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Map data updating method of navigation device

A technology of navigation device and map data, which is applied in the directions of road network navigator, electric digital data processing, special data processing application, etc. The effect of small data traffic

Inactive Publication Date: 2007-11-28
江苏华科导航科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the map data update method in the above prior art only updates the required differential data, which greatly reduces the data flow, the updated data flow is still relatively large in actual use, which often affects normal use.

Method used

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  • Map data updating method of navigation device

Examples

Experimental program
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Embodiment 1

[0020] See Fig. 2, in the present embodiment, navigation device 1 also comprises: CPU unit 12, the map database 11 that is bidirectionally electrically connected with CPU unit 12, the wireless communication unit 13 that is bidirectionally electrically connected with CPU unit 12, and CPU unit 12 bidirectionally electrically Connected program database 14 for storing navigation programs, voice output device 15 bidirectionally electrically connected with CPU unit 12, touch screen control unit 16 bidirectionally electrically connected with CPU unit 12, GPS receiver bidirectionally electrically connected with CPU unit 12 17 and a USB unit electrically connected to the CPU unit 12 bidirectionally. The map database 11 is electrically connected to the CPU unit 12 bidirectionally.

[0021] Referring to FIG. 1 , the server 2 as a computer has a corresponding map database 21 . The navigation device 1 and the server 2 perform data communication through a wired or wireless communication ne...

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PUM

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Abstract

The invention relates to an updating method for map data of guider. It comprises that map data carrying out grid partition for surface digital map in the same region is deposited in map data base of guider and server; all map data corresponding to grid form independent data packet with different number; all data packets have corresponding edition information; all data packets in map data base of server can be updated manually to form data packets with new edition and updating explaining information for data packets with new edition corresponding to data packets with original edition; by wire or no-wire communication net, edition information comparison of data packets with corresponding numbers in each map data base in guider and server is carried out; if data packets with new edition exist in the map data base of server, the guider downloads updating explaining information of data packets with new edition from the map data base of server and corresponding data packets in map data base of guider are amended according to it.

Description

technical field [0001] The invention relates to a method for updating map data of a navigation device. Background technique [0002] Map data including data such as roads and facilities are stored in car navigation systems. By using the map data, the car navigation device realizes a function of displaying a map of the vicinity of the vehicle position on the screen or searching for a destination designated by the user and a route through the place. And urban traffic rules and road distribution are often updated, in order to obtain these updated data, the user must go to the customer service or the dealer to update the map data of the navigation device. The data update of the navigation device in the prior art is to update the entire map database. This method is time-consuming and inefficient. . [0003] Therefore, it has been proposed to update only the difference data required at this time among the map data of the car navigation system. For example, Japanese Patent Docu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/32G08G1/096G06F17/30G09B29/10
Inventor 秦春达李晓华
Owner 江苏华科导航科技有限公司
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