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采用道路网数据库对电子地图进行存储，对于得到地图上若干送货点及配送中心的拓扑关系十分有效。
It's very effective to get the topological relationships between distribution destinations and a physical distribution center when we use the road net database.
通腾提供了道路网络性能的粒状图片，这些图片来自其交通数据库。
TomTom provides a granular picture of road-network performance from its traffic database.
然后利用Arcgis软件建立Geodatabase路网信息数据库和路网专题地图的制作。
Road network information database is established by using ARCGIS software. The thematic maps were produced.
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