CN101350013A - Method and system for searching geographical information - Google Patents
Method and system for searching geographical information Download PDFInfo
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- CN101350013A CN101350013A CNA2007101192210A CN200710119221A CN101350013A CN 101350013 A CN101350013 A CN 101350013A CN A2007101192210 A CNA2007101192210 A CN A2007101192210A CN 200710119221 A CN200710119221 A CN 200710119221A CN 101350013 A CN101350013 A CN 101350013A
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Abstract
The invention provides a method and a system for searching geographic information. The method can comprise: receiving inquiry request information, segmenting the inquiry request information, obtaining an effective address and key words, inquiring a prearranged database, obtaining spatial geometric information of the effective address, determining spatial regions which need searching according to the spatial geometric information, searching according to the key words in the spatial regions which need searching, and outputting a searching result. The invention organically combines spatial index and full-text searching, and can effectively improve the accuracy and the rich degree of geographic information searching.
Description
Technical field
The present invention relates to the information search field, particularly relate to a kind of searching method and system of geography information.
Background technology
Along with popularizing of internet and developing rapidly of infotech, people are increasing to the dependence of various information, particularly geography information.According to statistics, the activity of people more than 80% now all follows the locus relevant, therefore, how accurately, promptly to find the information that oneself needs from the geographic information data of magnanimity, becomes the current problem that presses for solution.
At present, all there are many companies to release the map search service both at home and abroad, for example, Google company and Baidu company or the like; But these search engine great majority all are based on global search technology and realize, promptly can only be according to literal title fuzzy matching in database of user's input, search for corresponding atural object.For example, user input query speech " Beijing's HaiLong Building ", then obtain having comprised in the Search Results matching result that has comprised " Beijing " and " HaiLong Building " in all atural object titles in database or the specific address information, and the particular geographic location that wherein has two results to mark on map is very far away from the geographic coordinate of real " HaiLong Building ", does not obviously meet user's retrieval requirement; But owing in its address information the printed words of " HaiLong Building " are arranged, thus appeared in the search result list, and it is forward to sort.
So, a technical matters that presses for those skilled in the art's solution is exactly: propose a kind of geographic information searching method of innovation, can effectively improve the accuracy of geography information search, satisfy the more search need of people.
Summary of the invention
Technical matters to be solved by this invention provides a kind of geographic information searching method and system, can effectively improve the accuracy of geography information search, satisfies the more search need of people.
In order to address the above problem, the invention discloses a kind of searching method of geography information, comprising: receive query requests information; Query requests information is carried out participle, obtain effective address and keyword; Inquire about initialized data base, obtain the space geometry information of this effective address; Determine area of space to be searched according to described space geometry information; In described area of space to be searched, search for this keyword; The output Search Results.
Preferably, can finish the participle process by following steps: dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary; Participle obtains the non-address entry in the query requests information, with the non-address entry in the word segmentation result as keyword.
Further, when word segmentation result comprises at least two address entries, can also comprise: judge whether former and later two address entries meet the father and son's rank relation that presets in the word segmentation result, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.Preferably, also comprise: the address entry is inquired about in the atural object database that presets,, then be defined as effective address if can mate fully.
Preferably, can finish search in described area of space to be searched: calculate by longitude and latitude, set up the grid in the four fork index of space and the incidence relation of described area of space to be searched by following steps; In the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object.
Further, described method can also comprise: first identification number of the atural object that Search Results is related in the atural object database is converted to second identification number, exports to the user as the part of Search Results.
Another aspect, the present invention also provides a kind of searching method of geography information, comprising: receive query requests information; Dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary; Inquire about initialized data base, obtain the space geometry information of this effective address; Determine area of space to be searched according to described space geometry information; In described area of space to be searched, search for; The output Search Results.
Preferably, when word segmentation result comprises at least two address entries, also comprise: judge whether former and later two address entries meet the father and son's rank relation that presets in the word segmentation result, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.
Further, the logical following steps of can crossing are finished search in described area of space to be searched: calculate by longitude and latitude, set up the grid in the four fork index of space and the incidence relation of described area of space to be searched; In the atural object that corresponding grid comprised, retrieve, obtain target atural object.
Further, described method can also comprise: first identification number of the atural object that Search Results is related in the atural object database is converted to second identification number, exports to the user as the part of Search Results.
