JP6888884B2 - Electronic devices, intersection guidance programs and intersection guidance methods - Google Patents

Description

The present invention relates to a method of guiding an intersection existing on a guide path, and more particularly to a method of guiding an intersection according to the complexity of the intersection.

The navigation device searches for a route to the destination entered by the user, and based on the searched route, guides the direction of travel such as turning left or right at a branch road such as an intersection. In intersection guidance, when approaching a target intersection, an arrow indicating the direction of travel is superimposed on the road shape of the intersection to provide guidance. Further, the guidance of the guidance route is not limited to this, and there are various guidance modes, and an appropriate guidance mode for the user is provided.

Patent Document 1 relates to a navigation device for switching a guidance mode, and this navigation device returns to a guidance route or at an intersection when a guidance mode different from the initial guidance mode is set. The guidance mode is switched when approaching.

Japanese Unexamined Patent Publication No. 2002-005681

In recent navigation devices, in order to convey the intersection to be guided to the user in an easy-to-understand manner without gazing at the screen, the intersection guidance is expanded and the guidance direction is conceptualized to draw a large arrow. There is something to display as an arrow. In the big arrow display, the background road that imitates the intersection is displayed to make it easier to understand the road to be guided at the intersection. As shown in Fig. 9 (A), the drawing specifications of the background road that displays the big arrow are such that the intersection road is deformed at seven different angles (seven directions) based on the link that the vehicle M enters. Conceptualize). That is, the direction to be deformed is determined based on the direction of the escape link connected to the intersection.

FIG. 9B shows the guidance display 1 at the intersection C. On the guidance display 1, a road 2 in which the road at the intersection C is deformed and a big arrow 3 indicating the direction of travel are displayed there. When the intersection road is displayed in a complicated manner, the user gazes at the screen. To prevent this, the intersection road is defaulted and the big arrow is displayed.

However, although the above-mentioned intersection guidance is useful for simple intersections, it may be rather difficult to understand in the case of an intersection with a large number of crossroads or an intersection having a complicated shape. As a result, the driver may make a mistake on the road to follow at the intersection.

10 to 14 are examples of intersections where the big arrow display is not appropriate. An intersection having a complicated shape shown in FIG. 10 (A), FIG. 10 (B) is a schematic view of the intersection road of FIG. 10 (A), and FIG. 10 (C) is a display of a deformed intersection road. Since the shape of the deformed intersection road is different from that of the actual intersection road, it becomes difficult to understand the road due to the big arrow. For intersections with complicated shapes, road drawing as shown in FIG. 10B is desirable, but it is not realistic to prepare such road data at all intersections.

In FIG. 11A, the target intersection is a seven-way road in which the road into which the vehicle M enters and the roads A to F are connected, and the guide route is the road in the A direction. The road in the A direction is in the direction of an angle θ1 that returns slightly to the front with respect to the traveling direction of the own vehicle M, and the angle shown by the image of the big arrow prepared in advance does not match the actual approach / exit angle. There is. As shown in the guidance display 1 of FIG. 11B, the road A of the guidance route is displayed so as to turn at a substantially right angle to the left side, and the big arrow 3 may be displayed there. Therefore, it is originally necessary to bend at a steep angle such as θ1, but it is guided in the wrong direction.

As shown in FIG. 12 (A), when the intersection is such that the vehicle enters from the road 4 and exits through the curved road 5 to the road 6, the actual intersection is as shown in FIG. 12 (B). The big arrow should be displayed according to the shape of the road. However, since the road 6 is adjacent to the road 7, the road 6 and the road 7 are unified (included), and are displayed as one road on the guidance screen 1 of FIG. 12 (C), which is different from the actual road. May result in a different big arrow display. This is because the drawing specifications of the background road are deformed at a constant angle as shown in FIG. 9A, so that adjacent roads having similar angles are integrated into one road. Such a display behaves according to the specifications and is normal as a process, but the display is difficult for the user to understand.

