Patent ID: 8483950

Claim:
A route guidance server providing a navigation apparatus with route information on a navigation route, the route guidance server comprising: a map data base inclusive of map data a navigation route searching section for searching the navigation route from a start point to an end point with reference to the map data, wherein there are nodes on the navigation route; a route point information creation section that preferentially selects route notes from among the nodes on the navigation route from the start point to the end point and sets a complementary point for each of the selected route nodes with reference to the map data, wherein each of the selected route nodes is connected with a larger number of branches than other unselected nodes, the complementary point is on one of road links constituting the navigation route, the one of the road links has an end point at each of the selected route nodes, each of the complementary points is more than a predetermined distance or the predetermined distance apart from the end point and is not closer to another road in a vicinity of the selected route nodes than the one of the road links; and a route information transmission section that transmits to the navigation apparatus the route information inclusive of coordinate information on the each of the selected route nodes and coordinate information on the complementary point set for the each of the selected route nodes.