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Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus

An in-vehicle navigation and initial technology, which is applied in the directions of road network navigator, navigation, surveying and mapping, and navigation, can solve the problems of discount on the function of retrieving points of interest, inconvenience for users, and not achieving the expected effect, etc. The effect of improving retrieval speed and improving accuracy

Inactive Publication Date: 2008-04-16
XIAMEN YAXON NETWORKS CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Centralized vehicle navigation systems may be fine since they operate on a PC, but users of autonomous vehicle navigation systems are inconvenient
This makes the function of searching points of interest according to pinyin greatly reduced, and does not achieve its expected effect

Method used

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  • Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus
  • Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus
  • Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus

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Embodiment Construction

[0046] Such as figure 1 As shown, the retrieval processing part of the present invention is completed by two steps:

[0047] Step 1: Convert and package the POI data to generate an index file for pinyin retrieval. On the PC in the early stage, the original data files of the points of interest are converted and packaged according to the specified format, and the index files for retrieval are generated.

[0048] The index file is composed of two groups of files. The first group of files stores the specific data of the index file. In this file, the data is sorted according to the first letter of the pinyin; the second group of files is used for pinyin retrieval. Pinyin initial letter search, obtain the serial number of the search result in the first set of files, and then obtain the final search result through the first set of data.

[0049] The structure of the index file is:

[0050]

[0051] The specific organizational structure of the first group and the second group of...

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Abstract

The invention relates to a method for searching concerned sites according to the initial letter of phonetic symbol in a networked vehicle navigating device, comprising the following procedures that: firstly, the data of concerned sites is packed to produce an index file for searching by phonetic symbol, and the index file is composed of two groups of files; the first group of files store detailed data of index file; the second group of files are used for searching by phonetic symbol; secondarily, the data of concerned sites is searched by phonetic symbol, and the initial-letter strings of all Chinese characters are split into a plurality of initial-letter keywords, the record number of the keyword in the first group of files is obtained by searching the initial letters of the keyword of the second group of files, an intersection of key words is taken to produce an intersection array and get final searched results and then display the final searched result; users find demanded concerned sites in the searched results; the invention processes the original index data once again and compresses data redundancy and enhances searching speed, meanwhile, the initial letter of the keyword in one concerned site is just needed to input, so the searching accuracy is greatly enhanced.

Description

technical field [0001] The invention relates to a method for retrieving pinyin initials, in particular to a method for retrieving points of interest in a networked vehicle navigation device according to the initials of pinyin. technical background [0002] The Chinese national standard "General Specifications for Automotive GPS Navigation Systems" (GB / T 19392-2003) defines a point of interest (POI) as follows: a point of interest refers to an entrance and exit location that can describe a specific address, as a system The goal of vehicle navigation. In terms of system function requirements, this specification also requires the car navigation system to have the target retrieval function, one of which is that the system should provide the point of interest retrieval function for the navigation destination. [0003] At present, the navigation map data provided by electronic navigation map manufacturers contains a large amount of navigation information data, among which the inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/00G01C21/34
Inventor 许宁季刚李金彭勇
Owner XIAMEN YAXON NETWORKS CO LTD
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