As shown in FIG. 13A, when the own vehicle M traveling on the road 8 escapes from the intersection of the 6-way road in the G direction, the road in the K direction may not be displayed as a deformed road. This is because a plurality of roads are unified (included) as in the example shown in FIG. 13 (B) is the guidance screen of FIG. 13 (A), but the road in the K direction is not displayed. Therefore, when the big arrow 3 that turns left at a right angle is displayed, the road may be mistakenly entered in the direction H instead of the direction G.

At the intersection of 11 different roads as shown in FIG. 14A, a plurality of roads may be unified (included) as in the above problem. FIG. 14B is the guidance screen of FIG. 14A, and the roads in the L direction, the M direction, the N direction, the P direction, the S direction, and the T direction are not displayed due to deformation, and are originally in the O direction. There is a risk of entering the road in the M direction where you should go.

An object of the present invention is to solve such a conventional problem, and to provide an electronic device, an intersection guidance program, and an intersection guidance method capable of performing optimum intersection guidance according to the intersection complexity. ..

The electronic device according to the present invention includes a search means for searching a route to a destination, an intersection guidance means for guiding the traveling direction of an intersection existing on the searched route, and a determination means for determining the complexity of the intersection. Based on the determination result of the determination means, the intersection guidance means uses the first guidance means for displaying an arrow image on the abstracted intersection road or the intersection image represented three-dimensionally. Select the second guiding means to guide.

Preferably, the intersection guiding means selects the second guiding means when the determination means determines that the intersection is complicated, and selects the first guiding means when the intersection is determined not to be complicated. .. Preferably, the intersection guiding means further includes a third guiding means for guiding using an enlarged intersection image, and the intersection guiding means selects a third guiding means when it is determined that the intersection is complicated. .. Preferably, the intersection guiding means selects the second guiding means in preference to the third guiding means when it is determined that the intersection is complicated. Preferably, when the determination means has another intersection within a certain distance from the intersection, the determination means determines that the intersection is complicated. Preferably, the determination means determines that the intersection is complicated when the number of roads connected to the intersection is a certain value or more. Preferably, the determination means determines that the intersection is complicated when a plurality of roads are aggregated when the first guidance means is used. Preferably, the determination means determines that the intersection is complicated when the difference between the angle of the arrow image and the angle formed by the actual approach road and the escape road is a certain value or more when the first guide means is used. To do. Preferably, the determination means determines that the intersection is complex when it is roundabout.

The intersection guidance program according to the present invention is executed in an electronic device having a navigation function, and determines a step of searching for a route to a destination and a complexity of an intersection existing on the searched route. It has a step and a step for guiding the traveling direction of the intersection on the searched route, and the guiding step displays an arrow image on the abstracted intersection road based on the determination result of the determination step. The first guiding means for guiding or the second guiding means for guiding using the intersection image represented three-dimensionally is selected.

The intersection guidance method according to the present invention is in an electronic device having a navigation function, and includes a step of searching for a route to a destination, a step of determining the complexity of an intersection existing on the searched route, and a step of determining the complexity of the intersection existing on the searched route. The first step includes a step of guiding the traveling direction of an intersection on the searched route, and the guiding step displays an arrow image on an abstracted intersection road based on the determination result of the determination step. The guidance means of the above, or the second guidance means for guiding using the intersection image represented three-dimensionally is selected.

According to the present invention, a first guide for determining the complexity of an intersection and displaying an arrow image on the abstracted intersection image based on the determination result, or an intersection image represented three-dimensionally is used. Since the second guidance is selected, it is possible to provide the optimum intersection guidance for the driver according to the complexity of the intersection, and thereby it is possible to prevent erroneous recognition of the traveling direction.

It is a block diagram which shows the structure of the vehicle-mounted device which concerns on embodiment of this invention. It is a figure which shows the example of acquiring the information from another distribution site. It is a figure which illustrates the data stored in the storage part which concerns on embodiment of this invention. It is a figure exemplifying a roundabout. It is a figure which illustrates the intersection enlarged view and the real 3D map which is a kind of intersection guidance. It is a figure which illustrates the functional structure of the intersection guidance program which concerns on embodiment of this invention. It is a figure which illustrates other determination method of the complex intersection determination part which concerns on embodiment of this invention. It is a flow chart which shows the operation of the intersection guidance program which concerns on embodiment of this invention. It is a figure which illustrates the big arrow display in the conventional navigation device. It is a figure which illustrates the big arrow display in the conventional navigation device. It is a figure which illustrates the big arrow display in the conventional navigation device. It is a figure which illustrates the big arrow display in the conventional navigation device. It is a figure which illustrates the big arrow display in the conventional navigation device. It is a figure which illustrates the big arrow display in the conventional navigation device.

