JP2003028653A - Communication type navigation device - Google Patents

Abstract

(57) [Summary] [Problem] To deliver an easy-to-read appropriate road map that can satisfy the occupants. SOLUTION: A wireless communication is carried out between an in-vehicle device and an information center, and a map around a location (requested location) requested by the in-vehicle device from a road map managed by the information center has a predetermined size. A communication type navigation device that cuts out only the information and distributes the information from the information center to the in-vehicle device. decide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication navigation device for delivering a road map centrally managed at an information center in response to a request from a vehicle side.

[0002]

[Prior Art] Centrally managing road maps at an information center,
There is known a communication navigation device that cuts out and distributes a road map around a designated place in response to a request from the vehicle side and displays it on an in-vehicle display (for example, JP-A-11-
339182).

In this type of apparatus, when a road map is requested to be delivered from the vehicle side, the information center cuts out a road map around the requested location and delivers it to the vehicle side, and displays the road map received at the vehicle side. There is. The information center centrally manages the road map and updates the data each time there is a change in the road map, so the vehicle side can always obtain the latest accurate road map, and the data update on the vehicle side is possible. The effort is saved.

[0004]

However, in the conventional communication type navigation device, since the road map around the requested place is cut out without considering the driving conditions of the vehicle in the information center, the road map to be distributed. May be difficult to see and may not always satisfy passengers. For example, a suburb road map with few landmarks on the map, a map with the sea and rivers displayed in about half the screen may be distributed, or the direction of the map request and the current direction of travel may be distributed. Because it has changed, it sometimes goes out of the map that I got immediately. In order to change the road map so that the occupants can be satisfied and the driving conditions of the vehicle are suitable, the occupant must specify the road map cutting condition and request the road map again.

It is an object of the present invention to deliver an easy-to-see and appropriate road map that can satisfy passengers.

[0006]

Means for Solving the Problems (1) The invention of claim 1 performs wireless communication between an on-vehicle device and an information center,
A communication-type navigation that cuts out a predetermined size of a map around a place (requested place) requested by the vehicle-mounted device from the road map managed by the information center and distributes it from the information center to the vehicle-mounted device. In the device, the information center determines the scale of the map to be distributed such that the display information amount included in the map having the predetermined size falls within a predetermined range. (2) The information center of the communication navigation device according to claim 2 determines the scale of the distribution map based on the density of roads as the display information amount, and distributes a detailed map with a larger scale as the density of roads increases. To do. (3) The information center of the communication navigation device according to claim 3 determines the scale of the distribution map based on the number of landmarks as the display information amount, and distributes a detailed map with a larger scale as the number of landmarks increases. To do. (4) The information center of the communication navigation device according to claim 4, when the requested location is a location occupying a wide range on a map (wide area), the display information amount is the display information around the wide area. The scale of the distribution map is determined by the amount. (5) The invention according to claim 5 wirelessly communicates between the vehicle-mounted device and the information center, and a place (requested place) requested by the vehicle-mounted device from the road map managed by the information center. Cut out a map of the surrounding area to a specified size,
A communication-type navigation device that distributes from the information center to the vehicle-mounted device, wherein the information center determines a familiarity level of a distribution requesting contractor regarding the vicinity of the requested location, and the higher the familiarity level, the more detailed the map becomes. Determine the scale of the delivery map. (6) The information center of the communication navigation device according to claim 6 determines that the closer the delivery address contractor's address is to the request location, the higher the familiarity level is. (7) The information center of the communication navigation device according to claim 7 determines that the closer the requested location this time is to the requested location of the map distributed in the past, the higher the familiarity level is. (8) The information center of the communication navigation device according to claim 8 determines that the closer the requested location this time is to the location pre-registered in the vehicle-mounted apparatus, the higher the familiarity level. (9) The invention according to claim 9 wirelessly communicates between an in-vehicle device and an information center, and a place (requested place) requested by the in-vehicle device from a road map managed by the information center. Cut out a map of the surrounding area to a specified size,
A communication-type navigation device that distributes from the information center to the in-vehicle device, wherein the information center has a ratio that the same wide area landmark occupies in the map of the predetermined size is a predetermined value or less, The cutout range of the map of the predetermined size is determined. (10) The invention of claim 10 performs wireless communication between an in-vehicle device and an information center, and a place (requested place) requested by the in-vehicle device from a road map managed by the information center. A communication-type navigation device that cuts out a peripheral map to a predetermined size and distributes from the information center to the in-vehicle device, wherein the information center is
Information on the current location and past passage points is obtained from the vehicle-mounted device, the traveling direction of the vehicle is predicted based on the current location and past passage points, and the predetermined traveling area is widened from the current location of the vehicle. Determine the cutout range of the size map.

