Abstract
This paper proposes "Backbone Data". It is spatial information to share Disaster Mitigating Information (DMI) between various kinds of bodies, such as the government, local authorities, private companies, residents and NPOs. Most disaster mitigating information has references to locations. Backbone Data is designed to receive those references before a disaster happens. First of all, Backbone data is defines. It mainly has three functions, to provide references when DMI is dispatched, to identify locations from references of DMI and to provide information useful for judging what to do next. Then requisites of Backbone Data are examined. Features of Backbone Data are classified into five categories; receptor, identifier, reference, assistant and background. The standard process to build Backbone data is described.
