WO2009081500A1

WO2009081500A1 - Route guiding device, route guiding method, route guiding program, and recording medium

Info

Publication number: WO2009081500A1
Application number: PCT/JP2007/075002
Authority: WO
Inventors: Seiji Yamanushi; Tokutaro Hirano; Tetsuro Shimamura; Yukihito Nakamura
Original assignee: Pioneer Corporation
Priority date: 2007-12-26
Filing date: 2007-12-26
Publication date: 2009-07-02
Also published as: JPWO2009081500A1; JP4969659B2

Abstract

When map information is displayed on a display screen by a display unit (101), the scale of the map information displayed on the display screen (herein referred to “displayed map information”) is detected by a detection unit (102). Guide information on a route is then generated by a generation unit (103) according to the scale of the displayed map information. For example, the guide information is generated by using information on features of types according to the scale of the displayed map information. The guide information is outputted by an output unit (104).

Description

Route guidance device, route guidance method, route guidance program, and recording medium

The present invention relates to a route guidance device, a route guidance method, a route guidance program, and a recording medium that generate guidance information related to a route according to the scale of map information displayed on a display screen.

2. Description of the Related Art Conventionally, there has been proposed a vehicle navigation device that detects a traveling environment of a vehicle, selects guidance information corresponding to the traveling environment from a plurality of guidance information, and outputs the guidance information by voice (for example, the following) (See Patent Document 1). This vehicle navigation apparatus automatically outputs guidance information having contents corresponding to the traveling environment of the vehicle by voice.

Japanese Patent Laid-Open No. 10-141979

However, in the technique of the above-mentioned Patent Document 1, for example, when the vehicle speed is slow due to traffic jams or the like, guidance information corresponding to the speed can be output, but map information with a large scale is displayed by the user's operation. For example, when the user desires detailed guidance information, the detailed guidance information cannot be output. Further, there is a problem in that simple guidance information cannot be output when the user desires simple guidance information, such as when wide-area map information is displayed by a user's operation.

In order to solve the above-described problems and achieve the object, the route guidance device according to the invention of claim 1 includes display means for displaying map information on a display screen, and map information displayed on the display screen (hereinafter, referred to as “display information”). Detection means for detecting a scale of “display map information”, generation means for generating guidance information on a route according to the scale of the display map information, and output means for outputting the guidance information It is characterized by.

According to a ninth aspect of the present invention, there is provided a route guidance method for detecting a display step of displaying map information on a display screen and a scale of map information (hereinafter referred to as “display map information”) displayed on the display screen. And a generating step for generating guidance information relating to a route according to the scale of the display map information, and an output step for outputting the guidance information.

The route guidance program according to the invention of claim 10 causes a computer to execute the route guidance method according to claim 9.

A recording medium according to an eleventh aspect of the invention is characterized in that the route guidance program according to the tenth aspect is recorded in a computer-readable state.

FIG. 1 is a block diagram showing a functional configuration of the route guidance apparatus according to the present embodiment. FIG. 2 is a flowchart showing a route guidance processing procedure of the route guidance device. FIG. 3 is a block diagram of a hardware configuration of the navigation device according to the present embodiment. FIG. 4 is a flowchart showing the contents of processing of the navigation device. FIG. 5 is an explanatory diagram showing an example of guidance information when the scale is greater than or equal to the first threshold value. FIG. 6 is an explanatory diagram illustrating an example of guidance information when the scale is greater than or equal to the second threshold and less than the first threshold. FIG. 7 is an explanatory diagram illustrating an example of guidance information when the scale is less than the second threshold.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Route guidance apparatus 101 Display part 102 Detection part 103 Generation part 104 Output part

Hereinafter, preferred embodiments of a route guidance device, a route guidance method, a route guidance program, and a recording medium according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment)
(Functional configuration of route guidance device)
First, the functional configuration of the route guidance apparatus 100 according to the embodiment of the present invention will be described. FIG. 1 is a block diagram showing a functional configuration of the route guidance apparatus according to the present embodiment.

