JP6325998B2 - Pedestrian navigation device, pedestrian navigation method, computer program, and recording medium recording the computer program - Google Patents

Description

  The present invention relates to a pedestrian navigation device, a pedestrian navigation method, a computer program, and a recording medium recording the computer program.

In recent years, coupled with the spread of the Internet and mobile terminal devices, there has been an increasing demand for navigation technology for pedestrians for mobile terminal devices such as smartphones.
As a technique related to this, Patent Document 1 discloses that a road to be added to a pedestrian road among roads included in the vehicle road network data is determined, and a pedestrian to be added to the determined road. There is disclosed a pedestrian network generation device that generates pedestrian network data including data related to a road.
Reference should also be made to US Pat.

Japanese Patent Laid-Open No. 2004-301956 JP 2007-078655 A

The inventor has conducted intensive studies to provide more appropriate navigation for pedestrians. As a result, I noticed the following.
In conducting a pedestrian route search, it is naturally desirable to use a pedestrian road network. On the other hand, there is a range where a road network for pedestrians has not yet been developed. And about the range where the road network for pedestrians is not maintained in this way, route search will be performed using the road network for vehicles.
Here, the range using the vehicle network is route-guided on the premise that the vehicle travels on the road. As shown in FIG. 1A, for example, guidance to turn right at an intersection N according to a guidance route R is a point such as 100m (guidance point G1), 50m (guidance point G2), 10m (guidance point G3) before the intersection. May be performed in order. In other words, when performing guidance to turn right at an intersection, the guidance point G1 is “to the right in the future”, the guidance point G2 is “the next intersection is right”, the guidance point G3 is “10m ahead is right”, and the guidance When the point G3 is already located within the intersection, guidance such as “This intersection is right” is performed.

A case where guidance for pedestrians is performed using the vehicle road network data will be described with reference to FIG. As shown in FIG. 1B, based on the vehicle road network data, when the same guidance as described above is given to the pedestrians at the guidance points G1 to G3, “this intersection at the nearest guidance point G3. The “right” guidance will be performed at the position corresponding to the guidance point G3, that is, when the pedestrian is located in the middle of the pedestrian crossing A, which may give the pedestrian a sense of incongruity. In addition, when a pedestrian makes a right turn along a sidewalk without crossing a right turn road, the pedestrian makes a right turn without reaching the position corresponding to the guide point G3. It becomes guidance. In addition, it was found that the situation in which the guidance using the vehicle road network data gives a sense of discomfort to the pedestrian occurs when the road width of the right turn road is a large road such as 30 m. .
Therefore, when the route searched for for a pedestrian includes a route portion using the vehicular road network, the inventor is an intersection included in the route portion and is associated with a guide point. The idea was to extract an intersection and correct the position of the guide point based on the road attribute of the intersection that intersects the approach road at the intersection. By correcting the position of the guide point in this way, it is possible to perform intersection guidance at a timing that is comfortable for pedestrians even in the route portion using the vehicle road network, and the current position of the pedestrian is guided. By turning right at the guidance target intersection without arriving at the point, it is possible to avoid skipping the intersection guidance nearest to the guidance target intersection.

The present invention has been made in view of the above-mentioned problems, and the first aspect is defined as follows. That is,
A pedestrian navigation device that performs route guidance for pedestrians using at least part of the vehicle road network data,
A storage unit for storing road network data for vehicles, including the position of a guide point as a point for guiding an intersection;
With reference to the storage unit, a route search unit for searching for a route from the current position of the mobile terminal device or the departure place to the destination;
In the searched route, an authorization unit for authorizing a route portion searched using the vehicle road network data;
An extraction unit that extracts an intersection associated with the guide point among intersections included in the certified route portion as a guide target intersection;
An acquisition unit that acquires road attributes of an intersection that intersects an approach road to the extracted guidance target intersection in the certified route portion;
Based on the acquired road attribute, a correction unit that corrects the position of the guidance point associated with the guidance target intersection;
A pedestrian navigation device comprising:

  According to the navigation device for pedestrians defined in the first aspect defined in this way, in the pedestrian guidance route using at least a part of the vehicle road network data, the vehicle road network data is used. The route portion searched for the route is recognized, and the position of the guide point that guides the intersection associated with the intersection of the route portion is corrected based on the road attribute of the intersection that intersects the approach road to the intersection. To do. By using the guidance points corrected in this way, even when pedestrian guidance is performed using vehicle road network data, intersection guidance can be performed at a timing that is comfortable for pedestrians. Moreover, it is avoided that the intersection guidance nearest to the guidance target intersection is skipped by turning right at the guidance target intersection without the current position of the pedestrian reaching the guidance point.

