JP2019075176A - Server device - Google Patents

Abstract

To provide a server device and a navigation device that can efficiently detect an error in map data.SOLUTION: A server device collects probe information transmitted from a plurality of navigation devices. The server device includes determination means that determines, on the basis of the probe information when rerouting occurs in the navigation device, an error in map data at a place where the rerouting occurs. As a result, the error in the map data can be efficiently detected.SELECTED DRAWING: Figure 6

Description

  The present invention relates to the technical field of a system comprising a plurality of navigation devices and a server device that receives information from the plurality of navigation devices.

  Techniques of this type are described, for example, in Patent Document 1. Patent Document 1 describes a system for generating new road information on a new road to be added to map information stored in a navigation device or the like. Specifically, in this technology, it is described that the server device acquires and collects traveling locus information (probe data) from the navigation device, and generates new road information based on the collected traveling locus information. There is.

JP, 2008-164821, A

  By the way, the map data which road data etc. which a navigation apparatus or a server apparatus has memorized, etc. may be different from an actual road etc. That is, map data may be wrong. An error in map data can occur due to the opening of a new road, an error in data acquisition, or a change in some construction. As described above, when the map data is incorrect, problems may occur in the map display, the display of the vehicle position, the route search and the like. Therefore, it is convenient if it is possible to efficiently detect map data errors. According to the technology described in Patent Document 1 described above, it is possible to detect an error in map data resulting from the opening of a new road by the process of generating a new road, but in this technology, the opening of a new road is opened. It has been difficult to efficiently detect various map data errors, including those for other reasons.

  As problems to be solved by the present invention, the above-mentioned ones can be mentioned as one example. An object of the present invention is to provide a server device and a navigation device capable of efficiently detecting an error in map data.

  The invention according to claim 1 is a server device that collects probe information transmitted from a plurality of navigation devices, and the reroute is generated based on the probe information when a reroute is generated in the navigation device. It is characterized in that it comprises determination means for determining an error in map data of a place.

The schematic structural example of the system implement | achieved by the server apparatus which concerns on a present Example, and a navigation apparatus is shown. It is a block diagram which shows schematic structure of the server apparatus which concerns on a present Example, and a navigation apparatus. The figure for demonstrating inclination determination concretely is shown. An example of guidance data is shown. The processing flow performed by the navigation apparatus in a present Example is shown. The processing flow performed by a server apparatus in a present Example is shown.

  In one aspect of the present invention, a server device that collects probe information transmitted from a plurality of navigation devices is a map of a place where the reroute occurs based on the probe information when the reroute occurs in the navigation device. A determination means for determining an error in data is provided.

  The above server device is suitably used to collect probe information transmitted from a plurality of navigation devices. For example, the probe information is travel locus data indicating a travel locus of the vehicle. The determination means determines an error in the map data of the location where the reroute has occurred based on the probe information when the reroute has occurred in the navigation device. In this case, basically, the user travels along the set route, and when reroute occurs (that is, when traveling on a road off the route), the location where such reroute has occurred. It is because it is thought that map data is likely to be wrong. By thus determining an error in map data in accordance with the occurrence of rerouting, it is possible to efficiently detect an error in map data.

  In one aspect of the above server device, the determination means obtains a value of “number of reroutes / number of route travels” for each link or for each predetermined link group consisting of a plurality of links including the links, and the value is An error in the map data is determined only for the one link or the predetermined link group having a predetermined value or more.

  In this aspect, the determination means can determine map data errors only for links for which it is highly likely that map data is incorrect. This makes it possible to suppress an increase in processing load required for the determination.

  In the above server device, preferably, the determination means can determine an error in inclination data indicating an inclination angle of a road, which is included in the map data.

  In a preferred example, the probe information includes data of an inclination angle of a road on which the mobile unit travels, and the determination means includes the inclination data of the map data and the inclination angle of the probe information. The inclination data is determined to be incorrect by comparing it with the data of. In this way, it is possible to properly determine the inclination data error.