[0007]

EFFECTS OF THE INVENTION (1) According to the invention of claim 1, the scale of the map to be distributed is determined so that the display information amount included in the map of a predetermined size falls within a predetermined range. , It is possible to avoid the distribution of suburban road maps with few landmarks on the map, or the map where the sea and rivers are displayed in about half of the screen. It is possible to deliver an appropriate road map that is easy to see. (2) According to the invention of claim 2, the scale of the distribution map is determined by the density of the road as the display information amount, and the detailed map having a larger scale is distributed as the density of the road is higher. Even if a map of an urban area is requested or a map of a depopulated area is requested, a map including a lot of valid display information can be reliably delivered. (3) According to the invention of claim 3, the scale of the distribution map is determined by the number of landmarks as the amount of display information, and the larger the number of landmarks, the more detailed the map is distributed. We can deliver easy-to-read maps that include many landmarks such as gas stations, family restaurants, banks, stations, and interchanges that are useful for driving. (4) According to the invention of claim 4, when the requested place is a wide area, the scale of the distribution map is determined by the amount of display information around the wide area as the display information amount. It is possible to avoid sending a meaningless map that only displays a wide area that occupies a large area in the map, and distribute an appropriate and easy-to-read wide area map that secures the amount of information displayed around the wide area. can do. (5) According to the invention of claim 5, the familiarity of the distribution requesting contractor with respect to the vicinity of the requested place is determined, and the scale of the distribution map is determined so that the higher the familiarity is, the more detailed the map becomes. It is possible to deliver a map including a lot of effective display information according to the familiarity of the delivery request contractor with one delivery. (6) According to the invention of claim 6, it is determined that the closer the address of the delivery request contractor is to the request location, the higher the familiarity is,
Since the scale of the distribution map is determined so that the more familiar the map becomes, the more detailed the map becomes, so even if it is a map around the location address that the distribution requesting contractor is familiar with, it is unfamiliar and far away from the location address. It is possible to deliver an easy-to-see map that includes a lot of valid display information, even if it is a map around a required place. (7) According to the invention of claim 7, it is determined that the closer the requested location is to the requested location of the map delivered in the past, the higher the familiarity is, and the higher the familiarity is, the more detailed the map is. I decided to determine the scale. The delivery request contractor is
It is considered that the geography around the place for which distribution has been requested in the past is roughly understood. Therefore, by distributing a more detailed map to a place closer to the past requested place, it is possible to deliver a map including more effective information. (8) According to the invention of claim 8, it is determined that the closer the requested location is to the location pre-registered in the vehicle-mounted device, the higher the familiarity degree is, and the higher the familiarity degree, the more detailed the map is distributed. I decided to determine the scale of the map. Since the distribution request contractor is sufficiently aware of the geography around the registered location in advance, the more detailed map is distributed to such a location closer to the registered location, thereby distributing a map including a lot of valid information. be able to. (9) According to the invention of claim 9, the cut-out range of the map of a predetermined size is determined so that the ratio of the same wide area landmark in the map of a predetermined size is equal to or less than a predetermined value. Since this is done, it is possible to avoid delivering a meaningless map that only displays wide area landmarks that occupy a large area in a map of a predetermined size. It is possible to distribute an appropriate wide-area map that secures the amount of display information in the vicinity. (10) According to the tenth aspect of the invention, information on the current location and past passage points is obtained from the vehicle-mounted device, and the traveling direction of the vehicle is predicted based on the current location and past passage points.
Since the cutout range of the map of a predetermined size is determined so that the area in the predicted traveling direction is wider than the current location of the vehicle, one-time distribution delivers an easy-to-see map that contains a lot of effective information on the traveling direction side. can do.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION << First Embodiment of the Invention >> FIG.
FIG. 3 is a diagram showing a configuration of a first exemplary embodiment. The communication type navigation device according to the first embodiment includes an in-vehicle device 1 mounted in a vehicle and an information center (hereinafter, simply referred to as a center) 10. The vehicle-mounted device 1 includes a GPS receiver 2, a gyroscope 3, a communication processing device 4, a mobile phone 5, an input device 6, a display device 7, and an integrated processing device 8. The GPS receiver 2 detects the current position of the vehicle by satellite navigation. The gyroscope 3 detects the traveling direction of the vehicle. Autonomous vehicle is drawn by drawing the traveling locus of the vehicle based on the traveling direction of the vehicle detected by the gyroscope 3 and the traveling distance of the vehicle detected by the vehicle speed sensor (not shown), and performing map matching with the road map data. The current position of the vehicle can be detected by navigation.

