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Electronic navigation system information searching method and device thereof

A technology of information retrieval and electronic navigation, applied in road network navigators, electronic digital data processing, special data processing applications, etc., can solve the problems of inability to retrieve and low retrieval accuracy, and achieve the goal of improving retrieval accuracy and shortening response time Effect

Active Publication Date: 2008-02-27
ALIBABA (CHINA) CO LTD
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AI Technical Summary

Problems solved by technology

[0003] The shortcoming of prior art is: owing to adopting to find out the field that matches search word in database, just all characters of search word are used as a keyword to match, for example: user input: "Chinese Academy of Sciences National Planning Commission Geography The search term "Institute" is used to find a field that is exactly the same as "Institute of Geography, National Planning Commission, Chinese Academy of Sciences" in the database. If the user does not remember the full name, but only a few words such as "National Planning Commission", then the existing technology cannot be retrieved, so the existing technology retrieval accuracy is low

Method used

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  • Electronic navigation system information searching method and device thereof
  • Electronic navigation system information searching method and device thereof
  • Electronic navigation system information searching method and device thereof

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Embodiment Construction

[0042] As shown in Figure 1, the information retrieval method of electronic navigation system of the present invention comprises the following steps:

[0043] Step 1) receiving the search term;

[0044] Step 2) classifying the search terms, and performing word segmentation to obtain some lexical units;

[0045] Step 3) Retrieve the field matched with the lexical element in the navigation electronic map database;

[0046] Step 4) Display information related to the field.

[0047] The word segmentation in the above refers to the process of recombining continuous word sequences into word sequences according to certain specifications. For example: "No. 33, Xueyuan Road, Haidian District, Beijing", this Chinese character string can be processed by word segmentation to obtain four word segmentation units of "Beijing", "Haidian District", "Xueyuan Road" and "No. 33", also known as four lemmas, that is, the search term "No. 33 Xueyuan Road, Haidian District, Beijing" is decomposed ...

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Abstract

The invention discloses an information retrieval method of electronic navigation system including steps: receive search term; participle the said search term to obtain word elements; search out in the navigation map database the matched words; show relevant information of the said fields. Correspondingly the invention also discloses information retrieval device of electronic navigation system including input unit, used to receive search terms; participle unit, used to participle the said search term to obtain word elements; matching unit, used to search out the matched words in the navigation map database with the said search term or elements; display unit, used to display the relevant information matched with search term. With the technology program by the invention can retrieve the necessary information without input the full name, greatly improves the response time and retrieval accuracy.

Description

technical field [0001] The invention relates to the field of electronic navigation, in particular to an information retrieval method and device for an electronic navigation system. Background technique [0002] Existing vehicle-mounted satellite navigation systems generally provide an information retrieval method in the navigation electronic map database, including receiving input search terms; finding a field matching the search term in the navigation electronic map database; Related information. The navigation electronic map database is used to store electronic map information, such as names and coordinates of places and so on. [0003] The shortcoming of prior art is: owing to adopting to find out the field that matches search word in database, just all characters of search word are used as a keyword to match, for example: user input: "Chinese Academy of Sciences National Planning Commission Geography The search term "Institute" is used to find a field that is exactly t...

Claims

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Application Information

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IPC IPC(8): G01C21/26G01C21/34G01C21/36G06F17/30
Inventor 姜德荣孙竹平
Owner ALIBABA (CHINA) CO LTD
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