  In another preferable example, the probe information includes inclination determination information indicating whether or not the determination on the inclination of the road on which the mobile unit has traveled is performed in the navigation device; If the tilt determination information in the probe information indicates that the determination has been made, it is determined that the tilt data is incorrect. Thereby, an error in inclination data can be easily determined.

  In the above server device, preferably, the probe information has travel locus data of a mobile body, and the determination means has road data in the horizontal direction of the map data and the probe information. An error in the road data in the horizontal direction is determined by comparing with the travel locus data. This makes it possible to properly determine an error in road data in the horizontal direction.

  In addition, in the above server device, preferably, the determination means can determine an error in regulation data indicating traffic regulation included in the map data.

  Further, in the above server device, preferably, the determination means can determine an error in guidance data used for guiding a user of the navigation device, which is included in the map data.

  In the above server device, preferably, the determination means can determine an error in the traffic congestion data included in the map data.

  In another aspect of the above server device, the server further includes a correction unit that corrects the map data based on the probe information when it is determined by the determination unit that the map data is incorrect. This makes it possible to correct erroneous map data appropriately.

  In another aspect of the present invention, the navigation device capable of communicating with the server device comprises: a first transmission unit for transmitting probe information to the server device; and a location where the reroute is performed in the server device when the reroute is performed. And second transmission means for transmitting reroute information indicating that the reroute has been performed to the server apparatus in order to determine whether the map data is incorrect.

  According to the above navigation device, by transmitting the reroute information to the server device, it is possible to make the server device determine an error in map data of a place where the reroute has occurred. Therefore, in the server device, it is possible to efficiently detect an error in map data.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[System configuration]
FIG. 1 shows an example of a schematic configuration of a system realized by the server device 1 and the navigation device 2 according to the present embodiment. As shown in FIG. 1, the navigation devices 2 a to 2 c are mounted on different vehicles 3 a to 3 c, respectively, and transmit and receive information with the server device 1. The server device 1 stores the information received from the navigation devices 2a to 2c. For example, the navigation device 2 can be a stationary navigation device installed in the vehicle 3, a portable navigation device (PND), or a mobile phone such as a smartphone.

  Although only three navigation devices 2a to 2c are illustrated in FIG. 1 for convenience of explanation, in actuality, four or more navigation devices 2 exist.

  FIG. 2 is a block diagram showing a schematic configuration of the server device 1 and the navigation device 2. The server device 1 and the navigation device 2 are configured to be communicable with each other by a wireless network or the like.

  The navigation device 2 mainly includes a control unit 21, a storage unit 22, a GPS receiver 23, a self-supporting positioning device 24, a display unit 25, and a communication unit 26.

  The GPS receiver 23 receives radio waves carrying downlink data including positioning data from a plurality of GPS satellites. The positioning data is used to detect an absolute position (current position) of the vehicle 3 from latitude and longitude information and the like.

  The self-supporting positioning device 24 includes an acceleration sensor (not shown), an angular velocity sensor, a distance sensor, and the like. The acceleration sensor is formed of, for example, a piezoelectric element, detects the acceleration of the vehicle 3, and outputs acceleration data. The angular velocity sensor is, for example, a vibrating gyroscope, detects the angular velocity of the vehicle 3 at the time of direction conversion of the vehicle 3, and outputs angular velocity data and relative azimuth data. The distance sensor measures vehicle speed pulses consisting of pulse signals generated as the wheels of the vehicle 3 rotate.

  The communication unit 26 is configured to be capable of wireless communication with the server device 1. The communication unit 26 is also configured to be able to receive information distributed from a vehicle information communication system (VICS) center or the like ("VICS" is a registered trademark). The communication unit 26 corresponds to an example of the “first transmission unit” and the “second transmission unit” in the present invention.

  The display unit 25 includes, for example, a liquid crystal display, and displays characters, images, and the like to the user. The display unit 25 may be configured by a touch panel or the like.

  The storage unit 22 includes, for example, an HDD, and stores various data used for navigation processing such as map data.

  The control unit 21 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like (not shown), and controls the entire navigation device 2. For example, with reference to the map data stored in the storage unit 22, the control unit 21 performs processing for performing route guidance from the departure place to the destination.

  In the present embodiment, the navigation device 2 transmits probe information to the server device 1. For example, the probe information includes data of latitude and longitude coordinates corresponding to the position of the vehicle 3, data of the traveling speed of the vehicle 3, and data of the traveling direction of the vehicle 3. The data of the latitude and longitude coordinates corresponding to the position of the vehicle 3 among the probe information corresponds to the traveling locus data of the vehicle 3 in other words. As the latitude / longitude coordinates, values obtained by performing map matching processing on values obtained by the GPS receiver 23 and the autonomous positioning device 24 and map data of the storage unit 22 are used. As the latitude and longitude coordinates, the value obtained by the autonomous positioning device 24 or the value received by the GPS receiver 23 may be used, or the value received by the GPS receiver 23 is obtained by the autonomous positioning device 24. A value corrected by the value may be used.

  Moreover, the value which self-supporting positioning apparatus 24 calculated | required is used for a traveling speed and a traveling direction. The traveling speed and the traveling direction may use the direction after the map matching process, or may use the GPS speed and the GPS direction calculated from the reception data of the GPS receiver 23.

  Further, the probe information also includes data of an inclination angle in the pitch direction on the road on which the vehicle 3 has traveled. Such an inclination angle is determined by an acceleration sensor in the self-supporting positioning device 24. In addition to this, data indicating the type of road (such as a main road or a narrow street) on which the vehicle 3 travels is set in the probe information, data of a destination set in the navigation device 2, or the data set in the navigation device 2 You may include route data etc.

  On the other hand, the server device 1 mainly includes a control unit 11, a storage unit 12, and a communication unit 13.

  The communication unit 13 is configured to be capable of wireless communication with the navigation device 2. Specifically, the communication unit 13 receives the probe information transmitted from the plurality of navigation devices 2.

  The storage unit 12 stores probe information transmitted from a plurality of navigation devices 2. The storage unit 12 also stores map data similar to the map data stored in the navigation device 2.

  The control unit 11 includes a CPU, a ROM, a RAM, and the like (not shown), and controls the entire server device 1. In the present embodiment, the control unit 11 performs a process of determining an error in map data based on the probe information (the details will be described later). The control unit 11 corresponds to an example of the “determination unit” and the “correction unit” in the present invention.

[Control method]
Next, an outline of a control method performed by the control unit 11 in the server device 1 in the present embodiment will be described.

  In the present embodiment, the control unit 11 in the server device 1 determines an error of the map data stored in the storage unit 12 based on the probe information transmitted from the plurality of navigation devices 2. Specifically, the control unit 11 determines an error in the map data regarding the place where the reroute has occurred in the navigation device 2. In this case, basically, the user travels along the set route, and when reroute occurs (that is, when traveling on a road off the route), the location where such reroute has occurred. It is because it is thought that map data is likely to be wrong.

  More specifically, the navigation device 2 transmits reroute information indicating that rerouting has been performed to the server device 1 (the reroute information may be included in the probe information), and the server device performs such reroute information. Based on, it determines the mistake of map data. In this case, based on the reroute information, the server device "per number of reroutes / for every predetermined link (meaning one link or a predetermined link group consisting of a plurality of links including the link)". The value of the number of route travels is obtained, and a mistake in the map data is determined only for a link whose value of the number of reroutes / the number of route travels is equal to or greater than a predetermined value. In this way, a link with a large value of “number of reroutes / number of route trips” can be said to be quite likely that map data is wrong, so from the viewpoint of preventing an increase in processing load, Decision is to be made. The “number of reroutes” corresponds to the number of occurrences of reroutes in any link, and the “number of route travels” corresponds to the number of routes traveled by any link.

  Further, based on the probe information on the location where the reroute has occurred, the control unit 11 determines that the road data in the horizontal direction, the inclination data indicating the inclination angle of the road, the restriction data indicating the traffic restriction, And determine errors in the guidance data used to guide the user and the congestion data. Then, when an error in map data is detected, the control unit 11 corrects the error based on the probe information. The details of the determination method of map data error and the correction method of map data will be described later.

