JP2014178260A - Log information disclosure system, log information disclosure device, log information disclosure method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a log information disclosure system, a log information disclosure device, a log information disclosure method and a computer program, preventing disclosure from specifying the personal information of a user contributing a moving route.SOLUTION: A log information disclosure method comprises: acquiring log information including information related to a moving route in which a user moves; disclosing it to be browsed from other users; acquiring the information of a browsing user desiring to browse the disclosed log information when the browsing user is present; determining whether or not the browsing user corresponds to a user limited from browsing the log information; setting the scale limit of a map when it is determined that the browsing user corresponds to the user limited from browsing of the log information; and disclosing a map image having a moving route drawn at a scale factor within the scale limit set for the browsing user.

Description

  The present invention relates to a log information disclosing system, a log information disclosing device, a log information disclosing method, and a computer program for disclosing log information posted on a computer network.

  In recent years, a system has been provided in which a user can post log information on a computer network via a terminal, and an unspecified number of users including a contributor can browse the posted log information. Here, as one piece of log information to be posted and viewed, there is information related to a movement route on which the user has moved by car, motorcycle, bicycle, walking, or the like. However, there are cases where these movement routes include information that can identify the personal information of the user. For example, when the start point, the transit point, and the end point of the travel route are the user's home, work place, acquaintance's home, etc., there is a possibility that those locations are specified from the travel route.

  Therefore, for example, in Japanese Patent Application Laid-Open No. 2012-37402, when the course data of the route from the departure place to the arrival place created by the user is disclosed, the point of departure, the arrival place, and the transit place that are private to the user are included in the course data. In this case, a technique for deleting the point or replacing the point with another facility has been proposed.

JP 2012-37402 (page 12 to page 13, FIG. 8)

  However, in the technique of the above-mentioned Patent Document 1, in the means for deleting the departure point, arrival point or waypoint which is a private point, even if the departure point, arrival point or waypoint is deleted, the remaining course data and Other users can predict the private points deleted from the surrounding maps, and sufficient effects cannot be expected. On the other hand, there is a problem that the content of the course greatly changes due to the replacement by means of replacing the starting point, the arriving point or the transit point, which is a private point, with another facility. As a result, it is impossible to achieve the purpose of wanting other users to recognize the route that the user has moved in the past or the user's original purpose of recording the route that the user has moved in the past as a record.

  The present invention has been made in order to solve the above-described conventional problems. When a user's travel route is disclosed, when the user browsing the disclosed travel route is a specific user, the travel route is determined. Log information publishing system, log information publishing device, and log information publishing method that can publish the personal information of the user who posted the travel route so that it cannot be specified by setting a scale limit on the map to be drawn And to provide a computer program.

  In order to achieve the object, a log information disclosure system (1) according to claim 1 of the present application includes log information acquisition means (15) for acquiring log information including information on a travel route (61) traveled by a user, Information disclosure means (15) for publishing a map image (62) depicting the travel route as log information, and information on a browsing user who wants to view the log information published by the information publication means are acquired. Whether or not the browsing user is a user who restricts browsing of the log information, based on information related to the browsing user acquired by the browsing user information acquisition means (15) and the browsing user information acquisition means And a restriction determination unit (15) that determines that the browsing user corresponds to a user who restricts browsing of the log information by the restriction determination unit. And a limit setting means (15) for setting a map scale limit, wherein the information disclosure means is the map at a scale ratio within the scale limit set by the limit setting means for the browsing user. It is characterized by publishing an image.

  Further, the log information disclosure system (1) according to claim 2 is the log information disclosure system according to claim 1, wherein the restriction setting means (15) sets an upper limit of a scale of the map, The information disclosure means (15) is characterized in that the map image (62) is disclosed at a scale ratio equal to or lower than the upper limit of the scale ratio set by the restriction setting means.

  Further, the log information disclosing system (1) according to claim 3 is the log information disclosing system according to claim 2, wherein the information disclosing means (15) receives a scale change request from the browsing user. If the requested map scale is less than or equal to the upper limit of the scale ratio set by the restriction setting means, the map image (62) is made public at the requested scale, and a scale change request is received from the viewing user. If the map scale requested is larger than the upper limit of the scale ratio set by the limit setting means, the map image is made public at the scale of the upper limit of the scale ratio. .

Further, a log information disclosure system (1) according to claim 4 is the log information disclosure system according to any one of claims 1 to 3, wherein the route acquisition is to acquire the size of the travel route (61). Means (15), and when the size of the moving route is equal to or larger than a predetermined size, the restriction setting means (15) sets a map scale limit, and the size of the moving route is less than the predetermined size. In this case, the travel route is changed without setting the map scale restriction by the restriction setting means, and a map image depicting the changed travel route is published as the log information.
Note that “the size of the moving route” corresponds to the total length of the moving route, the area of the polygon surrounding the moving route, the linear distance between both ends of the moving route, and the like.

  Further, the log information disclosing device (3) according to claim 5 includes log information acquisition means (15) for acquiring log information including information relating to a movement route (61) traveled by a user, and the movement route as the log information. Information disclosure means (15) for publishing a map image (62) on which the image is drawn, and browsing user information acquisition means for acquiring information of a browsing user who wants to browse the log information published by the information disclosure means (15) and restriction determination means (15) for determining whether or not the browsing user is a user who restricts browsing of the log information, based on the information regarding the browsing user acquired by the browsing user information acquisition means. ), And setting a map scale limit when it is determined by the restriction determination means that the browsing user corresponds to a user who restricts browsing of the log information Limit setting means (15), wherein the information disclosing means publishes the map image to the browsing user at a scale ratio within the scale limit set by the limit setting means. To do.