Next, an embodiment of the present invention will be described in detail with reference to the drawings. The electronic device according to the embodiment of the present invention is an in-vehicle device such as a navigation device fixedly mounted on a moving body such as an automobile, a portable computer device that can be carried around, or a tablet-type computer device. Can be done. The electronic device according to the embodiment of the present invention is equipped with a map display function, and can display roads, facilities, the position of the own vehicle, and the like. In addition, the map display function can scroll the map image as the position of the own vehicle changes, and the surrounding map can be changed at any time. Further, the electronic device according to the embodiment of the present invention has a navigation function, searches for a guidance route to a destination, and displays guidance and voice for intersections and right / left turn points existing on the guidance route. Guidance can be provided. The electronic device may further include, for example, a function of reproducing audio / video data, a function of receiving a television / radio broadcast, a function of executing application software, and the like in an integrated manner as other functions. Further, the electronic device of the present invention may be a device that stores road map data for executing a navigation function by itself in a storage device, a distribution site on the Internet via a data communication means such as radio, or a distribution site on the Internet. It may be the one that acquires the necessary road map data from a distribution server or the like.

FIG. 1 is a block diagram showing a configuration of an in-vehicle device according to an embodiment of the present invention. The in-vehicle device 10 includes an input unit 100, a position information calculation unit 110, a navigation unit 120, a display unit 130, a voice output unit 140, a communication unit 150, a storage unit 160, and a control unit 170. The configuration shown here is an example, and the in-vehicle device 10 may include a configuration other than the above.

The input unit 100 receives an instruction from the user by an input key device, a voice input recognition device, a touch panel, or the like, and provides the instruction to the control unit 170. The position information calculation unit 110 calculates the current location of the own vehicle based on the GPS signal transmitted from the GPS satellite and the output from the relative orientation sensor such as the gyro sensor.

The navigation unit 120 searches for a route from the current location to the destination calculated by the position information calculation unit 110, outputs the voice guidance of the searched route from the voice output unit 140, and displays the intersection guidance on the route in the display unit 130. To display. The destination of the route search is input by the user from the input unit 100, for example. When the vehicle reaches Xm in front of the intersection to be guided, the navigation unit 120 of the present embodiment provides intersection guidance regarding the traveling direction of the intersection. As described in FIG. 9, the basic operation of the intersection guidance is to display a big arrow on the deformed background road. However, as will be described later, for intersections where the big arrow display is inappropriate, other intersection guidance is provided.

The display unit 130 includes a display device such as a liquid crystal display or an organic EL, and for example, displays a map image or a guidance image generated by the navigation unit 120, or displays a setting screen or a menu screen for user setting. Or something. The display unit 130 may be provided with a touch panel function. The voice output unit 140 outputs voice guidance for guiding the route calculated by the navigation unit 120, and provides voice guidance for driving support information to the driver.

The communication unit 150 enables data to be sent and received to and from various external devices. For example, as shown in FIG. 2, the communication unit 150 accesses the location information distribution site 152 via the network NW, acquires the vehicle position information from the location information distribution site 152, or accesses the map data distribution site 154, and there. You can get the necessary map data from, or you can access the road traffic information distribution site 156 and get detailed information about the road traffic information from there. The own vehicle position information obtained from the position information distribution site 152 can be used instead of the own vehicle position information calculated by the position information calculation unit 110.

