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.
在此基础上采集大量道路信息，溶入GIS技术，建立城市道路网络数据库。
Based on the collection of road information, the road network database is constructed by means of GIS technology.
在此基础上采集大量道路信息，溶入GIS技术，建立城市道路网络数据库。
Based on the collection of road information, the road network database is constructed by means of GIS technology.
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