JP2002350169A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a navigation system which can select a running route by taking into consideration the degree of a change in an altitude. SOLUTION: When a plurality of running routes are searched by a route- search processing part 22, a map plotting part 14 generates map plotting data used to display a plane map image in a range including the respective running routes so as to be stored in a VRAM 16. A search-result plotting part 26 generates the search result of the plurality of running routes on the map image so as to be stored in the VRAM 16. A cross-section plotting part 30 generates plotting data used to display a cross section regarding the plurality of running routes. An image composition part 34 performs a processing operation in which the plane map image including the search result is displayed on the upper side on the screen of a display device 6, and in which the cross-section image of the plurality of running routes is displayed on the lower side on the screen of the display device 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device having a route search function for searching for a traveling route connecting a predetermined departure point and a destination.

[0002]

2. Description of the Related Art In general, an on-vehicle navigation device includes:
A map display function that displays a map, such as around the vehicle position, on the screen, a route search function that searches for a route to a destination or a stopover specified by the user, and a vehicle that follows the route set by the route search It is equipped with a route guidance function for guiding travel.

In many navigation systems, a plurality of travel routes are extracted based on a plurality of search conditions, such as toll road priority, time priority, and standard, during route search processing. Then, the plurality of extracted traveling routes are displayed on the screen in a display color different from other roads on the map, and, for example, one traveling route in a temporarily selected state is highlighted and displayed. You. Then, when any one of the traveling routes is selected by the user, a route guidance process is performed along the traveling route.

[0004]

By the way, in the conventional navigation device, after a plurality of travel routes are obtained by the route search process, each travel route is used as a reference when selecting one travel route. Although additional information such as the total distance and the estimated travel time is presented, information about the altitude of each travel route is not presented.

[0005] For this reason, for example, "the driver is a novice, so a driving route with a small change in altitude is selected," such as "the driver's driving technique, vehicle performance, fuel efficiency, etc." The problem is that it is not possible to select an appropriate travel route considering the degree of change in
When the user actually travels on the selected traveling route, there are inconveniences such as the fact that the altitude changes greatly and the traveling route is difficult to travel even if the distance is shortest.

[0006] The present invention has been made in view of the above points, and an object of the present invention is to provide a navigation device which can select a traveling route in consideration of the degree of altitude change. .

[0007]

In order to solve the above-mentioned problems, in the navigation device according to the present invention, a plurality of traveling routes connecting the departure place and the destination are searched for by the route search means. The first drawing means draws a planar map image including a plurality of travel routes, and a cross-sectional image of each of the plurality of searched travel routes is displayed in a second map image.
, And the planar map image drawn by the first drawing means and the sectional view image drawn by the second drawing means are displayed on the screen by the display means. When a plurality of travel routes are searched, the respective sectional view images of each travel route are displayed, so that a desired travel route can be selected in consideration of a change in altitude of each travel route.

It is desirable that the above-mentioned display means displays a plane map image and a sectional view image side by side on the same screen. Thereby, while comprehending information accompanying each traveling route (for example, which city each traveling route passes) based on the planar map image, grasping the change in altitude based on the sectional view image, Therefore, it is possible to make a comprehensive judgment based on the above information, so that a suitable traveling route can be easily selected.

The above-mentioned display means may display the cross-sectional view image in a partial area of the planar map image on the same screen. By displaying the cross-sectional view image transparently, the plane map image can also be displayed along with the area, so that the amount of map information can be increased.

[0010] The first drawing means sets a part of the map information in a non-display state for a partial area of the planar map image on which the cross-sectional image overlaps when the display means displays the cross-sectional image transparently. It is desirable to do. By making some map information (for example, character information such as a place name or a facility mark indicating the location of various facilities) in a partial area where the sectional view images overlap, the sectional view image is easy to read. Can be improved.

An operating means for instructing switching of the display screen is further provided, and when the switching instruction is given by using the operating means, the display means displays the screen of the plane map image and the screen of the sectional view image. The display may be switched. When the screen display is switched, each image (planar map image, cross-sectional image) can be displayed using a large display area.

