Navigation apparatus for receiving delivered information
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Abstract
In a communication-type navigation system for downloading map data according to the present invention, a reduction in the amount of map information to be transferred, correction of a position measured by a GPS, and delivery of advertisements are effected. In this system, a terminal 5 stores rough map data in advance. Then, when detailed map data is required, it is downloaded from a map data delivery center to the terminal 5. Further, together with the map data, GPS correction information is delivered to the terminal 5 from the map data delivery center 80. Still further, coupon information associated with an advertisement is displayed and an electronic mail on the coupon information is issued, by the map data delivery center.
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Citations
22 Claims
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1-6. -6 (canceled).
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7. The navigation apparatus for providing route guidance, comprising:
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a data acquisition unit which obtains map data delivered through communication or broadcasting;
a storage media which stores the map data obtained by the data acquisition unit in a first storage area; and
a route guidance controller which reads out map data on a route from a current position of a vehicle to a destination from the first storage area when the map data on the route is stored in the first storage area to give route guidance using a map represented by the map data, and reads out the map data on the route from a second storage area where map data has been stored in advance, when the map data on the route is not stored in the first storage area, to give route guidance using a map represented by the map data, wherein the map data stored in the second storage area represents a map more simplified map than the map represented by the map data delivered and then stored in the first storage area, and wherein the first storage area and the second storage area are provided on different storages.
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8-15. -15 (canceled).
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16. A navigation apparatus for providing route guidance to a destination by downloading map data from a server, comprising:
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a communication unit for communicating with the server;
a storage unit which has a first storage area storing map data obtained by said communication unit and a second storage area storing rough map data covering large geographic areas in advance;
a route guidance unit, for moving from a current position to the destination, which reads out map data around a running position from said storage unit, said map data represents a map on a presentation apparatus to give route guidance, requests detailed map data around the destination and the current positions from the server through said communication unit by transmitting information of the destination and the current position to the server, and stores detailed map data around the destination and the current position, said detailed map data is downloaded from the server based upon said request to the first storage area of the storage unit, wherein said route guidance unit provides route guidance, when the map data around the running position is stored in the first storage area, by reading out the detailed map data around the running position in said first storage area and using a map represented by said detailed map data, and wherein said route guidance unit provides route guidance, when the map data around the running position is not stored in the first storage area, by reading out the rough map data from said second storage area and using a map represented by said rough map data. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification