JP3529930B2 - Navigation terminal, additional information display method for navigation terminal, and navigation data supplement system - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a navigation end.
The present invention relates to a supplementary information display method for a terminal and a navigation terminal, and a navigation data supplement system.

[0002]

2. Description of the Related Art Conventionally, map data read from an information medium such as a CD-ROM is displayed on a display device composed of a CRT or the like, and a map is displayed according to a direction instruction input from a user using a remote controller or the like. A map viewer that scrolls and displays is used for drive simulation and the like.

On the medium storing the map data, information about restaurants, amusements, tourist information, golf courses, etc. is often stored in the form of text, natural images, voice, etc. depending on the purpose. The desired information can be referred to.

However, since one medium covers a wide range of maps, there have been cases where essential information about an actually desired area cannot be referred to in great detail. In addition, I could not refer to the information after creating the medium, such as newly opened restaurants.

Even if only reference is made to map data, the data of roads and road constituents such as bridges and tunnels that change from moment to moment are
Since it is desirable to always have the latest information, in the concept of "supplying new information", for example, JP-A-7-929.
As described in Japanese Patent Laid-Open No. 06-06, there has been proposed a technique such as "a device for supplying road map correction data by an external storage medium (eg, cassette tape)".

[0006]

However, in the above-mentioned publicly known example, no consideration has been given to the latest information after the information medium itself for supplying new data is created.

Therefore, an object of the present invention is to be able to replenish the latest necessary detailed information via communication when referring to information of a specific area in a map data storage medium.

[0008]

In order to achieve the above object, in one representative invention of the present application, an input detecting means for detecting an input required by a user, a display means for displaying a map and the like, In a navigation terminal that displays a map and incidental information such as a restaurant on the map on the display unit based on a user input detected by the input detection unit, the navigation terminal is displayed.
Existing signals on a specific area on the map and multiple differences such as restaurants and museums existing on the displayed map.
Transmitting means for transmitting a signal to the navigation center to request supplementary information is information each type, the retrieved by the navigation center on the basis of a signal from the transmitting means, different of the plurality of peripheral circumstances of a particular area For each information type
Receiving means for receiving incidental information including position information and detailed information of the, and the plurality of different information received via the receiving means.
And storage means for additional information of each information Tsu type is stored,
A mark having a shape representing additional information for each of the plurality of different information types stored in the storage means is displayed on the map according to the position information of the additional information, and is displayed on the map. When one of the displayed marks is selected by the user, detailed information of incidental information corresponding to the selected mark is displayed on the map.

[0009]

[0010]

[0011]

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a navigation data supplement system 100 according to a first embodiment of the present invention, which is composed of a navigation system 101 and a supplement data providing system 102.

The navigation system 101 includes a storage medium 103 storing map data and incidental information of the map data, and an input detecting means 104 for detecting a user's input.
A display unit 105 for presenting the data read from the storage medium 103 to the user, a display content storage unit 106 for storing the display content of the display unit 105, and a storage medium based on a user input from the input detection unit 104. Control means 107 for reading data from 103, transmission means 109 for transmitting a supplementary data transmission request from the control means 107 to the supplementary data providing system 102, and receiving means 111 for receiving supplementary data from the supplementary data providing system 102,
An image to be displayed on the display unit 105 is generated from the replenishment data storage unit 110 that stores the replenishment data received by the reception unit 111 and the data read from the storage medium 103 and the replenishment data stored in the replenishment data storage unit 110. Image generation means 108 for

Further, the supplementary data providing system 102 is
Receiving means 112 for receiving a supplementary data transmission request from the navigation system 101, data retrieval means 115 for retrieving service data to be supplemented based on the supplementary data transmission request received by the receiving means 112, and retrieval by the data retrieval means 115. Data conversion means 113 for converting the service data into a format suitable for the navigation system 101, transmission means 114 for transmitting the supplementary data converted by the data conversion means 113 to the navigation system 101, and external network (World Wide Web etc.) 1
Network connection means 117 for connecting to 19,
Data creating means 11 for connecting to the network using the network connecting means 117, obtaining material data necessary for creating service data, and creating service data
8 and a data storage means 116 for storing the service data created by the data creation means 118.

Here, the service data is a material data group such as "text", "natural image", "voice", etc., which is necessary for the supplement data providing system 102 to create supplement data to be transmitted to the navigation system 101. Point to.
The material data group has a database structure that can be searched by latitude and longitude (hereinafter referred to as longitude and latitude) and information types (restaurant information, museum information, amusement information, golf course information, tourist information, etc.).

The storage medium 103 stores map data and incidental information of the stored map data (hereinafter referred to as map data incidental information). The map data incidental information is, for example, stored restaurant information, museum information, amusement information, golf course information, tourist information, etc., and text, natural images, voice, etc. can be used alone or as a means of expressing records. Used together. Further, screen numbers are given to the map data supplementary information providing screens that provide the map data supplementary information.

A CD-ROM is used as the recording medium 103, and a navigation study group format is used as the recording method of each data. In addition, this recording medium 103
Is given a disc ID for identifying the disc type.

The input detecting means 104 detects a user input by a remote controller, a keyboard, voice, or the like. Input from the user is selection of a menu presented on the display unit 105, virtual button display (hereinafter referred to as button), or scroll designation at the time of map data display.

The display means 105 displays a map, tourist information, etc.
Various information read from the D-ROM is presented to the user.

The display content storage means 106 is a display means 10.
5 stores information for specifying the screen being presented. If the map data is being presented, the center latitude and longitude information of the map, scale information, etc. are stored. If the map data accompanying information is being presented, the disk ID and the screen number being presented are stored.

The control means 107 stores the data corresponding to the user input from the input detection means 104 in the storage medium 103.
Alternatively, the display content is read from the supplemental data storage means 110, the display content is stored in the display content storage means 106, and the data for display is sent to the image generation means 108. Also, the control means 10
Reference numeral 7 is for requesting the supplementary data providing system 102 to transmit supplementary data relating to the display content being presented, based on the information for identifying the screen being presented stored in the display content storage means 106. , A supplementary data transmission request is transmitted.

The image generation means 108 creates a display screen based on the data from the control means 107.

The transmitting means 109 transmits a supplementary data transmission request of the control means 107 to the supplementary data providing system 102.

The receiving means 111 receives the supplementary data received from the supplementary data providing system 102 by the navigation system 101 as a result of the control means 107 transmitting the supplementary data transmission request to the supplementary data providing system 102.

The supplementary data storage means 110 is the receiving means 1
The received supplementary data from the supplementary data providing system 102 of 11 is stored.

The receiving means 112 of the supplementary data providing system 102 receives the supplementary data transmission request from the navigation system 101.

The data searching means 115 is a receiving means 112.
The service data is retrieved based on the received supplementary data transmission request received by.

The data conversion means 113 converts the service data retrieved by the data retrieval means 115 into a format suitable for transmission to the navigation system 101.

The transmitting means 114 is the data converting means 113.
Navigation system 101 using the converted supplementary data
Send to.

In the network connection means 117, the supplementary data providing system system 102 is used by the external network 1
Used to connect to 19.

The data creating means 118 collects various data on the external network 119 by using the network connecting means 117, and creates necessary data as service data.

The data storage means 116 stores the service data created by the data creation means 118.

Next, the data structure of the navigation CD-ROM will be described with reference to the CD-ROM data structure diagram of FIG.

Reference numeral 201 indicates map data, such as shapes of roads and buildings, longitude and latitude, “double circle”, “white triangle”, “black 3”.
It is composed of marks such as "corners". In addition, mark (double circle,
White triangles, black triangles, etc.) indicate that map data incidental information exists at the latitude and longitude marked.

Reference numerals 202 to 205 are examples of map data supplementary information. Reference numeral 202 is a model of a map data supplementary information providing screen, which defines a place where data such as “text”, “natural image”, and “voice” is set and various buttons.

Reference numeral 203 is material data to be fitted into the template explained in 202, and is "text", "natural image", "voice".
It is composed of data such as.

Reference numeral 204 denotes a related data index, which indicates a mark on the map data, the type of the map data supplementary information held by the mark, and the storage location. For example, "Restaurant A"
Has "text" and "natural image" data as detailed information, and the latitude and longitude on the map "East longitude 139.42, north latitude 3"
Corresponds to the "double circle" mark at the 5.39 "position.

A mark list 205 has a table structure showing the correspondence between each mark and the information type. For example, the CD-ROM for "Date in the metropolitan area!" Holds marks such as restaurants, museums, and amusements. By setting display (ON) / non-display (OFF) of the mark, the user can specify that only the mark to be referred to is presented on the display unit 105. Marks are set using a menu or the like.

When the user selects the mark, the control means 1
Reference numeral 07 refers to the related data index 204, and presents detailed information (map data supplementary information) held by the mark at the selected latitude and longitude position.

FIG. 3 shows the transition of the screen presented by the navigation system 101 on the display means 105. 3A shows a state in which the control unit 107 reads the map data 201 from the storage medium 103 and presents it on the display unit 105. The "double circle" mark on the map data indicates that the "restaurant" information is currently being referenced.

FIG. 3B shows a state in which the supplement data read from the supplement data storage unit 110 is superimposed on the map data 201 read from the storage medium 103 by the control unit 107 and presented on the display unit 105. Indicates.

In FIG. 3C, as a result of the user selecting the mark 303 on the map presented on the display means 105, the control means 107 displays on the display means 105 the map data supplementary information 304 held by the mark selected by the user. Is shown.

When the user is referring to the map data shown in FIG. 3 (a), the navigation system 101 displays the central latitude (l) of the map data being displayed on the display means 105.
x, ly) is transmitted to the supplementary data providing system 102 as a supplementary data transmission request.

The data retrieving means 115 reads "detailed information around latitude and longitude (lx, ly)" from the data storing means 116.
And the service data searched is searched for data conversion means 1
Send to 13.

The data conversion means 113 converts the service data retrieved by the data retrieval means 115 into a format suitable for the drawing system of the navigation system 101 and sends it to the navigation system 101 as supplementary data.

FIG. 4 shows an example of supplementary data for the navigation system 101. Reference numerals 401 and 402 are supplementary data of the material data 203 of the map data supplementary information and the related data index 204 described in FIG. The navigation system 101 newly receives “text”, “natural image”, and “voice” data as material data, and uses “Restaurant D”, “Restaurant E”, Museum “D”, as related data indexes. Data about the museum "F" has been received.

The control means 107 of the navigation system 101 stores the supplementary data received by the receiving means 111 in the supplementary data storage means 110.

In FIG. 3B, the navigation system 101 displays the supplementary data received from the supplementary data providing system 102 on the map of FIG.
2, 303 etc. are shown in a superimposed manner.

The control means 107 is a supplementary data storage means 1
The latitude / longitude information and the mark information are read from the related data index 402 stored in 10 and sent to the image generating means 108.

The image generating means 108 has the display means 10 in advance.
The designated marks 302 to 303 are superimposed on the position of the related data index latitude and longitude on the map data 201 presented in FIG.
The "double circle" and "white triangle" marks are newly presented.

FIG. 3C shows a screen displayed on the display unit 105 by the navigation system 101 as a result of the user selecting the mark 303.

When the user selects the mark 303, the control means 107 determines the latitude and longitude of the mark 303 from the related data index 204 read from the storage medium 103 or the related data index 402 stored in the supplementary data storage means 110. A mark having a matching latitude and longitude is searched, and detailed information (text, natural image, etc.) possessed by the mark is sent to the image generating means 108.

The image generation means 108 has detailed information (for example, text data 403) instructed by the control means 107.
Is displayed on the display means 105.

In the present embodiment, the central latitude and longitude (lx, ly) are used as the supplementary data transmission request, but the display range of the map data being presented on the display means 105 can be specified by sending the map scale. Therefore, the supplementary data providing system 102 can specify the data to be transmitted to the navigation system 101. Further, by additionally transmitting the information type being displayed, the supplementary data providing system 102
Can specify the type of information to be transmitted to the navigation system 101, and can further reduce the amount of data to be transmitted.

FIG. 5 is a block diagram of the navigation data supplement system 100 according to the second embodiment of the present invention.

In this embodiment, a keyword extracting means 501 and a disk list database 502 are newly added to the supplementary data providing system 102 shown in FIG. 1, and those equivalent to those shown in FIG. 1 are the same. The reference numerals are attached and the description thereof is omitted to avoid duplication.

The disk list database 502 is a map data supplementary information list of the storage medium 103 provided to the user, and has a table structure for identifying the screen content being displayed from the disk ID and the screen number. Table 1 below shows the disk list database.