It is desirable that a plurality of travel routes included in the plan map image and the cross-sectional view image are drawn so as to be distinguishable from each other, and are drawn in a state where the same travel route is associated with each other. For example, by setting different display colors for each of a plurality of travel routes, each travel route can be identified, and the same travel route is associated with the same display color in the planar map image and the cross-sectional view image by performing the correspondence. By doing so, the correspondence between the traveling route shown in the planar map image and the traveling route shown in the cross-sectional image can be easily grasped visually, and the selection of the traveling route is further facilitated.

It is preferable that the above-mentioned second drawing means performs drawing corresponding to each of a plurality of travel routes by making one axis correspond to altitude and the other axis to travel distance. For example, the vertical axis of the graph corresponds to the altitude, and the horizontal axis corresponds to the traveling distance, and by drawing a plurality of traveling paths, it becomes easy to grasp changes in the total traveling distance and the altitude of each traveling path, and for each traveling path. The situation (for example, “the total mileage is short but the altitude change is large” or “the total mileage is long but the road is flat”) can be easily compared.

It is desirable that the second drawing means described above draws a cross-sectional image including a plurality of traveling routes and additional information relating to the altitude of each traveling route. Specifically, the additional information on the altitude includes, for example, the inclination angle information of the steepest part of each traveling route, the height information of the highest altitude part of each traveling route, or the respective traveling route. It is desirable to use the scale information indicating the altitude of. By including various kinds of additional information relating to the altitude as described above in the cross-sectional view image, the situation of each traveling route can be grasped in more detail.

Further, selecting means for performing an operation of selecting any one of the plurality of traveling routes searched by the route searching means, and selecting one of the traveling routes selected by the selecting operation using the selecting means. And a third drawing means for drawing a peripheral map image for displaying map information around the vehicle at a predetermined display magnification along the route, wherein when one of the traveling routes is selected by the selection means, the display means is provided. Accordingly, it is desirable to display the peripheral map image and the sectional view image on the same screen. By displaying the cross-sectional view image in the same screen as the surrounding map image, when the vehicle travels along one travel route, it is possible to drive while grasping a change in altitude of the travel route.

It is desirable that the second drawing means draws a predetermined vehicle mark at a position along the traveling route selected by the selection means and corresponding to the actual vehicle position. By drawing the vehicle mark on the cross-sectional image corresponding to the actual vehicle position, it becomes easier to grasp the altitude change of the traveling route.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A navigation device according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a detailed configuration of the navigation device. The navigation device shown in FIG. 1 includes a navigation controller 1, a DVD 2, a disk reader 3, a remote control (remote control) unit 4, a vehicle position detector 5, and a display device 6.

The navigation controller 1 controls the entire operation of the navigation device. The navigation controller 1 includes a CPU, ROM, RA
The function is realized by executing a predetermined operation program using M or the like. The detailed configuration of the navigation controller 1 will be described later.

The DVD 2 is an information storage medium storing map data necessary for map display, route search, and the like.
Specifically, the map data stored on DVD2 includes:
(1) "Drawing unit" composed of various data necessary for displaying a map image; (2) "Road unit" composed of various data required for processing such as map matching, route search, and route guidance; and (3) intersection. An "intersection unit" including various data representing detailed information is included.

In the map data, road data is expressed using nodes corresponding to intersections and the like and links connecting these nodes, and various attributes relating to each road and intersections correspond to these nodes and links. Recorded. For example, in the present embodiment, data on the altitude of each point represented by these nodes is recorded in association with each node. Therefore, when the route search process is performed and the traveling route is extracted as a set of nodes, the altitude of each point is read out based on each node constituting the traveling route, so that the change in altitude over the entire traveling route is obtained. Can be displayed.

The disk reader 3 can load one or a plurality of DVDs 2 and reads map data from any one of the DVDs 2 under the control of the navigation controller 1. The loaded disk is not necessarily a DVD, but may be a CD. Also, D
Both VD and CD may be selectively loadable.

