CN101162146A - Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus - Google Patents
Method for searching interest points according to the first letter of phonation in networking vehicle mounted guidance apparatus Download PDFInfo
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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
The present invention relates to a kind of first letter of pinyin search method, relate in particular to the method that point of interest is retrieved by first letter of pinyin in a kind of networking vehicle mounted guidance equipment.
Technical background
In the CNS " automobile GPS navigation system general specification " (GB/T 19392-2003) point of interest (point of interest POI) has been done as giving a definition: point of interest is meant the position, gateway that can describe particular address, with the target as system's automobile navigation.Aspect the systemic-function requirement, this standard also requires auto-navigation system to possess the target retrieval function, and one of them is exactly that the system destination that should be navigation provides the interest point search function.
Current, the navigation map data that digital navigation map manufacturer provides has comprised a large amount of navigation information data, and wherein interest point information is particularly abundant.The expression of will classifying of general interest point information as big class, middle class, group, comprises class living informations up to a hundred such as refuelling station, parking lot, hotel, snack bar, bank, amusement and recreation, market, supermarket and government bodies.How in Vehicular navigation system, to retrieve these points of interest easily and quickly, it as navigation destination, is become very distinct issues.
The vehicle GPS navigational system is divided into autonomous land vehicle navigational system, center type Vehicular navigation system now basically.The navigation map of autonomous land vehicle navigational system, Navigator are placed in the vehicle mounted guidance terminal equipment, and this equipment generally all has a display screen, and user (driver) directly carries out navigation operation on screen.The navigation map of center type Vehicular navigation system, Navigator then are placed on the PC or server of navigation center, and generally make a phone call navigation center requests navigation of user is carried out navigation operation by the operating personnel of navigation center.No matter be which kind of Vehicular navigation system, destination retrieval modes such as phonetic, address, classification, telephone number are provided at present basically.
For the mode of pressing the phonetic retrieval point of interest, though all be the initial phonetic of input point of interest, then be not quite similar in actual use, that have even very loaded down with trivial details.Mainly show: must import the initial phonetic that point of interest is whole, and can not import the initial phonetic of point of interest keyword wherein; Initial phonetic must be capitalized; The sequencing of initial phonetic keyword input can not be changed.The center type Vehicular navigation system is owing to operate on PC, and possibility is not bad, but is to use the user of autonomous land vehicle navigational system just very inconvenient.Have a greatly reduced quality by the function of phonetic retrieval point of interest with regard to making like this, do not reach its Expected Results.
Summary of the invention
The present invention aims to provide a kind of method by the first letter of pinyin searching interest point simple, convenient in apparatus for vehicle navigation, when Any user (driver) is carried out by the first letter of pinyin searching interest point on apparatus for vehicle navigation, only need the first letter of pinyin of the several keywords of input point of interest to be retrieved, just can retrieve all associated points of interest.
In order to reach above purpose, the present invention includes following steps:
Step 1:, generate index file for first letter of pinyin retrieval usefulness with point of interest raw data file conversion packing; This index file is made of two groups of files, first group of concrete data of document storage index file, and data sort by first letter of pinyin in this document; Second group of file then is used for phonetic retrieval.
Step 2: interest point data is carried out phonetic retrieval.The initial of each Chinese character of input of character string at first, splitting each Chinese character initial of character string then is a plurality of initial keywords, by keyword first letter of pinyin retrieval to second group of file, obtain the recording mechanism collection of each initial keyword retrieval result in first group of file, recording mechanism collection to each initial keyword is got common factor, obtain the array of occuring simultaneously at last, obtain final result for retrieval by first group of data again.
Step 3: show result for retrieval.Described result for retrieval carried out paging and sequenced in proper order showing by the initial phonetic of point of interest, at the point of interest of browse displays as a result the time, the page turning demonstration that can also go up nextpage, Zi Mu page turning demonstration and initial locating and displaying up and down.
Step 4: the user finds required point of interest.
The structure of described index file is:
Wherein first group and second group of concrete institutional framework of file are:
1, Poi.inx (according to the initial Pinyin sorting)
| Field | Explanation |
| The navigation coordinate longitude | |
| The navigation coordinate latitude | |
| Reference position in data file | File refers to Poi.dat, must＞=0 |
| Type | |
| Title length word joint number | |
| The initial of first word of title |
2、Poi.dat
| Field | Explanation |
| Title |
3, Poi.cix (the quick indexing file of the initial of first word of title, ordering in alphabetical order)
| Field | Explanation |
| Home record number | It is the recording mechanism in the Poi.inx file.Have 26 line items, corresponding 26 English alphabets |
4, Spell.inx (26 * 26 records are arranged, put in order into: aa, ab, ac ..., ba, bb, bc ... zz)
| Field | Explanation |
| Reference position in the file | File refers to spell.dat |
5, Spell.dat (record under each keyword is all according to the recording mechanism ordering)
| Field | Explanation |
| Recording mechanism | Point to every record among the data file Poi.inx |
The method that described each Chinese character initial character string is split as a plurality of initial keywords is:
If being " (n-2) (n-3) (n-4) for n (n-1) ... (n-m) ", character string it is split as n (n-1), (n-1) (n-2), (n-2) (n-3), (n-3) (n-4) .. (n-m-1) is (n-m), promptly split adjacent two Chinese character initials successively, two is one group, then skips if meet the space.