  According to a sixth aspect of the present invention, there is provided a log information disclosure method for acquiring log information including information related to a travel route (61) traveled by a user, and a map image (drawing the travel route as the log information). 62), a browsing user information acquisition step for acquiring information of a browsing user who is a user who wishes to browse the log information published in the information disclosure step, and a browsing user information acquisition step. Based on the acquired information related to the browsing user, a restriction determination step for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information; Restriction setting that sets the map scale limit when it is determined that the user is restricted from browsing It includes a step, wherein the information disclosure step, characterized in that it exposes the map image in scale of the said limit setting scale within the limits set by step with respect to the viewing user.

  Furthermore, the computer program according to claim 7 includes a log information acquisition function for acquiring log information including information related to a movement route (61) traveled by a user, and a map image in which the movement route is drawn as the log information. (62) an information disclosure function, a browsing user information acquisition function that acquires information of a browsing user who wants to browse the log information published by the information disclosure function, and the browsing user information acquisition function Based on the information related to the browsing user acquired by the above, a restriction determination function for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information, and the browsing user uses the restriction determination function to Restriction setting function to set a map scale restriction when it is determined that the user is restricted from browsing information , It is executed, the information disclosure function is characterized by publishing the map image in scale of the said limit setting scale within the limits set by the function with respect to the viewing user.

  In the log information disclosure system according to claim 1 having the above-described configuration, when a user's travel route is disclosed, when the user viewing the disclosed travel route is a specific user, the map is drawn on the travel route. By setting the scale limit, it is possible to make public so that the personal information of the user who posted the travel route cannot be specified. As a result, it is possible to limit the release to users who do not want the posting user to view while achieving the purpose of the user who discloses the log information, so the travel route was posted to an unspecified number of users It is possible to prevent the user's personal information from being specified.

  In the log information disclosure system according to claim 2, when the user's travel route is disclosed, when the user viewing the travel route is a specific user, the log information disclosure system is equal to or less than the upper limit of the set scale ratio. Since the map image is disclosed at a reduced scale, it is possible to prevent an unspecified number of users from specifically specifying a point or facility corresponding to a start point, a transit point, or an end point of a movement route.

  Further, in the log information disclosure system according to claim 3, when a scale change request is made by a user viewing the released travel route, the requested map scale is less than or equal to the upper limit of the set scale rate. The map image is published at the requested scale, and if the requested map scale is larger than the upper limit of the set scale ratio, the map image is published at the upper limit scale, so the movement route is drawn. Even when the user who has viewed the map image requested to change the scale of the map, the map image can be released only at a scale ratio equal to or lower than the upper limit of the set scale ratio. Therefore, it is possible to prevent a large number of unspecified users from specifically specifying points and facilities corresponding to the start point, the transit point, and the end point of the movement route.

  In the log information disclosure system according to claim 4, when the size of the movement route is equal to or larger than the predetermined size, a map scale limit is set, and when the size of the movement route is less than the predetermined size, If you change the travel route without setting the scale limit and publish the map image depicting the travel path after the change, if it becomes difficult to grasp the entire travel route when the scale limit is performed, By changing the movement route itself, it is possible to change the route so that the personal information of the user cannot be specified.

  Further, in the log information disclosing device according to claim 5, when the user's travel route is disclosed, when the user who browses the disclosed travel route is a specific user, the scale restriction is limited to the map on which the travel route is drawn. By setting, it becomes possible to make public so that the personal information of the user who posted the travel route cannot be specified. As a result, it is possible to limit the release to users who do not want the posting user to view while achieving the purpose of the user who discloses the log information, so the travel route was posted to an unspecified number of users It is possible to prevent the user's personal information from being specified.

  Further, in the log information disclosing method according to claim 6, when the user's travel route is disclosed, when the user who browses the disclosed travel route is a specific user, the scale is limited to the map on which the travel route is drawn. By setting, it becomes possible to make public so that the personal information of the user who posted the travel route cannot be specified. As a result, it is possible to limit the release to users who do not want the posting user to view while achieving the purpose of the user who discloses the log information, so the travel route was posted to an unspecified number of users It is possible to prevent the user's personal information from being specified.

  Further, in the computer program according to claim 7, when the user's travel route is made public, when the user who views the published travel route is a specific user, the scale restriction is set on the map on which the travel route is drawn. By doing so, it becomes possible to make public so that the personal information of the user who posted the travel route cannot be specified. As a result, it is possible to limit the release to users who do not want the posting user to view while achieving the purpose of the user who discloses the log information, so the travel route was posted to an unspecified number of users It is possible to prevent the user's personal information from being specified.

It is a schematic structure figure showing a log information disclosure system concerning this embodiment. It is the block diagram which showed the structure of the log information disclosure system which concerns on this embodiment. It is the figure shown about an example of the log information used as management object by the log information public server. It is the figure which showed an example of the storage area of log information DB. It is the figure which showed an example of the private area | region. 5 is a flowchart of a log information management processing program according to the present embodiment. It is a figure explaining the calculation method of the size of a movement path | route. It is a figure explaining the calculation method of the size of a movement path | route. It is a flowchart of the sub process program of the movement route change process which concerns on this embodiment. It is a figure explaining the change mode of the movement path | route in the case where there exists a private area | region in the range containing a part of movement path | routes. It is the figure explaining the change aspect of the movement path | route in the case where there exists a private area | region in the range containing all the movement paths | routes. It is a flowchart of the log information disclosure processing program according to the present embodiment. It is the figure which showed an example of the log information displayed on the display of a communication terminal. It is a flowchart of the log information scale change processing program according to the present embodiment.

