JPH11148834A - Map display device, map display method, and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily obtain a remaining distance from an arbitrary point to a destination point on a guide course, and to surely recognize it when reaching a point with a specified amount of remaining distance. SOLUTION: A CD block 8 mounted with a map CD-ROM 7 where a map data is stored, a key block 6 comprising a key for specifying a departure point and a destination point, and a CPU 13 wherein, using the map data, a course from the departure point to the destination point is calculated, and the obtained course is provided with a point symbol of specified interval according to a distance from the destination point for display on a monitor block 9, are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device, a map display method, and a recording medium applied to an automobile navigation device and the like.

[0002]

2. Description of the Related Art Conventionally, GPS (Global Po
2. Description of the Related Art Navigation devices for automobiles using a positioning system have been widely used. In this type of navigation device, the latitude information and the longitude information of the current position are calculated based on signals from a plurality of artificial satellites received by a GPS antenna, and the road around the current position read from a recording medium such as a CD-ROM is calculated. Map data including information and place name information is developed and displayed on a monitor display.

One of the basic functions of this type of navigation device is a route guidance function. This route guidance function calculates the shortest distance route from the departure point to the destination point by inputting only the destination point with the departure point and the destination point, or the current point as the departure point, and converts the calculated route to another road. When the function is executed, the remaining travel distance from the current position on the route to the destination is always displayed on the screen in units of 0.1 km, for example.

[0004]

However, the remaining mileage displayed by the route guidance function is a distance value from the current position on the route to the destination as described above, and is determined from any point on the route. There is no display of the remaining mileage to the destination, and if you want to know the remaining mileage from any point, you need to set that point as a stop-by designation condition and then search the route again. .

Further, in order to know whether or not the user has arrived at a point with a desired remaining travel distance, the display of the ever-changing remaining travel distance must be constantly checked.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to easily know a remaining traveling distance from an arbitrary point on a guidance route to a destination. It is also an object of the present invention to provide a map display device, a map display method, and a recording medium that can reliably recognize when a user reaches a point with a predetermined remaining mileage desired.

[0007]

According to the first aspect of the present invention,
Map storage means for storing map data; designating means for designating a starting point and a destination point in the map data;
Route calculating means for calculating a route from the departure point designated by the designating means to the destination using the map data stored in the map storing means; and points at fixed intervals on the route obtained by the route calculating means. Display means for displaying with a symbol attached.

With such a configuration, the remaining distance from any point on the guidance route to the destination can be recognized at a glance. According to a second aspect of the present invention, in the first aspect of the present invention, the display means further comprises a setting means for variably setting a fixed interval of point symbols displayed on the route.

With this configuration, in addition to the effect of the first aspect of the present invention, the interval between the point symbols to be displayed can be variably set so that the user can easily see it, so that the usability is further improved. Can be done.

According to a third aspect of the present invention, in the first or the second aspect of the present invention, the positioning means for positioning the current position of the vehicle and the current position obtained by the positioning means coincide with the position of the point symbol. And a notifying means for notifying the user in such a case.

With this configuration, in addition to the operation of the first or second aspect of the present invention, a notification is made at a point where a predetermined remaining distance is reached to the destination, thereby imposing an extra burden on the user. The arrival at the point can be notified without the need.

The invention according to claim 4 uses map storage means for storing map data, designating means for designating a departure point and a destination point in the map data, and using the map data stored in the map storage means. A route calculating means for calculating a route from the departure point specified by the specifying means to the destination; a positioning means for positioning the current position of the self; an input means for inputting arbitrary distance data; and the positioning means. When the obtained current position coincides with a position corresponding to the distance data obtained by the input means on the route, a notifying means for notifying the position is provided.

[0013] With this configuration, the user is notified at the point where the user has entered the predetermined remaining distance to the destination point, so that the user can be notified of the arrival at the point without imposing an extra burden. Can be.

According to a fifth aspect of the present invention, a map storage means for storing map data, a designating means for designating a starting point and a destination point in the map data, and the map data stored in the map storage means are used. A route calculating means for calculating a route from the departure point specified by the specifying means to the destination, an input means for inputting arbitrary distance data,
Display means for displaying a position on the route corresponding to the distance data obtained by the input means with a point symbol attached thereto.