[0058]

[Table 1]

The keyword extracting means 501 extracts a keyword of service data related to the currently displayed screen from the supplemental data transmission request from the navigation system 101 and the disk list database 502.

The data search means 115 searches the service data using the keywords extracted by the keyword extraction means 501.

The data creating means 118, based on the disk list database 502, the network connecting means 117.
Various data on the external network is collected by using and the necessary data is created as service data.

FIG. 6 is a diagram showing the screen transition of the map data accompanying information providing screen presented to the user by the navigation system 101 using the display means 105.

In FIG. 6A, the map data supplementary information 202-2 read by the control means 107 from the storage medium 103.
Of 05, for example, a state in which the “screen for listing restaurants” of screen number “1” is presented on the display means 105 is shown. On the screen, three store names of restaurants currently in Aoyama (place name) are listed, and the user can refer to detailed information by selecting a desired restaurant from restaurants A to C. I can. When the user selects a button displayed on the display means 105 by using a keypad, a remote controller or the like, the control means 107 presents a screen corresponding to the button.

For example, when the user presses the "START" button 6
When 01 is selected, the screen shifts to the "start screen" of the information providing screen, and when the "MENU" button 602 is selected, the menu screen for selecting "restaurant", "golf course" or the like is displayed. When the "END" button 603 is selected, the map data accompanying information providing screen is terminated.

In FIG. 6B, as a result of the navigation system 101 transmitting a supplementary data transmission request to the supplementary data providing system 102, the supplementary data providing system 10 is shown.
It is a figure which shows the mode that the supplementary data received from 2 was overlapped and presented on the screen of FIG.

The navigation system 101 requests the supplementary data transmission as the disk ID "date in the metropolitan area!"
The supplementary data providing system 102 that transmits the screen number “1” receives the supplementary data transmission request received by the receiving unit 112 from the keyword extracting unit 501.
Send to.

The keyword extracting means 501 refers to the disk list database 502 and extracts keywords for which service data should be searched. Keyword extraction means 5
01 is a "disk ID" as a supplementary data transmission request
When the “screen number” is acquired, the keyword is extracted with reference to the disk list database shown in Table 1.

The disk list database 502 is composed of "disk ID" and "screen number", and a keyword indicating the display content of the screen being displayed on the display means 113.
For example, if the disc ID is “date in metropolitan area!” And the screen number is “1”, the keyword is “Aoyama, restaurant”.
Is specified.

The data retrieving means 115 uses the keyword extracted by the keyword extracting means 501 to retrieve from the data storing means 116 the "text" related to the keyword,
Search for service data such as "natural image" and "voice".

In the supplementary data providing system 102, the service data retrieved by the data retrieval means 115 is converted into supplementary data by the data converting means 113, and is transmitted to the navigation system 101 by the transmitting means 114.

In the navigation system 101, the receiving means 111 receives the supplementary data from the supplementary data providing system 102 and stores it in the supplementary data storing means 110.

FIG. 4 shows an example of supplementary data transmitted from the supplementary data providing system 102 to the navigation system 101. Since the contents are the same as those in the first embodiment, FIG. 4 is applied.

The control means 107 determines, from the storage medium 103 and the supplementary data stored in the supplementary data storage means 110,
Template generation information 202 for creating an information provision screen,
Material data 203 and 401 and related data index 204
And 402 are read out and sent to the image generation means 108.

FIG. 6B shows a screen displayed on the display unit 105 by the navigation system 101 as a result of receiving the supplementary data. Navigation system 101
6 has received the information on "Restaurant D" and "Restaurant E" as supplementary data. Therefore, two pieces of restaurant information are added to the screen of FIG. 6A and displayed on the display unit 105 as FIG. 6B. Present.

FIG. 6C is the same as FIG.
The result of the user selecting “Restaurant E” is shown.

The image generation means 108 uses the template generation information 20.
The text data "Restaurant E" as the title, the text data "French restaurant dessert recommended!" Etc. are inserted as the title in the text embedded part of 2, and the picture of the menu example is embedded as the natural image data.

Further, for example, in FIG. 6C, when the user selects the “MAP” button 605, the control means 107 displays the latitude and longitude information included in the related data index 402 and the map data 201 as an image. Send to the generation means 108.

The image generating means 108 presents the acquired map including the vicinity of latitude and longitude on the display means 105, so that the user can refer to the map including the location of the restaurant.

