JP2009276228A - Apparatus, method, and program for controlling display position of moving object - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably line up roads to be matched upon the passage through intersections at appropriate positions as candidates. <P>SOLUTION: A route search guidance apparatus 10 generates matching candidate location information having the prescribed positions of all branching road links as matching candidate positions when a moving object has passed an intersection (steps S106, S107); removes matching candidate positions which the moving object can not reach on the basis of the moving mode of the moving object after having passed the intersection (steps S108, S109); selects, as candidate positions, positions of which the distances from a matching candidate position of the last time are the same as a navigation distance determined on the basis of the amount of displacement in a GPS position; and performs such control as to display a position on a road link of a position closest from a positioning position among the matching candidate positions set as matching candidate location information as a current location of the moving object. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile body position display control device, a mobile body position display control method, and a mobile body position display that perform control for displaying a current position of a mobile body using a GPS signal on a road map displayed on an image display device. It relates to the control program.

  Conventionally, a navigation system is known as a system for supporting the arrival of a moving body such as a vehicle or a human at a destination. For example, this navigation system derives the current position of the moving object by GPS (Global Positioning System), obtains a recommended moving route by route search processing based on the current position information of the moving object and road map information, and this recommended Based on the travel route, automatic travel route guidance (hereinafter referred to as “route guidance”) is performed. For example, in a vehicle equipped with a car navigation device, road map information and current position information of the vehicle are displayed on a display device (monitor), and a recommended travel route to a destination is searched and displayed on the display device. To display the directions visually. Some car navigation devices have a function of notifying a route by hearing by outputting a guidance voice.

  In such a car navigation device, in the route guidance process, the current position of the moving object is not displayed on the road map as it is based on the current position information of the moving object derived by GPS or the like. In some cases, a map matching process for finely adjusting and displaying the current position of the moving body is performed so that the current position of the moving body is displayed (see, for example, Patent Documents 1-3).

JP 2008-032500 A JP 2006-292665 A Japanese Patent Laid-Open No. 2006-266928

  However, in the conventional car navigation apparatus, in the map matching algorithm at the branch at the intersection, if an incorrect neighboring link is set as a matching target after passing through the intersection, the correct road link cannot be matched thereafter. There was a problem that a problem might occur.

  An object of the present invention is to solve the above-described problems and to ensure that a road to be matched when passing through an intersection can be reliably listed as a candidate at an appropriate position.

  The mobile object position display control device of the present invention is a mobile object position display control device that performs control to measure and display the current position of a mobile object using a GPS signal on a road map displayed on an image display device, Matching candidate positions where the predetermined positions of all road links branched from the intersection when the moving body travels a navigation distance determined from the displacement amount of the GPS position are used as matching candidate positions. Matching candidate position information generating means for generating information, and after the moving body passes the intersection, based on the moving mode of the moving body, among the matching candidate positions set as the matching candidate position information, Unreachable candidate position specifying means for specifying a matching candidate position where the moving object is not reachable, and the unreachable candidate position specifying means A position determined by candidate position excluding means for excluding the identified matching candidate position from the matching candidate position information, position information indicating the positioning position of the moving object measured by the GPS positioning device, and road map information. The matching candidate position information generating means is configured such that the distance from the previous matching candidate position is GPS for all road links branched from the intersection. A position that is the same as the navigation distance obtained from the displacement amount of the position is set as a matching candidate position, and the display control means is such that the moving body is located in the matching candidate position set as the matching candidate position information. The position on the road link of the matching candidate position with the highest probability as the current position of the mobile object And performing Shimesuru control.

  The unreachable candidate position specifying unit may be configured to specify a matching candidate position having no reachability based on a moving distance and a moving direction which are movement modes of the moving body after passing the intersection. Good.

  The mobile body position display control method of the present invention is a mobile body position display control method for performing control for positioning and displaying the current position of a mobile body using a GPS signal on a road map displayed on an image display device. Then, when the moving body moves through the navigation distance obtained from the displacement amount of the GPS position and passes through the intersection, the matching is performed with the predetermined positions of all the road links branched from the intersection as the matching candidate positions. Matching candidate position information generation processing for generating candidate position information, and after the moving body passes through the intersection, based on the movement mode of the moving body, each matching candidate position set as the matching candidate position information Among these, the unreachable candidate position specifying process for specifying a matching candidate position where the mobile object is not reachable, and the unreachable candidate position characteristic A candidate position exclusion process for excluding the matching candidate position specified in the process from the matching candidate position information, a position determined by the position information indicating the positioning position of the mobile body measured by the GPS positioning device and the road map information. Display control processing for performing control to display as the current position of the mobile body, and in the matching candidate position information generation processing, for all road links branched from the intersection, respectively, from the previous matching candidate position A position where the distance is the same as the navigation distance obtained from the displacement amount of the GPS position is set as a matching candidate position, and in the display control process, the moving body is positioned among the matching candidate positions set as the matching candidate position information. The position on the road link of the matching candidate position with the highest probability of And performing control to display as the position.

  Further, the mobile body position display control program of the present invention is a mobile body position display control for executing control for positioning and displaying the current position of the mobile body using a GPS signal on a road map displayed on the image display device. A program that, when the moving body travels a navigation distance obtained from the displacement of the GPS position, causes the computer to determine a predetermined position of each road link that branches from the intersection when the vehicle has passed the intersection. Matching candidate position information generation processing for generating matching candidate position information as a matching candidate position, and after the moving body has passed the intersection, the moving body of the moving body is set as the matching candidate position information. Of the matching candidate positions that are not reachable by the mobile object. A candidate position specifying process; a candidate position excluding process that excludes the matching candidate position specified in the unreachable candidate position specifying process from the matching candidate position information; and a position that indicates the positioning position of the mobile body that is measured by the GPS positioning device. Display control processing for performing control to display the position determined by the information and the road map information as the current position of the mobile object, and in the matching candidate position information generation processing, all the branches from the intersection For each road link, a process is executed in which the position where the distance from the previous matching candidate position is the same as the navigation distance obtained from the displacement amount of the GPS position is the matching candidate position. The probability that the moving object is located among the matching candidate positions set as the position information is Also it is intended for executing a process for controlling display of the position on the road link high matching candidate position as the current position of the movable body.

  According to the present invention, a road to be matched when passing an intersection can be surely listed as a candidate at an appropriate position.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration example of a car navigation system including a route search guidance device (moving body position display control device) 10 according to an embodiment of the present invention. FIG. 2 is a block diagram showing a configuration example of the route search guidance apparatus 10 according to one embodiment of the present invention.

  As shown in FIG. 1, the car navigation system of this example includes a route search guidance device 10, an own vehicle position positioning device 20, an output device 30, and an input device 40. The route search guidance device 10 has a route search function and a route guidance function, and is a device for performing a route guidance process so that the vehicle travels a recommended travel route obtained by the route search process. In the route guidance process, the vehicle position is displayed on the road link by map matching.

  The own vehicle position measurement device 20 is a device that measures the current position of the vehicle, and includes a GPS sensor that receives a GPS signal transmitted from a GPS satellite and measures a position based on the GPS signal.

  A GPS sensor is a so-called GPS receiver, receives a GPS signal radiated from a GPS satellite, measures a distance (pseudo distance) between the GPS satellite and the GPS receiver itself, and receives a plurality of satellites. Are simultaneously received to calculate the current position (GPS positioning solution) of the GPS receiver itself.

  In addition, the vehicle positioning device 20 is mounted on a vehicle, and performs processing such as decoding of the received GPS signal in addition to a GPS receiver (antenna) that receives the GPS signal, and outputs the signal to the output device 30. A part.

  The output device 30 is a device that outputs route guidance information from the route search guidance device 10, and for example, an image display device (display device, monitor) 31 that displays image information, and a voice output device that outputs voice information as voice ( Speaker device) 32. The image display device 31 displays the road map information and the current position information of the vehicle on the display screen, and also displays the recommended travel route to the destination on the display screen, thereby visually informing the route. . In addition, the voice output device 32 outputs the guidance voice information as a voice, thereby informing the route of the moving route by hearing.

  The input device 40 is an input device that gives various instructions to the route search guidance device 10. In this example, the input device 40 is configured by, for example, operation buttons displayed on the display screen of the output device 30.

  As shown in FIG. 2, the route search guidance device 10 includes a guidance route information storage unit F1, an intersection information storage unit F2, a map information storage unit F3, a route search unit 11, and a vehicle position information reception unit 12. , An intersection monitoring unit 13, a branch processing unit 14, a route guidance unit 15, and a control unit 16. In addition, each part which comprises the route search guidance apparatus 10 is connected to the bus | bath 17 which transmits a control signal, data, etc.

  The route search guidance device 10 is configured by an information processing device such as a mobile personal computer, a PND (Portable Navigation Device), a dedicated device, or a mobile phone. Although not shown, the route search guidance device 10 includes a CPU (Central Processing Unit), a program storage unit, an OS (Operating System), and the like. The CPU has a function of controlling and controlling each component of the route search guidance device 10 according to a computer program stored in the program storage unit and executing a program process. The program storage unit is a storage medium configured with a ROM, a RAM, or the like, and stores various computer programs used by the route search guidance device 10.

  The guide route information storage unit F1 is guide route link information for specifying a link indicating each road constituting the recommended travel route obtained by the route search unit 11, and its position information (hereinafter referred to as “guide route link position information”). .) Are stored in association with each other.

  FIG. 3 is a diagram illustrating an example of information stored in the guidance route information storage unit F1. For example, in the guide route information management file shown in FIG. 3, link ID (ID that can uniquely identify a road) as guide route link information and position information (specified by coordinates and vectors) of this guide route link. Are associated with each other to form a file. Therefore, the road information (link ID) on the road is known from the position information on the guide route by this guide route information management file.

  The intersection information storage unit F2 is a storage medium that stores intersection information indicating various information related to the intersection. FIG. 4 is a diagram illustrating an example of information stored in the intersection information storage unit F2. For example, in the intersection information management file shown in FIG. 4, node information (node ID) and a plurality of entry link information (link ID) are associated with each other, and the entry link information and a plurality of exit link information (link ID) Are further associated with each other, and road marking information is associated with each exit link information to form a file.

  Therefore, by this intersection information management file, from the node information, the approach link information, and the exit link information, the exit link (road link after passing the intersection) associated with each entrance link to the predetermined node, and the exit link The corresponding road marking information can be understood.

  The map information storage unit F3 is a storage medium that stores map information divided into rectangular ranges (hereinafter referred to as “mesh”) divided by a certain latitude width and longitude width. In addition to being stored in the map information storage unit F3, the map information can be stored in an auxiliary storage device as a removable medium called an SD memory card, a CD-ROM, a DVD-ROM, or the like. Further, the map information may be downloaded via a communication network such as the Internet.

  The route search unit 11 performs route search processing for calculating a recommended travel route from a departure position (for example, current position) to a destination. For example, the route search unit 11 receives an input of destination information from the user, specifies the position information of the destination based on the received destination information, and uses the position information of the destination and the vehicle position measurement device 20. Based on the measured current position information, road map information necessary to reach the destination from the current position is specified with reference to the map information. In addition, the route search unit 11 calculates a recommended travel route to the destination and generates a travel route surrounding map including a road map including the recommended travel route. In addition, since a well-known technique is used about a route search process, detailed description here is abbreviate | omitted.

  The own vehicle position information receiving unit 12 performs a process of receiving the current position information of the vehicle. Here, the current position is constituted by latitude and longitude, for example. This current position information is measured and transmitted by the own vehicle position measurement device 20.

  Based on the intersection information and the current position information, the intersection monitoring unit 13 executes processing for monitoring whether or not the vehicle has approached the intersection and whether or not the vehicle has passed through the intersection.

  The branch processing unit 14 executes generation of matching candidate position information, processing for specifying branch positions by excluding branch candidates that are not reachable.

  The route guiding unit 15 executes a process for guiding the route of the moving route based on the recommended moving route derived by the route searching unit 11. Further, the route guidance unit 15 compares the current position of the vehicle indicated by the current location information received by the host vehicle location information receiving unit 12 with the road map used for route guidance, and matches the road link to be matched. If there is a road link to be matched, a map matching process for changing the current position of the vehicle on the road link is executed. In addition, since a well-known technique is used about a route guidance process, detailed description here is abbreviate | omitted.

  The control unit 16 includes a CPU, a ROM, a RAM, and the like. The control unit 16 controls each component of the route search guidance device 10 and executes the process.

  Here, an example of the display mode of the display screen of the image display device 31 in the car navigation system of this example will be described. In FIG. 5, the road map and the current position of the vehicle are displayed on the display of the image display device 31. Therefore, when route search processing is performed, route guidance for visually informing the route is performed by searching for a recommended travel route to the destination and displaying it on the display.

  Next, the operation of the car navigation system according to the embodiment of the present invention will be described. FIG. 6 is a flowchart illustrating an example of route search guidance processing executed by the route search guidance device 10 of this example. In FIG. 6, it is assumed that processing not related to the present invention may be omitted.

  In the route search guidance process, first, when the route search unit 11 receives a destination setting (step S101), the current position indicated by the current position information received by the vehicle position information reception unit 12 from the vehicle position measurement device 20 is shown. The recommended travel route from the destination to the accepted destination is derived (step S102). At this time, in response to deriving the recommended travel route, the route search unit 11 updates the guide route information management file stored in the guide route information storage unit F1 to the one corresponding to the recommended travel route derived.

  Next, the route guidance unit 15 starts route guidance based on the recommended travel route information derived by the route search unit 11 (step S103).

  When the route guidance is started, the intersection monitoring unit 13 determines the navigation distance of the own vehicle from the displacement amount of the GPS position (the change amount of the position information received by the own vehicle position information receiving unit 12 from the own vehicle position measuring device 20). Navigation measured at step S104, extracted from the intersection information storage unit F2 at intersection information of intersections that may pass, and measured at step S104 from the previous matching position (position matched by the previous map matching process) It is confirmed whether or not there is an intersection until the distance is advanced (step S105).

  If there is an intersection before the traveling distance measured in step S104, the branch processing unit 14 refers to the intersection information, identifies the road link that branches after passing the intersection, and for all the road links. Matching candidate position information specifying the matching candidate position advanced by the navigation distance from the previous matching candidate position is generated (step S106).

  For example, when the mobile body is moving on the road link L1 toward the intersection node N as shown in FIG. 7, the branch processing unit 14 determines that the two road links L2 branch after passing the intersection in step S106. , L3, and for each road link L2, L3, a position where the distance from the previous matching candidate position (the previous matching position for the matched road link) is the navigation distance measured in step S104 ( Matching candidate position information in which the matching candidate positions A and B are set at the same distance from the node N at the intersection) is generated. FIG. 8 is an explanatory diagram illustrating an example of the matching candidate position information generated in step S106. The matching candidate position information is information in which the determined matching candidate position is set.

  If there is no intersection before the travel distance measured in step S104, the branch processing unit 14 determines that the distance from the previous matching candidate position (the previous matching position for the matched road link) is a step. The position advanced by the navigation distance measured in S104 is set as a new matching candidate position (step S107).

  Next, the branch processing unit 14 monitors whether there is a mobile object that is no longer reachable among the matching candidate positions set in the generated matching candidate position information (step S108). Then, when identifying an unreachable one, the branch processing unit 14 removes the identified matching candidate position from the matching candidate position information to exclude it from the matching candidate (step S109).

  Next, the route guidance unit 15 has the highest priority as the position where the own vehicle position is most likely to exist among the matching candidate positions set in the matching candidate position information generated by the branch processing unit 14. Map matching is performed using a road link including a matching candidate position as a matching target (step S110). In this example, for example, the matching candidate position with the closest positioning position indicated by the position information received by the own vehicle position information receiving unit 12 from the own vehicle position measuring device 20 is determined as the matching candidate position with the highest priority.

  Then, the route guidance unit 15 determines whether or not the guidance target moving body has reached the vicinity of the destination (step S111), and if not yet reached (N in step S111), the process proceeds to step S104. To do. The route guidance unit 15 ends the route guidance process when the mobile object to be guided reaches the vicinity of the destination (Y in step S111).

  In step S108, the branch processing unit 14 calculates the moving distance and moving direction of the moving object based on the displacement amount of the position measured by the own vehicle position measuring device 20, and calculates the result of the calculation and the position of each matching candidate position. First, it is monitored whether there is a matching candidate position where the reachability of the mobile object is lost, and the matching candidate position where the reachability is lost is specified. For example, when the moving mode of the moving object has changed from the right direction to the upward direction, the reachability may be reached when the matching candidate position changes from the right direction to the downward direction, or changes in the right direction. It is specified as a missing matching candidate position.

  As described above, by repeatedly executing the above-described steps S104 to S110, the reachable matching candidate positions are sequentially set, and the non-reachable matching candidate positions are excluded and remain. Matching is performed to the road link including the matching candidate position with the highest priority among the matching candidate positions.

  Specifically, when the moving body is moving on the road shown in FIG. 7, for example, as shown in FIG. 9, matching candidate positions C and D advanced by a predetermined navigation distance from the previous matching position; Three locations, the matching candidate position E that is a predetermined navigation distance away from the previous matching candidate position, are set as the matching candidate positions. The previous matching candidate position A set on the road link L2 is not used because the previous matching position exists on the road link L2.

