都市における地盤工学的問題: 都市の防災と環境)

概要

論文の詳細を見る
Dangerous slope identification is very important for the slope failure disaster prevention especially around urban area. In the past identifications have been performed by man-power processing on the terrain map and have many problems, like preciseness, mistake etc. In this research, a new GIS-based dangerous slope identification method is proposed. By using GIS and laser-scan terrain data, slope angle raster map is created and re-classificated as a raster map with the two kinds of cell value : 1 (slope angle is great than 30 degree) or 0 (slope angle is small than 30 degree). By converting the raster data into vector data, the polygon map with slope angle greater than 30 degree can be obtained. Finally using Arcobjects and visual basic language, a program is made and can identify dangerous slope and its influence area with very high efficiency and preciseness.
社団法人地盤工学会の論文
2005-09-01