  The road attribute is a road width or the number of lanes, and the correction unit can correct the position of the guide point based on the road width or the number of lanes (second aspect). In order to perform the intersection guidance at an appropriate timing for the pedestrian, it is necessary to perform the guidance while the pedestrian is located on the approach path to the intersection. Therefore, when the road width of the crossing road is wide, the correction width of the guide point is largely moved forward in the traveling direction compared to the case where the road width is narrow. By correcting the guidance point for intersection guidance in this way, it is possible to perform intersection guidance at a timing that is comfortable for pedestrians, and turn right at the intersection to be guided without the pedestrian's current position reaching the guidance point. By doing so, it is avoided that the intersection guidance nearest to the guidance target intersection is skipped.

  Further, when the road attribute is road width, the correction unit moves the position of the guide point by a distance of 1/2 of the acquired road width before the traveling direction on the searched route. By doing so, the position of the guide point can be corrected (third aspect). Usually, the guide point is often calculated from the center position of the intersection. Therefore, if ½ of the road width is moved to the front side of the approach path, the guidance point can be corrected to be positioned on the approach path. In this way, if the guidance point is located on the approach road, it is possible to perform the intersection guidance when the pedestrian is located on the approach road, so it is possible to perform the intersection guidance at a timing that is comfortable for the pedestrian, By turning right at the guidance target intersection without the current position of the pedestrian reaching the guidance point, it is possible to avoid skipping the nearest intersection guidance.

The fourth aspect of the present invention is defined as follows. That is,
It is a pedestrian navigation method that performs route guidance for pedestrians using at least a part of the vehicle road network data, and is a pedestrian navigation method realized as a function of a computer,
A storage step of storing vehicular road network data in a storage unit, including a position of a guide point as a point for guiding an intersection;
A route search step for searching for a route from the current position of the mobile terminal device or the departure point to the destination with reference to the storage unit;
An authorization step for authorizing a route portion searched using the vehicle road network data in the searched route; and
An extraction step of extracting an intersection associated with the guide point as a guide target intersection among the intersections included in the certified route portion; and
An acquisition step in which the acquisition unit acquires a road attribute of an intersection that intersects with the extracted approach road to the guidance target intersection in the certified route portion;
A correction unit that corrects the position of the guidance point associated with the guidance target intersection based on the acquired road attribute;
A pedestrian navigation method comprising:
According to the invention of the fourth aspect defined as described above, the same effect as that of the first aspect can be obtained.

The fifth aspect of the present invention is defined as follows. That is,
In the method defined in the fourth aspect, the road attribute is road width or lane number,
In the correction step, the position of the guide point is corrected based on the road width or the number of lanes.
According to the fifth aspect of the invention thus defined, the same effects as those of the second aspect can be achieved.

The sixth aspect of the present invention is defined as follows. That is,
In the method defined in the fourth aspect, the road attribute is road width,
In the correction step, the position of the guide point is moved by a distance of ½ of the acquired road width before the traveling direction on the searched route.
According to the sixth aspect of the invention thus defined, the same effect as the third aspect can be obtained.

Furthermore, the seventh aspect of the present invention is defined as follows. That is,
A computer program for navigation for pedestrians that performs route guidance for pedestrians using at least part of road network data for vehicles,
Storage means for storing road network data for vehicles, including the position of a guide point as a point for guiding an intersection;
With reference to the storage means, route search means for searching for a route from the current position of the mobile terminal device or the departure place to the destination;
In the searched route, an authorization means for authorizing a route portion searched using the vehicle road network data;
An extraction means for extracting an intersection associated with the guide point among intersections included in the certified route portion as a guide target intersection;
An obtaining means for obtaining a road attribute of an intersection that intersects an approach road to the extracted guidance target intersection in the certified route portion;
Correction means for correcting the position of the guidance point associated with the guidance target intersection based on the acquired road attribute;
A computer program that functions as a computer program.
According to the seventh aspect of the invention thus defined, the same effect as the first aspect can be obtained.

