Space Analyse Technology Use in Digital City Management

空间分析在gIS中扮演着越来越重要的角色。该文以厦门市数字城市信息管理系统为研究对象,该系统在大屏幕监督指挥子系统中运用了gIS技术,同时基于gIS实际需求使用了改进的空间分析算法以便实现系统功能。改进的空间算法以传统空间分析算法为基础,针对空间数据量庞大检索缓慢的问题,提出了一种基于方向性的最短路径搜索方法。space analyse tech is play more and more important in GIS.This article bases on XIAMEN digital city management system,this system use GIS tech in her big screen supervise and guide vice system,and use improved arithmetic to achieve system function.The im-proved arithmetic bases on the original arithmetic and direct to the space large data search slowly,comes out with a method baess on the direction for the shortcut search

Algorithm of the Optimal Route Based on Urban Emergency Response System

城市应急指挥系统要求在事故发生时,计算出到出事地点的最佳路线的最短时间,其核心算法仍是最短路径算法.针对实际的城市道路网特点,对道路网络模型、道路拓扑结构和数据库结构进行构建.以优化的数据存储结构为切入点,在分析了经典的dIJkSTrA最短路径算法的计算速度瓶颈的基础上,提出了基于方向性的空间最优路径算法,使该算法具有更高的效率.At the time of the accident,the urban emergency response system need to analyze the optimal route,which cost the least time to the scene.So the core algorithm is still the shortest path algorithm of it.According to the actual characteristics of the urban road network,the paper constructed model with the road network,road topology and database structure.With the optimized data storage structure as the entry point and the base of analyzing the computing speed bottlenecks of the classic Dijkstra shortest path algorithm,the paper proposes a more efficiency optimal path algorithm bases on the direction search.厦门智裕科技有限公司资助(0015-K81062