The remote control unit 4 is provided with various operation keys such as a joystick for specifying up, down, left, and right directions, a numeric keypad, and a decision key for fixing various settings.
Signals corresponding to the operation contents are sent to the navigation controller 1
Output to The vehicle position detection unit 5 includes, for example, a GPS receiver, a direction sensor, a distance sensor, and the like, detects a vehicle position (longitude, latitude) at a predetermined timing, and outputs a detection result.

The display device 6 displays various images such as a map image around the position of the own vehicle and a sectional view image of the traveling route based on the drawing data output from the navigation controller 1. Next, a detailed configuration of the navigation controller 1 will be described. The navigation controller 1 shown in FIG. 1 includes a map buffer 10, a map reading control unit 12, a map drawing unit 14, a VRAM 16, a vehicle position calculation unit 20, a route search processing unit 22, a route memory 24, a search result drawing unit 26, and route guidance. It is configured to include a processing unit 28, a sectional view drawing unit 30, an input processing unit 32, and an image synthesis unit 34.

The map buffer 10 includes the disk reader 3
, The map data read from the DVD 2 is temporarily stored. The map readout control unit 12 includes a vehicle position calculation unit 2
In response to the position of the vehicle calculated based on 0, a request from the input processing unit 32, and the like, a read request for map data in a predetermined range is output to the disk reading device 3.

The map drawing section 14 generates map drawing data for displaying a map image based on the map data stored in the map buffer 10. The VRAM 16 temporarily stores map drawing data output from the map drawing unit 14.

The vehicle position calculation unit 20 includes a vehicle position detection unit 5
The vehicle position and the vehicle direction are calculated based on the detection data output from the CPU, and if the calculated vehicle position is not on the road in the map data, a map matching process for correcting the vehicle position is performed. The route search processing unit 22 searches for a plurality of traveling routes that connect a departure point and a destination (or a waypoint) specified by a user under predetermined conditions. For example, a plurality of travel routes that minimize the cost under various conditions such as the shortest distance and the shortest time are searched.

The route memory 24 stores travel route data indicating the contents of the travel route extracted by the route search processor 22. As described above, the travel route is represented as a set of nodes, and data specifying these nodes is stored in the route memory 24 as travel route data.

The search result drawing unit 26 includes the route search processing unit 2
2 to generate drawing data for displaying a plurality of traveling routes superimposed on a map, and store the generated drawing data in the VRAM 16. The search result drawing unit 26 of the present embodiment generates drawing data by setting different display colors for each of the plurality of traveling routes so that the plurality of traveling routes can be identified from each other.

Further, in response to the selection operation performed by using the remote control unit 4, the search result drawing section 26 sets any one of the traveling routes to a selected state, and highlights this traveling route (for example, other processes). (Eg, setting a display color that is more conspicuous than the traveling route of the vehicle).

The route guidance processing section 28 reads the route data corresponding to one travel route selected by the user from the route memory 24, and displays the travel route (guide route) to be guided over the map. Route guidance processing such as generation of drawing data for performing

The cross section drawing unit 30 includes a route search processing unit 22
The drawing data for displaying the sectional view images of each of the plurality of travel routes searched for is generated. Specifically, the sectional view drawing unit 30 reads nodes corresponding to each of the plurality of traveling routes from the route memory 24, and reads altitudes of points corresponding to these nodes from the map data stored in the map buffer 10. Thereby, a cross-sectional view image of each traveling route is drawn. A specific display example of the cross-sectional view image will be described later.

The input processing section 32 outputs a command for performing an operation corresponding to various operation instructions input from the remote control unit 4 to each section in the navigation controller 1. The image combining unit 34 combines the drawing data read from the VRAM 16 and the drawing data output from the cross-sectional drawing unit 30 to perform image combining, and outputs the combined drawing data to the display device 6.

The above-described route search processing unit 22 serves as a route search unit, the map drawing unit 14 and the search result drawing unit 26 serve as a first drawing unit, the cross section drawing unit 30 serves as a second drawing unit, and the display device 6. , VRAM 16 and image synthesizing section 34 correspond to display means, remote control unit 4 corresponds to operation means and selection means, and map drawing section 14 corresponds to third drawing means.

The navigation device according to the present embodiment has such a configuration, and its operation will be described next. FIG. 2 is a flowchart showing an operation procedure of the navigation device when displaying a cross-sectional view image of a plurality of traveling routes obtained by the route search and selecting one traveling route to be guided.

The route search processing section 22 determines whether or not an instruction to execute a route search has been issued (step 10).
0). While no instruction is given, a negative determination is made and the determination of step 100 is repeated. When execution of the route search is instructed, an affirmative determination is made in step 100, and the route search processing unit 22 searches for a plurality of traveling routes connecting the designated departure place and destination under various conditions (step 10).
1).

When a plurality of traveling routes are searched, the map drawing section 14 generates map drawing data for displaying a planar map image in a range including each traveling route, and stores the map drawing data in the VRAM 16 (step 102). The search result drawing unit 26
Generates drawing data for displaying search results of a plurality of traveling routes on a map image, and stores the drawing data in the VRAM 16 (step 103). As described above, in the present embodiment,
Different display colors are set for the respective traveling routes so that the plurality of traveling routes can be distinguished from each other.

The cross section drawing unit 30 reads nodes corresponding to each of the plurality of travel routes from the route memory 24, and reads out altitudes of points corresponding to these nodes from the map buffer 10, thereby obtaining each travel route. Is extracted (step 104). Next, the sectional view drawing unit 30
Generates drawing data for displaying a sectional view image of each travel route based on the extraction result of the altitude of each travel route (step 105).

Next, based on the drawing data stored in the VRAM 16, the image synthesizing section 34 displays a planar map image including a plurality of traveling route search results at a predetermined position on the upper screen of the display device 6 (see FIG. Step 10
6) Based on the drawing data output from the cross-sectional drawing unit 30, a cross-sectional image of each traveling route is displayed on the display device 6.
Is displayed at a predetermined position on the lower side of the screen (step 107).

Next, the route search processing section 22 determines whether or not one traveling route has been selected by the user using the remote control unit 4 (step 108). While one travel route is not selected, a negative determination is made, and the determination of step 108 is repeated. When one travel route is selected, an affirmative determination is made in step 108 and the route search processing unit 22
Sets the selected traveling route as a route guidance target (step 109). Specifically, the route search processing unit 2
2 instructs the route memory 24 to leave the route data of the travel route selected by the user and discard the route data of the other travel routes.

FIG. 3 is a diagram showing a display example of a plane map image and a sectional view image. As shown in FIG. 3, three traveling routes R connecting the current location (departure location) and the destination are displayed on the upper side of the screen.
A planar map image of a range including 1, R2, and R3 is displayed. In FIG. 3, the traveling route R1 is indicated by a dotted line, the traveling route R2 is indicated by a solid line, and the traveling route R3 is indicated by a dashed line so that the three traveling routes can be identified. This expresses that the display colors are different. Further, it is assumed that the traveling route R2 indicated by the solid line is in a selected state and a predetermined highlight is displayed.

Further, on the lower side of the screen, sectional views of a plurality of traveling routes are shown, with the vertical axis corresponding to the altitude and the horizontal axis corresponding to the traveling distance. In this cross-sectional view, a traveling route R1 'shown by a dotted line corresponds to the traveling route R1 shown on the planar map image on the upper side of the screen, and by using the same line type, the two can be associated with each other. Is being done. Similarly, a traveling route R2 'indicated by a solid line in the cross-sectional view corresponds to a traveling route R2 on the planar map image, and a traveling route R3' indicated by a dashed line corresponds to the traveling route R on the planar map image.
3 '.

In the sectional view shown in FIG. 3, since the horizontal axis corresponds to the traveling distance, the difference in the total traveling distance of each traveling route can be understood at a glance. Therefore,
(1) The running route R1 'has the shortest total running distance and the change in altitude is small. (2) The running route R2' has the longest total running distance and the change in altitude is not so large. (3) The running route R3 'has the second shortest total mileage and a large change in altitude, and so on
A desired traveling route can be selected by comprehensively determining the degree of altitude change and the total traveling distance.

In FIG. 3, the vertical axis corresponding to the altitude is marked with scales (scale information) at predetermined intervals of 0, 100,..., 500, so that the altitude of each traveling route is schematically shown. Numerical values are available. Note that the unit of the vertical axis is set to “meters”, and it is assumed that the user is notified in advance.

Next, a description will be given of an operation of displaying a sectional view image of a guidance route in parallel when performing route guidance processing along one traveling route (guide route) selected by the user. FIG. 4 is a flowchart showing an operation procedure of the navigation device when displaying a sectional view image of the guidance route in parallel with the route guidance processing. The following description will be made on the assumption that a map image is displayed at a predetermined position on the upper side of the screen and a cross-sectional view image is displayed at a predetermined position on the lower side of the screen.

The map drawing section 14 generates map drawing data for displaying a map image corresponding to a predetermined range around the vehicle position, and stores the map drawing data in the VRAM 16 (step 20).
0). Further, the route guidance processing unit 28 generates drawing data for displaying the guidance route on the map image based on the route data stored in the route memory 24, and generates the VRAM.
16 (step 201).

Further, the sectional view drawing section 30 reads the nodes corresponding to the guidance route from the route memory 24 and extracts the elevations of the guidance route by reading the altitudes of the points corresponding to these nodes from the map buffer 10 ( Step 2
02). Based on the result of extracting the altitude of the guide route, drawing data for displaying a sectional view of the guide route is generated (step 203).

The sectional view drawing section 30 executes step 203
In parallel with the processing shown in (1), the current vehicle position is acquired from the vehicle position calculation unit 20, and drawing data for displaying a predetermined vehicle mark on the cross-sectional view of the guidance route is generated in correspondence with the vehicle position. (Step 204).

Next, based on the drawing data stored in the VRAM 16, the image synthesizing section 34 displays a map image corresponding to the vicinity of the vehicle position at a predetermined position on the upper screen of the display device 6 (step 205). Based on the drawing data output from the cross-sectional drawing unit 30, a cross-sectional image of the guidance route is displayed at a predetermined position on the lower side of the screen of the display device 6 (step 206).

Thereafter, the route guidance processing section 28 determines whether or not the vehicle has reached the destination (step 207).
If the vehicle has not reached the destination, a negative determination is made in step 207, the process returns to step 200, and the subsequent processing is continued. If the vehicle has reached the destination, an affirmative determination is made in step 207, and the series of processes ends.

FIG. 5 is a diagram showing a display example of a map image and a sectional view image of a traveling route during route guidance. FIG.
As shown in the figure, a map image of a predetermined display magnification corresponding to the vicinity of the vehicle position is displayed on the upper side of the screen. The display magnification of the map image can be arbitrarily changed using operation keys provided on the remote control unit 4. On the map image, the road indicated by hatching corresponds to the guidance route. In the lower part of the screen, a sectional view of the guidance route is displayed with the vertical axis corresponding to the altitude and the horizontal axis corresponding to the traveling distance, and a predetermined position corresponding to the current vehicle position is displayed on the sectional view. Is shown. The display position of the vehicle mark G is updated at a predetermined timing as the vehicle travels.

As described above, when a plurality of travel routes are searched, the navigation device of the present embodiment vertically displays a plane map image of a range including each travel route and a cross-sectional image of each travel route. Since they are displayed side by side, it is easy to compare information including the total distance and altitude of each traveling route. Accordingly, the user can select a traveling route in consideration of the degree of altitude change of the plurality of searched traveling routes.

When a route is guided along the traveling route selected in this way, a map image around the vehicle position and a cross-sectional view image of the traveling route are displayed side by side. Information including the distance to the ground and changes in altitude can be easily grasped.