The eighth aspect of the present invention is defined as follows. That is,
In the computer program defined in the seventh aspect, the road attribute is road width or lane number,
The correction means corrects the position of the guide point based on the road width or the number of lanes.
According to the invention of the eighth aspect defined as described above, the same effect as that of the second aspect can be obtained.

The ninth aspect of the present invention is defined as follows. That is,
In the computer program defined in the seventh aspect, the road attribute is road width,
The correction unit moves the position of the guide point by a distance of ½ of the acquired road width before the traveling direction on the searched route.
According to the ninth aspect of the invention thus defined, the same effect as the third aspect can be obtained.

  A computer-readable recording medium in which a computer program defined in any of the seventh to ninth aspects is recorded is defined as a tenth aspect.

FIG. 1 explains (A) intersection guidance for route guidance to vehicles using vehicle road network data, and (B) intersection guidance for route guidance to pedestrians using vehicle road network data. It is a schematic diagram for doing. FIG. 2 is a block diagram showing a configuration of the navigation device 1 according to the embodiment of the present invention. FIG. 3 is a flowchart showing an example of the operation of the navigation device 1 according to the embodiment of the present invention. 4A is a schematic diagram for explaining a route part recognition method, a guidance target intersection extraction method, and a road attribute acquisition method for an intersection, and FIG. 4B is a correction method for correcting the position of a guidance point. It is a schematic diagram for demonstrating. FIG. 5 is a block diagram showing a configuration of the navigation device 100 according to the embodiment of the present invention.

A navigation device according to an embodiment of the present invention will be described.
FIG. 2 shows a schematic configuration of the navigation device 1.
As shown in FIG. 2, the navigation device 1 includes a pedestrian road network database (pedestrian road NW-DB) 3, a vehicle road network database (vehicle road NW-DB) 5, a route search unit 7, A guidance route storage unit 9, a certification unit 11, an extraction unit 13, an acquisition unit 15, a correction unit 17, and a corrected guide point storage unit 18 are provided.

  The navigation device 1 can be used by being mounted on a mobile terminal device, for example. The mobile terminal device is not limited as long as it is a terminal that can be carried by a pedestrian and can be connected to a network such as the Internet. Examples of such mobile terminal devices include smartphones, smart TVs, smart books, tablet terminals, mobile phones, notebook PCs, PDAs (Portable Digital Assistants), portable game machines, PNDs (Portable Navigation Devices), and the like. . As another example, a server device that can communicate with a mobile terminal device may be used as a navigation system including the components of the navigation device 1. In this case, guidance to the mobile terminal device can be performed based on the information stored in the corrected guide point storage unit corrected by the navigation device 1 (server device) described later.

  In the vehicle road network database 5 as a storage unit, vehicle road network data including the position of a guide point as a point for guiding an intersection is stored. The vehicle road network data includes data on links and nodes that are connection points between links in addition to the positions of guide points. Here, in the vehicle road network database 3, roads on which vehicles such as highways, national roads, prefectural roads, municipal roads, and the like can pass are represented by links, and intersections are represented by nodes. For each link, a link number, a link cost used for route search, which will be described later, and the load required to pass the road represented by the link by a vehicle, the road width and the number of lanes of the link as a road attribute Are associated with each other. In addition, detailed information such as a link type may be associated. Examples of link types include highways, national roads, prefectural roads, municipal roads, and the like. These data are stored in association with the coordinates. The position of the guide point as the point for guiding the intersection is associated with the intersection. That is, when a guidance route searched by a route search unit described later indicates that a certain intersection is to be turned right, when the current position of the user reaches a guidance point associated with the intersection, a right turn guidance message, etc. Is output (see FIG. 1A). The number of guide points associated with one intersection is not limited to one. For example, two or more guide points are associated with one intersection such as a first distance before the intersection (for example, 100 m), a second distance before the intersection (for example, 50 m), and a third distance before the intersection (for example, 10 m). It may be done. In addition, a guidance message suitable for guiding an intersection at the guidance point may be associated with the guidance point. For example, a guidance message such as “This intersection is on the right” is associated with the guidance point located 10 m before the intersection. The guidance message may be stored in another memory unit so as to correspond to the distance from the intersection. For example, the message M1 is stored 100m before the intersection, the message M2 is stored 50m before the intersection, and the message M3 is stored 10m before the intersection. Then, when the current position of the mobile terminal device reaches the guidance point 100m before the intersection, the message M1 associated with 100m before the intersection is read from the memory unit, and the message M1 is output to the mobile terminal device. To do.

