Risk Regionalization of Meteorological Calamities Based on GIS and Rough Set Theory

Abstract

The calculation of risk regionalization of meteorological calamities, usually determines the weight factors involved in the calculation by a subjective evaluation and objective calculation method, and the information should be more accurate or perfect. As the determination of the weight factors of meteorological disasters have limitations by subjective evaluation method and the objective calculation method, since the acquisition of information with multiple dimensions, has uncertainty. We propose a calculation method of meteorological disaster risk zoning of a rough set theory with GIS technology, and use this technology to evaluate the division of spatial unit and spatial factors index. The spatial unit of conditional attributes and decision attributes determine the weight of influence factors based on meteorological disasters. We can also determine the regionalization of the risk of meteorological calamities based on GIS spatial technology. The result indicated that the application of rough sets theory, combined with GIS technology can fully describe the relationship of spatial data though the information is still incomplete and uncertain. Moreover, it can be better to solve the practical problems in the calculation of meteorological disaster risk zoning.