Note that the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, when the sectional view drawing unit 30 draws each of the sectional view images of the plurality of travel routes, additional information regarding the altitude of each travel route may be additionally drawn. Specifically, the additional information on the altitude of the traveling route includes height information of a portion having the highest altitude in each traveling route (hereinafter, referred to as “Max altitude”) and a portion having the steepest inclination in each traveling route. Tilt angle information (hereinafter, “M
ax inclination ”), or an altitude difference between the highest altitude part and the lowest altitude part.

FIG. 6 is a diagram showing a display example of a sectional view image in a case where additional information relating to altitudes of a plurality of traveling routes is added and displayed. As shown in FIG.
For each of 1 ', R2', and R3 ', additional information 100, 101, and 102 are displayed in association with each traveling route. More specifically, (1) additional information 100 indicating that the maximum altitude is 205 m and the maximum inclination is 5 degrees is displayed for the travel route R1 ′, and (2) the travel route R1 ′.
For 2 ′, additional information 101 indicating that the Max altitude is 285 m and the Max inclination is 12 degrees is displayed,
(3) For the traveling route R3 ′, the Max altitude is 490
m, Max additional information indicating that the tilt is 16 degrees
Is displayed.

In the above-described embodiment, when a plurality of travel routes are searched, a planar map image of a range including each travel route and a cross-sectional view of each travel route are displayed side by side on the same screen. However, the cross-sectional view image may be transparently displayed in a part of the plane map image.

FIG. 7 is a diagram showing a display example in the case where a cross-sectional view image is transparently displayed in a partial area of a planar map image. FIG.
In the display example shown in Fig. 7, a planar map image is displayed using the entire display screen, and a cross-sectional image is transparently displayed in a lower region of the planar map image. As described above, the cross-sectional view image is transparently displayed so as to be superimposed on a partial area of the planar map image, so that the amount of map information can be increased.

In this case, in the area where the sectional view image is drawn, the character information indicating the place name and the like in the map information included in the planar map image is not displayed.
By performing processing that does not display some map information such as character information in a region where the cross-sectional image is displayed in an overlapping manner, the visibility of the cross-sectional image can be improved.

In the above-described embodiment, the plane map image and the sectional view image are displayed side by side on the screen. However, when a predetermined operation instruction is given using the remote control unit 4, the plane map image and the sectional view image are displayed. May be switched and displayed. FIG. 8 is a diagram illustrating a display example in a case where a planar map image and a cross-sectional view image are switched and displayed according to a predetermined operation instruction. 8A shows a display example of a planar map image, and FIG. 8B shows a display example of a sectional view image. These display screens are displayed by giving a predetermined operation instruction using the remote control unit 4. Is switched and displayed. By switching the display screen, it is possible to display a planar map image and a cross-sectional image having a large area, and it is possible to improve the visibility of each image.

Further, in the above-described embodiment, the plane map image is arranged on the upper side of the screen and the sectional view image is arranged on the lower side in the same screen. However, the arrangement position of each image is limited to this. Instead, various modified examples are conceivable, such as a case where a sectional view image is arranged on the upper side and a plane map image is arranged on the lower side.

In the above-described embodiment, the cross-sectional images corresponding to each of the plurality of traveling routes are displayed. However, the cross-sectional images correspond to the operation instructions performed using the remote control unit 4 and are selected on the planar map image. Alternatively, only the cross-sectional view corresponding to one traveling route described above may be displayed. In this case, by switching the traveling route to be selected using the remote control unit 4 while referring to the plane map image, only the cross-sectional view corresponding to each traveling route can be displayed. There is an advantage that a cross-sectional image of one traveling route can be more easily seen.

[0061]

As described above, according to the present invention, when a plurality of travel routes are searched, cross-sectional images of the respective travel routes are displayed. An appropriate traveling route can be selected in consideration of the above.

[Brief description of the drawings]

FIG. 1 is a diagram showing a detailed configuration of a navigation device.

FIG. 2 is a flowchart showing an operation procedure of the navigation device when displaying a cross-sectional view image of a plurality of traveling routes obtained by the route search and selecting one traveling route to be guided.

FIG. 3 is a diagram showing a display example of a planar map image and a sectional view image.

FIG. 4 is a flowchart showing an operation procedure of the navigation device when displaying a sectional view image of the guidance route in parallel with the route guidance processing.

