The risk mapping functionality of GIS can show the users the relative risk grade of different areas in the city, giving the city designers some reference about how to carry out factory siting and...

• 利用GIS进行风险地图绘制,可以图示市区内不同地段或区域的相对风险大小,辅助城市管理者进行工厂选址与设计、区域和土地使用决策、危险物质运输路线确定等;