  In the present specification, “map data” is treated as data including road data in the horizontal direction, inclination data, regulation data, guidance data, traffic congestion data, and the like. The “horizontal road data” is data having at least position coordinates (latitude and longitude) on a horizontal surface that defines a road (link). The “congestion data” is data such as congestion statistical information (congestion prediction information statistically obtained from past information) or congestion information transmitted by VICS or the like, and is associated with a link. For example, in the “congestion data”, a congestion condition (congestion, congestion, smooth) is associated with each time zone.

  Here, the method of using the inclination data described above will be described for reference. The inclination data is data indicating an inclination angle in the pitch direction on the road (link). In addition, inclination data is one of map data, and is associated with a link. Such inclination data is used, for example, in the navigation device 2 when performing processing (so-called map matching) for matching the vehicle position on the road possessed by the map data. Specifically, the navigation device 2 travels the vehicle 3 by comparing the inclination angle of the road detected by the acceleration sensor in the self-supporting positioning device 24 with the inclination angle in the inclination data of the map data. A certain road is determined (hereinafter, the determination is referred to as “inclination determination”), and map matching is performed based on the determination result. In addition, basically, the inclination determination is performed only on the road where the inclination data exists.

  FIG. 3 shows a diagram for specifically explaining the inclination determination. FIG. 3A shows a schematic view of road A and road B (a schematic representation of an image displayed by the navigation device 2) at the top, and a road of road A and road B at the bottom. Data is shown. Specifically, in FIG. 3A, “o” indicates road data of road A, and “■” indicates road data of road A. These road data are data different from the above-described horizontal road data, and correspond to vertical road data. Specifically, the road data corresponds to data (inclination data) in which the inclination angle of the road is associated with the position coordinates. As shown to Fig.3 (a), it turns out that the road A is a flat road and the road B is a road which has a slope. In one example, the road A is a road corresponding to the main road of the freeway, and the road B is a road extending from the exit of the freeway.

  FIG. 3B shows an example of the inclination determination. In FIG. 3B, “「 ”indicates the inclination angle detected by the acceleration sensor in the self-supporting positioning device 24, that is, the inclination angle of the road on which the vehicle 3 travels. The navigation device 2 performs the inclination determination by comparing the inclination angle detected in this manner with the road data (inclination data) of the roads A and B. In this case, since the detected inclination angle substantially matches the road data of road B, the navigation apparatus 2 determines that the vehicle 3 is traveling on the road B having the inclination, and the vehicle 3 is on the map. The position is displayed on road B (map matching).

  According to such an inclination determination, the road on which the vehicle 3 travels is appropriately specified even in a place where the main line and a road extending from the exit are close to each other or a place where the GPS receiver 23 does not measure. be able to. Moreover, the misjudgment of the road which the vehicle 3 drive | work resulting from a GPS positioning error can be suppressed appropriately.

  Next, the above-described induction data will be described for reference. Guidance data is data used to guide a user. The guidance data is, for example, data indicating a direction (guiding direction) for guiding the user, a name of a guidance point, a distance to the guidance point, and the like, and also includes image data such as characters and illustrations for representing them. Further, the guidance data is one of map data, and is associated with a link.

  FIG. 4 shows an example of guidance data. FIG. 4 shows guidance data for guiding to the entrance of the expressway.

Processing flow
Next, with reference to FIGS. 5 and 6, the process flow in the present embodiment will be specifically described.

  FIG. 5 shows a process flow performed by the navigation device 2 in the present embodiment. In the processing flow, processing for determining whether or not rerouting is to be performed, and processing for transmitting rerouting information when rerouting is performed are performed. Further, the process flow is repeatedly executed by the control unit 21 in the navigation device 2.

  First, in step S101, the control unit 21 determines whether a route is set. When the route is set (step S101: Yes), the process proceeds to step S102.

  In step S102, the control unit 21 determines whether the vehicle 3 is traveling on a road on the route. For example, the control unit 21 performs such a determination by comparing the current position of the vehicle 3 (the latitude and longitude coordinates described above) with road data in the horizontal direction on the road on which the route is set. If the vehicle 3 is not traveling on the road on the route (step S102: Yes), the process proceeds to step S103.