According to a further aspect of the invention, also provide a kind of search system of geography information, having comprised:
Receiver is used to receive query requests information;
The participle device is used for query requests information is carried out participle, obtains effective address and keyword;
The geological information acquisition module is used to inquire about initialized data base, obtains the space geometry information of this effective address;
The region of search determination module is used for determining area of space to be searched according to described space geometry information;
Searcher is used for searching for this keyword in described area of space to be searched;
Follower is used to export Search Results as a result.
Preferably, described participle device may further include: the address word-dividing mode, and being used for dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary; Common word-dividing mode is used for the non-address entry that participle obtains query requests information, with the non-address entry in the word segmentation result as keyword.
Further, when word segmentation result comprised at least two address entries, described participle device also comprised: father and son's rank judge module is used for judging whether former and later two address entries of word segmentation result meet the father and son's rank relation that presets, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.
Preferably, described system can also comprise: address entry matching module, be used for the address entry is inquired about at the atural object database that presets, and if can mate fully, then be defined as effective address.
Preferably, described searcher further comprises: relating module, be used for calculating by longitude and latitude, and set up the grid in the four fork index of space and the incidence relation of described area of space to be searched; The keyword search module is used for the atural object that comprises at corresponding grid, retrieves with described keyword, obtains target atural object.
Preferably, described system can also comprise: the sign modular converter, and be used for the atural object that Search Results is related and be converted to second identification number at first identification number of atural object database, export to the user as the part of Search Results.
According to another embodiment of the present invention, a kind of search system of geography information is disclosed, comprising:
Receiver is used to receive query requests information;
Address participle device, being used for dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
The geological information acquisition module is used to inquire about initialized data base, obtains the space geometry information of this effective address;
The region of search determination module is used for determining area of space to be searched according to described space geometry information;
Searcher is used for searching in described area of space to be searched;
Follower is used to export Search Results as a result.
Preferably, when word segmentation result comprised at least two address entries, described participle device also comprised: father and son's rank judge module is used for judging whether former and later two address entries of word segmentation result meet the father and son's rank relation that presets, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.
Preferably, described searcher further comprises: relating module, be used for calculating by longitude and latitude, and set up the grid in the four fork index of space and the incidence relation of described area of space to be searched; Search module, the atural object that is used for comprising at corresponding grid is retrieved, and obtains target atural object.
The present invention is the searching method of claimed a kind of geography information also, comprising: the coordinate input or the zone on map that receive the user are selected, and determine the zone to be searched that the user is required; Receive searching keyword; Calculate by longitude and latitude, set up the grid in the four fork index of space and the incidence relation in described zone to be searched; In the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object; The output Search Results.
Compared with prior art, the present invention has the following advantages:
Geographic information searching method of the present invention and system can effectively improve the accuracy that geography information is searched for, and satisfy more, the deeper search need of people.For example, can specify by the user, selected or determine a coordinates regional scope, just can realize atural object search by input coordinate; Perhaps, also can be by user's Input Address entry, technology of the present invention can be converted into geographic coordinate with geographical term by the identification to the address entry, remakes corresponding keyword search then and handle in determined zone.
Description of drawings
Fig. 1 is the flow chart of steps of the method embodiment 1 of a kind of geography information search of the present invention;
Fig. 2 is the flow chart of steps of the method embodiment 2 of a kind of geography information search of the present invention;
Fig. 3 is the structured flowchart of the system embodiment 3 of a kind of geography information search of the present invention;
Fig. 4 is the structured flowchart of the system embodiment 4 of a kind of geography information search of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
The present invention can be used in numerous general or special purpose computingasystem environment or the configuration.For example: personal computer, server computer, handheld device or portable set, plate equipment, multicomputer system, the system based on microprocessor, set top box, programmable consumer-elcetronics devices, network PC, small-size computer, mainframe computer, comprise distributed computing environment of above any system or equipment or the like.
The present invention can describe in the general context of the computer executable instructions of being carried out by computing machine, for example program module.Usually, program module comprises the routine carrying out particular task or realize particular abstract, program, object, assembly, data structure or the like.Also can in distributed computing environment, put into practice the present invention, in these distributed computing environment, by by communication network connected teleprocessing equipment execute the task.In distributed computing environment, program module can be arranged in the local and remote computer-readable storage medium that comprises memory device.