In FIG. 1, the route guidance apparatus 100 includes a display unit 101, a detection unit 102, a generation unit 103, and an output unit 104. The display unit 101 includes a display screen that displays map information. Here, the map information is stored in a storage unit (not shown). The map information includes road network data composed of nodes and links, and image data drawn using features relating to facilities, roads, and other terrain (mountains, rivers, land). The map information may include character information, information such as facility names and addresses, road and facility images, and the like.

Further, the display unit 101 may display map information set to a desired scale by the user on the display screen. Further, the display unit 101 may display map information having a scale larger than the scale of map information other than the vicinity of the intersection in the vicinity of the intersection on the guidance route on the display screen.

The detection unit 102 detects the scale of the map information (hereinafter referred to as “display map information”) displayed on the display screen. Specifically, for example, the detection unit 102 detects the ratio between the distance on the display map information and the actual distance. Moreover, the detection part 102 may detect the reduced scale set by the user, for example.

The generation unit 103 generates guidance information related to the route according to the scale of the display map information. The guidance information regarding the route is text information, voice information, or the like, and may be guidance information for guiding the user to the destination point, or may be information such as a feature or terrain on the route.

Further, the generation unit 103 may generate guide information using information on a type of feature corresponding to the scale of the display map information. Furthermore, the generation unit 103 may generate guidance information using information on features that are types of features according to the scale of the display map information and are included in the display map information.

The generation unit 103 generates guidance information using information about facilities when, for example, the scale of the display map information is a predetermined value or more. Specifically, guidance information such as “Turn right at the intersection where A store is located” is generated. At this time, you may make it produce | generate the guidance information using the information regarding a facility irrespective of display map information. In addition, facilities may be displayed on the display map information, and guidance information using information on facilities included in the display map information may be generated. In this case, a traffic signal, a telephone pole or a sign described later may or may not be displayed on the display map information. Here, the predetermined value may be set in advance or may be set by the user.

For example, when the scale of the display map information is equal to or greater than a predetermined value, the generation unit 103 generates guidance information using information on traffic lights, telephone poles, or signs. Specifically, guidance information such as “Turn right at the next signal” is generated. At this time, you may make it produce | generate the guidance information using the information regarding a traffic light, a telephone pole, or a sign irrespective of display map information. In addition, a traffic signal, a telephone pole, or a sign may be displayed on the display map information to generate guidance information using information on facilities included in the display map information. In this case, the facility may or may not be displayed on the display map information. Here, the predetermined value may be set in advance or may be set by the user.

The generation unit 103 generates guide information without using information about the feature when the scale of the display map information is less than a predetermined value. Specifically, guidance information such as “Turn right at the intersection 500 m ahead” is generated. In this case, the display map information may or may not display facilities, traffic lights, telephone poles, or signs. Here, the predetermined value may be set in advance or may be set by the user.

The generation unit 103 generates guide information using a unit of distance according to the scale of the display map information. For example, when the scale is greater than or equal to a predetermined value, guidance information using a distance of 10 m is generated. Specifically, guidance information “Please turn right at the intersection 50 meters ahead” is generated, and then guidance information “Please turn right at the intersection 20 meters ahead” is generated. Further, for example, when the scale is less than a predetermined value, guidance information using a distance of 100 m is generated. Specifically, guidance information “Please turn right at an intersection 300 m ahead” is generated, and then guidance information “Please turn right at an intersection 100 m ahead” is generated.

The output unit 104 outputs guidance information. The output unit 104 may output the guide information at a timing according to the scale of the display map information. Specifically, for example, when the scale is a predetermined value or more, the guide information is output at an interval shorter than the predetermined interval. Specifically, guidance information is output every 30 m. When the scale is less than a predetermined value, the guide information is output at an interval longer than the predetermined interval. Specifically, guidance information is output every 200 m.

(Route guidance processing procedure of the route guidance device)
Next, a route guidance processing procedure of the route guidance device 100 will be described. FIG. 2 is a flowchart showing a route guidance processing procedure of the route guidance device. In the flowchart of FIG. 2, first, the display unit 101 waits until map information is displayed on the display screen (step S201: No loop), and when map information is displayed (step S201: Yes), detection is performed. The scale of the display map information is detected by the unit 102 (step S202).

Next, according to the scale of the display map information detected in step S202, the generation unit 103 generates guidance information regarding the route (step S203). In step S203, for example, the guidance information using information on the type of feature corresponding to the scale of the display map information is generated. And guidance information is output by the output part 104 (step S204), and a series of processes are complete | finished.

In the flowchart of FIG. 2, after detecting the scale of the display map information in step S202, it is determined whether or not the scale is greater than or equal to a predetermined value. Or, the guide information using the information on the traffic light, the telephone pole or the sign is generated. If the scale is less than the predetermined value, guide information is generated in step S203 without using information related to the feature. Furthermore, in step S203, guidance information may be generated using a unit of distance corresponding to the scale of the display map information.

In the flowchart of FIG. 2, when the guide information is output in step S204, the guide information may be output at a timing corresponding to the scale of the display map information.

According to the route guidance device 100 according to the above-described embodiment, the detection unit 102 detects the scale of the display map information. Then, according to the scale of the display map information, guidance information regarding the route can be generated by the generation unit 103, and the guidance information can be output by the output unit 104. Therefore, detailed guidance information can be output when the user desires detailed guidance information, and simple guidance information can be output when simple guidance information is desired. Thereby, for example, since unnecessary guide information is not output, the user can obtain easy-to-understand guide information without feeling bothered by the guide.

In addition, according to the route guidance device 100 according to the embodiment, the generation unit 103 can generate guidance information using information on a type of feature corresponding to the scale of the display map information. Thereby, the user can obtain easy-to-understand guidance information.

In addition, according to the route guidance device 100 according to the embodiment, the generation unit 103 guides using information on a feature that is a type of feature corresponding to the scale of the display map information and is included in the display map information. Information can be generated. Thereby, the user can obtain easy-to-understand guidance information that matches the display map information.

In addition, according to the route guidance device 100 according to the embodiment, the generation unit 103 can generate guidance information using information about facilities when the scale of the display map information is a predetermined value or more. As a result, the user can obtain detailed guidance information when detailed guidance information is desired.

In addition, according to the route guidance device 100 according to the embodiment, when the scale of the display map information is greater than or equal to a predetermined value, the generation unit 103 generates guidance information using information on traffic lights, telephone poles, or signs. Can do. As a result, the user can obtain more detailed guidance information when detailed guidance information is desired.

Further, according to the route guidance device 100 according to the embodiment, when the scale of the display map information is less than a predetermined value, the guidance information can be generated without using the information regarding the feature. Thereby, the user can obtain simple guidance information when simple guidance information is desired.

Further, according to the route guidance device 100 according to the embodiment, the generation unit 103 can generate the guidance information using the unit of distance according to the scale of the display map information. Thereby, the user can obtain guidance information suitable for the displayed map information.

Further, according to the route guidance device 100 according to the embodiment, the output unit 104 can output the guidance information at a timing according to the scale of the display map information. As a result, the user can obtain the guidance information at a timing suitable for the displayed map information.

Hereinafter, examples of the present invention will be described. In the present embodiment, an example in which the route guidance device of the present invention is implemented by a navigation device mounted on a moving body such as a vehicle (including a four-wheeled vehicle and a two-wheeled vehicle) will be described.

(Hardware configuration of navigation device)
Next, a hardware configuration of the navigation device 300 according to the present embodiment will be described. FIG. 3 is a block diagram of a hardware configuration of the navigation device according to the present embodiment. In FIG. 3, the navigation device 300 includes a CPU 301, a ROM 302, a RAM 303, a magnetic disk drive 304, a magnetic disk 305, an optical disk drive 306, an optical disk 307, an audio I / F (interface) 308, and a microphone 309. A speaker 310, an input device 311, a video I / F 312, a display 313, a communication I / F 314, a GPS unit 315, various sensors 316, and a camera 317. Each component 301 to 317 is connected by a bus 320.

First, the CPU 301 governs overall control of the navigation device 300. The ROM 302 records programs such as a boot program, a data update program, a scale detection program, and a guide information generation program. The RAM 303 is used as a work area for the CPU 301. That is, the CPU 301 controls the entire navigation device 300 by executing various programs recorded in the ROM 302 while using the RAM 303 as a work area.