The communication processing device 4 performs various kinds of information communication with the information center 10 via the mobile phone 5. Instead of the mobile phone 5, an in-vehicle phone or a communication device dedicated to the navigation device may be used. The input device 6 is a device through which a vehicle occupant inputs a road map distribution request to the center 10. In addition, the distribution request of the road map to the center 10 is
Instead of operating the input device 6, the voice command of the occupant can be recognized by a voice input device (described later), for example. Alternatively, when it is determined that the vehicle-mounted device 1 is necessary, it is possible to automatically issue a road map distribution request without an occupant's request (automatic acquisition mode). The display device 7 is a display device such as an LCD for displaying the obtained road map.

The integrated processing device 8 is composed of a microcomputer and peripheral parts such as a memory, and is composed of an input processing section 8-1, a position information processing section 8-2, and a computing section 8-3 which are configured by a software form of the microcomputer. And a display processing unit 8-4.

On the other hand, the information center 10 includes a communication device 11, a communication processing device 12, a user information database (hereinafter, D).
B) 13, a map database (DB) 14, and a map cutout processing unit 15. Here, the user means a person who has signed a road map distribution contract with the information center 10. The communication processing device 12 performs various information communications with the vehicle-mounted device 1 via the communication device 11. User information DB
Reference numeral 13 stores user information such as user name, location, ID, and past map request history. Map DB1
Reference numeral 4 stores road information, place names, administrative boundaries, natural topographical information, various facilities, position information, and the like.

The map cut-out processing unit 15 is composed of a microcomputer and peripheral parts such as a memory, and is composed of a computing unit 15-1, a transmitting / receiving unit 15-2, and an authentication processing unit 15-, which are configured in a software form of the microcomputer.
Equipped with 3.

Next, FIG. 2 is a flow chart showing the operation of the integrated processing unit 8 of the vehicle-mounted device 1 and the map cut-out processing unit 15 of the information center 10. The operation of the first embodiment will be described with reference to these flowcharts. The in-vehicle device 1 confirms the map distribution request operation of the occupant by the input device 6 in step 1, and proceeds to step 2 when the request operation is made.

FIG. 3 shows a display device 7 and an input device 6 installed on, for example, an instrument panel in a vehicle compartment. The input device 6 includes a current position button 6a, an arbitrary position button 6b, a cursor moving direction key 6c, and the like. Current location button 6
a is an operation member for requesting a road map around the present location. The arbitrary place button 6b is an operation member for requesting a road map around the arbitrary place. When the occupant operates the arbitrary ground button 6b, as shown in FIG.
Display the arbitrary location search menu. When an address is selected from this menu with the direction key 6c, a lower level address menu as shown in FIG. 3 (c) is displayed, and when Kanagawa prefecture is selected with the direction key 6c, it is shown in FIG. 3 (d). So show the detailed address menu. It is possible to select an arbitrary point by such a procedure and request the center 10 for a road map around it.

It should be noted that a menu request button is prepared in the in-vehicle apparatus 1, and when the menu request button is operated by an occupant, the above-mentioned arbitrary location search menu consisting of a plurality of layers is obtained from the center 10 and each layer is obtained. It is also possible to select a desired location by selecting a menu. When the integrated processing device 8 of the vehicle-mounted device 1 automatically makes a road map distribution request on behalf of an occupant in the automatic acquisition mode, the request is made according to preset conditions.

When a map distribution request operation is performed by the input device 6, the input processing unit 8-1 inputs the map distribution request content in step 2, and the position information processing unit 8-2 responds to the request content. Read the location information of the current location or arbitrary location. In the following step 3, the communication processing device 4 makes a call from the mobile phone 5 to the center 10 and starts communication with the center 10.

When the center 10 receives the call from the mobile phone 5 of the vehicle-mounted device 1 by the communication device 11 and the communication processing device 12 in step 4, the process proceeds to steps 5 and 6. In steps 5 and 6, the in-vehicle device 1 and the center 10
In-vehicle device 1 to enable various information communication with
The negotiation processing is performed between the communication processing device 4 of FIG. 1 and the communication processing device 12 of the center 10 via the mobile phone 5 and the communication device 11.

The vehicle-mounted device 1 transmits the ID to the center 10 in step 7 after the negotiation process is completed. This I
D is an ID given by the center 10 in advance to identify the user, and the user information DB of the center 10
It is registered and stored in 13.

The center 10 receives the ID from the vehicle-mounted device 1 in step 8, and the ID sent from the vehicle-mounted device 1 by the authentication processing unit 15-3 is registered in the user information DB 13 in advance.
Authentication of whether or not it is D is performed. It is also possible to substitute the user's telephone number for this authentication without using the ID. Further, when it is not necessary to confirm whether or not the user is a registered user, the authentication may be omitted. In the following step 9, the result of ID authentication is transmitted to the vehicle-mounted apparatus 1.

The vehicle-mounted device 1 receives the ID authentication result in step 10 and checks in step 11 whether or not the authentication result of the registered user is obtained. If it is not confirmed that the user is a registered user, the process proceeds to step 12, where a warning is given by voice or display, and the process ends. When it is authenticated that the user is a registered user, the process proceeds to step 13, and the contents of the map distribution request including the position information of the present location or the designated location is transmitted to the center 10.

In step 14, the center 10 of the vehicle-mounted device 1
Step 15 receives the road map request contents sent from
Then, referring to the user information DB 13 as necessary such as past map request history, a road map around the current location or around the designated location is cut out from the map DB 14 according to the designated size. Here, the designated size is a vertical and horizontal size that can be displayed on the display device 7 of the vehicle-mounted device 1.

The in-vehicle device 1 is moved to the center 10 at step 17.
Received the road map sent from
The line is disconnected at 9 to terminate the communication with the center 10.
In step 20, the road map received from the center 10 is displayed on the display device 7 by the display processing unit 8-4.
When displaying a road map around the current position, the current position (indicated by an arrow in the figure) of the vehicle detected by satellite navigation or autonomous navigation is displayed in a superimposed manner as shown in FIG.

<< Modification of the First Embodiment of the Invention >> In the above-described first embodiment, the present position button 6 of the input device 6 is used.
Although the example of inputting the request contents of the map distribution using a and the arbitrary place button 6b has been shown, a modified example of inputting the request contents of the map distribution by voice will be described.

The input device 6 is provided with a start button 6d and a microphone 6e as shown in FIGS. The start button 6d is an operation member for starting a map distribution request, and the microphone 6e is a device for inputting the voice uttered by the occupant. The components other than the start button 6d and the microphone 6e are the same as the components shown in FIG. 1, and the illustration and description thereof are omitted.

When the occupant operates the start button 6d of the input device 6, the voice recognition section 8-5 of the integrated processing device 8 becomes
The occupant's voice is recorded by the microphone 6e and analyzed. Figure 5
As shown in FIG. 5, when the occupant utters “any place”, the voice recognition unit 8-5 recognizes the utterance content and displays the arbitrary place search menu on the display device 7 as shown in FIG. 5B.

