On-vehicle information terminal route characteristics extraction apparatus and route characteristics display method
First Claim
Patent Images
1. An information terminal, comprising:
- a route search unit that searches for a plurality of routes connecting a current position to a destination;
a table preparing unit that prepares a block name-distance table for each of the routes, which is constituted with road names of roads included in the routes and distances over which individual blocks of the routes extend, each corresponding to specific road name, based upon route data containing link information of the routes;
an identification unit that identifies road names of blocks each of which extends over a longest distance in each of the routes based upon the block name-distance table;
a characteristics extraction unit that extracts the identified road names as characteristics of the routes; and
a display control unit that displays the extracted characteristics of each of the routes at a display device.
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Abstract
An on-vehicle information terminal comprises a route search unit that searches for a plurality of routes connecting a current position to a destination and a characteristics extraction unit that extracts characteristics of each route searched by the route search unit based upon geographic names. The on-vehicle information terminal displays the characteristics of individual routes extracted by the characteristics extraction unit at a display device.
7 Citations
13 Claims
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1. An information terminal, comprising:
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a route search unit that searches for a plurality of routes connecting a current position to a destination; a table preparing unit that prepares a block name-distance table for each of the routes, which is constituted with road names of roads included in the routes and distances over which individual blocks of the routes extend, each corresponding to specific road name, based upon route data containing link information of the routes; an identification unit that identifies road names of blocks each of which extends over a longest distance in each of the routes based upon the block name-distance table; a characteristics extraction unit that extracts the identified road names as characteristics of the routes; and a display control unit that displays the extracted characteristics of each of the routes at a display device. - View Dependent Claims (2, 3, 8)
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4. An information terminal, comprising:
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a route seareh unit that searches for a plurality of routes connecting a current position to a destination; a route breakup point setting unit that sets points corresponding to individual positions breaking up each of the routes into a predetermined number of equal segments as route breakup points; a calculation unit that calculates sums each representing a total of linear distances between route breakup points at corresponding positions in the routes among the route breakun points having been set; a maximum distance route breakun point setting unit that sets route breakup points with a largest sum as maximum distance route breakup points; a characteristics extraction unit that extracts geographical names of geographical points at which the maximum distance route breakup points are present as characteristics of the routes; and a display control unit that displays the extracted characteristics of each of the routes at a display device. - View Dependent Claims (5, 6, 7, 11)
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9. A route characteristics extraction apparatus, comprising:
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a route search unit that searches for a plurality of routes connecting a current point to a destination; a table preparing unit that prepares a block name-distance table for each of the routes, which is constituted with road names of roads included in the routes and distances over which individual blocks of the routes extend, each corresponding to specific road name, based upon route data containing link information of the routes; an identification unit that identifies road names of blocks each of which extends over a longest distance in each of the routes based upon the block name-distance table; a characteristics extraction unit that extracts the identified road names as characteristics of the routes; and an output unit that provides an external recipient with a signal output indicating the characteristics of the individual routes extracted by the characteristics extraction unit.
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10. A route characteristics display method comprising:
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searching for a plurality of routes connecting a current point to a destination; preparing a block name-distance table for each of the routes, which is constituted with road names of roads included in the routes and distances over which individual blocks of the routes extend, each corresponding to snecific road name, based upon route data containing link information of the routes; identifying road names of blocks each of which extends over a longest distance in each of the routes based upon the block name-distance table; extracting the identified road names as characteristics of the routes; and displaying the extracted characteristics of each route.
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12. A route characteristics extraction apparatus, comprising:
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a route search unit that searches for a plurality of routes connecting a current position to a destination; a route breakup point setting unit that sets points corresponding to individual positions breaking up each of the routes into a predetermined number of equal segments as route breakup points; a calculation unit that calculates sums each representing a total of linear distances between route breakup points at corresponding positions in the routes among the route breakup points having been set; a maximum distance route breakup point setting unit that sets route breakup points with a largest sum as maximum distance route breakup points; a characteristics extraction unit that extracts geographical names of geographical points at which the maximum distance route breakup points are present as characteristics of the routes; and an output unit that provides an external recipient with a signal output indicating the characteristics of the individual routes extracted by the characteristics extraction unit.
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13. A route characteristics display method comprising:
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searching for a plurality of routes connecting a current position to a destination; setting points corresponding to individual positions breaking up each of the routes into a predetermined number of equal segments as route breakup points; calculating sums each representing a total of linear distances between route breakup points at corresponding positions in the routes among the route breakup points having been set; setting route breakup points with a largest sum as maximum distance route breakup points; extracting geographical names of geographical points at which the maximum distance route breakup points are present as characteristics of the routes; and displaying the extracted characteristics of each route.
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Specification