Development of Gross National safety for natural disasters

An extensive literature survey was conducted to find out the state of the art regarding to the development of systems of indicators of disaster risk and vulnerability at national and sub-national scale. The survey indicates that the system of indicators such as World Risk Index (WRI) is widely accepted. By modifying WRI index, an indicator named GNS (Gross National Safety for natural disasters) was developed in this study and initial calculations were carried out by using various big data available and the result of disaster risk and vulnerability was presented in the prefectural scale.