JP3147598B2 - Navigation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation apparatus for providing guidance to a destination through a preset route, and more particularly to a map which is divided into a plurality of areas, and an area number and area for each area. The present invention relates to a navigation device having a function of setting point position data by operating or communicating input of coordinates of a representative point.

[0002]

2. Description of the Related Art Navigation devices provide route guidance so that they can visit a destination for the first time by car. In recent years, performance and functions such as navigation accuracy, operability, and visibility have been improved. Technology development for this is being actively carried out, and various types are proposed. This navigation device has a display screen used when setting a route and a display screen which is opened automatically at the time of guidance and guidance or in response to a driver's request. The display screen after the start of the guidance includes a section diagram that guides a wide area of several sections including the section currently being driven in at least the entire route including a plurality of sections in which a route is set, and an intersection for performing guidance at an intersection. It has figures etc. It also provides information such as the remaining distance and name, right and left turns, etc. regarding intersections that should be turned so that the route can be definitely traveled, and also teaches features so that the route in the middle of traveling can be confirmed, and In addition, there are those which provide not only display but also voice guidance.

In such a navigation device,
In order to set a route, it is necessary to input a departure point and a destination, and to display a map required by a driver, it is necessary to input a current position and a point of a passing point. For example, in the case of setting a route, when the input departure point and destination are determined, a route search process is performed from the road information data around the departure point and the destination and between them, and an optimum route is set from a plurality of routes. Is done. For example, target registration positions such as a departure place and a destination are classified into genres such as sightseeing, parking lots, restaurants, etc. In addition to inputting, a method of displaying a menu and selecting sequentially from the menu and inputting, having node data, connecting this node data to define a road network, inputting the position by the coordinate values of east longitude and north latitude And a method of inputting a telephone number have been proposed.

Conventionally, as a method of inputting a point such as a current position, a destination, and a passing point, a necessary map screen is displayed by inputting a map in a scale starting from a national map or by inputting from a point index. I was letting it. As an example of this type of apparatus, a telephone number input method is disclosed in Japanese Patent Application Laid-Open No. Hei 2-187898.
No. 0 discloses a genre or code number input method.

[0005]

By the way, in the conventional destination input method, it is not possible to set the destination that one wants to go to. For example, if you are trying to set an acquaintance's home as your destination,
In the telephone number input method, the telephone number of the acquaintance's house must be registered. However, acquaintances' homes are often not registered. Therefore, where the area, including a friend's house (city outside the stations <br/> number) match, has issued a map there as a representative point. Of course, the displayed map is of a wide range, and it has been difficult to specify an acquaintance's house on the map. To cope with this, the telephone number of the acquaintance's house may be registered, but the data amount becomes large and the cost becomes very high.

In the code number input method, the destination can be set accurately. However, in order to be able to set an unspecified number of destinations such as an acquaintance's house, for example, an unspecified number of destinations must be set. , Code number. When the data code is input, data for converting the code number to the point location information is required, and the user bears the cost of converting the data and the cost of the device required to store the data. Must. Further, there is a problem in that the number of operations (designation) required to set the current location, a passing point, and the like increases to display a map required by the driver, which is troublesome. The purpose of the present invention is
It is an object of the present invention to provide a navigation device which enables a driver to display necessary map information using an existing map without requiring a troublesome operation. It is another object of the present invention to provide a navigation device that simplifies setting of points such as a current position, a destination, and a passing point.

[0007]

According to one aspect of the present invention, there is provided a navigation apparatus for acquiring necessary map information by using a communication line with an external information source. Information storage means for storing map data, means for transmitting information about a point to an information source, means for receiving map information including range information corresponding to the information about the transmitted point from the information source, and received map information And display processing means for reading map data from the information storage means based on the information and displaying a map including the point. The invention according to claim 2 is characterized in that the display processing means displays the received range information on a map including a point. Further, the invention according to claim 3 is a navigation device for acquiring necessary map information by using a communication line with an external information source, wherein the information storage means for storing map data, and information relating to a destination. Means for transmitting to the information source, means for receiving map information and photograph data corresponding to the information on the transmitted destination from the information source, and reading map data from the information storage means based on the received map information, A display processing means for displaying a map including the destination and displaying the received photographic data is provided.