With this configuration, it is possible to easily visually recognize the position on the guidance route at the point where the user has entered the predetermined remaining distance to the destination point. The invention according to claim 6 is a map display method applied to a map display device that reads out map data from a storage medium and expands and displays the map data, wherein a starting point and a destination point are designated, and the designated starting point is changed to the destination point. It is characterized in that a route to be reached is calculated by reading the map data from a medium storing the map data, and the obtained route is displayed with point symbols at a constant interval.

According to such a method, the remaining distance from an arbitrary point on the guidance route to the destination can be recognized at a glance. According to a seventh aspect of the present invention, there is provided a recording medium storing a program for a map display device for developing and displaying map data, wherein the map display device stores a program from a starting point to a destination point calculated based on the map data. A program for displaying a route with point symbols attached at regular intervals is recorded. With such recorded contents, the remaining distance from any point on the guidance route to the destination can be recognized at a glance.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment in which the present invention is applied to an automobile navigation device using GPS will be described below with reference to the drawings.

FIG. 1 shows a circuit configuration of the entire apparatus. As a GPS receiving function, a GPS antenna 1 installed on a roof of a vehicle body and an L1 band (a L1 band) received from a plurality of GPS satellites received by the GPS antenna 1 are shown. 1.57542GH
z) C / A code data is demodulated by a despread LSI,
It has a GPS block 2 that decodes and determines the latitude, longitude, height, time, and traveling direction of the current location.

The GPS block 2 is connected to a graphic block 3. The graphic block 3 includes an FM antenna 4, a beacon antenna 5, a key block 6 having various input keys including cursor keys and numeric keys, A CD block 8 on which a map CD-ROM 7, which is a recording medium for recording map data including road information and place name information, is mounted, for example, a monitor block 9 having a color LCD panel and a display device including a driving circuit thereof; and D / for converting guide voice data to analog
The A conversion units 10 are connected respectively.

The graphic block 3 includes a ROM 11
CPU 1 that controls the entire apparatus based on the operation program read from the CPU and various data stored in RAM 12
3 are provided.

In the graphic block 3, an FM radio wave received by the FM antenna 4 is demodulated to obtain an FM demodulated signal of a desired broadcasting station, and an FM demodulator decodes data multiplexed on the obtained FM demodulated signal. A multiplex receiver 14, a beacon receiver 15 for demodulating a beacon radio wave received by the beacon antenna 5 to obtain data, and a traffic control by performing tuning control in the FM multiplex receiver 14 and reception control in the beacon receiver 15. A traffic information processing controller 16 for receiving information, mainly the GPS block 2, the key block 6, the CD block 8, the traffic information controller 16 and a data input / output between the CPU 13 and the timer unit 17 for measuring the current time. CPU peripheral circuit gate array (G / A) 18 for controlling Roller 19 is above ROM11, RA
M12 and CPU 13 are provided in a bus connection.
0 is connected.

When traveling on a road, the CPU 4 controls the G
When the latitude and longitude data of the current point, that is, the position data is sent from the PS block 2 together with the data indicating the other height, time, and traveling direction, the position data is used as a CP.
The map data at an arbitrary scale around the current location is called from the CD block 8 via the U peripheral circuit G / A 18 and is sent out as display data to the graphic controller 19 to which the video RAM 20 is connected. VICS (Vehicle Information) of FM data multiplex broadcasting and radio beacon via the communication device 15 and the traffic information processing controller 16
and CommunicationSystem:
When traffic information based on the road traffic information communication system is sent, the scale of the map displayed at that time is V
If it is in the scale range corresponding to the ICS, the transmitted traffic information is expanded and the graphic controller 1 is used.
9 and linked to the display data in the video RAM 20.

In the graphic controller 19, the CP
The map data linked from the traffic information transmitted from U13 is developed on the video RAM 20 to create display data for each screen, and the created display data is sent to the monitor block 9 to display the traffic information and the map. Display.