  DETAILED DESCRIPTION Hereinafter, a log information disclosure system according to the present invention will be described in detail with reference to the drawings based on an embodiment that is embodied. First, a schematic configuration of the log information disclosure system 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram showing a log information disclosure system 1 according to the present embodiment. FIG. 2 is a block diagram showing the configuration of the log information disclosure system 1 according to this embodiment.

  As shown in FIG. 1, a log information disclosure system 1 according to the present embodiment is based on a log information disclosure server (log information disclosure device) 3 included in a log information disclosure center 2 and a communication terminal 5 owned by a user 4. It is structured. Examples of the communication terminal 5 include a personal computer (PC), a navigation device mounted on a vehicle, a mobile phone, a PDA, a tablet terminal, and a smartphone. Further, the log information disclosure center 2 and the communication terminal 5 are configured to be able to transmit / receive electronic data to / from each other via the communication network 6.

  Here, the log information disclosure server 3 manages the log information posted on the computer network by the user 4 of the communication terminal 5, and receives log information browsing requests from the user 4. Is delivered to the communication terminal 5 that requested it, so that the contents of the log information can be viewed (disclosed) by the user 4. Details of the log information disclosure server 3 will be described later.

  Here, the log information to be managed and disclosed by the log information disclosure server 3 in the present embodiment includes information on the travel route traveled by the user 4. As the information on the travel route, for the travel route that the user 4 has traveled in the past, information specifying which point on the map the travel route passes, the total length of the travel route, the elevation of the travel route There is information on the transition (level difference). Moreover, as a moving means of the moving route by the user 4, there are a car, a motorcycle, a bicycle, a walk, and the like. Then, the user 4 publishes the log information via the log information publishing server 3 by acquiring information on the own travel route and posting the acquired information on the travel route as log information to the log information publishing server 3. It becomes possible to do. Note that there are various methods for acquiring information related to the travel route. For example, information related to the travel route of the bicycle can be acquired by a cycle computer provided in the bicycle. Moreover, it is acquirable also with the smart phone provided with GPS, a navigation apparatus, etc. FIG. 3 is a diagram showing an example of log information to be managed and disclosed by the log information disclosure server 3.

  As shown in FIG. 3, the log information that is managed and disclosed by the log information disclosure server 3 includes information that specifies which point on the map the user's travel route 10 passes, Information on the total length of the route 10 and the elevation change (level difference) of the moving route 10 is included. The log information does not need to include all these pieces of information. For example, information regarding the total length of the travel route 10 or the elevation of the travel route 10 may be excluded. Further, the log information disclosure server 3 may create the information regarding the total length of the travel route 10 and the elevation of the travel route 10 from the links and coordinate points constituting the posted travel route. The log information may also include information for specifying the start point (departure point) 11, the transit point (only when there is a transit point) 12, and the end point (destination) 13 of the travel route 10. The log information disclosure server 3 stores the posted log information in the DB when the log information is posted from the user 4 as the poster as described later. Thereafter, when a log information browsing request is received from the user 4, each log information shown in FIG. 3 is distributed to the requested communication terminal 5 and configured to be browseable via the communication terminal 5 (open to the public). To do). However, under certain conditions, the disclosure is limited as described later.

  On the other hand, the communication terminal 5 is an information communication terminal having a function for acquiring the moving route of the user 4 and a display function for browsing log information. For example, a PC, a navigation device, a mobile phone, a PDA, a tablet terminal This applies to smartphones.

  The communication terminal 5 is connected to the communication network 6 via a transmission / reception circuit unit (RF) 14 and configured to be capable of bidirectional communication with the log information disclosure center 2. When the log information is received from the log information disclosure center 2, the content of the received log information (see FIG. 3) is displayed on the display or the like of the communication terminal 5 so that the user can view the content of the log information. .

The communication network 6 includes a large number of base stations arranged in various parts of the country and a communication company that manages and controls each base station. The base station and the communication company are connected to each other by wire (optical fiber, ISDN, etc.) or wirelessly. It is configured by connecting.
Here, the base station has a transceiver (transmitter / receiver) for communicating with the communication terminal 5 and an antenna. The base station performs wireless communication between the communication companies, while communicating with the log information disclosure center 2 at the terminal of the communication network 6 and communicating with the communication terminal 5 in the range (cell) within which the radio waves of the base station can reach. Have the role of relaying.

  Next, the configuration of the log information disclosure server 3 constituting the log information disclosure system 1 will be described in detail with reference to FIG. As shown in FIG. 2, the log information disclosure server 3 basically includes an information management ECU 15, a log information DB 16 and a map information DB 17 as information recording means connected to the information management ECU 15, and a center communication device 18. ing.

  The information management ECU 15 is an electronic control unit that performs various controls in the log information disclosure server 3 as shown in FIG. The CPU 21 as an arithmetic device and a control device, the RAM 22 used as a working memory when the CPU 21 performs various arithmetic processes, various control programs, a log information management processing program (FIG. 6), which will be described later, and log information disclosure An internal storage device such as a ROM 23 storing a processing program (FIG. 12), a log information scale change processing program (FIG. 14), and the like is provided. The information management ECU 15 constitutes various means as processing algorithms. For example, the log information acquisition unit acquires log information including information regarding the travel route traveled by the user 4. The information disclosing means publishes an image in which the movement route is drawn on the map image as log information. The browsing user information acquisition unit acquires information of a browsing user who is a user who wants to browse log information published by the information disclosure unit. The restriction determination unit determines whether or not the browsing user corresponds to a user who restricts browsing of log information based on information regarding the browsing user. The restriction setting means sets a map scale restriction when the restriction determining means determines that the browsing user corresponds to a user who restricts browsing of log information. The route acquisition means acquires the size of the movement route.

