城市地下管网随着城市的建设日趋复杂,地下管网在城市的正常运转中发挥着至关重要的作用。城市管网地理信息系统有效地解决了复杂管网规模下管网数据的组织和有效管理。地理信息系统与Internet结合形成的WebGIS,使越来越多的人能轻松获取地理信息数据,随着网络地图并发访问量的增加,对地图服务的性能要求也越来越高。网络地图缓存技术作为提升服务器与客户端间交互效率的重要措施,也成为地图服务方向研究的热点问题。针对地图缓存技术中的地图切片规则、切片编码、切片组织和存储、切片索引等关键技术进行了深入研究。归纳总结了一种电子地图切片方法,编程实现了城市地下管网系统和地图切片程序。通过系统测试表明,地图缓存技术的应用在解决系统响应时间上具有明显的优化作用。%Urban underground pipe network is becoming more complex with the city’ s construction,and it plays a vital role in the normal operation of the city. The urban pipe network geographic information system can effectively solve the organization and effective manage-ment of the network data under the complex pipe network. WebGIS that is formed by combining geographic information systems with the Internet lets more and more people have easy access to geographic information data. With increase of the network map concurrent views, the request of map service performance is also becoming higher and higher. As an important measure to improve the efficiency of interac-tion between server and client,network map caching technology has become a hot issue in map service orientation. The map cache tech-nology in the map of the rules,the slice of encoding,slicing organization and storage,slice index and other key technologies have been studied. An electronic map slicing method is summarized. Urban underground pipe network system and map slicing program are realized by programming. The application of map cache technology is proved to have a significant optimization on the response time of the sys-tem.
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