  The pedestrian road network database 3 stores pedestrian road network data. The pedestrian road network data includes a link representing a road through which a pedestrian can pass, and a node that is a connection point between the link and the link. The road through which pedestrians can pass is not particularly limited, but includes sidewalks, pedestrian crossings, and pedestrian bridges provided along various roads. Link numbers and link costs are also associated with the links in the pedestrian road network data, as in the vehicle road network data. In this case, the link cost represents the load required for the pedestrian to pass the sidewalk or the like represented by the link.

  The route search unit 7 refers to the pedestrian road network database 3 and the vehicle road network database 5 to find a route from the current position of the mobile terminal device provided with the navigation device 1 to the destination. Explore. A general method can be used as the route search method. For example, a route with the lowest link cost can be searched as a guide route based on the Dijkstra method. When searching for a guidance route from the current position to the destination, the route search unit 7 preferentially uses the pedestrian road network data for the range where the pedestrian road network data is prepared. It is preferable to use vehicular road network data for a range where the road network is not maintained. The searched guide route is stored in the guide route storage unit 9. At this time, information indicating which route network data is searched for using which road network data may be stored in association with each route portion included in the guide route. In addition, a guide point on the guide route may be associated with each coordinate or intersection in the guide route.

  The authorization unit 11 refers to the guidance route storage unit 9 and authorizes the route portion searched using the vehicle road network data in the guidance route searched by the route search unit 7. The authorization method is not particularly limited, but the vehicle road network data is obtained by associating information indicating that the vehicle road network data is searched for in each route portion of the guide route. It can be recognized that it is a route portion searched using. As another example, with reference to the vehicle road network database 5, when the link number of the link included in the guide route matches the link number in the vehicle road network data, the link is designated as the vehicle road network. The route portion searched using the data can be recognized. As yet another example, the authorization unit 11 refers to the pedestrian road network database 3 and links the vehicle route network that is located in an area where the pedestrian road network data is not maintained in the guide route. It can be recognized that the route portion is searched using data.

The extraction unit 13 extracts the intersection associated with the guidance point among the intersections included in the route portion certified by the certification unit 11 as the guidance target intersection. Although the said specific method is not specifically limited, It is preferable to extract the intersection where the left-right turn is shown by the said guidance route among the intersections with which the guidance point was linked | related. This is because the right / left turn guide at the intersection is an important guide in navigation.
The acquisition unit 15 refers to the vehicle road network database 5 and obtains the road attribute of the intersection that intersects the approach road to the guidance target intersection extracted by the extraction unit 13 in the route portion recognized by the recognition unit 11. get. The acquisition method is not particularly limited, but can be performed by reading road attributes associated with links corresponding to intersections from the vehicle road network database 5. Examples of the road attribute include road width and the number of lanes. Also, if there are multiple intersections that intersect the approach road, obtain the road width or number of lanes of the intersection with the largest road width or the intersection with the largest number of lanes, indicating the widest road. Just do it. As another example, in the guidance route searched by the route search unit 7, the road attribute of the link corresponding to the exit route from the guidance target intersection may be acquired.

  The correction unit 17 corrects the position of the guidance point associated with the guidance target intersection based on the road attribute acquired by the acquisition unit 15. The correction method is not particularly limited as long as the position of the guidance point can be corrected so that guidance regarding the guidance target intersection is performed at an appropriate timing for the pedestrian. For example, when the road attribute acquired by the acquisition unit 15 is the road width or the number of lanes, the correction unit 17 can correct the position of the guide point based on the acquired road width or the number of lanes. When the road attribute acquired by the acquisition unit 15 is road width, in particular, the correction unit 17 sets the position of the guide point to a distance of 1/2 of the acquired road width before the traveling direction in the guide route. By moving it, the position of the guide point can be corrected. By correcting in this way, it is possible to perform guidance for the guidance target intersection while the current position of the pedestrian is located on the approach path. In other words, when the pedestrian crosses the exit path, the guidance of the intersection of the guidance target is given to give the pedestrian a sense of incongruity or the current position of the pedestrian does not reach the guidance point By making a right turn at the intersection, it is possible to avoid skipping the nearest intersection guidance. The corrected position of the guide point is stored in the corrected guide point storage unit 18 in association with the guide target intersection or the guide point before correction.