  When the moving body further moves on the road, for example, as shown in FIG. 10, a matching candidate position G that has advanced a predetermined navigation distance from the previous matching position and a matching candidate position that has advanced a predetermined navigation distance from the previous matching candidate position. Three locations of F and H are set as matching candidate positions. The previous matching candidate position D set on the road link L5 is not used because the previous matching position exists on the road link L5.

  Then, when the moving body further moves on the road, for example, as shown in FIG. 11, a matching candidate position J that has advanced a predetermined navigation distance from the previous matching position and a matching that has advanced a predetermined navigation distance from the previous matching candidate position. The three candidate positions I and K are set as the matching candidate positions, and the matching candidate position K located in the moving direction different from the positioning result is excluded from the candidates.

  Further, when the moving body further moves on the road, for example, as shown in FIG. 12, a matching candidate position M that has advanced a predetermined navigation distance from the previous matching position and a matching that has advanced a predetermined navigation distance from the previous matching candidate position. Two positions with the candidate position L are set as the matching candidate positions, and the matching candidate position M located in the moving direction different from the positioning result is excluded from the candidates.

  In the above-described embodiment, the processing of steps S104 to S110 is performed during execution of the route guidance processing. However, even when the route guidance is not performed, when the vehicle position is displayed on the monitor, step S104 is performed. Steps S110 to S110 are repeatedly executed to sequentially set reachable matching candidate positions and exclude unreachable matching candidate positions. The highest priority among remaining matching candidate positions You may make it match with the road link containing a high matching candidate position.

  As described above, in the above-described embodiment, when the route search guidance device 10 passes through the intersection because the moving body has moved the navigation distance obtained from the displacement amount of the GPS position, the branch is made from the intersection. Matching candidate position information is generated with the predetermined positions of all the road links going as matching candidate positions (steps S106, S107), and after the moving body passes the intersection, matching is performed based on the moving mode of the moving body. Among each matching candidate position set as candidate position information, a matching candidate position where the mobile object is not reachable is specified and excluded from the matching candidate position information (steps S108 and S109), and the GPS positioning device (own vehicle) The position information indicating the positioning position of the moving body measured by the position positioning device 20) and the road map information It is configured to perform control to display the determined position as the current position of the moving body (display control of the moving body with respect to the image display device 31 by the route guidance unit 15), and for all the road links branched from the intersection, The position where the distance from the previous matching candidate position is the same as the navigation distance obtained from the displacement amount of the GPS position is set as the matching candidate position, and the moving object is located among the matching candidate positions set as the matching candidate position information. The position on the road link of the matching candidate position (for example, the position closest to the positioning position) with the highest probability of being displayed is controlled as the current position of the moving object, so matching is performed when passing through an intersection. There is an effect that the road that should be surely can be listed as a candidate at an appropriate position.

  In other words, if some road links are considered as matching candidates when branching, the excluded road links may be actual moving links, which may cause problems after that. It is configured to follow each road link and leave it as a candidate until it becomes clear that it is not reachable as a candidate for matching, and the road to be matched when passing through an intersection is definitely a candidate Can be mentioned.

  Moreover, in embodiment mentioned above, the route search guidance apparatus 10 specifies the matching candidate position with no reachability based on the moving distance and moving direction which are the movement modes of the moving body after passing the intersection. Therefore, the specific process can be performed quickly and easily.

  INDUSTRIAL APPLICABILITY The present invention is useful for application to devices that realize vehicle route guidance, electrical appliances such as car navigation devices that can display electronic maps, and the like.

It is a block diagram showing an example of composition of a car navigation system using a route search guidance device concerning an embodiment of the present invention. It is a block diagram which shows the structural example of a route search guidance apparatus. It is explanatory drawing which shows the example of a guidance route information management file. It is explanatory drawing which shows the example of an intersection information management file. It is explanatory drawing which shows the example of the display mode of the display screen of an image display apparatus. It is a flowchart which shows the example of the route search guidance process which a route search guidance apparatus performs. It is explanatory drawing which shows the specific example of the setting aspect of a matching candidate position. It is explanatory drawing which shows the example of matching candidate position information. It is explanatory drawing which shows the specific example of the setting aspect of a matching candidate position. It is explanatory drawing which shows the specific example of the setting aspect of a matching candidate position. It is explanatory drawing which shows the specific example of the setting aspect of a matching candidate position. It is explanatory drawing which shows the specific example of the setting aspect of a matching candidate position.