Also, voice data necessary for a guide message in a state set in advance by the position data of the current position and map data in the vicinity of the current position, for example, a state in which the vehicle is approaching a turning point in a set guidance route, is stored in the ROM 11.
Are read out in combination from those stored in the D / A converter 10 and sent to the D / A converter 10. After the audio data analogized by the D / A converter 10 is appropriately amplified by the amplifier 21, the speaker By the loudspeaker output by the unit 22, a guide message with a voice of the navigation operation is issued to the user of the apparatus in addition to the display on the monitor block 9.

Further, when executing the route guidance function, the graphic controller 19 also displays a guidance route in which point marks at regular intervals according to the remaining traveling distance to the destination are arranged in the map data.

The ROM 11 stores, in addition to the operation program and audio data of the CPU 13, the frequencies of the broadcasting stations in various places that provide VICS traffic information data as data multiplexed on FM broadcast radio waves, It is assumed that the position information and the like of the target area are registered and set in advance.

Next, the operation of the above embodiment will be described. FIG. 2 mainly shows the processing performed by the CPU 13 when setting a guidance route after selecting the route guidance function. At first, map data including roads in an arbitrary area is first stored in a CD by key operation on the key block 6. Block 8
And sends it to the graphic controller 19, expands and stores it in the video RAM 20, and displays it on the monitor block 9 (step A1).

While the map including the road is displayed on the monitor block 9 in this manner, the screen is scrolled appropriately,
Alternatively, the start point and the destination point of the guidance route are changed to the key block 6 while changing the displayed range by changing the scale.
The input is set by operating the key (step A2). At this time, when the current position is set as the departure point, the input can be omitted.

Next, after inputting and setting search conditions such as the input of a waypoint and the priority of a toll road (step A).
3) It is determined based on the presence or absence of a predetermined key operation whether or not the display setting of the guide for the remaining traveling distance to the destination on the guidance route is performed (step A4).

If it is determined that the display setting of the remaining mileage guidance is to be performed, then the interval of the remaining mileage guidance is set (step A5). In this case, the interval to be set is, for example, “1 km”, “5 km”, “10 km”
It shall be selected from five types of "50 km" and "100 km".

When the interval of the remaining mileage guidance is selected and set in this way, a plurality of guidance routes are calculated based on the departure point and the destination point input in step A2 and the search conditions input in step A3. The one that has the shortest travel distance or the estimated travel time for all the trips is calculated as a search result (step A6).

Then, the map data in the range including the calculated guidance route is called from the CD block 8 and transmitted to the graphic controller 19, and the guidance with the point mark corresponding to the interval of the remaining mileage guidance set in step A5 is added. The route is expanded and stored in the video RAM 20 so as to be displayed separately from the other roads, and is displayed on the monitor block 9 (step A7). Thus, the guidance route setting process of FIG. 2 is completed.

If it is determined in step A4 that the display setting of the remaining travel distance guidance is not to be performed, the departure point and the destination point input and set in step A2 are used as they are.
A plurality of guidance routes are calculated based on the search conditions input and set in the step A3, and a route with the shortest travel distance or scheduled travel time for all the trips is calculated as a search result (step A8).

Then, map data in a range including the calculated guidance route is called from the CD block 8 and sent to the graphic controller 19, and the calculated guidance route is expanded and stored in the video RAM 20 so as to be displayed separately from other roads. Is displayed on the monitor block 9 above (step A
9) The guide route setting process of FIG. 2 is completed.

Next, referring to FIG. 3, it is assumed that the display setting of the remaining travel distance guidance is to be set in FIG.
13 will be described.

At the beginning, display data including map data is developed and stored in the video RAM 20 so that the guidance route to which the point mark corresponding to the interval of the remaining mileage guidance is added is displayed separately from other roads. It is displayed on the monitor block 9 (step B1).
Based on the latitude data and longitude data of the current position obtained from the block 2 and the data of the traveling direction, the own vehicle position mark is also displayed on the road position corresponding to the display data (step B2).

FIG. 4 shows an example of a map screen including a guide route displayed on the monitor block 9 at this time. As shown, the display screen displays many roads RD and a guidance route GR from the vehicle mark SC indicating the current position to the destination point FP.

Further, in this guidance route GR, for example, a point mark PM, PM,.
For example, it is displayed every 1 km on the map, and a plurality of point marks PM, PM,.
Is a voice guidance point mark VM using a black circle symbol,
VM and so on are displayed.