The storage unit 160 can store application software and programs executed by the control unit 170, map data required by the navigation unit 120, and the like. The map data can include node data related to intersections and branches, link data related to roads between nodes, and other map information required for the navigation unit 120. FIG. 3A is an example of map data 161. The map data 161 includes link data 162, node data 163, and facility data 164. The link data 162 includes a unique link ID for identifying the link, the latitude and longitude (nodes) of the start and end points of the link, the type of road (national road, general road, prefectural road, expressway, toll road, etc.), and the running of the road. It contains data such as direction (eg, left or right), width, regulation (eg, one-way), number of lanes. The node data 163 includes data such as a node ID that identifies the node, an intersection flag that indicates whether or not the node is an intersection, and a connection relationship between an entry link connected to the node and an escape link that escapes from the node. Further, in this embodiment, when the node is an intersection, data indicating the complexity of the intersection is also stored. The data indicating the complexity of the intersection includes, but is not limited to, the nearest intersection presence / absence data 165, the intersection connection road number data 166, the aggregated notation presence / absence data 167 of multiple roads, the round about presence / absence data 168, and the like. Parameters can also be included in the data indicating the complexity of the intersection.

The closest intersection presence / absence data 165 indicates whether or not another intersection exists within a certain distance near the intersection. If another intersection exists within a certain distance centered on the two-dimensional coordinates of the node data 163 related to the closest intersection presence / absence data 165, “1” exists in the closest intersection presence / absence data 165, and another intersection exists. Otherwise, "0" is stored. In this case, the nearest intersection presence / absence data is 1-bit data. Preferably, the nearest intersection presence / absence data 165 is prepared in advance as map data 161.

The intersection connecting road number data 166 indicates the number of roads connected to the intersection. For example, in the case of a five-forked road where five roads are connected to an intersection, data representing "5" is stored, and in the case of a seven-forked road where seven roads are connected, data representing "7" is stored. Stored. In this case, the intersection connection road number data is multi-bit data. Preferably, the intersection connection road number data 166 is prepared in advance as map data 161.

As shown in FIGS. 12, 13, and 14, the aggregated road presence / absence data 167 indicates whether or not a plurality of roads are aggregated into one road when the intersection road is deformed. When displaying the big arrow, the intersection road is deformed according to the specifications shown in FIG. 9A, but a plurality of roads existing within a certain angle range are deformed into one road. At an intersection where such road aggregation occurs, "1" is stored as 1-bit data in the aggregated road presence / absence data 167, and "0" is stored at an intersection where aggregation does not occur. Preferably, the aggregated road presence / absence data 167 is prepared in advance as map data 161.

The roundabout presence / absence data 168 indicates whether or not the intersection is a roundabout. FIG. 4 is an example of a roundabout intersection. As shown in the figure, the roundabout intersection R is an intersection in which a plurality of roads 182 are radially connected to the circular road 180. At the roundabout intersection, there are usually no traffic lights or the like, and the circular road 180 is a one-way street. If the intersection is a roundabout, "1" is stored as 1-bit data, and if it is not a roundabout, data "0" is stored. Preferably, the roundabout presence / absence data 168 is prepared in advance as map data 161.

In the node data 163, in addition to the data indicating the complexity of the intersection, the connection link ID indicating the link connecting to the intersection is associated and stored. For example, in the case of a five-forked road intersection, five connection links ID1, ID2, ID3, ID4, and ID5 are associated and stored. Further, the connection link ID can include orientation data as attribute data. The directional data represents, for example, an angle with respect to the north, or all directions are divided into eight directions (north, northwest, west, southwest, south, southeast, east, northeast), and one of the directions. Can represent.

Further, the storage unit 160 can store various images necessary for performing intersection guidance. For example, a deformed background road image as shown in FIG. 9B and an arrow image (big arrow image) drawn on the background road image, which are used when displaying the big arrow, are stored. Further, an intersection guidance image other than the intersection guidance by the big arrow can be stored.