  The log information DB 16 is a storage unit that stores log information that is posted from the user 4 and that is to be disclosed. Here, the log information according to the present embodiment includes information related to the travel route traveled by the user as described above (see FIG. 3). FIG. 4 is a diagram showing an example of the storage area of the log information DB 16.

  As shown in FIG. 4, the log information posted by the user 4 in the log information DB 16 includes a posting time, an identification ID for identifying the posted user 4 (hereinafter referred to as a user ID), and free log information. It is stored together with an identification ID (hereinafter referred to as “permission ID”) for identifying the user 4 permitted to browse and the private area of the posted user 4. Further, as described later, the log information in which the map scale limit is set is also stored regarding the fact that the scale limit has been set. The log information stored in the log information DB 16 is configured to be distributed to the requested communication terminal 5 and browseable via the communication terminal 5 when a log information browsing request is received from the user 4. (Publish). However, as for log information for which the scale restriction is set, browsing of the log information is restricted for the user 4 other than the permission ID as described later.

  Here, the permission ID is set by the user 4 who posted the log information. For example, the ID of the poster or an acquaintance is set. As described later, for the user 4 having the permission ID, the corresponding log information can be freely browsed, while for the user 4 other than the permission ID, browsing of the log information is restricted as described above. .

  The private area is an area where the personal information of the user 4 who posted the log information can be specified. The private area is set in advance by the user 4 based on the personal information and stored in the communication terminal 5. Specifically, as shown in FIG. 5, the private area 24 is set within a predetermined distance (for example, within 1 km) from the home, workplace, and acquaintance's house of the user 4. When log information is posted from the communication terminal 5 to the log information disclosure server 3, the private area stored in the communication terminal 5 is also transmitted to the log information disclosure server 3 together with the log information. . As a result, the information management ECU 15 can grasp the private area of the user 4 who is the poster of the log information. In addition, the point where the log information disclosure server 3 is transmitted from the communication terminal 5 to the log information disclosure server 3 is transmitted from the communication terminal 5 to the log information disclosure server 3 instead of the private region. A configuration may be adopted in which a private area is set from the coordinates. Private areas may also be set in units of administrative divisions.

  The map information DB 17 is storage means for storing map information. Here, the map information stored in the map information DB 17 stores various information necessary for route search and map display including a road network. For example, link data relating to roads (links), nodes relating to node points, and the like. Data, point information 25 regarding points such as facilities, intersection data regarding each intersection, search data for searching for a route, search data for searching for a point, elevation data indicating the altitude for each point, and displaying a map It consists of map display data. The map information DB 17 is periodically updated to new map information.

  Here, the point information 25 stores information on public facilities such as stations, city halls, parks, and hospitals in addition to general facilities. Specifically, the point information 25 includes information in which a point name is associated with position information (latitude, longitude) for each point. The map information DB 17 is not included in the log information disclosure server 3 but may be configured in an external server, and the log information disclosure server 3 may acquire the point information 25 from an external server by communication.

  The center communication device 18 is a communication device for communicating with the communication terminal 5 via the communication network 6. In the present embodiment, log information is transmitted to and received from the communication terminal 5 via the center communication device 18.

  Next, a log information management processing program executed in the log information disclosure server 3 having the above configuration will be described with reference to FIG. FIG. 6 is a flowchart of the log information management processing program according to this embodiment. Here, the log information management processing program is executed when the log information is posted from the communication terminal 5 to the log information disclosure server 3, and the personal information of the user 4 who posted the information regarding the travel route included in the posted log information. It is a program that manages so that information cannot be specified. 6, 9, 12, and 14 are stored in the RAM 22, ROM 23, and the like included in the log information disclosure server 3 and executed by the CPU 21.

  First, in step (hereinafter abbreviated as S) 1 in the log information management processing program, the CPU 21 acquires log information posted from the communication terminal 5. The log information according to the present embodiment includes information related to the travel route traveled by the user as described above (see FIG. 3).

  Next, in S2, the CPU 21 creates a travel route included in the log information on the map based on the log information acquired in S1. Note that the log information acquired in S1 includes the link numbers of the links constituting the movement path and the coordinate points on the movement path as information for specifying the movement path.

  Subsequently, in S3, the CPU 21 determines whether or not the travel route created in S2 is a straight route having a different start point and end point.

  And when it determines with the movement path | route created by said S2 being a straight path | route, it transfers to S4. On the other hand, when it is determined that the travel route created in S2 is a round route having the same start point and end point (S3: NO), the process proceeds to S5.

  In S4, the CPU 21 calculates a linear distance from the start point to the end point as the size of the movement route. For example, when the travel route 40 that is a straight route as shown in FIG. 7 is created, the straight line distance L 1 from the start point 41 to the end point 42 is calculated as the size of the travel route 40. The distance along the route may be used instead of the straight line distance. Thereafter, the process proceeds to S7.

  On the other hand, in S5, the CPU 21 specifies a point on the moving route that is farthest from the start point (also corresponding to the end point).

  In S6, the CPU 21 calculates a linear distance from the start point (also corresponding to the end point) to the point specified in S5 as the size of the movement route. For example, when the travel route 43 that is a round route as shown in FIG. 8 is created, the point P on the travel route 40 that is farthest from the start point (end point) 44 is identified in S5 and started. A straight line distance L2 from the point (end point) 44 to the point P is calculated. The distance along the route may be used instead of the straight line distance.

  In S7, the CPU 21 determines whether or not the distance calculated in S4 or S6 is equal to or greater than a predetermined distance, that is, whether or not the size of the travel route included in the log information is equal to or greater than a predetermined size. In addition, when displaying the map image which drew the movement path | route on the display of the communication terminal 5, the predetermined distance displays the displayed map image and movement path | route in the state displayed on the maximum scale which can display the whole movement path | route. The minimum distance at which the visually recognized user cannot specifically identify the point or facility corresponding to the starting point or the ending point. The predetermined distance is stored in storage means such as the RAM 22.