Explanation of symbols

  F1 guidance route information storage unit, F2 intersection information storage unit, F3 map information storage unit, 10 route search guidance device, 11 route search unit, 12 vehicle position information reception unit, 13 intersection monitoring unit, 14 branch processing unit, 15 route Guide unit, 16 control unit, 20 vehicle positioning device, 30 output device, 40 input device.

Claims (6)

A mobile object position display control device that performs control to measure and display the current position of a mobile object using a GPS signal on a road map displayed on an image display device,
Matching candidate positions where the predetermined positions of all road links branched from the intersection when the moving body travels a navigation distance determined from the displacement amount of the GPS position are used as matching candidate positions. Matching candidate position information generating means for generating information;
After the mobile body passes the intersection, a matching candidate position where the mobile body is not reachable among the matching candidate positions set as the matching candidate position information based on the movement mode of the mobile body Unreachable candidate position specifying means for specifying
Candidate position excluding means for excluding the matching candidate position specified by the unreachable candidate position specifying means from the matching candidate position information;
Display control means for performing control to display the position determined by the position information indicating the positioning position of the mobile body measured by the GPS positioning device and the road map information as the current position of the mobile body,
The matching candidate position information generating means matches, for all road links branched from the intersection, a position where the distance from the previous matching candidate position is the same as the navigation distance obtained from the displacement amount of the GPS position. Candidate positions
The display control means determines the position on the road link of the matching candidate position with the highest probability that the moving body is located among the matching candidate positions set as the matching candidate position information. The moving body position display control device characterized by performing control to display as The unreachable candidate position specifying unit specifies a matching candidate position having no reachability based on a moving distance and a moving direction that are movement modes of the moving body after passing through the intersection. Mobile body position display control device. A mobile body position display control method for performing control to measure and display a current position of a mobile body using a GPS signal on a road map displayed on an image display device,
Matching candidate positions where the predetermined positions of all road links branched from the intersection when the moving body travels a navigation distance determined from the displacement amount of the GPS position are used as matching candidate positions. Matching candidate position information generation processing for generating information;
After the mobile body passes the intersection, a matching candidate position where the mobile body is not reachable among the matching candidate positions set as the matching candidate position information based on the movement mode of the mobile body Unreachable candidate position identifying process for identifying
A candidate position exclusion process for excluding the matching candidate position specified in the unreachable candidate position specifying process from the matching candidate position information;
A display control process for performing control to display the position determined by the position information indicating the positioning position of the mobile body measured by the GPS positioning device and the road map information as the current position of the mobile body,
In the matching candidate position information generation process, for all road links branched from the intersection, matching is performed with positions where the distance from the previous matching candidate position is the same as the navigation distance obtained from the displacement of the GPS position. Candidate positions
In the display control process, the position on the road link of the matching candidate position with the highest probability that the moving body is located among the matching candidate positions set as the matching candidate position information is the current position of the moving body. As a moving object position display control method. The matching candidate position having no reachability is specified in the unreachable candidate position specifying process based on a moving distance and a moving direction that are movement modes of the moving object after passing through the intersection. Mobile body position display control method. A mobile body position display control program for executing control for positioning and displaying a current position of a mobile body using a GPS signal on a road map displayed on an image display device,
On the computer,
Matching candidate positions where the predetermined positions of all road links branched from the intersection when the moving body travels a navigation distance determined from the displacement amount of the GPS position are used as matching candidate positions. Matching candidate position information generation processing for generating information;
After the mobile body passes the intersection, a matching candidate position where the mobile body is not reachable among the matching candidate positions set as the matching candidate position information based on the movement mode of the mobile body Unreachable candidate position identifying process for identifying
A candidate position exclusion process for excluding the matching candidate position specified in the unreachable candidate position specifying process from the matching candidate position information;
A display control process for performing control to display the position determined by the position information indicating the positioning position of the mobile body measured by the GPS positioning device and the road map information as the current position of the mobile body;
In the matching candidate position information generation process, for all road links branched from the intersection, matching is performed with positions where the distance from the previous matching candidate position is the same as the navigation distance obtained from the displacement of the GPS position. Execute the process to be a candidate position,
In the display control process, the position on the road link of the matching candidate position with the highest probability that the moving body is located among the matching candidate positions set as the matching candidate position information is the current position of the moving body. A moving body position display control program for executing processing for performing control to display as a moving object. In the unreachable candidate position specifying process, a process for specifying a matching candidate position having no reachability based on a moving distance and a moving direction as a moving mode of the moving body after passing through the intersection is executed. The moving body position display control program according to claim 5.

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