Disaster Back-up Support using GIS Contents Composed of Images from Satellite and UAV

This manuscript describes a volunteer activity of reconstruction assistance for Great East Japan Earthquake. Concretely, the authors make sand erosion control contents, composed of 3D information from Geospatial Information Authority of Japan, and a combination between wide-area satellite images and a high-resolution mosaic image generated from a movie shot on UAV, i.e., Unmanned Aerial Vehicle, flying in a low-altitude-sky. In addition, we discuss and consider usability of the contents taking into account comments and advices from specialists of geology.