FIG. 5 is a diagram showing a display example of a map image and a sectional view image of a traveling route during route guidance.

FIG. 6 is a diagram showing a display example of a cross-sectional view image when additional information relating to altitudes of a plurality of traveling routes is added and displayed.

FIG. 7 is a diagram illustrating a display example in a case where a cross-sectional view image is transparently displayed in a partial area of a planar map image.

FIG. 8 is a diagram illustrating a display example in a case where a planar map image and a sectional view image are switched and displayed according to a predetermined operation instruction.

[Explanation of symbols]

 Reference Signs List 1 navigation controller 4 remote control (remote control) unit 5 vehicle position detecting unit 6 display device 10 map buffer 14 map drawing unit 16 VRAM 20 vehicle position calculation unit 22 route search processing unit 24 route memory 26 search result drawing unit 28 route guidance processing unit 30 section drawing unit 32 input processing unit 34 image synthesis unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C032 HB02 HB22 HC08 HC15 HC22 HC26 HD04 HD16 HD30 2F029 AA02 AB01 AB07 AC03 AC09 AC14 AD01 5H180 AA01 BB13 CC12 FF04 FF05 FF07 FF22 FF27 FF32 FF35 FF37

Claims (13)

[Claims] 1. A route search means for searching for a plurality of travel routes connecting a departure place and a destination, and a second map drawing unit for drawing a planar map image including the plurality of travel routes searched by the route search means. 1 drawing means, 2nd drawing means for drawing a cross-sectional image of each of the plurality of travel routes searched by the route searching means, and the plane map image drawn by the first drawing means. Display means for displaying, on a screen, the sectional view image drawn by the second drawing means on a screen. 2. The navigation device according to claim 1, wherein the display unit displays the planar map image and the cross-sectional image side by side on the same screen. 3. The navigation device according to claim 1, wherein the display unit transparently displays the sectional view image in a partial area of the planar map image on the same screen. 4. The partial map image according to claim 3, wherein the first drawing unit is configured to perform a transparent display of the cross-sectional view image by the display unit on a partial area of the planar map image on which the cross-sectional view image overlaps. And a navigation device for hiding some of the map information. 5. The screen display of the planar map image according to claim 1, further comprising an operation unit for giving a display screen switching instruction, wherein the display unit displays the plane map image when the switching instruction is given using the operation unit. And a screen display of the cross-sectional image. 6. The travel route included in the planar map image and the cross-sectional view image according to claim 1, wherein the plurality of travel routes included in the two-dimensional map image and the cross-sectional view image are drawn so as to be distinguishable from each other, and correspond to the same travel route. A navigation device characterized in that the navigation device is drawn in a state where it is attached. 7. The apparatus according to claim 1, wherein the second drawing unit associates one of the axes with an altitude,
A navigation device, wherein a drawing corresponding to each of the plurality of traveling routes is performed by making a traveling distance correspond to the other axis. 8. The method according to claim 1, wherein the second drawing unit draws the cross-sectional image including the plurality of traveling routes and additional information on altitude of each traveling route. Navigation device. 9. The navigation device according to claim 8, wherein the additional information is inclination angle information of a steepest part in each traveling route. 10. The navigation device according to claim 8, wherein the additional information is height information of a portion having the highest altitude in each traveling route. 11. The navigation device according to claim 8, wherein the additional information is scale information indicating an altitude of each traveling route. 12. The selecting device according to claim 1, wherein the selecting device performs any one of the plurality of traveling routes searched by the route searching device, and the selecting device uses the selecting device. And a third drawing unit that draws a peripheral map image that displays map information around the vehicle at a predetermined display magnification along one of the traveling routes selected by the control unit. The navigation device displays the surrounding map image and the cross-sectional image on the same screen when one of the traveling routes is selected by the means. 13. The vehicle according to claim 12, wherein the second drawing unit draws a predetermined vehicle mark at a position along the traveling route selected by the selection unit and corresponding to an actual vehicle position. A navigation device characterized in that: