Fault geomorphology on the fluvial plains interpreted by the stereoscopic images produced from digital elevation model

Abstract

We have stored detailed digital elevation model (DEM) data published by Geospatial Information Authority of Japan (GSI) since the Basic Act on Promotion of Utilization of Geographical Information was started in 2007. We produced stereoscopic images from all files of 5-m-mesh DEM and 10-m-mesh DEM of GSI, and interpreted them on GIS systems. As a result, smaller fault scarps and fault-related broad deformations were newly identified in numerous sites. We report several examples of them, which indicates that stereoscopic images from detailed DEM should be systematically applied to active fault research, in addition to advantages of DEM-based stereoscopic images.