The scale detection program detects the scale of map information (hereinafter referred to as “display map information”) displayed on the display 313 to be described later. Specifically, for example, the ratio between the distance on the display map information and the actual distance is detected. For example, the scale set by the user may be detected.

The guidance information generation program generates guidance information related to the route according to the scale of the display map information detected by the scale detection program. Specifically, as will be described in detail with reference to FIGS. 5 to 7, generation of guidance information using information on features included in the display map information, which is a type of feature corresponding to the scale of the display map information. Let Various programs may be recorded on a magnetic disk 305 or an optical disk 307 described later.

The magnetic disk drive 304 controls the reading / writing of the data with respect to the magnetic disk 305 according to control of CPU301. The magnetic disk 305 records data written under the control of the magnetic disk drive 304. As the magnetic disk 305, for example, an HD (hard disk) or an FD (flexible disk) can be used.

The optical disk drive 306 controls reading / writing of data with respect to the optical disk 307 according to the control of the CPU 301. The optical disk 307 is a detachable recording medium from which data is read according to the control of the optical disk drive 306. As the optical disc 307, a writable recording medium can be used. As a removable recording medium, in addition to the optical disk 307, an MO, a memory card, or the like may be used.

Examples of information recorded on the magnetic disk 305 and the optical disk 307 include map information and function information. The map information includes background data that represents features (features) such as buildings, rivers, and the ground surface, and road shape data that represents the shape of the road, and is composed of multiple data files divided by district. ing.

The road shape data further has traffic condition data. The traffic condition data includes, for example, whether or not there is a signal or a pedestrian crossing, whether or not there is a highway doorway or junction, the length (distance) of each link, road width, direction of travel, road type (highway, Such as toll roads and general roads).

The function information is 3D data representing the shape of the facility on the map, character data representing the description of the facility, and other various data other than the map information. Map information and function information are recorded in blocks divided into districts or functions. Specifically, for example, the map information is recorded in such a state that each map can be divided into blocks so that each map represents a predetermined district on the map displayed on the display screen. Further, for example, the function information is recorded in a state where each function can be divided into a plurality of blocks so as to realize one function.

In addition to the above-described three-dimensional data and character data, the function information is data for realizing functions such as program data for realizing route search, calculation of required time, route guidance, and the like. Each of the map information and the function information is composed of a plurality of data files divided for each district or for each function.

The voice I / F 308 is connected to a microphone 309 for voice input and a speaker 310 for voice output. The sound received by the microphone 309 is A / D converted in the sound I / F 308. For example, the microphone 309 may be installed near the sun visor of the vehicle, and the number thereof may be one or more. From the speaker 310, a sound obtained by D / A converting a predetermined sound signal in the sound I / F 308 is output. Note that the sound input from the microphone 309 can be recorded on the magnetic disk 305 or the optical disk 307 as sound data.

The input device 311 includes a remote controller, a keyboard, a touch panel, and the like provided with a plurality of keys for inputting characters, numerical values, various instructions, and the like. The input device 311 may be realized by any one form of a remote control, a keyboard, and a touch panel, but can also be realized by a plurality of forms.

The video I / F 312 is connected to the display 313. Specifically, the video I / F 312 is output from, for example, a graphic controller that controls the entire display 313, a buffer memory such as a VRAM (Video RAM) that temporarily records image information that can be displayed immediately, and a graphic controller. And a control IC for controlling the display 313 based on the image data to be processed.

The display 313 displays icons, cursors, menus, windows, or various data such as characters and images. On the display 313, the above-described map information is drawn two-dimensionally or three-dimensionally. In the map information displayed on the display 313, a mark or the like representing the current position of the vehicle on which the navigation device 300 is mounted can be displayed in an overlapping manner. The current position of the vehicle is calculated by the CPU 301.

As the display 313, for example, a CRT, a TFT liquid crystal display, a plasma display, or the like can be used. The display 313 is installed near the dashboard of the vehicle, for example. A plurality of displays 313 may be installed in the vehicle, for example, in the vicinity of the dashboard of the vehicle or in the vicinity of the rear seat of the vehicle.

The communication I / F 314 is connected to the network via wireless and functions as an interface between the navigation device 300 and the CPU 301. The communication I / F 314 is further connected to a communication network such as the Internet via wireless, and also functions as an interface between the communication network and the CPU 301.

Communication networks include LAN, WAN, public line network and mobile phone network. Specifically, the communication I / F 314 includes, for example, an FM tuner, a VICS (Vehicle Information and Communication System) / beacon receiver, a radio navigation device, and other navigation devices. Get road traffic information such as regulations. VICS is a registered trademark. The communication I / F 314 is configured by an in-vehicle wireless device that performs two-way wireless communication with a wireless device installed on the roadside when using, for example, DSRC (Dedicated Short Range Communication), and traffic information and map information Get various information. A specific example of DSRC is ETC (non-stop automatic fee payment system).

The GPS unit 315 receives radio waves from GPS satellites and outputs information indicating the current position of the vehicle. The output information of the GPS unit 315 is used when the CPU 301 calculates the current position of the vehicle together with output values of various sensors 316 described later. The information indicating the current position is information for specifying one point on the map information such as latitude / longitude and altitude.

The various sensors 316 output information for determining the position and behavior of the vehicle, such as a vehicle speed sensor, an acceleration sensor, and an angular velocity sensor. The output values of the various sensors 316 are used by the CPU 301 to calculate the current position of the vehicle and the amount of change in speed and direction.

The camera 317 captures images inside or outside the vehicle. The image may be either a still image or a moving image. For example, the camera 317 captures the behavior of a passenger inside the vehicle, and outputs the captured image to a recording medium such as the magnetic disk 305 or the optical disk 307 via the image I / F 312. To do. The camera 317 captures a situation outside the vehicle, and outputs the captured video to a recording medium such as the magnetic disk 305 or the optical disk 307 via the video I / F 312. Further, the camera 317 has an infrared camera function, and the surface temperature distributions of objects existing inside the vehicle can be relatively compared based on video information captured using the infrared camera function. The video output to the recording medium is overwritten and stored.

The display unit 101, the detection unit 102, the generation unit 103, and the output unit 104 included in the route guidance device 100 illustrated in FIG. 1 are recorded in the ROM 302, the RAM 303, the magnetic disk 305, the optical disk 307, and the like in the navigation device 300 illustrated in FIG. The CPU 301 executes a predetermined program using the programmed program and data, and realizes its function by controlling each part in the navigation device 300.

That is, the navigation apparatus 300 according to the embodiment has the functions provided in the route guidance device shown in FIG. 1 by executing the route guidance program recorded in the ROM 302 as a recording medium in the navigation device 300, as shown in FIG. The route guidance processing procedure can be executed.

(Contents of navigation device processing)
Next, the processing contents of the navigation device 300 will be described. FIG. 4 is a flowchart showing the contents of processing of the navigation device. In the flowchart of FIG. 4, first, the process waits until map information is displayed on the display 313 (step S401: No loop). If map information is displayed (step S401: Yes), the scale detection program is executed. Thus, the scale of the display map information is detected (step S402).

Next, it is determined whether or not the scale of the display map information detected in step S402 is greater than or equal to the first threshold (step S403). If it is determined in step S403 that the scale is greater than or equal to the first threshold (step S403: Yes), a signal, a telephone pole or a sign is displayed on the display map information displayed on the display 313 (step S404), and the process proceeds to step S408. . In step S404, facilities or the like may or may not be displayed on the display map information.

When it is determined in step S403 that the scale is less than the first threshold (step S403: No), it is determined whether or not the scale is equal to or greater than the second threshold (step S405). Here, the second threshold is a value smaller than the first threshold. If the scale is greater than or equal to the second threshold in step S405 (step S405: Yes), the facility is displayed on the display map information displayed on the display 313 (step S406), and the process proceeds to step S408. In step S406, a signal, a telephone pole, a sign, or the like may or may not be displayed on the display map information.