In the voice guidance point mark VM, a numerical value of the distance to the destination point FP such as "10 km" or "20 km" is displayed as the remaining travel distance guidance in addition to the above-mentioned black circle symbol. For example, in the figure, the fact that the vehicle mark SC is located at a point about 23 km to the destination point FP can be visually recognized in a short time.

While such display is being performed, it is determined whether or not an arbitrary point mark PM or voice guidance point mark VM on the guidance route GR is selected and designated by the cursor key and the predetermined key of the key block 6 ( Step B3) Only when it is determined that the selection has been made, at the predetermined position at the end of the screen of the monitor block 9, for example, the accurate remaining mileage in units of 1km is displayed as a display message, for example, "23km to the destination". (Step B4). In this case, only the remaining mileage number portion “23 km” in the display message is displayed in a color that is easily visible, for example, red, which is different from other character portions.

Thereafter, the current position displayed by the own vehicle mark SC passes over the position corresponding to the voice guidance point mark VM, irrespective of the presence or absence of the notification by the display message of the number of remaining mileage in step B4. It is determined whether or not it has been performed (step B5).

Here, if it is determined that the current position has not passed over the position of the mark VM, the process returns to the processing from step B1 again. The voice data is read from the ROM 11,
The number of remaining mileage is output as a voice message by the speaker unit 22 via the D / A conversion unit 10 and the amplifier 21 as a voice message, for example, as a loudspeaker such as "23 km to the destination" (step B6), and thereafter. The process returns to step B1.

In the first embodiment, at step A5 of the guidance route setting process in FIG. 2, the interval for performing the display setting of the remaining mileage guidance starting from the destination is set. Alternatively, instead of the destination point, a point mark for guiding the remaining mileage may be additionally displayed on the guidance route starting from the departure point or the current position point to the destination point.

Here, especially when the point of the current position is set as the starting point, the starting point moves on the guide route along with its own movement. At the point indicated by the voice guidance point mark VM in step B6.

In the first embodiment, a point mark is additionally displayed on the guidance route.
Instead, point symbols such as scales and distance numbers may be additionally displayed at regular intervals.

(Second Embodiment) Hereinafter, the present invention will be described with reference to a GPS.
A second embodiment in which the present invention is applied to an automobile navigation device using a computer will be described with reference to the drawings.

The circuit configuration of the entire apparatus is the same as that shown in FIG. 1, and the same parts are denoted by the same reference numerals and description thereof will be omitted.
Next, the operation of the above embodiment will be described.

FIG. 5 mainly shows the contents of processing by the CPU 13 when setting a guidance route after selecting the route guidance function. At first, a map including a road in an arbitrary area is first operated by a key operation of the key block 6. The data is called from the CD block 8 and transmitted to the graphic controller 19, developed and stored in the video RAM 20, and then displayed on the monitor block 9 (step C1).

While the map including the road is displayed on the monitor block 9 in this manner, the screen is scrolled appropriately,
Alternatively, the starting point and the destination point of the guidance route and the input are set by the key operation of the key block 6 while changing the displayed range by changing the scale (step C2). At this time, when the current position is set as the departure point, the input can be omitted.

Next, after inputting and setting search conditions such as the input of a waypoint and the priority of a toll road (step C).
3) A plurality of guidance routes are calculated on the basis of the input departure point and destination point and the respective search conditions, and the one that has the shortest travel distance or scheduled travel time for all the trips is calculated as a search result (step C4). ).

Then, the map data in the range including the calculated guide route is called from the CD block 8 and transmitted to the graphic controller 19, and the guide route is expanded and stored in the video RAM 20 so as to be displayed separately from other roads. Is displayed on the monitor block 9 (step C5).

After the guidance route is displayed on the monitor block 9 in this way, it is determined whether or not the guidance by voice message is to be set based on the presence or absence of a predetermined key operation (step C6).

If it is determined that guidance by voice message is not to be set, the guidance route setting process of FIG. 5 is terminated at that time. If it is determined that guidance by voice message is to be set, Further, an input of a desired remaining mileage value by operating the numerical keys of the key block 6 is received (step C7).