An example of the operation of the navigation device 1 shown in FIG. 2 will be described with reference to FIG. This will be described below with reference to the schematic diagram shown in FIG.
First, in step 1, a current position specifying unit (not shown) specifies the current position of the mobile terminal device on which the navigation device 1 of the present invention is mounted.
In step 3, an input unit (not shown) receives an input of a destination for destination search.
In step 5, the route search unit 7 refers to the pedestrian road network data 3 and the vehicle road network data 5, and guides from the current position specified in step 1 to the destination that received the input in step 3. The route is searched and the guide route is saved. In FIG. 4A, the guide route is indicated by the symbol R.
In step 7, the certification | authentication part 11 authorizes the route part searched using the road network data for vehicles among the guidance routes searched in step 5. FIG. For example, among the links included in the guide route, a link associated with a link number matching the link number stored in the vehicle road network database 5 or a continuous link group is recognized as the route portion. . In FIG. 4A, the links L1 to L3 included in the dotted lines are recognized as route portions searched using the vehicle road network data.

In step 9, the extraction unit 13 extracts the intersection associated with the guidance point among the intersections included in the route portion recognized in step 7 as the guidance target intersection. For example, the guidance target intersection may be an intersection that requires a right or left turn in the guidance route. In FIG. 4A, the guide route R is a node indicating a right turn, and the node N1 associated with the signs G1 to G3 as the guide points is extracted as the guide target intersection. In this example, it is assumed that the node N2 in which the guide route R indicates straight ahead is not an extraction target.
In step 11, the acquisition unit 15 refers to the vehicle road network database 5, and at the guidance target intersection extracted in step 9, the road width of the intersection with the approach path that enters the guidance target intersection on the guidance route. To get. When there are a plurality of intersections, the road width of the intersection with the widest road width is acquired. In FIG. 4B, links L2 and L5 are specified as intersections intersecting with link L1 entering node N1, and road width 30m associated with each of links L2 and L5 is acquired as a road attribute. In this example, the road widths of the links L2 and L5 are both 30m and the same, but if they are different, one of the wide road widths may be acquired. Moreover, it is good also as limiting the link used as the object from which a road attribute is acquired to the link on a guidance route. That is, the link on this guide route is a link L2 corresponding to the exit route on the guide route shown in FIG.

  In step 13, the correction unit 17 guides the position of the guide point associated with the intersection extracted in step 9 by moving the distance of ½ of the road width acquired in step 11 forward in the traveling direction. Correct the position of the point and save the corrected guide point. That is, in FIG. 4B, the position of the guide point G3 is moved to G3 '(corrected guide point) on the link L1 in the forward direction by 15 m which is ½ of the road width. Here, although the guide points G1 to G3 are associated with the node N1, the positions of all the guide points may be corrected, or the positions of some of the guide points may be corrected. For example, as in a guide point G3 shown in FIG. 4B, only the guide points that are located on the roadway of the intersections L2 and L5 (for example, in the roadway area A) are corrected. Also good. The corrected guide point after correction may be stored in the corrected guide point storage unit 18 in association with the intersection. As another example, the guide point stored in the guide route storage unit 9 may be stored in the guide point. May be replaced with the corrected guide point.

In this example, the travel distance of the guide point is ½ of the road width, but may be a fixed distance (for example, 30 m). Further, when the acquired road attribute is four lanes on one side, the width corresponding to four lanes may be moved from the position of the guide point to the front in the traveling direction based on the number of lanes on one side.
Further, when the road width of the crossing road acquired in step 11 is less than the predetermined width, the position of the guide point in step 13 may not be corrected. If the road width of the intersection is narrow and the position of the guide point is ahead of the direction of travel from the road area A of the intersection, the pedestrian feels uncomfortable, such as guiding the intersection to the pedestrian crossing the intersection. This is because no guidance is given.