  In step S103, the control unit 21 performs rerouting. Specifically, since the vehicle 3 does not travel on the road on the route initially set, the control unit 21 recalculates a new route to the destination based on the current position of the vehicle 3 (researching ). For example, the control unit 21 performs rerouting when the vehicle 3 is separated by 50 m or more from the originally set route. Then, the process proceeds to step S104.

  In step S104, the control unit 21 transmits, to the server device 1, reroute information indicating that rerouting has been performed. For example, the control unit 21 transmits the reroute information to the server device 1 together with the probe information, or transmits the probe information including the reroute information to the server device 1. Then, the process ends.

  On the other hand, when the route is not set (step S101: No), and when the vehicle 3 is traveling on the road on the route (step S102: No), the process proceeds to step S105. In this case, the control unit 21 does not perform rerouting (step S105). Then, the process ends.

  Next, FIG. 6 shows a process flow performed by the server device 1 in the present embodiment. In this processing flow, processing for determining whether map data is incorrect or processing for correcting incorrect map data is mainly performed.

  The processing flow shown in FIG. 6 is performed for each link (for each link or each predetermined link group including a plurality of links including the link). In addition, the processing flow is performed using, for example, a plurality of probe information collected in a predetermined period (in the example, the last three months in one example). The process flow is repeatedly executed by the control unit 11 in the server device 1.

  First, in step S201, the control unit 11 obtains the value of “number of reroutes / number of route travels” for the link to be processed based on the reroute information from the navigation device 2, and the obtained value is a predetermined value. It is determined whether it is above or not. If the value of “number of reroutes / number of route travels” is equal to or greater than a predetermined value (step S201: Yes), the process proceeds to step S202. In this case, there is a high possibility that the map data stored in the storage unit 12 is incorrect. Therefore, in step S202 and subsequent steps, processing for identifying an error in map data and processing for correcting an incorrect map data are performed. It will be. On the other hand, when the value of the “number of reroutes / the number of route travels” is less than the predetermined value (step S201: No), the process ends. In this case, since the possibility that the map data stored in the storage unit 12 is incorrect is not so high, processing for identifying an error in the map data is not performed.

  In step S202, the control unit 11 determines whether or not there is a problem in the road data in the horizontal direction included in the map data, based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 determines whether there is a problem in the road data in the horizontal direction by comparing the traveling locus data included in the probe information with the road data in the horizontal direction included in the map data. . For example, the control unit 11 determines that the road data in the horizontal direction is incorrect when the road position (latitude, longitude) or shape indicated by each data is different between the traveling locus data and the road data in the horizontal direction. judge.

  If there is a problem with the road data in the horizontal direction (step S202: Yes), the process proceeds to step S203, and if there is no problem in the road data in the horizontal direction (step S202: No), the process proceeds to step S204. In step S203, the control unit 11 corrects the road data in the horizontal direction in the link based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 corrects the road data in the horizontal direction of the map data, based on the traveling locus data of the probe information. Then, the process proceeds to step S204.

  In step S204, the control unit 11 determines whether or not there is a problem with the inclination data possessed by the map data, based on the probe information when the reroute occurs in the link to be processed. In one example, the control unit 11 compares the data of the tilt angle that the probe information has (data of the tilt angle detected by the acceleration sensor in the self-supporting positioning device 24) with the tilt data that the map data has. , It is determined whether there is a problem in inclination data. In this example, the control unit 11 determines that the inclination data is incorrect, when the data of the inclination angle of the probe information is different from the inclination data of the map data.

  In another example, whether or not there is a problem in the inclination data depending on whether or not the inclination determination as described above is performed in the navigation device 2 without using the data of the inclination angle included in the probe information. Determine In this example, the navigation device 2 transmits information (tilt determination information) indicating that the tilt determination has been performed to the server device 1 when the tilt determination is performed, and the control unit 11 of the server device 1 determines the tilt It is determined that the tilt data is incorrect if the information indicates that the event has been performed. The tilt determination information may be included in the probe information.

