DISASTER INFORMATION PROVIDING SYSTEM UTILIZING UBIQUITOUS SPATIAL INFORMATION PLATFORM TECHNOLOGY

摘要

In order to encounter earthquake disasters, the local governments have provided earthquake hazard maps to the citizens and have promoted seismic reinforcement for the buildings in Japan. It is difficult to gather post disaster information but to find the solutions for gathering post disaster information is essential. By comparing the satellite images, acquired before and after the occurrence of disasters, it is possible to extract the information of damage-hit areas. Currently, we are developing a system for acquiring disaster information, based on the ubiquitous spatial information platform technology. A ubiquitous spatial information platform is a common platform which enables a user to receive and utilize geographic information of "where you are" and/or "where you want to know at anytime". The most fundamental element for ubiquitous spatial information platform technology is the unique ubiquitous identification code (ucode) assigned to real-world objects in a format easily readable by computers. A demonstration of the experiment for developing the disaster information providing system was organized in Kashiwa city, Chiba, Japan. SAR imageries acquired by TerraSAR-X satellite were processed and subtraction analysis was conducted as an experiment for change detection and information distribution for the changed buildings. GIS data for the buildings was previously constructed in order to conduct collation between the change detected points and buildings. In a real disaster situation, the fusion of disaster information extracted from SAR imageries, GIS data of buildings, and ubiquitous solutions would be helpful information for local authorities to realize the scale of the disaster and review the action plan aimed at rehabilitation and reconstruction.