The described specific implementation method that interest point data conversion packing is generated the index file of using for phonetic retrieval is:
(1) reads POI raw data and extracting for information about, the data based Chinese initial after extracting is sorted, leave an element number variable size in and deposit in the Dynamic Array of middle ephemeral data of index file;
The structure variable of each array element is in this Dynamic Array:
typedef?struct?tagPOIData
{ m_szName; // Chinese
M_szSpell; Each Chinese character initial character string of // Chinese
M_szAddr; // address
M_szTel; // telephone number
M_1Lon; // longitude
M_1Lat; // latitude
M_dwAdmCode; // administrative division code
}POIDATA，*PPOIDATA，FAR*LPPOIDATA；
(2) the middle ephemeral data that utilizes Dynamic Array to deposit index file generates first group of file;
(3) read each element in the Dynamic Array successively, m_szSpell field in each element is split as some groups, method for splitting is: be one group with adjacent two first letter of pinyin and split successively (n (n-1), (n-1) (n-2), (n-2) (n-3) ..., if meeting the space then skips), an index point among the corresponding Spell.inx of the every spelling sound initial that splits in order, the recording mechanism of m_szSpell correspondence is placed among the Spell.dat of this index point sensing, generates second group of file;
(4) adopt the mode of document memory mapping to preserve this two sets of document data successively, generate final index file.
Compare with desktop PC, hardware resource such as primary processor, data space is all very limited in the onboard navigation system, need handle the primary index data again, and the packed data redundancy improves retrieval rate.The file storage structure that the present invention adopts has been carried out the compression packing to the primary index file effectively, and the searching algorithm of employing has also improved retrieval rate.And each Chinese character initial character string that the present invention will import earlier is split as a plurality of initial keywords, and retrieves the recording mechanism collection of each keyword respectively, obtains final result for retrieval by the mode of getting common factor.Like this, only need the initial phonetic of a point of interest of input keyword wherein just can retrieve, and the sequencing of initial phonetic keyword input do not require, improved the accuracy of retrieving greatly, use more convenient and quick.
Description of drawings
Fig. 1 is interest point search processing flow chart among the present invention;
Fig. 2 presses the phonetic retrieval process flow diagram for point of interest among the present invention;
Fig. 3 is concrete operations process flow diagram of the present invention for the user uses.
Embodiment
As shown in Figure 1, retrieval process part of the present invention is finished by two steps:
Step 1:, generate the index file of using for phonetic retrieval with interest point data conversion packing.On the PC in early stage, the point of interest raw data file is changed packing according to specified format, generate index file for retrieval usefulness.
This index file is made of two groups of files, first group of concrete data of document storage index file, and data sort by first letter of pinyin in this document; Second group of file then is used for phonetic retrieval, and the key word first letter of pinyin retrieval by to second group of file obtains the sequence number of result for retrieval in first group of file, obtains final result for retrieval by first group of data again.
The structure of described index file is:
Wherein first group and second group of concrete institutional framework of file are:
1, Poi.inx (according to the initial Pinyin sorting)
| Field | Explanation |
| The navigation coordinate longitude | |
| The navigation coordinate latitude | |
| Reference position in data file | File refers to Poi.dat, must＞=0 |
| Type | |
| Title length word joint number | |
| The initial of first word of title |
2、Poi.dat
| Field | Explanation |
| Title |
3, Poi.cix (the quick indexing file of the initial of first word of title, ordering in alphabetical order)
| Field | Explanation |
| Home record number | It is the recording mechanism in the Poi.inx file.Have 26 line items, corresponding 26 English alphabets |
4, spell.inx (26 * 26 records are arranged, put in order into: aa, ab, ac ..., ba, bb, bc ... zz)
| Field | Explanation |
| Reference position in the file | File refers to spell.dat |
5, Spell.dat (record under each keyword is all according to the recording mechanism ordering)
| Field | Explanation |
| Recording mechanism | Point to every record among the data file Poi.inx |
With interest point data conversion packing, the specific implementation method that generates the index file of using for phonetic retrieval is:
(1) reads the POI raw data, reject information redundancy, extract for information about, utilize quick sorting algorithm that the data based Chinese initial after extracting is sorted, leave in the Dynamic Array of an element number variable size, this Dynamic Array is deposited the middle ephemeral data of index file.
