Design and Realization of Emergency Space Database for Chemical Accident Based on GIS

Hazardous chemical accidents are frequently and terribly threatening the safety of people's lives and the ecological environment. In order to manage hazardous chemical effectively and dispose chemical accident accurately in good time, aimed at large numbers of types and attribute of chemicals and its voluminous accident data, a compound emergency space database for chemical accident was built up based on GIS. That include image database, attribute database, mathematical model database and decision-making database By the general control module, the general work environment of space database was formed, so as to realize the data collecting and update, information query, dynamic simulation display, emergency analysis and assessment, assisting decision-making and so on. Every function of the space database and the process of building the space database were systematically discussed.