Route selection system and method utilizing integrated crossings, a starting route, and/or route numbers
First Claim
1. A route selection method for selecting an optimum route on a map, comprising:
- a first step of integrating crossings, which satisfy predetermined conditions, with each other in original data which describes a detailed road system having an actual number of crossings, thereby creating route selection data with a reduced number of crossings than the actual number of crossings; and
a second step of searching for the optimum route between a starting place and a destination as being designated through said route selection data.
1 Assignment
0 Petitions
Accused Products
Abstract
A route selection data storage unit 7 stores route selection data which are created from original data describing a detailed road system. When a plurality of crossings and a plurality of roads which are expressed on the road system in the original data satisfy prescribed conditions, these crossings and roads are integrated with each other respectively and recorded in the route selection data. The route selection data include a passage link table, so that links which are deleted by integration of the crossings are not missed. The passage link table records links which are deleted due to the integration of the crossings but passed in practice with reference to approach and escape links as to the respective crossings integrated with each other. An optimum route search unit 6 searches for the optimum route between a starting place and a destination which are designated by a position detection unit and/or a spot input unit 5 through the route selection data. When the optimum route obtained through the search passes through the integrated crossings, the optimum route search unit 6 supplements the deleted links with corresponding passage links recorded in the passage link table.
63 Citations
43 Claims
-
1. A route selection method for selecting an optimum route on a map, comprising:
-
a first step of integrating crossings, which satisfy predetermined conditions, with each other in original data which describes a detailed road system having an actual number of crossings, thereby creating route selection data with a reduced number of crossings than the actual number of crossings; and a second step of searching for the optimum route between a starting place and a destination as being designated through said route selection data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A route selection system for selecting an optimum route on a map, comprising:
-
a route selection data storage means for storing route selection data which are created from original data describing a detailed road system, and which includes a reduced number of crossings by integration of crossings, which satisfy predetermined conditions in the original data, with each other; and an optimum route search means for searching for the optimum route between a starting place and a destination as being designated through the route selection data. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A route selection system for selecting an optimum route on a map, comprising:
-
starting route search means for searching for optimum routes from a starting place to respective spots which are present in a prescribed range and for selecting any one of the optimum routes as a starting route; output means for outputting the starting route obtained by said starting route search means for guidance; and optimum route search means for searching for an optimum route to a destination after the starting route is outputted from the output means. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
-
-
29. A route selection method comprising:
-
accessing route selection data which represents a road system and route numbers each of which are arbitrarily set for prescribed roads; and obtaining a route from a starting place or its vicinity to a destination or its vicinity on the basis of the route numbers. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
-
-
40. A route selection system, employing route selection data which represents a road system and predetermined route numbers for prescribed roads, for selecting a route between a starting place and a destination, comprising:
-
first search means for searching for optimum routes to respective spots which are present in a predetermined constant range from the starting place; second search means for searching for optimum routes to respective spots which are present in a predetermined constant range from the destination; comparing means for comparing roads passing both the ranges being searched by said first and second search means with each other; and route selection means for selecting a combination of (1) an optimum route between the starting place and a road having a route number, (2) a road having the route number, and (3) the optimum route between the road having the route number and the destination, as the route connecting the starting place with the destination, when roads having a same route number are present as a result of the comparison by said comparing means. - View Dependent Claims (41)
-
-
42. A route selection system employing route selection data which represents a road system and predetermined route numbers for prescribed roads, for selecting a route from a starting place to a destination, comprising:
-
designation means for making the user designate a spot to be passed; retrieval means for retrieving a route number corresponding to the spot being designated by said designation means from the route selection data; first search means for searching for an optimum route between the starting place and a road having the retrieved route number; second search means for searching for an optimum route between the road having the retrieved route number and the destination; and route selection means for selecting a combination of the optimum route in a vicinity of the starting place searched for by said first search means, the road having the retrieved route number, and the optimum route in a vicinity of the destination searched for by said second search means, as a route connecting the starting place with the destination.
-
-
43. A route selection method comprising:
-
accessing route selection data which represents a road system and predetermined route numbers which are set for a plurality of continuous roads which become one route; and obtaining a route from a starting place or its vicinity to a destination or its vicinity on the basis of the route numbers without searching on parts of the plurality of continuous roads for which the route numbers are set.
-
Specification