Data storage and update method for electronic map

A map data and data storage technology, applied in the direction of digital data processing, special data processing applications, maps/plans/charts, etc., can solve the problems of large communication volume, long time, inaccurate navigation map data, etc., to reduce concentration The effect of transmission, improving storage efficiency, and improving response speed

Active Publication Date: 2005-01-26
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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Problems solved by technology

Such a long update cycle leads to inaccurate navigation map data, resulting in wrong driving route guidance
Although the update speed of the electronic map can be improved through mobile communication technology, the existing overall data update method will generate a large amount of communication. Due to the limitation of mobile communication bandwidth, a large amount of data communication takes a long time, resulting in relatively high communication cost

Method used

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  • Data storage and update method for electronic map
  • Data storage and update method for electronic map
  • Data storage and update method for electronic map

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Embodiment Construction

[0036] Figure 1 shows the general model of the geographic data file (GDF) stipulated in the ISO14825:2004 international standard. According to this model, various geographic information on the map can be represented by elements, attributes of elements, and semantic relationships between elements. Each of these map features can in turn be uniquely represented using its own identification code (ID). A city map may contain thousands of map features. Although some map elements need to be changed with the construction of road traffic facilities, the proportion of map elements that change every day in all map elements is usually very small. According to this characteristic of map data change, the present invention proposes a map element storage file structure suitable for dynamic incremental update. For the sake of brevity, the specific implementation of the present invention will be described here by taking the local map including 5 intersection nodes and 4 road sections as shown ...

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Abstract

This is a technique storing and updating the data of electronic map. In accordance with the map factor ID, it can store map data and filter the date downloaded in order to accomplish the electronic map's download of dynamic increment and the update. The user can rapidly download the data of electronic map relevant to the course this time through data service end of map and get the convenience of dynamic navigation. The update of dynamic increment can make electronic map hold the newest mode all the time and can improve the accuracy of accounting navigation course greatly. As the map data during downloading and updating course is filtered, it can avoid the retransmit of data and abate the communicating quantity of updating and save the time and expense of communication.

Description

Technical field [0001] The invention relates to a method suitable for storing and updating electronic map data, especially suitable for storing and updating electronic map data of a mobile navigation device. Background technique [0002] The technology of using CDROM or other storage media to store electronic map data and provide electronic map data for navigation through an external data center has been widely used, such as Chinese invention patent ZL98811353.8, Chinese invention patent application 97113628.9 and Chinese invention patent application 00814198.3 The technology disclosed in the specification, the Chinese invention patent application 97113628.9 specification cites a large number of documents, discusses various prior art processing methods and their respective defects, and proposes a method for reducing the amount of communication data by making deformed maps. However, the map generated by the deformed map method is a schematic diagram, which cannot meet the pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/20G01C21/34G06F17/30G09B29/10
Inventor 曲声波郑纲
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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