Although the CD-ROM is used as the recording medium in the above-described embodiment, a DVD (Digital Video Di
An optical disk such as sc) may be used.

In the above-mentioned embodiment, the disc title is used as the disc ID.
ISRC (International Stan)
dardRecording Code) subcode (described in Q channel) or a disc label defined in the Navigation Study Group format may be used.

Further, in the above-described embodiment, the format conversion from service data to supplementary data is performed on the supplementary data providing system 102 side, but it may be performed on the navigation system 101 side.

In the above-described embodiment, the central latitude and longitude of the map data presented by the display means 105 is used as the latitude and longitude information transmitted from the navigation system 101 to the supplementary data providing system 102. G
When a PS (Global Positioning System) is provided, the latitude and longitude information acquired using GPS may be transmitted.

Further, in the above-mentioned embodiment, as the supplementary data transmitted from the supplementary data providing system 102 to the navigation system 101, data such as "text", "natural image", "voice", etc. is used. You may send building information (appearance, height, etc.) and update information such as new map data.

Further, in the above-mentioned embodiment, when the data search means 115 searches for data, parameters such as "longitude" and "information type" are used, but in addition to this, "date and time", "weather" , "User age / gender", "User preference" information and other parameters, "Recommended restaurants for Christmas", "Recommended amusement spots on sunny days", "Boutiques popular with 30s madam" You can narrow down the information as follows.

In the above-mentioned embodiment, the communication means between the navigation system 101 and the supplementary data providing system 102 is not particularly mentioned, but a wireless means such as a mobile phone, a radio or a satellite channel may be used. .

Further, in the above-mentioned embodiment, although only one supplementary data providing system is defined, when there are a plurality of supplementary data providing systems and the supplementary data provided respectively are biased, Navigation system 1
01 may include means for the user to select the supplementary data providing system 102 that suits his or her preference.

[0087]

As described above, according to the present invention, the latest and detailed information required by the user of the navigation system can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of a navigation data supplement system according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an example of a data structure of a CD-ROM used as a recording medium in the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing an example of screen transition of the navigation system in the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example of supplementary data for the navigation system in the first embodiment of the present invention.

FIG. 5 is a block diagram of a navigation data supplement system according to a second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an example of screen transition of a map data accompanying information providing screen in the second embodiment of the present invention.

[Explanation of symbols]

100 Navigation data supplement system 101 navigation system 102 Replenishment data providing system 103 storage medium 104 Input detection means 105 display means 107 control means 108 image generation means 109 transmission means 110 Replenishment data storage means 111 receiving means 112 Receiving means 113 Data conversion means 114 transmission means 115 Data Retrieval Means 116 data storage means 117 Network connection means 118 data creation means 119 External network 501 keyword extraction means 502 Disk List Database

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Yasushi Ito, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Multimedia system development headquarters (56) Reference JP-A-7-261661 (JP, A ) Japanese Patent Laid-Open No. 7-270171 (JP, A) Actual Development No. 5-79575 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29 / 00

Claims (5)

