A navigation system comprises a navigation device (11) on a moving body and a data delivery server (41). The server has a means (52) for generating first guide map data including main points ahead of a branching point, direct branching roads between the branching point and main points, and simple congestion information; a means (53) for generating second guide map data including detailed congestion information, the branching point, the main points, points other than the main points, the direct branching roads, and a plurality of roads connecting the direct branching roads, main points, and points other than the main points; and a means (54) for delivering the first and second guide map data to the navigation device. The navigation device has a guide map display means (34) that displays a first guide map when a first guide point is reached and displays a second guide map when a second guide point is reached.
Navigation system, navigation device, and data delivery server
2015-11-25
Patent
Electronic Resource
English
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