FIG. 5 shows a mobile terminal device 100 according to an embodiment of the present invention. 5, the same elements as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is partially omitted.
FIG. 5 shows a mobile terminal device 100 including the navigation device 1 shown in FIG. The mobile terminal device 100 includes a control unit 110, a memory unit 111, an input unit 112, an output unit 113, an interface unit 114, a current position specifying unit 115, a pedestrian road network database 3, a vehicle road network database 5, a route. A search unit 7, a guide route storage unit 9, a certification unit 11, an extraction unit 13, an acquisition unit 15, a correction unit 17, a corrected guide point storage unit 18, and a guide unit 117 are provided.

The control unit 110 is a computer device that includes a CPU, a buffer memory, and other devices, and controls other elements constituting the mobile terminal device 100.
A computer program is stored in the memory unit 111, and the computer program is read into the control unit 110, which is a computer device, and causes it to function. This computer program includes a built-in hard disk or built-in memory as a storage device of the navigation device, an SD (registered trademark) memory card, a memory stick, smart media, a compact flash (registered trademark), a DVD as a storage medium replaceable with the navigation device. Can be stored in a general-purpose medium such as In this example, each message related to the intersection guidance is stored in association with the intersection.
The input unit 112 is used, for example, for inputting a user command. Specifically, it is used for inputting a destination or the like in the route search. As the input unit 112, a mouse, a light pen, or a pointing device such as a touch panel that cooperates with display contents of a display, or a voice input device such as a keyboard or a microphone can be used.
The output unit 113 includes a display, a search screen for a destination search output when the mobile terminal device is used for general navigation, a map, and the mobile terminal device specified by the current position specifying unit 115. The position, the guidance route searched by the route search unit 117, the intersection guidance message at the guidance position, and other information are displayed. The output unit 113 may include a voice transmission unit and a vibration notification unit. In the former case, a message based on a command from a guide unit described later can be output by voice. In the latter case, similarly, notification by vibration can be performed at the timing of outputting a message based on a command from the guide unit. The notification by the vibration may be provided with a strength level of vibration intensity according to the proximity between the intersection and the guide point in order to perform detailed guidance by the pedestrian. In this case, if the guidance point is closer to the intersection and the vibration becomes stronger, the pedestrian can be more aware of guidance at the intersection.

The interface unit 114 connects the mobile terminal device 100 to a wireless network or the like.
The current position specifying unit 115 specifies current position information of the mobile terminal device 100 using a GPS device or a gyro device. In addition, the current time can be specified.
The functions of the pedestrian road network database 3 to the corrected guide point storage unit 18 are as described above.
The guide unit 117 refers to the guide route storage unit 9, the current position specifying unit 115, and the corrected guide point storage unit 18, and makes a mobile terminal for a guide target intersection that requires intersection guidance by making a right or left turn on the guide route. When the current position of the apparatus reaches the corrected guidance point associated with the guidance target intersection, the message associated with the guidance point corresponding to the corrected guidance point is guided. The message to be guided may be associated with a different message depending on the guidance point. For example, the first guide point that is farthest from the intersection “is ahead right”, the second guide point that is closer to the intersection than the first guide point is “the next intersection is to the right”, the third closest to the intersection A message such as “10m ahead is right” or “This intersection is right” may be guided at the guidance point. The guidance including such a message is output by display or voice via the output unit 113.

  The correction of the guidance point executed by the navigation device (mobile terminal device) may be performed in advance for the entire searched guidance route, for example. As another example, it may be executed each time during walking. In this case, the authorization unit recognizes whether the guide route within the predetermined direction of travel from the current location is a route portion searched using the vehicle road network data, based on the current location of the mobile terminal device, When it is determined that the route portion is searched using the network data, the processing after the extraction unit can be performed on the intersection nearest to the current position or the intersection included in the predetermined range.

  Although the embodiments and examples of the present invention have been described above, two or more of the embodiments (examples) may be combined and implemented. Alternatively, one of these embodiments (examples) may be partially implemented. Furthermore, among these, two or more embodiments (examples) may be partially combined.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications may be included in the present invention as long as those skilled in the art can easily conceive without departing from the description of the scope of claims.