In step S405, when it is determined that the scale is less than the second threshold (step S405: No), the display map information displayed on the display 313 does not display features such as facilities, signals, telephone poles, or signs (step). S407), the process proceeds to step S408.

Next, a unit of distance corresponding to the scale determined in step S403 and step S405 is set (step S408). Then, the guide information generation program is executed to generate guide information using the information on the feature displayed in step S404 or step S406 and the unit of distance set in step S408 according to the scale. (Step S409). In step S409, when the feature is not displayed in the display map information in step S407, the guidance information is used by using the unit of distance according to the scale set in step S408 without using the information related to the feature. Is generated.

And it waits until it becomes the timing of guidance according to a scale (step S410: No loop), and when it becomes the timing of guidance according to a scale (step S410: Yes), guidance information is output (step) S411), a series of processing ends. In step S411, for example, guidance information is output from the speaker 310 or the like under the control of the audio I / F 308.

In the flowchart of FIG. 4, when it is determined in step S403: Yes that the scale is greater than or equal to the first threshold, a signal, a telephone pole, or a sign is displayed on the display map information displayed on the display 313, and step S405: Yes. When the scale is equal to or larger than the second threshold value, the facility is displayed on the display map information displayed on the display 313. However, the present invention is not limited to this. For example, signals, telephone poles, signs, or facilities may not be displayed on the display map information.

(About an example of guidance information)
Next, an example of guidance information will be described. First, with reference to FIG. 5, guidance information when the scale is determined to be equal to or greater than the first threshold value in Step S <b> 403: Yes of FIG. 4 will be described. FIG. 5 is an explanatory diagram showing an example of guidance information when the scale is greater than or equal to the first threshold value. As shown in FIG. 5, the display 313 displays a scale 501 that is greater than or equal to the first threshold, a user's current location 502, a signal 503, and a sign 504. Therefore, when the scale 501 is equal to or larger than the first threshold value, guidance information using the signal 503 or the sign 504 is generated. In the case of the scale 501 that is equal to or greater than the first threshold, the guidance timing is when the current location of the user reaches the distance D1 from the intersection.

Thus, when the current location of the user reaches D1, guidance information using the signal 503 or the sign 504 is output. Specifically, output guidance information such as “Turn right at the intersection with traffic lights 20m ahead” or “Turn right at the intersection with one-way signs 20m ahead”. .

Next, with reference to FIG. 6, the guidance information when the scale is determined to be less than the first threshold in Step S403: No in FIG. 4 and the scale is determined to be greater than or equal to the second threshold in Step S405: Yes will be described. FIG. 6 is an explanatory diagram illustrating an example of guidance information when the scale is greater than or equal to the second threshold and less than the first threshold. As shown in FIG. 6, the display 313 displays a scale 601 that is greater than or equal to the second threshold and less than the first threshold, the user's current location 602, a facility A 603, a facility B 604, and a facility C 605. Yes. Therefore, in the case of the scale 601 that is equal to or larger than the second threshold and smaller than the first threshold, guidance information using the facility A 603, the facility B 604, or the facility C 605 is generated. In the case of the scale 601 that is equal to or greater than the second threshold value and less than the first threshold value, the guidance timing is when the current location of the user reaches the distance D2 from the intersection.

Thus, when the current location of the user reaches D2, guidance information using the facility A603 is output. Specifically, guidance information such as “Turn right at the intersection with facility A 100 m ahead” is output.

Next, with reference to FIG. 7, guidance information when the scale is determined to be less than the second threshold in Step S405: Yes will be described. FIG. 7 is an explanatory diagram illustrating an example of guidance information when the scale is less than the second threshold. As shown in FIG. 7, the display 313 displays a scale 701 that is less than the second threshold and the current location 702 of the user. Therefore, in the case of the scale 701 less than the second threshold, the guide information is generated without using the feature. In the case of the scale 701 less than the second threshold, the guidance timing is when the current location of the user reaches the distance D3 from the intersection.

This will output guidance information that does not use features when the user's current location reaches D3. Specifically, guidance information such as “Turn right at the intersection 200 m ahead” is output.

