Map information supply device for mobile units
First Claim
Patent Images
1. A map information device comprising:
- a storage unit for map data recorded in a rectangular coordinate system based on a length at the equator where a vertical direction is a latitude and a horizontal direction is longitude;
a route search unit for searching for a route based on information on two geographical points;
an area generator unit to set an area along the route between the two geographical points by correcting a east-west width of the area by a factor based on latitude values of the routes; and
a map search unit to then search for map data for the corrected width area and to output the map data of the corrected width area.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a arrangements of map information supply device for mobile units.
64 Citations
18 Claims
-
1. A map information device comprising:
-
a storage unit for map data recorded in a rectangular coordinate system based on a length at the equator where a vertical direction is a latitude and a horizontal direction is longitude; a route search unit for searching for a route based on information on two geographical points; an area generator unit to set an area along the route between the two geographical points by correcting a east-west width of the area by a factor based on latitude values of the routes; and a map search unit to then search for map data for the corrected width area and to output the map data of the corrected width area. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A map information device connected to a terminal, comprising:
-
a route search unit for searching for a route based on information for two geographical points from the terminal; a route area predictor for predicting enroute stopping points along the route based on the information from the terminal and position information of the searched route; an area generator unit to set a search area along the route and to expand the search area along the route in the vicinity of the predicted enroute stopping points; and a map search unit to then search for map data for the search area, which is expanded in the vicinity of the predicted enroute stopping points, from a map database and to output the map data for the search area expanded in the vicinity of the predicted enroute stopping points. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
-
-
17. A map information device, comprising:
-
a storaqe unit for map data recorded in a rectangular coordinate system based on a length at the equator where a vertical direction is a latitude and a horizontal direction is longitude; a route search unit for searching for a route based on information on two geographical points; an area generator unit to set an area along the route between the two geographical points by correcting a east-west width of the area by a factor based on latitude values of the routes; and a map search unit to then search for map data for the corrected width area and to output the map data of the corrected width area; wherein the map search unit subdivides the area into multiple area units, and determines map data that intersects or is included in the areas by the subdivided area unit.
-
-
18. A map information device, comprising:
-
a storage unit for map data recorded in a rectangular coordinate system based on a length at the eguator where a vertical direction is a latitude and a horizontal direction is longitude; a route search unit for searching for a route based on information on two geographical points; an area generator unit to set an area along the route between the two geographical points by correcting a east-west width of the area by a factor based on latitude values of the routes; and a map search unit to then search for map data for the corrected width area and to output the map data of the corrected width area; with the map data based on rectangular coordinates, wherein the area generator unit establishes the area by correcting a width of the area based on latitude values of the route.
-
Specification