For example a complete raw data (being provided by other producer) leaves in respectively in a and two files of b.
1. the data line form of depositing in a file is as follows:
Example: " refined fast network ", " YXWL ", " A ", " B ", " C " ...
N character string arranged in each line data, and relevant with first letter of pinyin retrieval have only preceding two character strings (Chinese and initial thereof), and retrieval belongs to information redundancy to other character string for first letter of pinyin.
2. the deposit data form of correspondence is as follows with it in the b file:
Example: Point X Y
Symbol(A，B，C)
With longitude and latitude data X, the Y of this point of interest of first letter of pinyin retrieval relevant having only " refined fast network ", retrieval belongs to information redundancy to other data for first letter of pinyin.
The design of the structure variable of each array element is as follows in this Dynamic Array:
typedef?struct?tagPOIData
{ m_szName; // Chinese
M_szSpell; Each Chinese character initial character string of // Chinese
M_szAddr; // address
M_szTel; // telephone number
M_1Lon; // longitude
M_1Lat; // latitude
M_dwAdmCode; // administrative division code
}POIDATA，*PPOIDATA，FAR*LPPOIDATA；
(2) the middle ephemeral data that utilizes Dynamic Array to deposit index file generates first group of file.
(3) read each element in the Dynamic Array successively, m_szSpell field in each element is split as some groups, method for splitting is: split adjacent two Chinese character initials successively, two is one group, then skip if meet the space, promptly n (n-1), (n-1) (n-2), (n-2) (n-3) ... (n-m-1) (n-m); An index point among the corresponding Spell.inx of the every spelling sound initial that splits in order is placed on the recording mechanism of m_szSpell correspondence among the Spell.dat of this index point sensing, generates second group of file;
(4) adopt the mode of document memory mapping to preserve this two sets of document data successively, generate final index file.
Step 2: interest point data is carried out phonetic retrieval.The user is in networking vehicle mounted guidance equipment, and by destination retrieval module in the independent navigation program, the destination retrieval mode according to different reads relevant information from index file, use in navigation for the user.
Phonetic retrieval step of the present invention as shown in Figure 2, the initial of each Chinese character of input of character string at first, splitting each Chinese character initial of character string then is a plurality of initial keywords, in Spell.dat, read the recording mechanism collection of each initial keyword by Spell.inx, recording mechanism collection to each initial keyword is got common factor, obtain the array of occuring simultaneously at last,, in Poi.inx and Poi.dat, take out corresponding retrieval results according to the recording mechanism in the common factor array.
The method that described each Chinese character initial character string is split as a plurality of initial keywords is:
If being " (n-2) (n-3) (n-4) for n (n-1) ... (n-m) ", character string it is split as n (n-1), (n-1) (n-2), (n-2) (n-3), (n-3) (n-4) .. (n-m-1) is (n-m), promptly split adjacent two Chinese character initials successively, two is one group, then skips if meet the space.
Step 3: show result for retrieval.Described result for retrieval carried out paging and sequenced order by the initial phonetic of point of interest (ascending order is arranged, a-z) show, at the point of interest of browse displays as a result the time, the page turning that can also go up nextpage shows, up and down Zi Mu page turning demonstration and initial locating and displaying.
Step 4: the user finds required point of interest.
The invention provides the specific embodiment of point of interest in a kind of networking vehicle mounted guidance equipment by the method for first letter of pinyin retrieval.Navigator on the vehicle is made up of navigation terminal and display screen, and navigation terminal has satellite positioning module, wireless communication module, message processing module, and navigation terminal is connected with display screen by connecting line.Digital navigation map leaves on the navigation terminal and shows by display screen, and user (driver) only needs directly to operate on display screen to get final product; Has up-to-date electronic chart on the navigation terminal among this embodiment, the relative index file that up-to-date point of interest initial phonetic retrieval is required and data file and up-to-date Navigator.
When vehicle needs navigation, when the user wants to come the setting navigation destination by initial phonetic retrieval point of interest, can be introduced into the interface of phonetic retrieval, input Pinyin keyword on this interface, and determine to get final product; Program is searched relevant index file and data file according to the phonetic keyword of input then; Search finish after, will show the result for retrieval interface, on this interface, browse the point of interest that has shown, select required one.
Suppose: the user thinks searching interest point " seascape hotel parking lot " (initial phonetic is HJDJDTCC).