[0008]

According to the first aspect of the present invention, map information including range information corresponding to information relating to a point transmitted to an information source is received from an information source, and the information storage means receives the map information based on the map information. By reading the map data and displaying the map including the points, it is possible to display a map including the desired point on a map of an appropriate scale, and further,
The cost can be reduced because it can be shared among many models. According to the invention of claim 3, map information and photograph data corresponding to the information on the destination transmitted to the information source are received from the information source, and the map data is read from the information storage means based on the map information, By displaying the map including the destination and displaying the received photo data, the position of the destination can be confirmed from the map including the destination, and the destination itself can be confirmed from the photograph corresponding to the destination. Therefore, it is possible to reliably reach the destination. In addition, since it is possible to eliminate the destination data provided in the navigation device, the data storage space,
A memory space for temporarily storing data inside the arithmetic unit is not required, and the size can be reduced. In addition, the cost is low because existing map information is used. In addition, since the information center is used, there is no need to search by yourself, it is released from the frustration of searching, the time required for searching can be shortened, and by having an interface corresponding to the coordinates of the area number or the representative point of the area, for example In addition, it is possible to make common among many models and to reduce the cost. Furthermore,
In the case of the communication input, the input operation becomes unnecessary, and the setting is simplified.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a system configuration of a navigation device having a point setting function based on absolute coordinates. The navigation device includes an input / output unit 1 for inputting and outputting information relating to route guidance, a current position detection unit 2 for detecting information relating to the current position of the vehicle, navigation data required for calculating a route, and display guidance required for guidance. An information storage device 3 in which data and the like are recorded; a data communication unit 4 for transmitting and receiving navigation data to and from an information source such as an information center and an electronic organizer; and a route search process and a display guidance process necessary for route guidance are executed. And an arithmetic unit 5 for controlling the entire system.

The input / output unit 1 instructs the arithmetic unit 5 to perform a navigation process according to a user's intention so that a destination can be input and guidance information can be displayed by voice and / or on a screen when necessary. In addition, it has a function of printing out processed data, data of data communication, and the like, outputting sound from a speaker, and displaying and outputting on a display. As means for realizing the function, the input unit records a destination on a touch switch 11, a voice recognition device 12, an IC card or a magnetic card for inputting a destination by a telephone number or coordinates, or requesting route guidance. The output unit is processed by a display 14 for displaying input data on a screen, a driver's request or automatically displaying route guidance on a screen, and a processing unit 5. A printer 15 prints out data and data stored in the information storage device 3 and communication data sent from an information center or the like, and a speaker 16 outputs route guidance by voice.

Further, a large amount of route guidance information is accumulated,
Data transmission / reception with an external information center provided at the request of the user, and the user storing destination information in advance in an information storage medium (data storage means) such as an electronic organizer, an IC card, and the like, and using this information, point coordinates And a data communication unit 4 for transmitting and receiving data for inputting the data. Here, the data transmission / reception unit of the data communication unit 4 is configured by various communication means according to system specifications, and in this example, includes a radio wave transmission unit, a radio wave reception unit, a wired communication reception unit, and an optical communication reception unit.

The display 14 is constituted by a color CRT or a color liquid crystal display, and all necessary for navigation, such as a route setting screen, a section map screen, an intersection map screen based on map data and guidance data processed by the arithmetic unit 5. Is displayed in color, and buttons for setting route guidance, performing guidance during route guidance, and performing screen switching operations are displayed on this screen. In particular, the passing intersection information such as the passing intersection name is displayed in color in a pop-up on the section map screen at any time.

The display 14 is provided in an instrument panel near the driver's seat. The driver can check the current position of his / her vehicle by looking at the section map and obtain information on a route from now on. it can. The display 14 is provided with a touch switch 11 corresponding to the display of the function button, and is configured to execute the above-described operation based on a signal input by touching the button. The input signal generating means constituted by such buttons and touch switches constitutes an input section, but a detailed description thereof will be omitted here.

The voice recognition device 12 constitutes an input signal generating means, and generates a signal to be processed by the arithmetic unit 5 after recognizing coordinate information input by a user through the microphone 12a. The current position detector 2 includes a GPS receiver 21 and a beacon receiver 22 using a satellite navigation system (GPS), for example, a data transmitting and receiving device 23 for receiving a GPS correction signal using a cellar phone or an FM multiplex signal, for example, geomagnetism. Absolute azimuth sensor 24 composed of a sensor or the like, relative azimuth sensor 25 composed of, for example, a wheel sensor or a steering sensor, distance sensor 26 for detecting the traveling distance from the rotation speed of the wheel, acceleration sensor 27
Consists of The information storage device 3 is a database in which all data such as map data, display guidance data, voice guidance data, and data for performing coordinate conversion from area numbers are recorded.

The arithmetic unit 5 includes a CPU 5 for executing arithmetic processing.
0, a first ROM 51 storing a program for performing processing such as route search, a display control required for route guidance, a voice output control required for voice guidance, and data necessary for the program, a searched route A RAM 52 for temporarily storing guidance information and data being processed;
A second ROM 53 storing display information data necessary for route guidance and map display, an image memory 54 storing image data used for screen display on a display, a CPU
The image processor 55 extracts image data from the image memory based on a display control signal from the CPU, performs image processing and outputs the image data to a display, a voice read from the information storage device 3 based on a voice output control signal from the CPU, a phrase, An audio processor 56 that synthesizes a single sentence, sound, etc., converts it into an analog signal, and outputs it to a speaker;
Configuration from the sensor input interface 58, clock 59 for entering date and time into internal die UGG <br/> information for taking a sensor signal communication interface 57 and a current position detecting unit for exchanging input and output data by communication Have been.

The system is configured so that the driver can select either route display or voice output for route guidance. Further, the present system calculates an estimated position based on various sensor signals from the current position detection unit and GPS data, and determines a position on the road by correlating the estimated position with the road on the map and the GPS data. Find the current position. Here, if the correlation with the road data shown on the map is poor, the current position is not displayed on the road shown on the map. Further, the present system has a function of illuminating the current position with a route to a destination and determining whether or not the vehicle is approaching a predetermined guide point with respect to the position on the lane of the vehicle. That is, by the above function, the timing of a predetermined distance before the intersection on the guide route, the automatic voice output after the intersection is determined, and the output of the intersection information such as the name of the passing intersection are determined. A guidance command is issued to the image processor and the audio processor based on the result of the determination. Further, when the request signal is input, it instructs the voice processor to provide voice guidance of the current location.

Next, a point setting function based on area numbers or coordinates of representative points of areas according to the present invention will be described. As a method for acquiring the area number of the destination, a storage device such as an atlas, an information center, and an electronic organizer can be used. The acquired area number or the coordinates of the representative point of the area is input to a coordinate conversion device that converts the area number into coordinates by an operation input using a screen or voice, or a communication input using radio wave communication, wired communication, or optical communication.

The coordinate conversion device is realized by software processing of the calculation unit 5, and acquires a conversion table or coordinates of a representative point of an area by calculation from the input area number and displays the coordinates on a map on a display. . As the point display method, one of display of a block representative point, display of a block area, and display combining a block representative point and a block area is selected.

FIG. 2 shows a system configuration for setting point coordinates from area numbers by screen input or voice input.
The atlas is given a unique number (hereinafter, referred to as an area number) for each area drawn on the map, for example, each section surrounded by vertical and horizontal lines. When a destination point is set, it is specified which area of the atlas the destination belongs to, such as a telephone number (TEL), name, destination address, location, and the area number is extracted. For example, TEL number,
Alternatively, a list in which names, area numbers, and page numbers correspond to each other may be included in an atlas as an appendix.

When the representative point coordinates for each area are determined in advance, the representative point coordinates of the area including the destination are extracted. When the extracted area number or the coordinates of the representative point of the area (hereinafter referred to as the area number or the like) is input on the screen or by voice, the coordinate conversion device outputs a coordinate conversion table for the area number or a coordinate conversion table for the representative point coordinates of the area. The coordinate data is obtained by calculation, and a display process is executed using the coordinate data and the map data. A map including the destination is displayed on the display of the input / output unit.
Is displayed in one of the forms shown in FIG. Here, the coordinate conversion device is configured by the calculation unit and the information storage device shown in FIG.

FIG. 3 shows a system configuration for setting area by inputting area information sent from the information center in response to a user inquiry. The information center is usually installed as a fixed station and has a function of storing data necessary for navigation and providing necessary data in response to a request from a user. The user sends destination information such as a telephone number, a name, an address, and a location to the information center by voice telephone or data using radio wave communication. The information center provides the requested area number or the coordinates of the representative point of the area and the size of the area by voice or data by radio communication, and the user inputs the area number or the like by voice or screen. Alternatively, when the navigation device has a function of automatically setting point coordinates by communication, data such as an area number transmitted from the information center is received (automatic input).
I do. Based on the area information data input by these input methods, coordinates are calculated by the position of the area and the size of the section selected based on the lower left coordinates of the atlas to which the area belongs, and the display processing is performed from the result. Go to show the location. In addition, the information center may send detailed map data around the point or photograph data from the information center, and may be used as reference data for reaching the destination when the vehicle arrives near the destination.

FIG. 4 shows an example in which the destination data is inputted, and data such as an area number is converted from the digitized map data stored in the electronic organizer. In the following, a system configuration for automatically inputting data by sending it to a navigation device using optical communication is shown. The electronic notebook is mainly composed of an input section for destination data, data such as an area number corresponding to the destination data, a storage section for storing digitized map data, and an area number based on the input destination data. And a communication unit for transmitting data such as the extracted area number.

The communication section connects the electronic organizer shown in FIG. 4A and the navigation device with a communication cable and transmits data such as an area number, or the light emitting section is provided on the electronic organizer side shown in FIG. A light receiving unit is arranged on the navigation device side, and data such as an area number is converted into optical data and transmitted. When setting the point coordinates of the destination, when destination data is input to the electronic organizer, data such as an area number is output to the navigation device. The navigation device acquires the point coordinates from the input data such as the area number,
A display process based on the detailed map data around the point or the photograph data sent from the electronic organizer when the vehicle arrives around the destination is performed to display a block representative point or a block area representing the point on a map or a photograph.

Next, operation input of an area number will be described. FIG. 5 shows a specific example of extracting an area number when a map is divided into arbitrary grid areas. FIG. 6 shows an example of the layout of the area number input screen, which is a basic screen provided with function keys required for inputting an area number. FIG.
In the embodiment shown in (a), the map book number (map number) divided into volumes for each region, the page number indicating which page of the specified map book is located, and the section of the specified page The area number is made unique by three pieces of information (hereinafter, referred to as an area number) of a section number indicating whether there is a section number.

The unique area number input screen 6 is provided with function keys for inputting at least a map number, a page, and a section number. On the screen, a function key including a map number key 61, a page number key 62 and a section number key 63 for operating input, a ten key 64 for inputting destination data, an erase key 65 for deleting input data, completion of input And a display 67 for displaying input data for each selected function key. Although a message display at the time of an input operation is also provided, it is omitted here.

When a map number, a page number, and a section number are sequentially input on the screen 6 and the completion key 66 is pressed, destination data is set, and is displayed on the display 14 after being subjected to display processing together with the map data. In this example, the description has been made on the assumption that the map number, the page, and the section number are correctly input in the order, but the input may be performed in any other order. When the atlas is composed of one book, or when the atlas is limited to one book by some means, as shown in FIG. Settings can also be made.

FIG. 7 shows a specific example of dividing a national map into grid areas and extracting section numbers. FIG. 8 shows an example of the configuration of a divided level map and an example of the layout of an area number input screen. In this embodiment, the nationwide map is divided into 8 × 8 blocks, one divided block is further divided into 8 × 8 blocks, and the area number is characterized by a plurality of divided blocks (sections). Therefore, the area number is represented by a sequence of digits equal to the number of divided blocks, that is, a vertical sequence and a horizontal sequence. In the map of the fourth division level shown in FIG. 8, the division positions on the map 9 divided into four, that is, the horizontal and vertical numerical values are arranged in the division order, and the numerical sequence is represented in the horizontal and vertical.

For example, the horizontal sequence "6356" and the vertical sequence "4"
575 ”, the nationwide map (first division) is present in a block (6 × 4 blocks) of horizontal“ 6 ”and vertical“ 4 ”. In the divided map (second division), the map exists in 3 × 5 blocks. In the map obtained by dividing the 3 × 5 block (third division), the map exists in 5 × 7 blocks, and the map obtained by dividing the 5 × 7 block ( In the fourth division, it means that it exists in a 6 × 5 block.