According to the navigation device 300 according to the above-described embodiment, the detection unit 102 detects the scale of the display map information. Then, according to the scale of the display map information, guidance information regarding the route can be generated by the generation unit 103, and the guidance information can be output by the output unit 104. Therefore, detailed guidance information can be output when the user desires detailed guidance information, and simple guidance information can be output when simple guidance information is desired. Thereby, for example, since unnecessary guide information is not output, the user can obtain easy-to-understand guide information without feeling bothered by the guide.

Further, according to the navigation device 300 according to the embodiment, it is possible to generate guidance information using information on the types of features according to the scale of the display map information. Thereby, the user can obtain easy-to-understand guidance information.

In addition, according to the navigation device 300 according to the embodiment, it is possible to generate guidance information using information on a feature that is a feature according to the scale of the display map information and is included in the display map information. . Thereby, the user can obtain easy-to-understand guidance information that matches the display map information.

Further, according to the navigation device 300 according to the embodiment, when the scale of the display map information is equal to or greater than the first threshold value, it is possible to generate guidance information using information on traffic lights, telephone poles, or signs. As a result, the user can obtain more detailed guidance information when detailed guidance information is desired.

Further, according to the navigation device 300 according to the embodiment, when the scale of the display map information is equal to or larger than the second threshold value, it is possible to generate guidance information using information about the facility. As a result, the user can obtain detailed guidance information when detailed guidance information is desired.

Further, according to the navigation device 300 according to the embodiment, when the scale of the display map information is less than the second threshold value, the guide information can be generated without using the information regarding the feature. Thereby, the user can obtain simple guidance information when simple guidance information is desired.

Further, according to the navigation device 300 according to the embodiment, the guide information can be generated using a unit of distance corresponding to the scale of the display map information. Thereby, the user can obtain guidance information suitable for the displayed map information.

In addition, according to the navigation device 300 according to the embodiment, the guide information can be output at a timing corresponding to the scale of the display map information. As a result, the user can obtain the guidance information at a timing suitable for the displayed map information.

Note that the route guidance method described in the present embodiment can be realized by executing a program prepared in advance on a computer such as a personal computer, a workstation, or a mobile terminal device (mobile phone). This program is recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, and a DVD, and is executed by being read from the recording medium by the computer. The program may be a transmission medium that can be distributed via a network such as the Internet.

Claims

Display means for displaying map information on the display unit;
Detecting means for detecting a scale of map information (hereinafter referred to as “display map information”) displayed on the display unit;
Generating means for generating guidance information about the route according to the scale of the display map information;
Output means for outputting the guidance information;
A route guidance device comprising:
2. The route guidance device according to claim 1, wherein the generation unit generates the guidance information using information on a type of feature corresponding to a scale of the display map information.
The said generation means is the type of the feature according to the reduced scale of the said display map information, Comprising: The said guidance information using the information regarding the feature contained in the said display map information is produced | generated. The route guidance device described in 1.
4. The route guidance device according to claim 2, wherein the generation unit generates the guidance information using information related to a facility when the scale of the display map information is a predetermined value or more.
4. The route according to claim 2, wherein the generation unit generates the guide information using information on a traffic light, a telephone pole, or a sign when the scale of the display map information is a predetermined value or more. Guide device.
2. The route guidance device according to claim 1, wherein the generation unit generates the guidance information without using information about a feature when the scale of the display map information is less than a predetermined value.
The route guidance device according to any one of claims 1 to 6, wherein the generation unit generates the guidance information using a unit of distance corresponding to a scale of the display map information.
The route guidance device according to any one of claims 1 to 7, wherein the output means outputs the guidance information at a timing corresponding to a scale of the display map information.
A display step of displaying map information on the display unit;
A detection step of detecting a scale of map information (hereinafter referred to as “display map information”) displayed on the display unit;
In accordance with the scale of the display map information, a generation step for generating guidance information about the route,
An output step of outputting the guidance information;
A route guidance method comprising:
A route guidance program for causing a computer to execute the route guidance method according to claim 9.
A computer-readable recording medium on which the route guidance program according to claim 10 is recorded.