Application of spatial information technology to landslides Landslide vulnerability mapping using GIS and spatial statistical analysis

概要

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Landslide related GIS data set for the whole Toyama-prefecture was integrated with DEM, geological maps, natural environment GIS data, landslide distribution maps and GIS software. Effective relief, anomaly of disperse of altitude, geology, distance from faults and fold axes, and vegetation indices were produced from the data set . Result of the weights of evidence analysis with landslide reserved area ratio as prior provability showed that the highest relationship with landslide area was the anomaly of disperse of altitude, the second highest were geology and vegetation and the third were effective relief and distance from faults and fold axes. Accuracy of these score maps made from the analysis were checked with ROC curves and landslide evaluation maps were produced when false positive rate is 0.2. It was thought that, digitally produced maps of this study can beused to complement analogously produced existing landslide hazard maps.
公益社団法人日本地すべり学会の論文