When the national map is divided into four parts as described above, the area numbers can be extracted from the map book 9 shown in FIG. 8 created for each block of interest in the national map. From the atlas 9, the number of the section including the destination (the filled section in the figure) is indicated by a circled “635”
6 "and a vertical value of" 4575 "are input on the screen. The basic configuration of the input screen 7 is a function key including a horizontal key 71 and a vertical key 72 for inputting vertical and horizontal numerical values written on a map,
Block number display section 7 for displaying the input horizontal number and vertical number
3 and the other configuration is the same as that shown in FIG. The input operation on this screen is completed by inputting the vertical and horizontal section numbers while looking at the atlas, and pressing the completion key.

FIG. 9 is a diagram showing an example of a layout of a screen for inputting an atlas in which longitude and latitude are indicated and a section divided by longitude and latitude. The atlas 10 describes the east longitude and the north latitude . For example, when a destination is extracted in a rectangular area, the absolute coordinates (longitude and latitude) of four points in a rectangular coordinate system are used. Here, the destination area is specified by inputting the diagonal coordinates of the rectangle from the input screen.

The basic configuration of the input screen 8 is a function key consisting of a degree key 81, a minute key 82 and a second key 83 for inputting values of east longitude and north latitude written on a map, and two input diagonal coordinates. A longitude / latitude display unit 84 for displaying points at diagonal positions of the rectangular drawing 85 is provided, and the other configuration is the same as that shown in FIG. The input operation on this screen is completed by inputting the values of the east longitude and the north latitude while looking at the atlas, confirming the input coordinates displayed on the screen, and then pressing the completion key.

Next, the process of setting point coordinate data will be described with reference to FIG. When input data as point coordinate information is obtained by an operation input using a screen or voice, or a communication input through radio wave communication or optical communication, the point coordinate value is converted in a predetermined unit, for example, in units of 1/128 seconds. The converted input data is stored as point coordinate data.
Then, a destination point display process is performed to display the point on the map.

Next, an input process using communication data will be described. FIG. 10 shows a flow of processing of communication reception and processing of received data of the navigation system. When the communication receiving unit receives one or more pieces of communication data containing the same area number (S1), first, an error check is performed to determine whether or not the communication data is correct (S2). If it is legitimate communication data, the completion of reception is notified to the input processing unit (S
3) The area number is stored based on the communication data. From the input area number, a representative point of a block including a destination and / or a block area is displayed.
On the other hand, if the communication data is not legitimate communication data, a reception error is notified to the input processing unit (S4), and a message indicating the reception error is displayed.

Next, a specific example of converting coordinates from area numbers will be described. FIG. 11 shows the flow of processing when the image is divided into an arbitrary grid area. FIG. 12 shows the data structure. First, the data structure of the area number will be described.
In 2, the map number data is composed of a map number and an address at which the map data is stored. The map data is composed of the number of pages of the atlas specified by the map number and the address where the section data of each page is stored. The section data is composed of data such as the latitude and longitude at the lower left of the page of the section specified in the atlas, the section unit in each direction of the latitude and longitude, the minimum (Min) section number, the number of sections, and the like.

Based on such a data structure, coordinate conversion is performed from the area number. That is, in FIG.
When the area number input by input means such as screen input or communication input is obtained (S10), the corresponding map data is obtained from the map number part of the map number data and the area number (S11). Next, the corresponding section data is detected from the page number portion of the map data and the area number (S12). Further, the representative point coordinate data corresponding to the section number portion of the section data and the area number is calculated (S1).
3). FIG. 13 shows the flow of processing when the national map is uniquely divided into lattice areas. FIG. 14 shows the data structure. In this example, a description will be given of a case where a plurality of divisions are performed in accordance with the four division method shown in FIG.

First, the data structure of the area number will be described. In FIG. 14, the first divided data is divided into the reference points of the map in the lower left latitude and longitude, the east longitude and the north latitude, and the second division data. The related data is composed of the number of data and the address where the data is stored. The second divided data is provided for each area divided by the first division, and has a data structure including a number of the second divided area, division units and division numbers in the east longitude and north latitude directions, and data relating to the third division. And the address where the data is stored. Similarly, data after the third division is configured.