  If there is a problem in the tilt data (step S204: Yes), the process proceeds to step S205, and if there is no problem in the tilt data (step S204: No), the process proceeds to step S206. In step S205, the control unit 11 corrects the inclination data in the link based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 corrects the inclination data included in the map data based on the data of the inclination angle included in the probe information. Then, the process proceeds to step S206.

  In step S206, the control unit 11 determines whether or not there is a problem in the restriction data included in the map data, based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 determines whether or not there is a problem in the regulation data based on the traveling locus data that the probe information has and the content of the traffic regulation in the regulation data that the map data has. For example, although the traffic data in the regulation data indicates that the right turn is prohibited (in this case, a route is set such that straight or right turn is made), the travel locus data indicates the vehicle 3 Indicates that the vehicle is turning to the right, the control unit 11 determines that the restriction data is incorrect (the same applies to a left turn prohibition, a straight movement prohibition, etc.). Also, for example, although the restriction data indicates that the road is not particularly subjected to traffic restrictions such as one-way traffic or closed roads (in this case, a route is set to drive the road) And the traveling locus data indicates that the vehicle 3 travels to bypass the road, the control unit 11 determines that the restriction data is incorrect.

  If there is a problem with the restriction data (step S206: Yes), the process proceeds to step S207, and if there is no problem with the restriction data (step S206: No), the process proceeds to step S208.

  In step S207, the control unit 11 corrects restriction data in the link (which may include a node) based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 corrects the restriction data included in the map data based on the traveling locus data included in the probe information. For example, although the travel locus data indicates that the vehicle 3 is turning right even though the traffic data in the restriction data indicates that the right turn is prohibited, the control unit 11 turns right Correct the restriction data to eliminate traffic restrictions such as prohibition (the same applies to left turn prohibition and straight line prohibition etc). Also, for example, even though the restriction data indicates that the road is not particularly attached with traffic restrictions such as one-way traffic or closed roads, the traveling locus data is such that the vehicle 3 bypasses the road. If it indicates that the vehicle is traveling, the control unit 11 corrects the restriction data so as to add a traffic restriction such as one-way traffic or closed traffic. After the above step S207, the process proceeds to step S208.

  In step S208, the control unit 11 determines whether or not there is a problem in the guidance data of the map data, based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 determines whether or not there is a problem in the guidance data, based on the traveling locus data that the probe information has and the content of the guidance data that the map data has. For example, when the traveling locus data indicates that the vehicle 3 has traveled in a direction different from the guidance direction indicated by the guidance data (in this case, a route is set to advance in the guidance direction indicated by the guidance data) Control unit 11 determines that the guidance data is incorrect.

  If there is a problem in the guidance data (step S208: Yes), the process proceeds to step S209. If there is no problem in the guidance data (step S208: No), the process proceeds to step S210.

  In step S209, the control unit 11 corrects the guidance data in the link (which may include a node) based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 corrects the guidance data included in the map data based on the traveling locus data included in the probe information. For example, when the travel locus data indicates that the vehicle 3 has traveled in a direction different from the guidance direction indicated by the guidance data, the control unit 11 corrects the guidance direction indicated by the guidance data in the direction in which the vehicle 3 travels Do. In this case, the control unit 11 also corrects image data such as characters and illustrations. Then, the process proceeds to step S210.

  In step S210, the control unit 11 determines whether there is a problem in the traffic congestion data included in the map data, based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 determines whether or not there is a problem in the traffic congestion data, based on the traveling locus data that the probe information has and the content of the traffic congestion data that the map data has. For example, even though the traffic congestion data indicates that the road is experiencing traffic congestion, the travel locus data indicates that the vehicle 3 is traveling on the road (that is, basic In particular, based on the traffic congestion data, a route not using the road where traffic congestion occurs is set, but it is considered that traffic congestion occurs without the vehicle 3 traveling on the road on the route When traveling on the road), the control unit 11 determines that the traffic congestion data is incorrect.

  If there is a problem in the traffic jam data (step S210: Yes), the process proceeds to step S211, and if there is no problem in the traffic jam data (step S210: No), the process ends.