When the input is made, the distance to the destination on the guidance route calculated in the step C4 is determined based on the input remaining travel distance value at a point corresponding to the input remaining travel distance value. The calculation is performed (step C8), and the display data of the point mark corresponding to the calculated point is superimposed and stored in the video RAM 20 and is displayed on the monitor block 9 (step C9). finish.

Next, referring to FIG. 6, it is calculated assuming that display setting of the remaining travel distance guidance is to be set in FIG.
13 will be described.

At the beginning, data of the latitude, longitude, height, time, and traveling direction of the current location are acquired from the GPS block 2 as information on the position of the vehicle (step D1). The map data is read from the map CD-ROM 7 of the CD block 8 in accordance with the latitude and longitude data and the scale information set at that time, and is displayed on the video RAM 20 by the graphic controller 19 as display data including the own vehicle position. The data is developed and stored, and displayed and output on the monitor block 9 (step D2). On this occasion,
In the case where the guidance by voice message is set in the processing of FIG. 5, a point mark is displayed at the position of the remaining travel distance arbitrarily input in addition to the map data.

FIG. 7 shows an example of a map screen including a guide route displayed on the monitor block 9 at this time. As shown, the display screen displays many roads RD and a guidance route GR from the vehicle mark SC indicating the current position to the destination point FP.

Further, in this guidance route GR, the position corresponding to the arbitrarily input remaining running distance is displayed as, for example, a point mark PT using a black circle symbol. The travel distance value is specifically displayed as, for example, “15 km”.

In such a display state, it is determined whether or not the current position displayed by the own vehicle mark SC has passed a position corresponding to the point mark PT (step D3).

Here, if it is determined that the current position does not pass over the position of the mark PT, then the current position displayed by the own vehicle mark SC has reached a position corresponding to the destination point FP. That is, it is determined whether or not the execution of the route guidance function has been completed (step D).
5) If it is determined that the current position has not reached the position of the destination point FP, the process returns to step D1 again.

However, when it is determined that the current position has passed over the position of the point mark PT in step D3, the necessary voice data is read from the ROM 11 and the D / A is executed. Conversion unit 10, amplifier 21
The remaining travel distance set by the speaker unit 22 via the voice message is used as a voice message, for example,
5 km "and output a loudspeaker message (step D4), and then return to the processing from step D1.

Thereafter, when it is determined in step D5 that the current position has reached the position of the destination point FP, it is determined that the execution of the route guidance function has been completed, and the processing of FIG. 6 is completed.

In the second embodiment, in step C8 of the guidance route setting process in FIG. 5, a point corresponding to the remaining mileage value in which the distance to the destination is input on the guidance route is calculated. Even if such calculation is not performed, when the route guidance function of FIG. 6 is executed, for example, the actually traveled distance is sequentially subtracted from the travel distance of the entire route of the guidance route, and the difference is calculated. May be determined to have passed the position of the point corresponding to the remaining mileage value at the time when matches the remaining mileage value input.

In this case, since the point on the guide route corresponding to the input remaining travel distance value cannot be obtained by calculation, the point mark on the guide route GR as shown in FIG. No PT is displayed.

In step D4 of FIG. 6, when it is determined that the current position has passed the point on the guidance route corresponding to the input remaining travel distance value, a voice message is input using the input remaining travel distance number. However, the present invention is not limited to this, and one end of the monitor block 9 may be notified as a display message in characters, or a mere alarm sound may be emitted.

The number of traveling distances from the starting point may be input and set instead of the number of remaining traveling distances. Although the method described in the first and second embodiments has been described as being fixedly stored in the ROM 11 as a program to be executed by the navigation device, the present invention is not limited to this. 8 may be stored as an operating system in a part of the map CD-ROM 7 mounted on the controller 8 and may be written in an electrically rewritable memory such as an EEPROM or a flash memory instead of the RAM 12, and then operated. Further, the medium on which the operation program is recorded is not limited to a CD-ROM, but may be written on another recording medium, for example, a magnetic disk (floppy disk, hard disk, etc.), an optical disk (DVD, data MD, etc.), a semiconductor memory, or the like. And apply it to various devices, or transmit it over a communication medium and It is possible and also not only the navigation system for a motor vehicle equipped assumed can be applied to a data processing apparatus such as a personal computer by mounting these various devices that.
In addition, the present invention can be variously modified and implemented without departing from the gist thereof.