<< Other Modifications of First Embodiment of Invention >>
Another modification will be described in which, instead of operating the operation member or inputting the map distribution request by voice recognition, the operator directly talks with the operator of the information center 10 and transmits the map distribution request.

The input device 6 is provided with a connection button 6f for connecting the center 10 to the telephone line, as shown in FIGS. In addition, the center 10 has an operator 16 who receives a map distribution request from a user via a telephone line, and a microphone 17 for communication and a speaker 1
8 and an input device 19 for inputting a user's map distribution request to the map cutout processing unit 15.

When the occupant operates the connection button 6f of the input device 6, the integrated processing device 8 makes a call from the mobile phone 5 to the center 10 via the communication processing device 4. In the center 10, the call from the vehicle-mounted device 1 is received by the communication device 11, the operator 16 accepts the user's map distribution request, and inputs the user's ID information and map request contents from the input device 19. The map cut-out processing unit 15 refers to the user information DB 13 and authenticates whether or not the user is a registered user based on the user ID.
User information D by cutting out the map of the requested range from B14
It is temporarily stored in B13. Then, the call with the user is ended and the line is disconnected.

After the line between the vehicle-mounted device 1 and the center 10 is disconnected, the vehicle-mounted device 1 again makes a call to the center 10, and the communication processing unit 4 of the vehicle-mounted device 1 communicates with the center 10 as described above. Negotiation processing is performed with the processing device 12. Then, the map cut-out processing unit 15 of the center 10 reads out the road map temporarily stored in the user information DB 13, and the communication processing device 12 and the communication device 1 are read.
1 to the in-vehicle device 1 via 1. The integrated processing device 8 of the vehicle-mounted device 1 receives the road map sent from the center 10 via the mobile phone 5 and the communication processing device 4, processes it into display data by the display processing unit 8-4, and displays it. To display.

<< Road Map Cutout Process >> Next, the road map cutout process executed by the calculation unit 15-1 of the map cutout processing unit 15 of the center 10 will be described. FIG. 9 shows details of the map cut-out processing unit 15 of the information center 10. The calculation unit 15-1 of the map cut-out processing unit 15 includes six calculation units configured in the software form of a microcomputer, that is, a map density calculation unit 30, a user information calculation unit 31, a wide area map calculation unit 32, and a wide area land. A mark calculator 33, a vehicle traveling direction calculator 34, and a landmark calculator 35 are provided. These calculation units 30-
The scale and range of the map to be cut out in response to the map distribution request from the vehicle-mounted device 1 are determined by 35, and the map is cut out from the map DB 14.

FIG. 10 shows a map scale that can be provided from the center 10. This scale can be changed.

FIG. 11 is a flow chart showing the processing of the map density calculating unit 30. The map distribution request from the vehicle-mounted device 1 is first sent to the map density calculation unit 30. The map congestion degree calculation unit 30 confirms the content of the map distribution request in step 31, and acquires the information regarding the requested location from the map DB 14 in the following step 32. In step 33, it is confirmed whether or not the requested place is in the ordinance-designated city. If it is in the ordinance-designated city, the process proceeds to step 34, and it is confirmed whether or not the requested place is around the station. For example, by referring to the map DB 14, it is confirmed whether or not there is a railway station within a radius of 1 km from the requested place, and if there is a station, the requested place is determined to be around the station.

When the requested place is near the station in the city designated by the Cabinet Order, the scale of the distribution map is 1/10000 of the scale 2.
Tentatively decide. On the other hand, if the requested place is not in the vicinity of the station even in the city designated by the government, the scale of the distribution map is 1/3
Tentatively decided to 20000. If the requested place is not in the government-designated city, the process proceeds to step 35 to check whether the requested place is near the station. If the requested location is not in the government-designated city but near the station, the scale of the distribution map is provisionally determined to be 1/20000 of the scale 3. Furthermore, when the requested location is not in the government-designated city or near the station, the scale of the distribution map is provisionally determined to be 1/40000 of the scale 4.