Based on such a data structure, coordinate conversion is performed from the area number. That is, in FIG.
When the area number input by the input means is obtained (S20), the first divided area data is obtained (S2).
1) The number of the first divided area is calculated (S22). The lower left east longitude and north latitude of the calculated first divided area are calculated (S23). Then, the east longitude and the north latitude at the lower left of the divided area are calculated from the number of the second divided area (S24). This is the east longitude of the lower left to the division level specified by the area number,
The calculation of the north latitude is repeated (S24), and the obtained lower left east longitude and north latitude are stored as the lower left coordinates of the area (S25).

Next, the processing when the area number is a coordinate will be described. FIG. 15 shows the flow of processing when the area number is a coordinate. When the input coordinates are obtained (S30),
In order to align the input coordinates, the input coordinates are converted into, for example, 1/128 second units (S31), and the converted values are stored (S3).
2). In the embodiment of the present invention, the case where the destination number is set by inputting the area number has been described. However, the present invention is also applicable to a case where a point such as a current position or a passing point is set. By adopting such a system configuration, the present invention can be applied to setting of a point such as a current position or a passing point.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a system configuration of a navigation device according to the present invention.

FIG. 2 is a diagram showing a system configuration for setting an area number or coordinates of a representative point of an area by screen input or voice input;

FIG. 3 is a diagram showing a system configuration for performing operation input or automatic input based on area number information sent from an information center in response to a user inquiry;

FIG. 4 shows a system configuration in which, by inputting destination data, data such as an area number stored in an electronic organizer is sent to a navigation device and automatically set.
4A is a system configuration diagram using wired communication, and FIG. 4B is a system configuration diagram using optical communication.

FIG. 5 is a diagram illustrating area numbers when a map is divided into arbitrary grid areas.

6A and 6B show layouts of an input screen when a map is divided into arbitrary grid areas. FIG. 6A shows a case where an atlas is divided into volumes, and FIG. 6B shows a case where an atlas is one. 3 is a screen configuration diagram of FIG.

FIG. 7 is a diagram illustrating area numbers when a national map is divided into grid areas.

FIG. 8 is a diagram illustrating an example of a layout of a map at a fourth division level and an input screen.

FIG. 9 is a diagram showing an example of a layout of an atlas and an input screen when a map is divided into east longitude and north latitude.

FIG. 10 is a flowchart of an input process using communication data.

FIG. 11 is a flowchart of an area number → coordinate conversion process when an area is divided into an arbitrary grid area.

FIG. 12 is a diagram showing an example of a data structure used for area number → coordinate conversion when divided into an arbitrary grid area.

FIG. 13 is a flowchart of an area number → coordinate conversion process when a nationwide map is uniquely divided into lattice areas.

FIG. 14 is a diagram showing an example of a data structure used for area number → coordinate conversion when a nationwide map is uniquely divided into grid areas.

FIG. 15 is a flowchart of an area number → coordinate conversion process when the area number is a coordinate.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Input-output part, 2 ... Current position detection part, 3 ... Information storage device, 4 ... Data communication part, 5 ... Operation part, 6-8 ... Input screen, 9, 10 ... Atlas

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-291522 (JP, A) JP-A-64-33700 (JP, A) JP-A-2-79200 (JP, A) JP-A-6-33 208698 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G08G 1/0969 G01C 21/00 G09B 29/10

Claims (3)

(57) [Claims] 1. A navigation device for acquiring necessary map information using a communication line with an external information source, an information storage means for storing map data, and transmitting information on a point to the information source. Means for receiving, from an information source, map information including range information corresponding to the transmitted information on the point, reading map data from the information storage means based on the received map information, And a display processing means for displaying the following. 2. The navigation device according to claim 1, wherein the display processing means displays the received range information on a map including the point. 3. A navigation device for acquiring necessary map information using a communication line with an external information source, comprising: an information storage means for storing map data; and information on a destination as an information source. Means for transmitting, map information and photograph data corresponding to the transmitted information on the destination from an information source, and reading the map data from the information storage means based on the received map information, including the destination. Display processing means for displaying a map to be displayed and displaying received photo data.