[0067]

According to the first aspect of the present invention, it is possible to recognize at a glance the remaining distance from any point on the guidance route to the destination. According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the interval between the displayed point symbols can be variably set so that the user can easily see it, thereby further improving the usability. be able to.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, a notification is made at a point where a predetermined remaining distance to the destination is reached, so that an extra burden is imposed on the user. The arrival at the point can be notified without forcing.

According to the fourth aspect of the present invention, the notification is made at the point where the user has entered the predetermined remaining distance to the destination, so that the user can reach the point without imposing an extra burden. I can let you know.

According to the fifth aspect of the present invention, it is possible to easily visually recognize the position on the guidance route of the point where the user has entered the predetermined remaining distance to the destination point. According to the invention described in claim 6, the remaining distance from an arbitrary point on the guidance route to the destination can be recognized at a glance. According to the invention described in claim 7, the remaining distance from an arbitrary point on the guidance route to the destination can be recognized at a glance.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents of the operation according to the embodiment;

FIG. 3 is a flowchart showing processing contents of the operation according to the embodiment;

FIG. 4 is an exemplary view showing a display screen according to the embodiment.

FIG. 5 is a flowchart showing processing contents of an operation according to the second embodiment of the present invention.

FIG. 6 is a flowchart showing the processing content of the operation according to the embodiment;

FIG. 7 is a view exemplifying a display screen according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... GPS antenna 2 ... GPS block 3 ... Graphic block 4 ... FM antenna 5 ... Beacon antenna 6 ... Key block 7 ... Map CD-ROM 8 ... CD block 9 ... Monitor block 10 ... D / A conversion part 11 ... ROM 12 ... RAM 13 CPU 14 FM multiplex receiver 15 Beacon receiver 16 Traffic information controller 17 Timer section 18 CPU peripheral circuit gate array (G / A) 19 Graphic controller 20 Video RAM 21 Amplifier 22 Speaker unit FP… Destination point GR… Guidance route PM… Point mark PT… Point mark RD… Road SC… Own car mark VM… Voice guidance point mark

Claims (7)

[Claims] 1. Map storage means for storing map data; designation means for designating a starting point and a destination point in the map data; and designation using the map data stored in the map storage means. A route calculation means for calculating a route from the departure point to the destination point, and display means for displaying the route obtained by the route calculation means with point symbols at regular intervals. Display device. 2. The map display device according to claim 1, wherein said display means further comprises setting means for variably setting a fixed interval of point symbols displayed on the route. 3. The apparatus further comprises: positioning means for positioning the current position of the terminal; and notifying means for notifying when the current position obtained by the positioning means coincides with the position of the point symbol. 3. The map display device according to claim 1, wherein 4. A map storage means for storing map data, a designation means for designating a departure point and a destination point in the map data, and a designation using the map data stored in the map storage means. Route calculation means for calculating a route from the departure point to the destination point, positioning means for positioning the current position of the user, input means for inputting arbitrary distance data, and the current position obtained by the positioning means A map display device comprising: a notifying unit for notifying a position on a route according to the distance data obtained by the input unit when the position matches the position data. 5. A map storage means for storing map data, a designating means for designating a departure point and a destination point in the map data, and a designation using the map data stored in the map storage means. Route calculation means for calculating a route from the departure point to the destination point, input means for inputting arbitrary distance data, and adding a point symbol to a position on the route corresponding to the distance data obtained by the input means. A map display device comprising: a display unit for displaying a map. 6. A map display method applied to a map display device for reading map data from a storage medium and expanding and displaying the map data, wherein a starting point and a destination point are designated, and a route from the designated starting point to the destination point is designated. A map display method comprising reading and calculating the map data from a medium storing the map data, and displaying the obtained route with point symbols at regular intervals. 7. A recording medium on which a program for a map display device for expanding and displaying map data is recorded, wherein the map display device has a fixed route on a route from a departure point to a destination point calculated based on the map data. A recording medium having recorded thereon a program for displaying a point symbol of an interval.