  And when it determines with the distance calculated by said S4 or said S6 being more than predetermined distance (S7: YES), ie, when displaying the map image which drew the movement route on the display of the communication terminal 5, It was determined that the user who viewed the displayed map image and the moving route in a state where the entire moving route can be displayed could not specifically identify the point or facility corresponding to the starting point or the ending point. In this case, it is presumed that the user's personal information can be disclosed so that the user's personal information cannot be specified by setting a scale limit on the map on which the movement route is drawn without changing the movement route. Then, the process proceeds to S8.

  On the other hand, when it is determined that the distance calculated in S4 or S6 is less than a predetermined distance (S7: NO), that is, when displaying a map image in which a moving route is drawn on the display of the communication terminal 5, It was determined that the user who viewed the displayed map image and the moving route in a state where the entire moving route can be displayed can specifically identify the point and facility corresponding to the starting point and the ending point. In this case, it is presumed that the user's personal information cannot be disclosed so that the user's personal information cannot be specified unless the travel route is changed. Then, the process proceeds to S9.

  In S8, the CPU 21 sets a map scale limit. As a result, when the user 4 browsing as described later is a user who is not permitted to browse freely, the map image is displayed at a scale ratio within the scale limit when the map image on which the movement route is drawn is disclosed. It is configured to be disclosed (see FIG. 12 and FIG. 14)

  On the other hand, in S9, the CPU 21 executes a movement path changing process (FIG. 9) described later. Here, the movement route change process is a process of changing the movement route included in the log information so that the movement route is not included in the private area.

  Thereafter, in S10, the CPU 21 stores the log information posted from the communication terminal 5 in the log information DB 16. In the log information DB 16, the log information posted by the user 4 identifies the posting time, the identification ID (user ID) for identifying the posted user 4, and the user 4 who permits free viewing of the log information. The ID is stored together with the identification ID (permission ID) and the private area of the posted user 4 (see FIG. 4). The user ID, permission ID, private area, etc. are transmitted from the communication terminal 5 together with the log information. If the map scale limit is set in S8, the fact that the scale limit is set is also stored.

  Next, the sub-process of the movement route change process executed in S9 will be described with reference to FIG. FIG. 9 is a flowchart of a sub-processing program for the movement route change process.

  First, in S <b> 11, the CPU 21 acquires the private area of the user 4 who is the poster transmitted from the communication terminal 5 together with the log information. As described above, the private area is an area where the personal information of the user 4 who posted the log information can be specified, and is set in advance by the user 4 and stored in the communication terminal 5 (see FIG. 5). For example, the private area is set within a predetermined distance (for example, within 1 km) from the home, work, and acquaintance's house of the user 4.

  Subsequently, in S12, the CPU 21 compares the movement path included in the log information acquired in S1 with the private area acquired in S11, and at least a part of the movement path is included in the private area. It is determined whether or not.

  If it is determined that at least a part of the travel route is included in the private area (S12: YES), it is estimated that the travel route included in the log information is a route that can identify the personal information of the user. Then, the process proceeds to S13. On the other hand, if it is determined that the movement route is not included in the private area (S12: NO), there is no possibility that the user's personal information is identified from the movement route included in the log information. The log information management processing program is terminated to change the movement route.

  In S13, the CPU 21 compares the movement path included in the log information acquired in S1 and the private area acquired in S11, and determines whether or not the entire movement path is included in the private area. To do.

  When it is determined that only a part of the movement route is included in the private area (S13: NO), the process proceeds to S14. On the other hand, when it is determined that the entire movement route is included in the private area (S13: YES), the process proceeds to S15.

In S14, the CPU 21 changes a part of the travel route included in the log information so that the travel route is not included in the private area. Specifically, the movement route is changed by the following processes (A) to (C).
(A) First, the CPU 21 searches for public facilities outside the private area within a predetermined search distance from a point where the boundary line of the private area and the movement path intersect (hereinafter referred to as an intersection).
(B) Next, the CPU 21 searches for a recommended route from the intersection to the searched public facility.
(C) Thereafter, when the starting point of the moving route is included in the private area, the moving route is changed to the route including the searched recommended route with the searched public facility as the starting point. When the end point of the movement route is included in the private area, the searched public facility is set as the end point, and the movement route is changed to a route including the searched recommended route. If the private part includes the route between the start point and end point of the travel route, the travel route is changed to a route that includes the searched recommended route, using the searched public facility as a transit point. To do. It should be noted that the total length of the path is preferably the same before and after the change.

For example, as shown in FIG. 10, when there is a private area 52 in the range including the start point 51 of the travel route 50 and the public facility 53 is searched around the intersection A, the travel route is Then, the public facility 53 is used as a start point, the recommended route 54 from the public facility 53 to the intersection A, and the route from the intersection A to the end point 55 is changed.
Then, the CPU 21 estimates that there is no possibility that the user's personal information is specified from the changed moving route, and when the user requests to browse log information as will be described later, the changed moving route. Log information including is published.

On the other hand, in S15, the CPU 21 changes all the travel routes included in the log information so that the travel route is not included in the private area. Specifically, the movement route is changed by the following processes (A) and (B).
(A) First, the CPU 21 searches for public facilities outside the private area.
(B) Next, the CPU 21 sets the searched public facilities so that the difference in height of the movement route is the same or within a predetermined difference before and after the change and the changed movement route is not included in the private area. Change the route to start and end points. It should be noted that the total length of the path is preferably the same before and after the change.

