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
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[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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