04926336 is referenced by 172 patents and cites 2 patents.

A route searching system having node data 3 representing information on positions and attributes of the same, intersection data 1 representing information on intersections, road data 2 representing information on roads, and a route searching section 4 for searching for the optimum route from the intersection data and the road data. Weighted information based on road circumstances is included in the road data, and weighing is performed in accordance with the weighted information with respect to possible routes searched by the route searching section to find the optimum route. This system enables the time taken for traveling along a selected course to be computed with reference to the weighted information and enables route searching to be performed in short period of time. Also, intersections to be passed without turning can readily be removed to prepare guidance data only from data necessary for guidance.

Title
Route searching system of navigation apparatus
Application Number
7/290207
Publication Number
4926336
Application Date
December 27, 1988
Publication Date
May 15, 1990
Inventor
Takashi Yamada
Anjo
JP
Agent
Varndell Legal Group
Assignee
Kabushiki Kaisha Shinsangyokaihatsu
JP
Aisin AW
JP
IPC
G06F 15/50
View Original Source