For example, as shown in FIG. 11, when there is a private area 52 in a range including the entire movement path 50 and public facilities 56 and 57 are searched around the private area 52, the movement path Is changed to a route 58 that leads to the public facility 57 with the public facility 56 as a starting point.
Then, the CPU 21 estimates that there is no possibility that the user's personal information is specified from the changed moving route, and when the user requests to browse log information as will be described later, the changed moving route. Log information including is published.

  Next, a log information disclosure processing program executed in the log information disclosure server 3 will be described with reference to FIG. FIG. 12 is a flowchart of the log information disclosure processing program according to this embodiment. Here, the log information disclosure processing program is a program that is executed when there is a request for browsing log information from the communication terminal 5 and releases the log information to the communication terminal 5 that has requested browsing.

  First, in S21, the CPU 21 receives a browsing request transmitted from the communication terminal 5 of a user 4 (hereinafter referred to as a browsing user) who requests browsing of log information and user information of the browsing user. The browsing request includes identification information for specifying log information desired to be browsed among the log information stored in the log information DB 16. Further, the user information of the browsing user includes an identification ID for identifying the browsing user.

  Next, in S22, the CPU 21 reads log information that the browsing user desires to browse from the log information DB 16 based on the browsing request received in S21. Moreover, map information is acquired from map information DB17.

  Subsequently, in S23, when the CPU 21 displays the map image in which the travel route included in the log information is drawn on the display of the communication terminal 5 based on the log information and the map information read in S22, the entire travel route is displayed. Is specified as the maximum scale of the map (hereinafter referred to as the overall display scale).

  Thereafter, in S24, the CPU 21 determines whether or not the log information read in S22 is log information in which the map scale limit is set in S8.

  If it is determined that the log information read in S22 is the log information in which the map scale limit is set in S8 (S24: YES), the process proceeds to S25. On the other hand, when it is determined that the log information read in S22 is not the log information in which the map scale limit is set in S8 (S24: NO), the log user is restricted from browsing the log information. It determines with not performing, and transfers to S28.

  In S25, the CPU 21 determines whether or not the browsing user is a user who restricts browsing of the log information. Here, whether or not the browsing user is a user who restricts browsing of the log information is determined based on the permission ID stored in the log information DB 16 in association with the log information. Specifically, when the browsing user ID does not correspond to the permission ID, it is determined that the browsing user is a user who restricts browsing of the log information. The permission ID is set by the user 4 who posted the log information. For example, the ID of the poster or the acquaintance is set.

  If it is determined that the browsing user is a user who restricts browsing of the log information (S25: YES), the process proceeds to S26. On the other hand, when it is determined that the browsing user is not a user who restricts browsing of the log information (S25: NO), it is determined that the browsing user is not restricted to view log information, and the process proceeds to S28. Transition.

  Next, in S <b> 26, the CPU 21 determines whether or not the overall display scale specified in S <b> 23 is larger than the upper limit value (hereinafter referred to as the upper limit scale ratio) of the scale ratio set by the map scale restriction. Here, the upper limit scale ratio is a point where the user who viewed the displayed map image and the moving route when the map image on which the moving route is drawn is displayed on the display of the communication terminal 5, The maximum scale that cannot specifically identify the facility is assumed. And an upper limit scaling factor is good also as a fixed value (for example, 1/10000), and a different value (for example, 1/2500-1/25000) may be set for every log information. Note that when the upper limit scale ratio is set for each log information, it is desirable to set the upper limit scale ratio based on, for example, the total length and shape of the movement route included in the log information and the surrounding environment of the movement route.

  And when it determines with the whole display scale specified by said S23 being larger than an upper limit scale ratio (S26: YES), it determines with it being necessary to perform browsing restrictions of log information with respect to a browsing user, and S27 Migrate to On the other hand, when it is determined that the entire display scale specified in S23 is equal to or lower than the upper limit scale ratio (S26: NO), it is determined that there is no need to restrict the browsing of the log information to the browsing user. Then, the process proceeds to S28.

  In S27, the CPU 21 transmits an image in which the travel route included in the log information is drawn on the map image of the upper limit scale ratio together with the log information acquired in S22 to the communication terminal 5 of the browsing user. As a result, the log information including the map image on which the moving route is drawn is displayed on the display of the communication terminal 5 that has requested browsing of the log information (the log information is disclosed on the computer network).

  On the other hand, in S28, the CPU 21 transmits to the browsing user's communication terminal 5 an image in which the travel route included in the log information is drawn on the map image of the entire display scale together with the log information acquired in S22. As a result, the log information including the map image on which the moving route is drawn is displayed on the display of the communication terminal 5 that has requested browsing of the log information (the log information is disclosed on the computer network). Note that the log information to be disclosed in S27 and S28 is a log including the movement route after being changed in the movement route change process in S9 when the movement route change process in S9 is performed. Information.

  Here, FIG. 13 is a diagram showing an example of the log information 60 displayed on the display of the communication terminal 5. As shown in FIG. 13, log information 60 displayed on the display of the communication terminal 5 includes a poster ID, a date and time of movement, a map image 62 on which a movement route 61 is drawn, and a start point (departure point) to an end point. The image etc. which show the transition 63 of the full length of the movement route 61 to (the destination) and the elevation of the movement route 61 are included. Therefore, the user who has viewed the log information 60 can grasp when and how the user specified by the ID has moved and how. In addition, the user who has viewed the log information 60 can also specify the start point 64, the transit point (only when there is a transit point) 65, and the end point 66 of the movement route 61. However, as described above, when the restriction on the scale is set in the log information and the browsing user is a user who restricts the browsing of the log information, the map image 62 is displayed at a scale ratio equal to or lower than the upper limit scale ratio. Therefore, the browsing user cannot specifically specify the points and facilities corresponding to the start point 64, the via point 65, and the end point 66, and the personal information of the user who posted the log information is prevented from being specified. it can.