FIG. 5 is an example of an enlarged intersection map and a real 3D map, which are a kind of intersection guidance. The storage unit 160 can store an enlarged intersection image as shown in FIG. 5A and a real 3D image of the intersection as shown in FIG. 5B in association with the node data 163. The intersection enlarged view 132 is an enlarged view of the intersection of the two-dimensional road map display 134 on the left side, that is, an enlarged view of the intersection P1. The intersection enlarged view 132 shows an actual intersection road without deforming the intersection road. The real 3D map 136 displays the two-dimensional road map display 134 on the left side in three dimensions, and displays an image of an actual intersection and its road in three dimensions, or an actual intersection and its road in three dimensions using polygon data. It is a representation. In FIG. 5B, the real 3D map 136 of the intersection P2 is displayed on the right side. It is not always necessary that the enlarged intersection map and the real 3D map are prepared for all the intersections.

In a preferred embodiment, the control unit 170 is composed of a microcontroller including a ROM, a RAM, and the like, and the ROM or the RAM can execute various programs for controlling the operation of each unit of the in-vehicle device 10. In this embodiment, the intersection guidance program 200 that changes the guidance mode according to the complexity of the intersection is executed for the guidance of the intersection existing on the guidance route to the destination. In a preferred embodiment, the intersection guidance program is executed when the navigation unit 120 is operated.

FIG. 6 is a diagram illustrating a functional configuration of the intersection guidance program according to the present embodiment. The intersection guidance program 200 includes a route search unit 210, an intersection extraction unit 220, an intersection complexity determination unit 230, a guidance method determination unit 240, a guidance intersection detection unit 250, and an intersection guidance unit 260.

When the navigation 120 is operated, the route search unit 210 searches for a route from the current location to the user-input destination, for example. The intersection extraction unit 220 extracts the intersection included in the route searched by the route search unit 210. Specifically, the node data 163 existing on the search path is referred to, and the intersection in which the intersection node flag is turned on is extracted.

The intersection complexity determination unit 230 determines the complexity of the intersection extracted by the intersection extraction unit 220. As the first determination method, the intersection complexity determination unit 230 refers to the extracted intersection node data 163, and is related to the node data 163, the nearest intersection presence / absence data 165, the intersection connection road number data 166, and the aggregated road. The complexity of the intersection is determined based on the presence / absence data 167 and the round-about presence / absence data 168. In a preferred example, when any of the nearest intersection presence / absence data 165, the aggregated road presence / absence data 167, and the roundabout presence / absence data 168 is "1", that is, when any one of the road environments is "yes". The intersection complexity determination unit 230 determines that the intersection is complex. Further, preferably, when the intersection connection road number data 166 indicates that, for example, six or more roads are connected to the intersection (six-forked road or more), it is determined that the intersection is complicated. .. The threshold value for the number of connecting roads for determining that the intersection is complicated can be arbitrarily set.

Next, a second determination method by the intersection complexity determination unit 230 will be described. FIG. 7 is a diagram illustrating another determination method of the intersection complexity determination unit 230. For example, at the intersection P3 shown in FIG. 7 (A), when the route searched by the route search unit 210 enters from the road 8 and escapes from the road 9, it is as shown in FIG. 7 (B) as an intersection guide. The big arrow shall be displayed. Here, the angle θ2 at which the road 8 and the road 9 intersect can be obtained from the directional data of the connection link IDs of the road 8 and the road 9 as shown in FIG. On the other hand, the arrow image used for displaying the big arrow is superimposed on the deformed intersection road, and therefore has an angle equal to the angle θ3 of the deformed intersection road. The intersection complexity determination unit 230 compares the angle θ2 formed by the actual road 8 and the road 9 with the angle θ3 of the arrow image of the big arrow, and when the difference is a certain value or more, for example, 18 degrees or more, the intersection P3 is determined to be complex. The intersection complexity determination unit 230 may use either one of the first determination method and the second determination method, or may perform the two determination methods in combination.

The guidance method determination unit 240 determines the intersection guidance method based on the determination result of the intersection complexity determination unit 230. Specifically, when the intersection complexity determination unit 230 determines that the intersection is not complicated, the guidance method determination unit 240 selects the intersection guidance by the big arrow display as shown in FIG. 9B. When it is determined that the intersection is complicated, the guidance by the real 3D map or the guidance by the enlarged intersection map is selected as the intersection guidance other than the big arrow display. In a preferred embodiment, the guidance method determination unit 240 gives priority to the guidance method by the real 3D map for the intersection determined to be complicated, and when the guidance of the real 3D map cannot be performed, that is, an image of the real 3D map is prepared. If not, decide on the guidance method using an enlarged view of the intersection.