1 100 Navigation device 3 Pedestrian road network database (pedestrian road NW-DB)
5 vehicle road network database (vehicle road NW-DB)
7 route search unit 9 guide route storage unit 11 authorization unit 13 extraction unit 15 acquisition unit 17 correction unit 18 corrected guide point storage unit

Claims (10)

Using pedestrian road network data and the vehicle road network data, a navigation device for performing route guidance,
A vehicular road network database in which vehicular road network data is stored, including the position of a guidance point as a point to guide an intersection;
A pedestrian road network database in which the pedestrian road network data is stored;
A route search unit for searching for a pedestrian, wherein the pedestrian road network data is preferentially used for a range where the pedestrian road network data is prepared, For a range that is not maintained, using the vehicle road network data, a route search unit that searches for a route from the current position of the mobile terminal device or the starting point to the destination,
In the searched route, an authorization unit for authorizing a route portion searched using the vehicle road network data;
An extraction unit that extracts an intersection associated with the guide point among intersections included in the certified route portion as a guide target intersection;
An acquisition unit that acquires road attributes of an intersection that intersects an approach road to the extracted guidance target intersection in the certified route portion;
Based on the acquired road attribute, a correction unit that corrects the position of the guidance point associated with the guidance target intersection;
A navigation device comprising: The road attribute is road width,
The correction unit corrects the position of the guide point based on the road width.
The navigation device according to claim 1. The road attribute is road width,
The correction unit moves the position of the guide point to a distance of 1/2 of the acquired road width before the traveling direction in the searched route.
The navigation device according to claim 1. A navigation method that provides route guidance using vehicle road network data and pedestrian road network data, and is a navigation method realized as a computer function,
Vehicular road network data storage step for storing vehicular road network data in a vehicular road network database, including the position of a guide point as a point for guiding an intersection;
A pedestrian road network data storage step for storing the pedestrian road network data in a pedestrian road network database;
As for the range where the route search unit has the pedestrian road network data maintained, the pedestrian road network data is preferentially used, and the range for which the pedestrian road network data is not maintained, Using the vehicle road network data, a route search step for searching for a pedestrian a route from the current position of the mobile terminal device or the starting point to the destination;
An authorization step for authorizing a route portion searched using the vehicle road network data in the searched route; and
An extraction step of extracting an intersection associated with the guide point as a guide target intersection among the intersections included in the certified route portion; and
An acquisition step in which the acquisition unit acquires a road attribute of an intersection that intersects with the extracted approach road to the guidance target intersection in the certified route portion;
A correction unit that corrects the position of the guidance point associated with the guidance target intersection based on the acquired road attribute;
A navigation method comprising: The road attribute is road width,
In the correction step, the position of the guide point is corrected based on the road width.
The navigation method according to claim 4. The road attribute is road width,
In the correction step, the position of the guide point is moved by a distance of ½ of the acquired road width before the traveling direction in the searched route.
The navigation method according to claim 4. A computer program for navigation that performs route guidance using road network data for vehicles and road network data for pedestrians,
Vehicular road network data storage means for storing vehicular road network data in a vehicular road network database, including the position of a guide point as a point for guiding an intersection;
Pedestrian road network data storage means for storing the pedestrian road network data in a pedestrian road network database;
A route search means for searching for a pedestrian, wherein the pedestrian road network data is preferentially used for a range where the pedestrian road network data is prepared, and the pedestrian road network data is For a range that is not maintained, using the vehicle road network data, a route search means for searching for a route from the current position of the mobile terminal device or the departure place to the destination;
In the searched route, an authorization means for authorizing a route portion searched using the vehicle road network data;
An extraction means for extracting an intersection associated with the guide point among intersections included in the certified route portion as a guide target intersection;
An obtaining means for obtaining a road attribute of an intersection that intersects an approach road to the extracted guidance target intersection in the certified route portion;
Correction means for correcting the position of the guidance point associated with the guidance target intersection based on the acquired road attribute;
A computer program that functions as a computer program. The road attribute is road width,
The correction means corrects the position of the guide point based on the road width.
The computer program according to claim 7. The road attribute is road width,
The correction means moves the position of the guide point to a distance of ½ of the acquired road width before the traveling direction on the searched route.
The computer program according to claim 7.   A computer-readable recording medium on which the computer program according to any one of claims 7 to 9 is recorded.

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