  In addition, operation icons 67 and 68 for changing the scale of the map are also displayed on the map image 62. When the browsing user operates the operation icons 67 and 68 while the map image 62 is displayed, the scale of the displayed map image can be changed as described later (see FIG. 14). However, when a restriction on the scale is set in the log information and the browsing user is a user who restricts browsing of the log information, the change in the scale is limited to a range equal to or less than the upper limit scale ratio.

  Next, a log information scale change processing program executed in the log information disclosure server 3 will be described with reference to FIG. FIG. 14 is a flowchart of the log information scale change processing program according to the present embodiment. Here, the log information scale change processing program is executed when there is a request for changing the scale of the map image on which the travel route being viewed is drawn from the communication terminal 5, and changes the scale of the map image in response to the change request. It is a program.

  First, in S31, the CPU 21 receives the scale change request transmitted from the communication terminal 5 of the viewing user who requests the change of the scale change and the user information of the viewing user. Note that the browsing request includes identification information that specifies log information that the browsing user desires to change the scale (that is, log information that the browsing user is currently browsing) and a scale ratio that is desired to be changed. Further, the user information of the browsing user includes an identification ID for identifying the browsing user.

  Next, in S32, the CPU 21 reads out log information that the browsing user desires to change the scale from the log information DB 16 based on the scale change request received in S31. Moreover, map information is acquired from map information DB17.

  Subsequently, in S33, the CPU 21 determines whether or not the log information read in S32 is log information in which the map scale limit is set in S8.

  If it is determined that the log information read in S32 is the log information in which the map scale limit is set in S8 (S33: YES), the process proceeds to S34. On the other hand, when it is determined that the log information read in S32 is not the log information in which the map scale limit is set in S8 (S33: NO), the log user is restricted from browsing the log information. It determines with not performing, and transfers to S37.

  In S <b> 34, the CPU 21 determines whether the browsing user is a user who restricts browsing of the log information. The details are the same as in S25, and will be omitted.

  If it is determined that the browsing user is a user who restricts browsing of the log information (S34: YES), the process proceeds to S35. On the other hand, when it is determined that the browsing user is not a user who restricts browsing of the log information (S34: NO), it is determined that the browsing user is not restricted to browse log information, and the process proceeds to S37. Transition.

  Next, in S35, the CPU 21 determines whether or not the scale factor requested to be changed is larger than the upper limit scale factor. Note that the upper limit scale ratio corresponds to the starting point and the ending point when the user who viewed the displayed map image and the moving route is displayed on the display of the communication terminal 5 as described above. It is the maximum scale rate that cannot specifically identify the spot or facility to be used.

  If it is determined that the scale ratio requested to be changed is larger than the upper limit scale ratio (S35: YES), it is determined that it is necessary to restrict browsing of log information to the browsing user, and the process proceeds to S36. Transition. On the other hand, when it is determined that the scale factor requested to be changed is equal to or lower than the upper limit scale factor (S35: NO), it is determined that there is no need to restrict the browsing of log information to the browsing user, The process proceeds to S37.

  In S <b> 36, the CPU 21 transmits an image in which the movement route included in the log information is drawn on the map image of the upper limit scale ratio to the communication terminal 5 of the browsing user. As a result, the scale-changed map image on which the moving route is drawn is newly displayed on the display of the communication terminal 5 that has requested browsing of log information.

  On the other hand, in S <b> 37, the CPU 21 transmits an image in which the travel route included in the log information is drawn on the map image of the scale ratio requested to be changed by the communication terminal 5 of the viewing user. As a result, the scale-changed map image on which the moving route is drawn is newly displayed on the display of the communication terminal 5 that has requested browsing of log information. As a result, when the browsing user desires to change the scale of the map displayed as log information to a more detailed or wide-scale scale, it is possible to newly display a map image at a scale ratio corresponding to the scale. Become. However, if the log information has a scale limit and the viewing user is a user who restricts the viewing of log information, the viewing user wants to change the map scale to a more detailed scale. Even if it is a case, a map image will be displayed by the scale ratio below an upper limit scale ratio. Therefore, the browsing user cannot specifically specify a point or facility corresponding to the start point, the transit point, or the end point, and can prevent the personal information of the user who posted the log information from being specified.

As described above in detail, in the log information disclosure system 1, the log information disclosure method by the log information disclosure system 1, and the computer program executed in the log information disclosure system 1 according to the present embodiment, information on the travel route traveled by the user Log information including the information is disclosed and made available for viewing by other users (S1 to S10), and when there is a viewing user who wants to view the published log information, the information of the viewing user is obtained. (S21), it is determined whether the browsing user corresponds to a user who restricts browsing of log information (S25), and when it is determined that the browsing user corresponds to a user who restricts browsing of log information, the scale of the map A restriction is set, and a map image in which a movement route is drawn at a scale ratio within the scale restriction set for the browsing user is made public (S27, 36) Therefore, when the user's travel route is disclosed, when the user viewing the travel route is a specific user, the travel route is set by setting a scale restriction on the map on which the travel route is drawn. It becomes possible to make public so that personal information of the posted user cannot be specified. As a result, it is possible to limit the release to users who do not want the posting user to view while achieving the purpose of the user who discloses the log information, so the travel route was posted to an unspecified number of users It is possible to prevent the user's personal information from being specified.
In addition, when the user's travel route is disclosed, if the user who browses the disclosed travel route is a specific user, the map image is disclosed at a scale rate equal to or less than the upper limit of the set scale rate. It is possible to prevent a specific number of users from specifically specifying a point or facility corresponding to a start point, a transit point, or an end point of a movement route.
In addition, when there is a scale change request from a user who browses a public travel route, if the requested map scale is less than or equal to the upper limit of the set scale rate, the map image is displayed at the requested scale. When the map scale is released and the requested map scale is larger than the upper limit of the set scale ratio, the map image is made public at the scale of the upper limit. Even when a change in the scale is requested, it is possible to publish the map image only at a scale ratio equal to or lower than the upper limit of the set scale ratio. Therefore, it is possible to prevent a large number of unspecified users from specifically specifying points and facilities corresponding to the start point, the transit point, and the end point of the movement route.
Also, if the size of the travel route is greater than or equal to the predetermined size, a map scale limit is set. If the size of the travel route is less than the predetermined size, the travel route is set without setting the map scale limit. Since the map image showing the changed travel route is released to the public, if it becomes difficult to grasp the entire travel route when the scale is restricted, the user's It becomes possible to change to a route where personal information cannot be specified.

