Semantic Symbols Extraction Model for Emergency Hazard Map

Emergency event information released in map is necessary for emergency management and disaster reduction. A new method for emergency map symbols extraction from symbol collection based semantic analysis is presented in this paper. A novel map symbol semantic matrix is introduced to measure the degree of the semantic representation between the symbol meaning and the emergency event conception. The necessary content factors of emergency released in map are conduced by analyzing the emergency content construction and statistic result of the emergency content published by national disaster reduction center. The fuzzy comprehensive evaluation is proposed to extract the map symbol class. The sub function ( ) i i f k is designed to confirm the risk of factor-ki . The simulation results verify the feasibility of emergency semantic model and its extraction model. Keywords-Symbol; Semantic Construction; Emergency; Fuzzy comprehensive evaluation.