The guidance intersection detection unit 250 monitors the vehicle position calculated by the position information calculation unit 110, and detects whether or not the vehicle position has reached a certain distance before the intersection to be guided. When the guidance intersection detection unit 250 detects the approach of the intersection to be guided, the intersection guidance unit 260 provides intersection guidance based on the guidance method determined by the guidance method determination unit 240. As described above, the intersection guide unit 260 provides guidance (FIGS. 5 (A) and (B)) using a real 3D map or an enlarged intersection map for a complicated intersection, and if it is not a complicated intersection, a big arrow. (See Fig. 9 (B)). Further, the intersection guidance unit 260 can perform voice guidance from the voice output unit 140 as well as guidance to the display unit 130.

Next, the operation of the navigation unit of this embodiment will be described. FIG. 8 is a flow for explaining the operation of the navigation unit according to the present embodiment. First, when the destination is set, the route search unit 210 searches for a route from the current location to the destination (S100), and the intersection extraction unit 220 searches for one or two or more guide targets on the searched route. The intersection of (S102) is extracted. Next, the intersection complexity determination unit 230 determines the complexity of the intersection to be guided (S104), and when it is determined that the intersection is not complicated, the guidance method determination unit 240 provides intersection guidance by the big arrow. Determine (S106).

On the other hand, when it is determined that the intersection is complicated, the guidance method determining unit 240 determines whether or not a real 3D map of the intersection exists (S108), and if a real 3D map exists, , The guidance method determination unit 240 determines the intersection guidance by the real 3D map (S110). Well, if the real 3D map does not exist, it is decided to guide by the enlarged view of the intersection (S112). The processing of S104 to S112 is performed for all the extracted intersections (S114).

Next, when the guidance methods for all the intersections are determined, the guidance intersection detection unit 250 detects the approach of the intersection to be guided based on the position of the own vehicle (S116). When the approach of the intersection to be guided is detected, the intersection guidance unit 260 guides the intersection according to the determined guidance method (S118). The intersection guidance is continued until the destination is reached (S120).

As described above, according to this embodiment, the optimum intersection guidance for the driver is automatically selected according to the complexity of the intersection, so that the number of intersections having complicated shapes or connecting roads is large. At intersections, it provides more realistic intersection guidance and prevents the driver from making a mistake in the direction of travel. In addition, since the big arrow is displayed on the deformed intersection road except for complicated intersections, it is possible to present guidance that is easy for the driver to understand.

In the above flow, an example of first determining the intersection guidance method for all intersections is shown, but the present invention is not limited to this, and the guidance method for the intersections to be guided, which are sequentially generated as the vehicle progresses, is determined each time. You may do so.

Next, a modified example of this embodiment will be described. In the above embodiment, the complexity is determined based on the closest intersection presence / absence data 165, the aggregated road presence / absence data 167, and the roundabout presence / absence data 168, or as shown in FIG. 7, the actual road angle θ2 and the big arrow The complexity was determined based on the difference from the angle θ3 of the arrow image, but in the modified example, the determination of the complexity is quantified and the degree of complexity is determined.

For example, if there is a closest intersection, 2 points, if there is a roundabout intersection, 4 points, if there is an intensive road, 10 points, etc. Whether or not the intersection is complicated is determined by whether or not it is. By allowing the user to arbitrarily change the threshold value, it is possible to determine the intersection complexity that meets his / her own criteria.

Further, the intersection guidance may be determined according to the total number of points obtained by the determination of the intersection complexity. For example, if the total score is equal to or more than the first threshold value, the guidance is based on the real 3D map. , It is also possible to guide by big arrow. However, even with this determination method, for intersections for which a real 3D map does not exist, the guidance method is determined by the enlarged intersection map.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and modifications are made within the scope of the gist of the invention described in the claims. It can be changed.

