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Method, device and system for updating increment of navigation electronic map

An incremental update, electronic map technology, applied in the field of satellite navigation, can solve the problems of validity and efficiency that need to be further verified, complex compilation, immature technology, etc., to achieve easy online update of navigation data, reduce the total amount, and reduce network transmission. effect of quantity

Active Publication Date: 2012-07-25
NAVINFO
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AI Technical Summary

Problems solved by technology

[0033] Compilation is complicated and requires professional manufacturers to compile;
[0034] The technology is not yet mature, and the effectiveness and efficiency need to be further verified

Method used

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  • Method, device and system for updating increment of navigation electronic map
  • Method, device and system for updating increment of navigation electronic map
  • Method, device and system for updating increment of navigation electronic map

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Embodiment Construction

[0088] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0089] refer to image 3 , the incremental update method of the electronic navigation map of the embodiment of the present invention, comprising the following steps:

[0090] Step 301: the central server traverses all the records of the reference map file, generates a permanent ID for each record using a hash algorithm, and stores the generated permanent ID and the corresponding record in the first hash table;

[0091] Step 302: The central server traverses all the records of the updated version of the map file, generates a permanent ID for each record using a hash algorithm, and stores the generated permanent ID and the corresponding record in the second hash table;

[0092] In order to extract differential data according to the dynamically genera...

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Abstract

The invention provides a method, a device and a system for updating the increment of a navigation electronic map. The method comprises the following steps of: traversing all records of a reference edition map file, generating the permanent ID of each record by the Hash algorithm, and storing the generated permanent IDs and the corresponding records in a first hash table; traversing all records of an updated edition map file, generating the permanent ID of each record by the Hash algorithm, and storing the permanent IDs and the corresponding records in a second hash table; comparing the first hash table with the second hash table to generate a differential data file, wherein the differential data file contains records needing to be deleted and records needing to be added; and providing the differential data file to a navigation terminal so that the navigation terminal restores the updated edition map file according to the differential data file and the reference edition map file. The method is capable of realizing the increment updating of the navigation electronic map without recording and adding the permanent IDs during data production.

Description

technical field [0001] The invention relates to the field of satellite navigation, in particular to a method, device and system for incremental updating of a navigation electronic map. Background technique [0002] In the real world, there are always new construction, opening and abolition of roads and changes in road traffic rules, especially in emerging countries like China that are engaged in infrastructure construction, there are about 30% to 40% changes every year. In order to reflect these changes, the data on the navigator side needs to be updated. The traditional data update method is that the electronic map supplier releases a new version of data, and then notifies the customer to update the data at the corresponding update site. This update method has the following disadvantages: [0003] The update cycle is relatively long, and it cannot reflect changes in geographic information in the real world in a timely manner, that is, the navigation data is not current; ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/32
Inventor 高剑王乐乐
Owner NAVINFO
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