A. import keyword example one (single keyword initial):
The initial phonetic " TCC " of input keyword " parking lot ";
The fractionation character string is: " TC, CC ";
Search " TC, CC " corresponding point of interest;
Show " TC, CC " the corresponding point of interest that finds;
Browse the point of interest that has shown, find point of interest " seascape hotel parking lot ", the mode of browsing can adopt nextpage page turning, initial page turning demonstration up and down, initial locating and displaying.
B. import keyword example two (a plurality of keyword initial):
The initial phonetic " TCC " of input keyword " parking lot ", the initial phonetic " HJ " of keyword " seascape ", the initial phonetic " JD " of keyword " hotel " is separated with space character between each keyword;
Search " TC, CC, CH, HJ, JJ, JD " corresponding point of interest;
Show " TC, CC, CH, HJ, JJ, JD " the corresponding point of interest that finds,, can show, so directly just can find point of interest " seascape hotel parking lot " with one page because the related interests point that finds is less.
Claims (4)
1. point of interest is pressed the method for first letter of pinyin retrieval in the networking vehicle mounted guidance equipment, may further comprise the steps:
Step 1:, generate the index file of using for phonetic retrieval with interest point data conversion packing; On the PC in early stage, the point of interest raw data file is changed packing according to specified format, generate index file for retrieval usefulness; This index file is made of two groups of files, first group of concrete data of document storage index file, and data sort by first letter of pinyin in this document; Second group of file then is used for phonetic retrieval;
Step 2: interest point data is carried out phonetic retrieval; The initial of each Chinese character of input of character string at first, splitting each Chinese character initial of character string then is a plurality of initial keywords, by keyword first letter of pinyin retrieval to second group of file, obtain the recording mechanism collection of each initial keyword retrieval result in first group of file, recording mechanism collection to each initial keyword is got common factor, obtain the array of occuring simultaneously at last, obtain final result for retrieval by first group of data again;
Step 3: show result for retrieval; Described result for retrieval carried out paging and sequenced in proper order showing by the initial phonetic of point of interest, at the point of interest of browse displays as a result the time, the page turning demonstration that can go up nextpage, Zi Mu page turning demonstration and initial locating and displaying up and down;
Step 4: the user finds required point of interest.
2. point of interest is pressed the method for first letter of pinyin retrieval in a kind of networking vehicle mounted guidance equipment according to claim 1, and it is characterized in that: the structure of described index file is:
This first group and second group of concrete institutional framework of file are:
(1), Poi.inx: according to first letter female Pinyin sorting
(2)、Poi.dat
(3), Poi.cix: the quick indexing file of the initial of first word of title, ordering in alphabetical order
(4), Spell.inx: 26x26 bar record is arranged, put in order into: aa, ab, ac ..., ba, bb, bc ... zz
(5), Spell.dat: the record under each keyword, sort according to recording mechanism
3. point of interest is pressed the method for first letter of pinyin retrieval in a kind of networking vehicle mounted guidance equipment according to claim 1, it is characterized in that: the method that described each Chinese character initial character string is split as a plurality of initial keywords is: if character string is split as n (n-1) for " (n-2) (n-3) (n-4) for n (n-1) ... (n-m) " with it, (n-1) (n-2), (n-2) (n-3), (n-3) (n-4) ... (n-m-1) (n-m), promptly split adjacent two Chinese character initials successively, two is one group, then skips if meet the space.
4. press the method for first letter of pinyin retrieval according to point of interest in claim 2 or the 3 described a kind of networking vehicle mounted guidance equipment, it is characterized in that: the described specific implementation method that interest point data conversion packing is generated the index file of using for phonetic retrieval is:
(1), read the POI raw data and extract for information about, the data after extracting are sorted by the Chinese initial, leave an element number variable size in and deposit in the Dynamic Array of middle ephemeral data of index file;
The structure variable of each array element is in this Dynamic Array:
typedef?struct?tagPOIData
{ m_szName; // Chinese
M_szSpell; Each Chinese character initial character string of // Chinese
M_szAddr; // address
M_szTel; // telephone number
M-lLon; // longitude
M_lLat; // latitude
M_dwAdmCode; // administrative division code
}POIDATA，*PPOIDATA，FAR*LPPOIDATA；
(2), the middle ephemeral data that utilizes Dynamic Array to deposit index file generates first group of file;
(3), read each element in the Dynamic Array successively, m_szSpell field in each element is split as some groups, method for splitting is: split adjacent two Chinese character initials successively, two is one group, then skip if meet the space, promptly n (n-1), (n-1) (n-2), (n-2) (n-3) ... (n-m-1) (n-m); An index point among the corresponding Spell.inx of the every spelling sound initial that splits in order is placed on the recording mechanism of m_szSpell correspondence among the Spell.dat of this index point sensing, generates second group of file;
(4), adopt the mode of document memory mapping to preserve this two sets of document data successively, generate final index file.
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