10: In-vehicle device 100: Input unit 110: Position information calculation unit 120: Navigation unit 130: Display unit 140: Audio output unit 150: Communication unit 160: Storage unit 161: Map data 162: Link data 163: Node data M: Auto car

Claims (10)

A search method for searching the route to the destination,
Intersection guidance means that guides the direction of travel of intersections existing on the searched route, and
It has a determination means for determining the complexity of an intersection, and has
Based on the determination result of the determination means, the intersection guidance means guides using a first guidance means for displaying an arrow image on an abstracted intersection road or a second intersection image represented three-dimensionally. Select a guidance method and
The first guiding means abstracts the intersection road at a predetermined angle, displays an arrow image showing the direction of travel so as to overlap the abstracted intersection road, and displays an arrow image.
The determination means compares the angle of the arrow image when the first guide means is used with the angle at which the link entering the intersection and the link exiting the intersection intersect, and the angle of the arrow image is determined. An electronic device that determines that an intersection is complex if it is greater than the angle of intersection. The intersection guiding means selects a second guiding means when the determination means determines that the intersection is complicated, and selects a first guiding means when it is determined that the intersection is not complicated. Item 1. The electronic device according to item 1. The intersection guiding means further includes a third guiding means for guiding using an enlarged intersection image.
The electronic device according to claim 1 or 2, wherein the intersection guiding means selects a third guiding means when it is determined that the intersection is complicated. When it is determined that the intersection is complicated, the intersection guidance means gives priority to the second guidance means and the second guidance means when the guidance of the second guidance means and the third guidance means is possible. The electronic device according to claim 3, wherein the means is selected, and when the guidance by the second guidance means cannot be performed, the third guidance means is selected.
Any one of claims 1 to 4, wherein the determination means determines that the intersection is complicated when the angle of the arrow image is larger than the angle of the intersection and there is another intersection within a certain distance from the intersection. The electronic device according to one. The determination means determines that the intersection is complicated when the angle of the arrow image is larger than the angle of the intersection and the number of roads connected to the intersection is a certain value or more. 5 The electronic device according to any one. The determination means determines that the intersection is complicated when the angle of the arrow image is larger than the angle of the intersection and a plurality of roads are aggregated when the first guide means is used. The electronic device according to any one of claims 1 to 6. The determination means according to any one of claims 1 to 7 , wherein when the angle of the arrow image is larger than the angle of the intersection and the intersection is a roundabout, the determination means determines that the intersection is complicated. Electronic device. An intersection guidance program executed in an electronic device having a navigation function.
Steps to find a route to your destination,
Steps to determine the complexity of intersections on the searched route, and
It has a step to guide the direction of travel of the intersection on the searched route.
The guiding step is guided by using the first guiding means for displaying an arrow image on the abstracted intersection road or the three-dimensionally represented intersection image based on the determination result of the determination step. Select the guidance method of 2 and
The first guiding means abstracts the intersection road at a predetermined angle, displays an arrow image showing the direction of travel so as to overlap the abstracted intersection road, and displays an arrow image.
In the determination step, the angle of the arrow image when the first guiding means is used is compared with the angle at which the link entering the intersection and the link exiting the intersection intersect, and the angle of the arrow image is compared. An intersection guidance program that determines that an intersection is complex when is greater than the intersection angle. This is an intersection guidance method for electronic devices that have a navigation function.
Steps to find a route to your destination,
Steps to determine the complexity of intersections on the searched route, and
It has a step to guide the direction of travel of the intersection on the searched route.
The guiding step is guided by using the first guiding means for displaying an arrow image on the abstracted intersection road or the three-dimensionally represented intersection image based on the determination result of the determination step. Select the guidance method of 2 and
The first guiding means abstracts the intersection road at a predetermined angle, displays an arrow image showing the direction of travel so as to overlap the abstracted intersection road, and displays an arrow image.
In the determination step, the angle of the arrow image when the first guiding means is used is compared with the angle at which the link entering the intersection and the link exiting the intersection intersect, and the angle of the arrow image is compared. An intersection guidance method for determining that an intersection is complicated when is larger than the intersection angle.

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