Note that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the scope of the present invention.
For example, in this embodiment, S3 to S9 of the log information management processing program (FIG. 6), S23 to S26 of the log information disclosure processing program (FIG. 12), and S33 to S35 of the log information scale change processing program (FIG. 14). However, the communication terminal 5 and other servers may execute a part or all of the processes.

  In this embodiment, a user who posts log information sets an authorization ID for determining whether the browsing user is a user who restricts browsing of log information. It is good also as a structure set based on a user's user information.

  In the present embodiment, the linear distance between both ends of the movement route is calculated as the size of the movement route. However, the distance may be calculated based on the total length of the movement route, the area of a polygon surrounding the movement route, or the like.

  Further, in the present embodiment, when the size of the moving route is equal to or smaller than the predetermined size, the moving route is changed instead of setting the scale limit. However, even if the size of the moving route is equal to or smaller than the predetermined size, It is good also as a structure which sets a scale limit, without changing a movement path | route.

1 Log Information Disclosure System 2 Log Information Disclosure Center 3 Log Information Disclosure Server 4 User 5 Communication Terminal 15 Information Management ECU
16 Log information DB
17 Map information DB
21 CPU
22 RAM
23 ROM
24 Private area 60 Log information 61 Travel route 62 Map image

Claims (7)

Log information acquisition means for acquiring log information including information on a travel route traveled by the user;
Information disclosing means for disclosing a map image depicting the travel route as the log information;
Browsing user information acquisition means for acquiring information of a browsing user who is a user who wishes to browse the log information published by the information disclosure means;
Restriction determination means for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information based on information about the browsing user acquired by the browsing user information acquisition means;
A limit setting unit that sets a map scale limit when the limit determination unit determines that the browsing user corresponds to a user who limits the browsing of the log information;
The log information publishing system, wherein the information publishing means publishes the map image at a scale ratio within a scale restriction set by the restriction setting means for the browsing user. The limit setting means sets an upper limit of the scale of the map,
The log information disclosing system according to claim 1, wherein the information disclosing means publishes the map image at a scale ratio equal to or less than an upper limit of the scale ratio set by the restriction setting means. The information disclosure means includes
When there is a scale change request from the browsing user, if the requested map scale is less than or equal to the upper limit of the scale ratio set by the restriction setting means, the map image is released at the requested scale. ,
When there is a scale change request from the browsing user, if the requested map scale is larger than the upper limit of the scale ratio set by the limit setting means, the map image is displayed at the upper limit scale of the scale ratio. The log information disclosing system according to claim 2, wherein the log information disclosing system is disclosed. Route acquisition means for acquiring the size of the movement route;
When the size of the moving route is equal to or larger than a predetermined size, a map scale limit is set by the limit setting means,
When the size of the moving route is less than a predetermined size, the map is changed without changing the map scale limit by the restriction setting means, and the changed moving route is drawn as the log information. The log information disclosing system according to any one of claims 1 to 3, wherein an image is disclosed. Log information acquisition means for acquiring log information including information on a travel route traveled by the user;
Information disclosing means for disclosing a map image depicting the travel route as the log information;
Browsing user information acquisition means for acquiring information of a browsing user who is a user who wishes to browse the log information published by the information disclosure means;
Restriction determination means for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information based on information about the browsing user acquired by the browsing user information acquisition means;
A limit setting unit that sets a map scale limit when the limit determination unit determines that the browsing user corresponds to a user who limits the browsing of the log information;
The log information disclosing device, wherein the information disclosing means publishes the map image at a scale ratio within a scale limit set by the limit setting means for the browsing user. A log information acquisition step for acquiring log information including information on a travel route traveled by the user;
An information publishing step for publishing a map image depicting the travel route as the log information;
A browsing user information acquisition step of acquiring information of a browsing user who is a user who wishes to browse the log information published in the information disclosure step;
A restriction determination step for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information, based on information regarding the browsing user acquired by the browsing user information acquisition step;
A limit setting step for setting a map scale limit when it is determined by the limit determination step that the browsing user corresponds to a user who limits the browsing of the log information;
The log information publishing method, wherein the information publishing step publishes the map image at a scale ratio within the scale restriction set by the restriction setting step for the browsing user. On the computer,
A log information acquisition function for acquiring log information including information on a travel route traveled by the user;
An information disclosure function for publishing a map image depicting the travel route as the log information;
A browsing user information acquisition function for acquiring information of a browsing user who is a user who wishes to browse the log information published by the information disclosure function;
A restriction determination function for determining whether or not the browsing user corresponds to a user who restricts browsing of the log information based on information regarding the browsing user acquired by the browsing user information acquisition function;
When it is determined by the restriction determination function that the browsing user corresponds to a user who restricts browsing of the log information, a restriction setting function for setting a map scale restriction is executed, and
The computer program for publishing the map image at a scale ratio within a scale limit set by the limit setting function for the browsing user.

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