Geography information search of the present invention can be applied to the framework of client-server, also can be applied to local search.
With reference to Fig. 1, show the method embodiment 1 of a kind of geography information search of the present invention, specifically can comprise:
Below Chinese words segmentation is simply introduced.
As everyone knows, English is unit with the speech, be to separate by the space between speech and the speech, and Chinese is to be unit with the word, and all words link up and could describe a meaning in the sentence.For example, english sentence I am astudent with Chinese then is: " I am a student ".Computing machine can very simply know that by the space student is a word, but can not be readily understood that " ", " life " two words just represent a speech altogether.The Chinese character sequence of Chinese is cut into significant speech, is exactly Chinese word segmentation.For example, I am a student, and the result of participle is: I am a student.Introduce some segmenting methods commonly used below:
1, based on the segmenting method of string matching: be meant according to certain strategy the entry in Chinese character string to be analyzed and the machine dictionary that presets is mated that if find certain character string in dictionary, then the match is successful (identifying a speech).The actual Words partition system that uses, all be mechanical Chinese word segmentation as a kind of branch means just, also need further improve the accuracy rate of cutting by utilizing various other language messages.
2, based on the segmenting method of mark scanning or sign cutting: be meant preferential identification and be syncopated as the speech that some have obvious characteristic in character string to be analyzed, with these speech as breakpoint, former character string can be divided into less string and advance mechanical Chinese word segmentation again, thereby reduce the error rate of mating; Perhaps participle and part-of-speech tagging are combined, utilize abundant grammatical category information that participle is made a strategic decision and offer help, and in the mark process, conversely word segmentation result is tested, adjusted again, thereby improve the accuracy rate of cutting.
3, based on the segmenting method of understanding: be meant by allowing the understanding of anthropomorphic distich of computer mould, reach the effect of identification speech.Its basic thought is exactly to carry out sentence structure, semantic analysis in participle, utilizes syntactic information and semantic information to handle the ambiguity phenomenon.It generally includes three parts: participle subsystem, syntactic-semantic subsystem, master control part.Under the coordination of master control part, the participle subsystem can obtain the sentence structure and the semantic information of relevant speech, sentence etc. and come the participle ambiguity is judged that promptly it has simulated the understanding process of people to sentence.This segmenting method need use a large amount of linguistries and information.
4, based on the segmenting method of adding up: be meant, the confidence level that can reflect into speech preferably owing to word and the frequency or the probability of the adjacent co-occurrence of word in the Chinese information, so can add up to the frequency of the combination of each word of adjacent co-occurrence in the language material, calculate their information that appears alternatively, and the adjacent co-occurrence probabilities that calculate two Chinese character X, Y.The information of appearing alternatively can embody the tightness degree of marriage relation between the Chinese character.When tightness degree is higher than some threshold values, can think that just this word group may constitute a speech.This method only needs the word group frequency in the language material is added up, and does not need the cutting dictionary.
For the present invention, because the address entry is generally all more special, therefore, main employing is preset with reference to the mode of dictionary and is carried out, and generally can divide in described address and preset a plurality of normal addresses of storage entry in the dictionary.For example, divide in the address and to store a normal address entry in the dictionary in advance---" software centre, Zhong Guan-cun ", then, can from query requests information " No. 5 building, software centre, Zhong Guan-cun ", identify an address key element " software centre, Zhong Guan-cun " according to the matching relationship of the two.
For the common entry in the query requests information, then can from aforesaid the whole bag of tricks, select for use or be used in combination, preferred, can divide in the address and preset the standard entry that is used for common participle in the dictionary
General, the entry in the word segmentation result that finally obtains except the entry of address just can be thought keyword.For example, word segmentation result is: " Jianguomenwai Dajie+dining room ", then the address entry is " Jianguomenwai Dajie ", keyword is " dining room ".If there is not further optimization step, can determine that then this address entry " Jianguomenwai Dajie " is effective address of the present invention.
Preferably, in order to ensure this address accurately or correct, then present embodiment can also comprise some screening steps at the address entry, just can be defined as effective address through the address entry of screening and enter next step.
Screening mode 1.When word segmentation result comprised at least two address entries, the screening step that can also comprise was: judge whether former and later two address entries meet the father and son's rank relation that presets in the word segmentation result, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.Certainly, described father and son's rank relation also can be stored in other databases, and being stored in only that described address divides in the dictionary is a kind of simple implementation.
Adopt the screening step of above-mentioned father and son's rank relation, can remove some wrong word segmentation result or wrong query requests, the Search Results of avoiding obtaining is wrong, has also wasted computational resource.For example, the word segmentation result that obtains is " Beijing+Haidian District+Asian Games Village+Hua Tang market ", and wherein " Hua Tang market " is keyword, other be the address entry; By judging father and son's rank relation, find that address entry " Asian Games Village " and its higher level address entry " Haidian District " do not meet father and son's rank relation, because " Asian Games Village " in the reality belongs to " Chaoyang District ", therefore, can not determine to be " Beijing+Haidian District+Asian Games Village " effective address.
Screening mode 2.When the address of word segmentation result entry can be unique coupling, when not having problem of the same name, can determine that then this address entry is an effective address, for example, word segmentation result is " Beijing+HaiLong Building ", then, be effective address so can determine " Beijing+HaiLong Building " because HaiLong Building only just has in Beijing.Preferably, can directly divide in the dictionary storage " HaiLong Building " corresponding latitude and longitude information, the space geometry information (being completing steps 103) of dividing dictionary to obtain " HaiLong Building " by inquire address in the address.
When certain address entry all exists in a plurality of areas, for example " Nanjing Road " has in Shanghai and Guangzhou, then divide and only store one " Nanjing Road " entry in the dictionary and get final product in the address, and can not store two " Nanjing Road " entries, because the address divide the main effect of dictionary be when participle as the reference dictionary, and generally do not need to do therein further calculating.Therefore, at this moment, just can not determine that " Shanghai City+Nanjing Road " is effective address, in order to determine effective address, then needs further to mate calculating in the atural object database, because all store a record at each atural object in the atural object database.
Screening mode 3.Because under situation of the same name, still need arrive in the atural object database in the mode 2 and mate calculating, so the manner directly at word segmentation result (for example, " Shanghai City+Nanjing Road "), in the atural object database, mate calculating, if find on all four atural object record, then determine that it is an effective address.For example,, in the atural object database, just can not find on all four atural object record, can not determine that then it is an effective address for " Beijing+Nanjing Road ".
The present invention is not limited to above-mentioned several screening modes, only is used to illustrate thought of the present invention.
When can not determine that the address entry is effective address, multiple processing mode can be arranged: the one, directly return error message; The 2nd, according to data-base recording the raw address entry is proofreaied and correct, return Search Results according to the effective address after proofreading and correct then; The 3rd, return a plurality of possible effective addresses according to data-base recording, please the user manually select.And in fact, according to the needs of state of trade, those skilled in the art can also design other feasible processing modes, can not describe one by one in this present invention.
By above-mentioned description, be easy to learn to the screening step: a kind of situation, can divide dictionary by inquire address, obtain corresponding space geometry information; Another kind of situation can obtain corresponding space geometry information by inquiry atural object database.For " HaiLong Building " this class point record, its space geometry information can be the latitude and longitude information of point, and for " street, Zhong Guan-cun " such line write down, then its space geometry information can be the longitude and latitude point set of road.
In one embodiment, can pass through presetting rule, determine area of space to be searched.For example, if point coordinate, area of space then to be searched is the border circular areas that radius forms for being the center with this point coordinate with 500 meters; If the set of point coordinate, area of space then to be searched is an axis for the line that the set with described point coordinate forms, respectively the polygonal region that forms to the both sides expansion.
In another embodiment, then can provide the interface, manually determine by the user.
Space search generally can be realized by the mode of setting up spatial index, spatial index is meant when the storage space data according to the position of spatial object and certain spatial relationship between shape or the spatial object, a kind of data structure of Pai Lieing in certain sequence wherein comprises the pointer etc. of sign, boundary rectangle and the pointing space object entity of the summary info of spatial object such as object.Indexed mode commonly used has the graticule mesh index among the GIS at present, R tree index, quaternary tree index etc.By the screening effect of spatial index, can get rid of a large amount of rapidly and the irrelevant spatial object of particular space operation, thereby improve the speed and the efficient of spatial operation.
For example, according to " software centre, Zhong Guan-cun " pairing geographic coordinate zone, from the quaternary tree index, obtain the memory location of all related atural objects, carry out search matched according to the relevant position of keyword (atural object title, for example " Chinese king mansion ") in the atural object basic database then.The atural object basic database is used for storing atural object title and various attribute information thereof.In fact, the coupling in the atural object basic database is exactly a kind of global search technology, for example, the atural object that comprises keyword in atural object title or the atural object attribute information all can be exported as Search Results.
With the quaternary tree index is example, and the thought of quaternary tree index is exactly that total size with all key elements is divided into 2 * 2 grid, analyzes each grid as long as the key element number in this grid is just further cut apart this grid greater than setting, and promptly Shu the degree of depth adds 1.The quaternary tree shortcoming is to be that the level of cutting apart of quaternary tree may be very dark, but be very suitable just for map when the widely different or essential factors space skewness of each figure range size of key element.Suppose quaternary tree index at the whole map foundation of China, then the top layer grid is exactly this big regional equalization of China to be divided into the macrolattice of some (such as each macrolattice can be 6 longitudes, 5 latitudes), four fork grids then are the multipole four fork segmentations of carrying out under each macrolattice.
General, adopt under the situation of Spatial Data Index Technology, can finish search in described area of space to be searched by following steps:
Step a, calculate, set up the grid in the four fork index of space and the incidence relation of described area of space to be searched by longitude and latitude;
Step b, in the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object.
Under the simple situation, can retrieve with described keyword in the atural object set that grid comprised, the scope of the Search Results that provide this moment can be more wide in range a little, but efficient can be higher.Certainly, the atural object set that also can further calculate described area of space to be searched and comprised is to satisfy more accurate searching requirement.
Geography information Search Results of the present invention can be showed by the mode of textual list, perhaps also can show by illustrated mode, and the present invention does not need the exhibition method of Search Results is limited.Geography information Search Results of the present invention can offer personal computer terminal, also can offer various mobile computing devices, certainly, because agreement or data layout difference that different equipment is used then need Search Results is converted to corresponding format.For example, the XML form according to certain sends to portable terminal with the Search Results character set.
Described Search Results can be various atural object titles, corresponding starting point of perhaps various atural objects and terminal point coordinate.Certainly, described Search Results can also comprise the part attribute information of this atural object.
If the user wishes to carry out detail knowledge at certain atural object in the Search Results, then can click this atural object, the atural object database that inquiry is preset obtains the relevant attribute information of this atural object.Certainly, connect the foundation that the atural object database preset inquires about and to be the identification number of this atural object.
In order to prevent that concrete atural object data message from being grasped from network by malice, preferred, first identification number of the atural object that Search Results is related in the atural object database is converted to second identification number, exports to the user as the part of Search Results.The user is by second identification number after changing, to the more detailed information of atural object Database Requirements of server end.Wherein, the mode that first identification number is converted to second identification number can be varied, for example, with first identification number by cryptographic algorithm in combination name claim, attribute such as type, be converted to the identification number of ciphertext; Perhaps, directly change or the like according to special algorithm.
Preferably, embodiment 1 can also comprise the Search Results filtration step, is used for filtering according to certain presetting rule at the search result set that obtains.For example, filter the not Search Results in required area of space (for example, the distance that does not belong to required administrative division or decentering point surpasses threshold value) of actual geographic position; Perhaps, filter the atural object classification and obviously do not meet Search Results of query demand or the like.Certainly, according to actual needs, those skilled in the art can also propose other filtering policy, and the present invention does not need this is limited.
Further, embodiment 1 can also comprise the sort result step, is used for meeting at search result set the optimization sorting of user's ordinary practice.For example, according to matching degree series arrangement Search Results from high to low; According to the ascending series arrangement Search Results of the distance of decentering point; Perhaps according to the rank series arrangement Search Results of atural object (for example, in certain zone, searching for the dining room) then according to the star series arrangement; Perhaps the use habit according to certain user provides personalized ordering or the like.The present invention also need not to limit to concrete ordering rule.
In the superincumbent description, the invention provides a kind of elder generation and determine some zones by space search, in this zone, carry out the geographic information searching method embodiment of keyword full-text search then, following the present invention provides geographic information searching method embodiment in another again, is mainly used in the situation of space search.
With reference to Fig. 2, show geographic information searching method embodiment 2, specifically can comprise:
Further, when word segmentation result comprises at least two address entries, can also comprise: judge whether former and later two address entries meet the father and son's rank relation that presets in the word segmentation result, if then be defined as effective address;
The key distinction of embodiment 2 and embodiment 1 is, only need can be applied under the situation of space search, and for example, the user wishes to know the particular geographic location and the peripheral atural object situation of " fragrant grass ground West St ", and then Application Example 2 is more suitable.Certainly, in fact, embodiment 2 can be regarded as the special circumstances of embodiment 1, and promptly keyword is exactly embodiment 2 for empty situation among the embodiment 1, so these two identical or similarities of embodiment have just repeated no more.
Embodiment 2 carries out the specific strategy of space search and the Search Results that returns and embodiment 1 can be different, is different user's requests because it satisfies.For example, the effective address that obtains behind the participle is " fragrant grass ground West St ", the Search Results that then returns can comprise: this road (can adopt the mode of data set from the latitude and longitude information of origin-to-destination, also can adopt the mode that on map, highlights), at the introduction of this road, all atural objects in these road some characteristic atural objects of periphery and attribute information thereof or the certain zone of this road periphery and attribute information thereof or the like.
Another embodiment of the present invention is that at first, the coordinate input or the zone on map that receive the user are selected, and determine the zone to be searched that the user is required; And, receive searching keyword; Then, calculate, set up the grid in the four fork index of space and the incidence relation in described zone to be searched by longitude and latitude; And, in the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object; Export search result corresponding at last.This embodiment can satisfy certain user's specific demand, for example, the user with draw frame select a rectangle (coordinate range is: RECT (116123453912345,117123454012345)), searching key word in this zone then.
With reference to Fig. 3, show a kind of search system embodiment 3 of geography information, embodiment 3 specifically can comprise corresponding to embodiment 1:
Geological information acquisition module 303 is used to inquire about initialized data base, obtains the space geometry information of this effective address;
Region of search determination module 304 is used for determining area of space to be searched according to described space geometry information;
Preferably, described participle device 302 further comprises:
The address word-dividing mode, being used for dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
Common word-dividing mode is used for the non-address entry that participle obtains query requests information, with the non-address entry in the word segmentation result as keyword.For the concrete participle technique that common word-dividing mode adopted, the present invention does not need to limit.
Further, when word segmentation result comprised at least two address entries, described participle device 302 can also comprise: father and son's rank judge module is used for judging whether former and later two address entries of word segmentation result meet the father and son's rank relation that presets, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary.
A kind of preferred implementation is: divide in the dictionary both storage standards address entries in the address, also comprise the common entry of standard.At the normal address entry can corresponding a plurality of fields information, for example, comprise title, address rank, position, father address sequence number, latitude and longitude information, city ID number, alias address position number of normal address entry or the like.Wherein, the address rank can be used for determining that this address key element is zone (face), road (line) or particular location (point); City ID number and position, father address sequence number can be used for judging whether father and son's rank relation is correct.
Do not exist under the situation of the same name at the address entry, can directly be defined as effective address, divide from the address and obtain corresponding space geometry information the dictionary, for example, latitude and longitude information field etc.Preferably, when of the same name, be difficult to simply determine the situation of effective address for fear of the address, then further, present embodiment can also comprise: address entry matching module is used for the address entry is inquired about at the atural object database that presets, if can mate fully, then be defined as effective address.The atural object database is used to store each atural object and corresponding attribute information thereof, and for example, the storage of atural object data adopts the XML character string mode of fixing each field index (starting point and the length that comprise this field value) and compression to store; It comprises point, the structured storage of the geodata of line, face, and the field of storage can comprise: atural object title, address, phone, longitude and latitude, space geometry information etc.
Described combinatorial search device 305 can adopt the technology of various space searchs to realize, in a preferred embodiment of the invention, described combinatorial search device adopts the mode of spatial index to realize.At this moment, described combinatorial search device 305 further can comprise: relating module, be used for calculating by longitude and latitude, and set up the grid in the four fork index of space and the incidence relation of described area of space to be searched; The keyword search module is used for the atural object that comprises at corresponding grid, retrieves with described keyword, obtains target atural object.
The groundwork that combinatorial search device 305 is finished is exactly by space search, determines atural object data acquisition to be searched, finishes keyword search in this scope by the full-text search technology then.
Further, for maintaining secrecy to the atural object basic data, present embodiment may further include: the sign modular converter, and be used for the atural object that Search Results is related and be converted to second identification number at first identification number of atural object database, export to the user as the part of Search Results.
For concrete keyword search process, can adopt the technology of various full-text search to realize, in a preferred embodiment of the invention, the keyword search module may further include: the inverse Polan expression maker, can carry out inverse Polan expression to the word after splitting through the participle device and generate, carry out logical operation for logic combiner; The word matched device can carry out inverted index and search to each word in the word, and the combination of the inverted index of each word, obtains the inverted index set of word; Logic combiner can be done logical operation by operational symbol to the inverted index set of each word.The relation of these intermodules can for: after the phrase data of coming from the participle device are handled through the inverse Polan expression maker, form the computation rule of an expression formula, by this rule, logic combiner will be by the Query Result behind each phrase process word matched device, carry out logical combination in twos, and form final result set.
Below inverted index is simply introduced:
Inverted index is a kind of index mechanism towards word, the speed when utilizing it can improve retrieval.Generally, the inverted index structure is made up of " dictionary " and " situation occurring " two parts.For each word, the position that all can have a word lists record word in all documents, to occur, these positions can be that the position (which word in the text) of word also can be the position (which character in the text) of character.That is to say that what the inverted index technology was set up is the mapping relations of " word is to document ".
Need to prove,, can also be used for the attribute search, for example, after various approach are collected the atural object basic data, atural objects such as having " cuisines, dining room, restaurant, snack " in the title is belonged to Attribute class: diet the keyword search process; Then when keywords such as user search " have a meal, dining room, cuisines ", the atural object that can return the diet Attribute class is as Search Results, rather than machinery to return the atural object that contains same keyword in the title be Search Results, thereby better meet user's search need.
Further, the foregoing description can also comprise: be used for the filtrator that filters according to prerequisite at search result set; And, be optimized the sorting unit of ordering according to presetting rule at search result set.
With reference to Fig. 4, show a kind of search system embodiment 4 of geography information, embodiment 4 only need can be applied under the situation of space search, and this system specifically can comprise:
Preferably, when word segmentation result comprised at least two address entries, described participle device also comprised: father and son's rank judge module is used for judging whether former and later two address entries of word segmentation result meet the father and son's rank relation that presets, if then be defined as effective address; Described father and son's rank relation is stored in described address and divides in the dictionary;
Geological information acquisition module 403 is used to inquire about initialized data base, obtains the space geometry information of this effective address;
Region of search determination module 404 is used for determining area of space to be searched according to described space geometry information;
In the process of practical application, geography information search system of the present invention can also comprise: the parametric solution parser, be used for the parameter that the outside is transmitted is resolved, and obtain required original address information.Other parameters such as page display parameter that may comprise matching result in the described external parameter.Such as: start (start page), pagecap (every page bar number) etc.
Following correspondence is simply introduced at the execution flow process of one query request with the foregoing description:
1, terminal sends query requests to service end;
2, service end is noted inquiry log through the processing of apache, starts searching process;
3, by the parametric solution parser parameter character that receives is resolved, extract each parameter value, for example: information such as original query information, phone, match pattern, paging;
4, at original query information, utilize the address to divide dictionary to carry out participle, obtain word segmentation result;
5,, carry out following operation respectively according to word segmentation result:
If A has only effective address, then directly carry out space search;
If B has only keyword, then directly carry out full-text search;
If C comprises effective address and keyword, then earlier determine zone to be searched by space search, in this regional extent, carry out full-text search then;
If 6 have filtercondition, then call filtrator carries out various conditions to search result set filtration;
7, sorting unit is then called in ordering if desired, and search result set is optimized ordering;
8,,, make up the XML character string and return terminal according to required parameter at the final search result collection.
Server wherein can adopt the Apache http server, and such server is the program an of modularization (or saying brick pattern), and the keeper can select some modules to increase some function of server.These modules can be compiled in the binary code of http server when creating server program statically, also can be compiled into Dynamic Shared Objects (DSO) file that some are independent of server program.Wherein, the DSO file can be created when the compiler server program, also can utilize Apache expander tool APXS to create separately afterwards.
Each embodiment in this instructions all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For system embodiment, because it is similar substantially to method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
More than to the method and system of a kind of geography information search provided by the present invention, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (11)
1, a kind of searching method of geography information is characterized in that, comprising:
Receive query requests information;
Query requests information is carried out participle, obtain effective address and keyword;
Inquire about initialized data base, obtain the space geometry information of this effective address;
Determine area of space to be searched according to described space geometry information;
In described area of space to be searched, search for this keyword;
The output Search Results.
2, the method for claim 1 is characterized in that, finishes the participle process by following steps:
Dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
Participle obtains the non-address entry in the query requests information, with the non-address entry in the word segmentation result as keyword.
3, the method for claim 1 is characterized in that, finishes search in described area of space to be searched by following steps:
Calculate by longitude and latitude, set up the grid in the four fork index of space and the incidence relation of described area of space to be searched;
In the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object.
4, the method for claim 1 is characterized in that, also comprises:
First identification number of the atural object that Search Results is related in the atural object database is converted to second identification number, exports to the user as the part of Search Results.
5, a kind of searching method of geography information is characterized in that, comprising:
Receive query requests information;
Dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
Inquire about initialized data base, obtain the space geometry information of this effective address;
Determine area of space to be searched according to described space geometry information;
In described area of space to be searched, search for;
The output Search Results.
6, a kind of search system of geography information is characterized in that, comprising:
Receiver is used to receive query requests information;
The participle device is used for query requests information is carried out participle, obtains effective address and keyword;
The geological information acquisition module is used to inquire about initialized data base, obtains the space geometry information of this effective address;
The region of search determination module is used for determining area of space to be searched according to described space geometry information;
Searcher is used for searching for this keyword in described area of space to be searched;
Follower is used to export Search Results as a result.
7, system as claimed in claim 6 is characterized in that, described participle device further comprises:
The address word-dividing mode, being used for dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
Common word-dividing mode is used for the non-address entry that participle obtains query requests information, with the non-address entry in the word segmentation result as keyword.
8, system as claimed in claim 6 is characterized in that, described searcher further comprises:
Relating module is used for calculating by longitude and latitude, sets up the grid in the four fork index of space and the incidence relation of described area of space to be searched;
The keyword search module is used for the atural object that comprises at corresponding grid, retrieves with described keyword, obtains target atural object.
9, system as claimed in claim 6 is characterized in that, also comprises:
The sign modular converter is used for the atural object that Search Results is related and is converted to second identification number at first identification number of atural object database, exports to the user as the part of Search Results.
10, a kind of search system of geography information is characterized in that, comprising:
Receiver is used to receive query requests information;
Address participle device, being used for dividing dictionary with the address of presetting is with reference to dictionary, and described query requests information is carried out participle, obtains effective address; Described address is divided and is stored a plurality of normal addresses entry in the dictionary;
The geological information acquisition module is used to inquire about initialized data base, obtains the space geometry information of this effective address;
The region of search determination module is used for determining area of space to be searched according to described space geometry information;
Searcher is used for searching in described area of space to be searched;
Follower is used to export Search Results as a result.
11, a kind of searching method of geography information is characterized in that, comprising:
The coordinate input or the zone on map that receive the user are selected, and determine the zone to be searched that the user is required;
Receive searching keyword;
Calculate by longitude and latitude, set up the grid in the four fork index of space and the incidence relation in described zone to be searched;
In the atural object that corresponding grid comprised, retrieve with described keyword, obtain target atural object;
The output Search Results.
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| CNA2007101192210A CN101350013A (en) | 2007-07-18 | 2007-07-18 | Method and system for searching geographical information |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101192210A CN101350013A (en) | 2007-07-18 | 2007-07-18 | Method and system for searching geographical information |
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| CN101350013A true CN101350013A (en) | 2009-01-21 |
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| CNA2007101192210A Pending CN101350013A (en) | 2007-07-18 | 2007-07-18 | Method and system for searching geographical information |
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