(57) [Claims] 1. An input detection means for detecting an input required by a user, a display means for displaying a map and the like, a map on the display means and a map on the map based on a user input detected by the input detection means. A navigation terminal for displaying incidental information such as a restaurant, wherein the navigation terminal is a latitude / longitude information signal of a specific area on the displayed map and a restaurant or museum existing on the displayed map. And a transmitting means for transmitting a signal requesting additional information for each of a plurality of different information types to the navigation center, and a vicinity of latitude and longitude of a specific area searched by the navigation center based on the signal from the transmitting means . Multiple differences
Receiving means for receiving additional information including position information and detailed information for each information type, and additional information for each of the plurality of different information types received via the receiving means is stored. And a storage means for displaying a mark of a shape representing supplementary information for each of the plurality of different information types stored in the storage means on the map according to the position information of the supplementary information, and A navigation terminal, characterized in that, when one of the displayed marks is selected by a user, detailed information of incidental information corresponding to the selected mark is displayed on the map. 2. An input detection means for detecting an input requested by a user, a display means for displaying a map and the like, a map on the display means and a map on the map based on a user input detected by the input detection means. A method of displaying incidental information of a navigation terminal for displaying incidental information of a restaurant or the like, comprising a latitude / longitude information signal of a specific area on a displayed map and a restaurant or museum existing on the displayed map. A plurality of different signals around the latitude and longitude of a specific area searched for by the navigation center based on the transmitted signal are transmitted to the navigation center by transmitting a signal requesting additional information for each of a plurality of different information types.
The additional information including the position information and detailed information for each information type is received, and a mark having a shape representing the received additional information for each of the different information types is displayed on the map according to the position information of the additional information. And when one of the marks displayed on the map is selected by the user, detailed information of incidental information corresponding to the selected mark is displayed on the map. How to display supplementary information. 3. A navigation data supplement system comprising a navigation terminal for displaying a map and incidental information such as a restaurant on the map on the display based on a user input detected by the input detecting means, and a navigation center. The navigation terminal requests a latitude / longitude information signal of a specific area on the displayed map and incidental information for each of a plurality of different information types such as restaurants and museums existing on the displayed map. Transmitting means for transmitting a signal to the navigation center, and a plurality of different locations around the latitude and longitude of the specific area searched by the navigation center based on the signal from the transmitting means .
A receiving unit that receives additional information including position information and detailed information for each information type; and a storage unit that stores the additional information for each of the plurality of different information types received via the receiving unit, A mark having a shape representing incidental information for each of the plurality of different information types stored in the storage means is displayed on the map according to the position information of the incidental information, and one of the marks displayed on the map is displayed. Once selected by the user,
Detailed information of incidental information corresponding to the selected mark is displayed on the map, and the navigation center stores the transmitting / receiving unit and the incidental information to be provided to the navigation terminal in association with the position information. And a search means for searching and extracting incidental information from the storage means in response to a request from the navigation terminal. 4. A navigation data supplement system comprising a navigation terminal and a navigation center, wherein the navigation terminal stores a map data and its accompanying information, a storage medium to which an identification ID is added, and a required input. The navigation center is provided to the transmission / reception means and the navigation terminal, the input detection means for detecting, the control means for reading the data from the storage medium, the display means for displaying the data read from the storage medium, and the transmission / reception means. Storage means for storing supplementary data of supplementary information in association with position information, a storage medium list database in which a list of contents of the storage medium is recorded, and keyword extraction means for extracting keywords of information required by the user, Supplement from keywords extracted by this keyword extraction means The navigation terminal includes, in the navigation center, the identification ID of the storage medium currently used for display and the specific information for specifying the display content displayed on the display means. Based on the identification ID and the specific information received from the navigation terminal, the navigation center searches the keywords in the storage medium list database by the keyword extraction means, extracts the keywords, and uses the extracted keywords to retrieve the data. The supplementary information is searched and extracted by the search means from the supplementary data, and the supplementary information extracted by the user is transmitted to the navigation terminal in a form including the location information. The navigation terminal receives the supplementary information received from the navigation center. Is displayed in addition to the data being displayed on the display means. Navigation data replenishment system. 5. A navigation data supplement system comprising a navigation terminal and a navigation center, wherein the navigation terminal stores map data and its accompanying information, and a storage medium to which an identification ID is given and a required input. The navigation center is provided to the transmission / reception means and the navigation terminal, the input detection means for detecting, the control means for reading the data from the storage medium, the display means for displaying the data read from the storage medium, and the transmission / reception means. Storage means for storing supplementary data of supplementary information in association with position information, a storage medium list database in which a list of contents of the storage medium is recorded, and keyword extraction means for extracting keywords of information required by the user, Supplement from keywords extracted by this keyword extraction means The navigation terminal includes, in the navigation center, the identification ID of the storage medium currently used for display and the specific information for specifying the display content displayed on the display means. Send,
In the navigation center, based on the identification ID and the specific information received from the navigation terminal, the keyword extraction unit refers to the contents of the storage medium list database to retrieve and extract the keyword, and uses the extracted keyword to retrieve the data by the data retrieval unit. Retrieves and extracts the supplementary information required by the user from the supplementary data, and transmits the supplementary information thus extracted to the navigation terminal in a form including the positional information.The navigation terminal receives the supplementary information received from the navigation center. When the user displays the supplementary information displayed in addition to the data being displayed on the display unit and selects and specifies the link function to the map, the map including the position of the selected supplementary information is displayed. A navigation data supplement system characterized by displaying data.