Archive for the Category: network

SpatiaLite VirtualNetwork 介绍

  SpatiaLite  VirtualNetwork 是SpatiaLite的一个扩展,通过SQL语句实现routing功能 SpatiaLite  VirtualNetwork实现了经典的 Dijkstra算法, Dijkstra算法介绍如下: 要使用这个模块,首先要building network,也就是要把网络拓扑构建出来,将地理数据映射到图论的拓扑结构中。 测试数据下载: test-network-2.3.sqlite 1 network需要的地理数据的基本结构如下: column name data type meaning PK_UID INTEGER the primary key identifying each arc F_NODE INTEGER the code identifying the arc’s start node T_NODE INTEGER the code identifying the arc’s end node Type TEXT the road category [i.e. highway, primary …] Speed INTEGER the estimated mean speed [Km/h] TravelTime DOUBLE the […]

Also posted in route, spatialite Leave a comment