  In step S211, the control unit 11 corrects the traffic congestion data in the link based on the probe information when the reroute occurs in the link to be processed. Specifically, the control unit 11 corrects the congestion data included in the map data based on the traveling locus data included in the probe information. For example, even though the traffic congestion data indicates that the traffic is occurring on the road, the traveling locus data indicates that the vehicle 3 is traveling on the road. Modify the congestion data to indicate that the road is not jammed. Then, the process ends.

  According to the processing flow shown in FIG. 6 described above, it is possible to efficiently and appropriately determine an error in map data, and to correct an erroneous map data appropriately.

  In addition, in the above, the value of “number of reroutes / number of route travels” is obtained for each arbitrary link (one link or a predetermined link group including a plurality of links including the link), “number of reroutes / number of route travels” Although the map data error is determined only for links whose value of is greater than or equal to a predetermined value, "a predetermined number of links including a plurality of links including links" will be described in more detail.

  For example, as described above, when the control unit 21 is set to reroute when the vehicle 3 is separated by 50 m or more from the originally set route, the vehicle 3 goes out of the route until the reroute occurs. When it takes time, it may be required to appropriately cope with the case where the cause of the reroute is not the link where the vehicle 3 is located at that time but the link around it. As a more concrete example, when the link length is 50 m or less, the link between the vehicle and the link is different at the time of reroute and the link is incorrect. It is the case. In such a case, by detecting a link group including a plurality of links connected to the link where the vehicle 3 is located, it is possible to detect a link having an error in the map data without exception.

  Furthermore, even if the link is not connected to the link where the vehicle 3 is located, the link located around the link can be included in the link group. According to this, when new terrain or road data is changed due to construction work, etc., it is possible to simultaneously detect map data related to peripheral links as links to be corrected.

[Modification]
In the above, although the Example which judges a reroute based on the reroute information from the navigation apparatus 1 was shown in the server apparatus 1 side, limitation is not carried out to this. That is, it is possible to determine reroute on the server device 1 side without using the reroute information. In another example, the server device 1 acquires data of a route set in the navigation device 1 as probe information, and determines whether the vehicle 3 is traveling on a road on the route, It is possible to determine whether or not a reroute has occurred in the navigation device 1. In this example, the server device 1 compares the traveling locus data included in the probe information with the road data in the horizontal direction for the set route, thereby determining whether the vehicle 3 travels the road on the route If the vehicle 3 is not traveling on the road on the route, it can be determined that a reroute has occurred. Then, the server device 1 can obtain the value of “the number of reroutes / the number of route travels” described above based on the reroute determined as described above.

  Moreover, although the example which uses the data of the inclination angle in the pitch direction in a road as inclination data was shown above, it is not limited to this. In another example, data on the altitude of the road or data indicating whether the road is uphill or downhill can be used as the slope data. When using altitude data as tilt data, it is possible to determine whether or not there is a problem with tilt data by comparing the height detected by the GPS receiver 23 with the height as the tilt data. . On the other hand, when data indicating whether the road is uphill or downhill is used as the slope data, a condition such as whether the vehicle 3 is moving up or down by the acceleration sensor in the self-supporting positioning device 24 Is detected, and the state of the vehicle 3 detected is compared with the slope of the road (uphill slope or downhill slope) indicated by the slope data to determine whether there is a problem with the slope data. In addition, even in the case of using tilt data according to such another example, the above-described tilt determination can be performed in the same manner (see, for example, FIG. 3). It can also be determined whether or not there is.

  The present invention is not limited to the application to the general navigation device 2 but can be applied to PND (Portable Navigation Device). Furthermore, the present invention can be applied to a portable terminal device such as a smartphone having a navigation function.

  As described above, the embodiment is not limited to the above-described embodiment, and can be modified as appropriate without departing from the scope or spirit of the invention which can be read from the claims and the entire specification.

REFERENCE SIGNS LIST 1 server device 2 navigation device 3 vehicle 11, 21 control unit 12, 22 storage unit 13, 26 communication unit 23 GPS receiver 24 self-supporting positioning device

Claims (1)

A server device for collecting probe information transmitted from a plurality of navigation devices, comprising:
A server apparatus comprising: determining means for determining an error in map data of a place where the reroute has occurred, based on the probe information when the reroute has occurred in the navigation device.

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