Navigation system
First Claim
1. A navigation system, comprising:
- a receiving section that receives traffic information including congestion information;
a congestion information acquisition section that obtains from the traffic information, items of congestion information related to a map information display;
a congestion information extraction section that extracts, from the items of congestion information obtained by the congestion information acquisition section, a congestion information group with a specified congestion level;
an overlap determination area creation section that, based on road links related to the items of congestion information within the congestion information group, creates an overlap determination area that extends both transversely and longitudinally for a specified distance from the road link;
a grouping section that groups the items of congestion information having overlapping determination areas;
an equal congestion level area creation section that creates an equal congestion level area by connecting the overlapping determination areas of the grouped items of congestion information; and
a display control section that displays the equal congestion level area superimposed on the map information display.
1 Assignment
0 Petitions
Accused Products
Abstract
When a display area for map information is reduced to a specified scale for a wide area display, items of congestion information are extracted which have a congestion level of “congested or busy”, and an overlap determination area is created for a congestion link of each item of the extracted congestion information. The overlap determination area extends both transversely and longitudinally for a specified distance from the congestion link. Also, for each group of congestion information items having overlapping determination areas, an equal congestion level area is created by connecting the overlap determination areas. The equal congestion level area is displayed on a liquid crystal display in a color that corresponds to the congestion level of the equal congestion level area. The equal congestion level areas are also created in the same manner for the congestion information items with congestion levels of “congested” and “not congested”, and they are also displayed on the liquid crystal display in different colors that correspond to their respective congestion levels. Roads are then displayed if of a type allowed by the scale of reduction.
49 Citations
10 Claims
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1. A navigation system, comprising:
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a receiving section that receives traffic information including congestion information; a congestion information acquisition section that obtains from the traffic information, items of congestion information related to a map information display; a congestion information extraction section that extracts, from the items of congestion information obtained by the congestion information acquisition section, a congestion information group with a specified congestion level; an overlap determination area creation section that, based on road links related to the items of congestion information within the congestion information group, creates an overlap determination area that extends both transversely and longitudinally for a specified distance from the road link; a grouping section that groups the items of congestion information having overlapping determination areas; an equal congestion level area creation section that creates an equal congestion level area by connecting the overlapping determination areas of the grouped items of congestion information; and a display control section that displays the equal congestion level area superimposed on the map information display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification