JP5373482B2 - Geographic document retrieval method, geographic document retrieval system, and geographic document retrieval program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a geographical information search system by which desired geographical document information is not overlooked. <P>SOLUTION: In a geographical document search system 1, a keyword registration unit 201 registers a search keyword in a keyword DB 211. A position information acquisition unit 202 measures a present position of a user. A search management unit 203 determines the necessity of a search of a geographical document based on relations between a measured present position and a time thereof and a time of the previous search, and a position at the time point thereof. If the search is determined to be necessary, the search management unit 203 makes an inquiry to a geographical information search system 100 on a search condition based on the search keyword extracted from the keyword DB 211 and the present position measured by the position information acquisition unit 202. The search management unit 203 outputs a search result from the geographical information search system 100 in accordance with the inquiry to an information notification unit 204, thereby notifying the result to the user. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a technique for presenting a text set that exists inside a computer or that can be accessed via a computer network, and more particularly, to a technique for automatically retrieving and presenting information instead of explicitly performing a search by a user.

  When using a conventional search system, basically, when a user wants to acquire information, the user accesses the search system, searches for the information, and acquires the search result.

  This is basically the same for a geographic information search in which a document is searched using a geographical condition such as a current position in addition to a search keyword (Non-Patent Document 1).

  As a result, a search result that is highly relevant to the search keyword and highly relevant to the geographical conditions such as the current position can be obtained at the desired timing.

Yoshihito Yasuda, Hiroyuki Toda, “Geographical information search for the immediate vicinity of search location”, Journal of the Japanese Society for Artificial Intelligence, Vol. 23 (2008), no. 5C pp. 364-37 David Nadeau, Satoshi Sekine, “A survey of named entity recognition and classification”, Journal of Linguistic Investments 30-1 2007. Satoshi Kimura, Hiroyuki Toda, Katsumi Tanaka: “Identification of Persons with Same Name by Clustering Search Result Snippets”, Proc. 17th Data Engineering Workshop (DEWS2006), 2C-i11, March 2006

  However, the above method can only acquire information when the user takes action. As a result, even if information that the user is interested in exists near the current position of the user, the user cannot know.

  In the above method, there is a trouble of inputting a keyword every time a search is performed, and this is a barrier to use for a user who searches with the same keyword at any place.

  Therefore, the present invention searches for geographic documents based on a search keyword registered in advance and the current position of the user, and presents the search result to the user when a search result exists.

That is, as an aspect of the geographic document search method of the present invention, there is a geographic document search method for searching for a geographic document based on a keyword registered in advance and a user's current position, and the keyword registration means stores the search keyword in a database in advance . The position information acquisition means measures the current position of the user, and the search management means determines the relationship between the measured current position, the time, the last searched time, and the position at that time. Based on the search condition based on the search keyword extracted from the database and the measured current position when it is determined that the search is necessary. A step of outputting a search result.

As an aspect of the geographic document search system of the present invention, there is a geographic document search system for searching a geographic document based on a keyword registered in advance and a user's current position, and a keyword registration means for registering a search keyword in a database in advance . Based on the relationship between the measured current position, the measured current position, the time, the last searched time, and the position at that time. And a search management means for outputting a search result obtained by an inquiry to a geographic information search system based on a search condition based on a search keyword extracted from the database and the measured current position when it is determined to search. .

  The present invention can also be implemented as a geographic document search program that causes a computer to function as each means constituting the geographic document search system or a computer-readable recording medium that records the program.

  Therefore, according to the above invention, the desired geographic document information is not overlooked. In addition, since a keyword registered in advance is used, the trouble of inputting the keyword can be saved, so that the barrier to use of the geographic information search system can be reduced.

1 is a configuration diagram of a geographic document search system according to a first embodiment of the invention. An example of the keyword registration interface which concerns on 1st embodiment. An example of the keyword database which concerns on 1st embodiment. The flowchart explaining the process of the search process which concerns on 1st embodiment. The block diagram of the geographic document search system which concerns on 2nd embodiment of invention. The flowchart explaining the process of the search process which concerns on 2nd embodiment. An example of the search result which concerns on 2nd embodiment.

  A geographic document search system 1 according to the embodiment of the present invention shown in FIG. 1 includes a geographic information search system 100 and an information access system 200.

  The geographic information search system 100 is a system that searches for text information in consideration of geographical restrictions in addition to normal search keywords (Non-Patent Document 1). When registering a document, this system extracts a place name expression from the document and assigns these place name expressions to positions on latitude and longitude coordinates. When a search is actually performed, the document's geographic score is calculated from the relationship between the input geographical constraint and the location information of the place name expression, and the document's content score is calculated from the input search keyword and the document's content. The score of the document is calculated by calculating and combining these, and the document group in the search result is ranked and presented.

  The information access system 200 is realized on a mobile terminal such as a mobile phone that can be carried by a user, that is, a user, and includes the following functional units 201 to 204, 210, and 211. In addition, the system 200 includes communication means (communication device) for communicating with the geographic information search system 100. It should be noted that functions other than the position information acquisition unit 202 can be constructed outside the system 200.

  The keyword registration unit 201 is means for registering a desired keyword by the user via the input / output device 210. Keywords can be modified or deleted after registration. FIG. 2 shows an example of a graphic user interface when a user registers and edits a keyword. In the “keyword registration screen” of the illustrated interface, forms for inputting keywords are arranged in a column, and a registration button and a delete button for the input keyword are displayed on each form.

  The position information acquisition unit 202 measures the position of the user holding the information access system 200 by means such as positioning using GPS, a mobile phone, or a wireless LAN base station, and notifies the search management unit 203 of the position.

  The search management unit 203 acquires the current location of the user from the location information acquisition unit 202, takes into account the elapsed time from the time when the previous search was performed and the distance between the location where the previous search was performed and the current location, to a certain level or more. When it is determined that there is a time interval or a distance, the geographic information search system 100 is accessed via the communication means to perform a search. In the access, a search condition based on the registered search keyword extracted from the keyword DB 211 and the current position measured by the position information acquisition unit 202 is used. If a search result exists as a result of the search, the search result is output to the information notification unit 204.

  In addition, in the search, in consideration of the past movement amount, movement speed, etc., the position at the time of arrival immediately after the user's movement is predicted instead of the current position, and this is used as position information of the search condition. Also good.

  Upon receiving the search result from the search management unit 203, the information notification unit 204 notifies the user of the arrival of information through the input / output device 210 and presents the search result automatically or in response to a request from the user.

  The input / output device 210 includes an information input device such as a keyboard or a numeric keypad, an information output device such as a display for displaying the interface and the like, and an information notification device that notifies arrival of information by sound or vibration. This is used when a user registers a search keyword, notifies and presents a search result, and the like.

  The keyword DB 211 is a database that manages keywords for each user registered by the keyword registration unit 201. A registered keyword is presented in response to an inquiry from the search management unit 203. When placed in the information access system 200, the database manages only the keywords of the user of the information access system 200. On the other hand, when it is arranged outside the information access system 200, for example, on a server, it is managed with information that can identify users such as terminal IDs and user IDs in order to register keyword information of a plurality of users. It is good to do.

  An example of the keyword DB 211 is shown in FIG. The database shown in FIG. 3A is an aspect in the case of being built in the information access system 200. This database has a column in which a keyword is recorded and a column in which the last update time of the keyword recorded in each column is recorded. The database shown in FIG. 3B is an aspect in the case where it is constructed outside the information access system 200. This database has a column in which a user ID is recorded, a column in which a keyword used by a user of each user ID is recorded, and a column in which the last update time of a keyword described in each column is recorded. .

  The process of search processing according to this embodiment will be described with reference to FIG. The processing process of this embodiment includes a preliminary process (S100) in which a user registers a keyword, and a search process (S101 to S105) in which a position is actually measured to perform a search.

  S100: When a search keyword is input from the input / output device 210 by a user operation, the keyword registration unit 201 registers the search keyword in the keyword DB 211.

  S 101: The position information acquisition unit 202 measures the current position and transmits it to the search management unit 203.

  S102: The search management unit 203 determines whether to execute a search from the relationship between the current position and the time provided from the position information acquisition unit 202 and the time and position searched last time.

  S103: When the search management unit 203 recognizes that there is a change in the movement of the user, that is, the position information acquired by the position information acquisition unit 202, the search management unit 203 acquires the search keyword from the keyword DB 211, An inquiry is made to the geographic information search system 100 via the communication means under search conditions based on the measured current position information.

  S104: When there is a search result in the inquiry to the geographic information search system 100, the search management unit 203 transmits the search result to the information notification unit 204.

  S105: When the information notification unit 204 acquires the search result, the information notification device of the input / output device 210 notifies the user of the arrival of information and presents the search result.

  As described above, according to the geographic document search system 1 according to the embodiment of the present invention, automatic search is possible based on the search keyword registered in advance by the user and the current position of the user. Further, when a search result exists, the user is notified of this, so that the user is not required to perform a search act and the desired information is not overlooked.

  A geographic document search system 2 according to the second embodiment of the invention shown in FIG. 5 will be described.

  The geographic document search system 2 is a mode in which functional units 301 to 304 are provided in the system configuration of the geographic document search system 1 according to the first embodiment. The functional unit 304 can communicate with the geographic information search system 100 and the information access system 200 via a communication means (communication device). The function unit 304 and the function units 301 to 303 are connected via a wired or wireless network.

  The object extraction unit 301 analyzes the text or summary sentence of the search result and extracts an object that seems to be a real-world entity. It is conceivable to use specific expression extraction (Non-patent Document 2) or to extract based on collation with a database entry consisting of a list of objects. What kind of object is to be extracted is determined in advance.

  The object aggregating unit 302 is a unit that aggregates the objects extracted by the object extracting unit 301 in units of entities (components) existing in the real world. As the aggregation method, a method of classification based on the notation of the object and the context in which the object exists is adopted. More specifically, for example, it is conceivable to identify an object by clustering summary sentences in a search result including the object, and associate the contents of the summary sentence with a specific entity (Non-patent Document 3). ).

  The object ranking unit 303 ranks the objects aggregated for each entity by the object aggregation unit 302. The ranking may be based on the number of appearances in the search result of the entity.

  In response to an inquiry from the search management unit 203, the presentation information generation unit 304 first accesses the geographic information search system 100 and acquires a search result. Then, the search result is analyzed using the object extraction unit 301, the object aggregation unit 302, and the object ranking unit 303, and an entity list in the search result is acquired. Then, for each entity, the search result is associated and returned to the search management unit 203 as the search result.

  The process of the search process according to this embodiment will be described with reference to FIG. The processing process of the present embodiment includes a pre-process (S400) in which a user registers a keyword, and a search process (S401 to S411) in which a position is actually measured to perform a search.

  S400: When a search keyword is input from the input / output device 210 by a user operation, the keyword registration unit 201 registers the search keyword in the keyword DB 211.

  S401: The position information acquisition unit 202 measures the current position and transmits it to the search management unit 203.

  S402: The search management unit 203 determines whether or not to execute the search from the relationship between the current position and the time provided from the position information acquisition unit 202 and the time and position searched last time.

  S403: When the search management unit 203 recognizes that there is a change in the movement of the user, that is, the position information acquired by the position information acquisition unit 202, the search management unit 203 acquires the search keyword from the keyword DB 211, The presentation information generation unit 304 is inquired via the communication means with a search condition based on the measured current position.

  S404: The presentation information generation unit 304 makes an inquiry to the geographic information search system 100 via the communication unit using the search condition received from the search management unit 203 in S403, and acquires the search result.

  S405: If there is a search result, the process proceeds to S406. On the other hand, if there is no search result, the search process is terminated.

  S 406: The presentation information generation unit 304 transmits the search result acquired in S 404 to the object extraction unit 301. The object extraction unit 301 extracts object information from the search result and returns it to the presentation information generation unit 304.

  S407: The presentation information generation unit 304 transmits the object information extracted in S406 to the object aggregation unit 302. The object aggregating unit 302 aggregates the object information for each entity in the real world and returns it to the presentation information generating unit 304.

  S408: The presentation information generation unit 304 transmits the object information aggregated in S407 to the object ranking unit 303. The object ranking unit 303 ranks the object information and returns it to the presentation information generation unit 304.

  S409: The presentation information generation unit 304 generates presentation information by combining the search result acquired in S404 and the object information returned from the object ranking unit 303, and returns it to the search management unit 203.

  S410: The search management unit 202 transmits the search result received in S409 to the information notification unit 204.

  S411: Upon acquiring the search result, the information notification unit 204 notifies the user of the arrival of information using the information notification device of the input / output device 210 and presents the search result.

  An example of a search result output and displayed from the input / output device 21 is shown in FIG. The illustrated “information providing screen” is information when a user who has registered “ramen” as a keyword when the store name is specified as an entity to be extracted on the system 200 side is near “Yokohama Station West Exit”. Is disclosed. According to the display example, the name of the ramen shop near the west exit of Yokohama Station and the related information of the shop are disclosed.

  As described above, according to the geographic document search system 2, in addition to the effects of the above-described geographic document search system 1, information related to real-world entities can be easily acquired.

  The information access system 200 including the functional units 201 to 204, 210, and 211 according to the geographic document search systems 1 and 2 of the present invention is a so-called portable terminal hardware resource such as a CPU, a memory (external memory, internal memory), It can be configured with a communication device, display, and keyboard. The keyword DB 211 may be stored in the memory. The position information acquisition unit 202 may apply position information acquisition means employed in known portable terminals. In the first embodiment, functional units other than the functional unit 202 related to the information access system 200 may be provided in a server that relays between the geographic information search system 100 and the information access system 200. In the second embodiment, the server may function as the functional units 301 to 304 related to the geographic document search system 2.

  The present invention also provides a storage medium in which a program code of software for realizing the functions of the above-described embodiments is recorded to a system or apparatus, and a program in which the CPU (MPU) of the system or apparatus is stored in the storage medium. This can also be realized by reading and executing the code. In that case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and a storage medium storing the program code, for example, a CD-ROM, a DVD-ROM, a CD-R, The MO, HDD, etc. constitute the present invention.

1, 2 ... Geographic document search system 100 ... Geographic information search system 200 ... Information access system 201 ... Keyword registration unit (keyword registration means)
202 ... position information acquisition unit (position information acquisition means)
203 ... Search management section (search management means)
211 ... Keyword DB (database)
301: Object extraction unit (object extraction means)
302 ... Object aggregation unit (object aggregation means)
303 ... Object ranking unit (object ranking means)
304 ... Presentation information generation unit (presentation information generation means)

Claims (9)

A geographic document search method for searching a geographic document based on a keyword registered in advance and a current position of a user,
A step in which the keyword registration means registers the search keyword in the database in advance ;
A step in which the position information acquisition means measures the current position of the user;
When the search management means determines whether or not to search for a geographic document based on the relationship between the measured current position, its time, the time of the previous search, and the position at that time, and if it is determined to search, the database And a step of outputting a search result obtained by an inquiry to a geographic information search system based on a search condition based on a search keyword extracted from the current position and the measured current position. An object extracting means for extracting object information from the search results;
An object aggregating means for aggregating the extracted object information in units of entities existing in the real world;
An object ranking means ranking object information aggregated for each unit of the entity;
The presentation information generating unit further includes a step of generating information to be disclosed to a user by associating the ranked list of object information with a document related to each object information. The described geographic document search method. 3. The geographical document search method according to claim 2 , wherein in the step of ranking the object information, the object information is ranked based on the number of appearances of the entity in the search result. It claims 1 to 3, further comprising the step of subjecting the retrieval management means position information predicted this predicts the position of the time when it reaches the immediately following movement of no user is currently located in the determination of the search condition The geographic document search method according to any one of the above. A geographic document search system for searching a geographic document based on a keyword registered in advance and a current position of a user,
Keyword registration means for registering search keywords in the database in advance ;
Position information acquisition means for measuring the current position of the user;
Based on the relationship between the measured current position, its time, the time of the previous search, and the position at that time, it is determined whether or not the search of the geographic document is necessary, and the search keyword extracted from the database when it is determined to search And a search management means for outputting a search result obtained by an inquiry to the geographic information search system based on a search condition based on the measured current position. Object extraction means for extracting object information from the search results;
Object aggregation means for aggregating the extracted object information in units of entities existing in the real world;
An object ranking means for ranking object information aggregated for each unit of the entity;
6. The presentation information generating means for generating information to be disclosed to a user by associating the ranked list of object information with documents related to the respective object information. Geographic document search system. 7. The geographic document search system according to claim 6 , wherein the object ranking unit ranks the object information based on the number of appearances of the entity in the search result. 8. The search management unit according to claim 5, wherein the search management means predicts not the current position but a position at the time when the user arrives immediately after moving, and uses the predicted position information to determine the search condition . The geographic document search system according to item 1 .   A geographic document search program for causing a computer to function as each means constituting the geographic document search system according to any one of claims 5 to 8.

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