Note that, as shown in FIG. 12, the scale of the distribution map may be provisionally determined only by whether or not the requested place is in a government-designated city. In other words, if the requested location is in a government-designated city, it is provisionally determined to be 1/20000 of scale 3, and if it is not in a government-designated city, it is 1/40000 of scale 4.
Tentatively decide. Further, as shown in FIG. 13, the scale of the distribution map may be provisionally determined only by whether or not the requested place is near the station. That is, if the requested location is near the station, it is provisionally determined to be 1/20000 of scale 3, and if it is not located near the station, it is provisionally determined to be 1/40000 of scale 4.

As described above, the density of the map is determined depending on whether the map-requested place is the ordinance-designated city and the vicinity of the station. If the map-requested place is near the ordinance-designated city and station, it is determined that the map density is high. When a detailed map with a large scale is selected and the map requesting place is not a government-designated city or around a station, it is determined that the map density is low and a large-scale map with a small scale is selected. The determination of the map density is not limited to the above embodiment. For example, it may be determined that the population is high, such as a public office, an airport, and a shopping district, or a place where roads, intersections, buildings, and the like are dense. As a result, even if a map of an urban area is requested or a map of a depopulated area is requested, it is possible to reliably deliver a map including a large amount of display information that is effective in one delivery.

FIG. 14 is a flow chart showing the processing of the user information calculation section 31. Based on the distance between the requested location of the map and the user's whereabouts, and the distance between the previously requested map requested location and the currently requested map requested by the user information calculation unit 31. The scale of the distribution map provisionally determined by the density calculation unit 30 is changed.

The user information calculation section 31 executes step 41.
Confirm the contents of the map distribution request at and follow Step 4
In step 2, information about the requested location is acquired from the map DB 14. Next, in step 43, information such as the location address of the user is acquired from the user information DB 13, and in step 44, the location address of the user and the requested location of the map are compared.
In step 45, it is confirmed whether or not the distance between the user's location address and the requested location of the map is less than 2 km, for example. If it is less than 2 km, it is checked in step 46 whether the requested location of this time is around the requested location of the past distribution map, for example, whether the requested location of this time is within 1 km of the requested location of the past.

If the distance between the user's location address and the requested location of the map is less than 2 km and the requested location of this time is in the vicinity of the requested location of the past, the process proceeds to step 47, and the map density calculation unit 30 makes a tentative decision. Increase the scale and change to a detailed map. For example, the provisionally determined scale is 1/20 of scale 3.
If it is 000, it is changed to 1/10000 of scale 2. On the other hand, if the distance between the user's location address and the requested location of the map is less than 2 km and the requested location of this time is not around the previously requested location, the process proceeds to step 48, and the map congestion degree calculation unit 30 makes a tentative decision. Maintain scale.

If the distance between the user's location address and the requested location of the map is 2 km or more, the process proceeds to step 49 and 10 k
Check whether it is less than m. If it is less than 10 km, the process proceeds to step 50, and it is confirmed whether or not the requested location this time is near the requested location in the past. If the distance between the user's location address and the requested location of the map is less than 10 km and the requested location of this time is in the vicinity of the previously requested location, the process proceeds to step 48 and the map density calculation unit 30 temporarily determines the map. Maintain scale. On the other hand, if the distance between the user's location address and the requested location of the map is less than 10 km and the requested location of this time is not around the previously requested location, the process proceeds to step 52 to reduce the tentatively determined scale to create a wide area map. change. For example, if the temporarily determined scale is 1/20000 of the scale 3, the scale is changed to 1/40000 of the scale 4.

When the distance between the user's location address and the requested location on the map is 10 km or more, the process proceeds to step 51, and it is confirmed whether or not the requested location at this time is around the previously requested location. If the distance between the user's address and the requested location on the map is 10 km or more, and the requested location this time is around the past requested location, proceed to step 52, reduce the provisionally determined scale, and change to the wide area map. . On the other hand, when the distance between the user's location address and the requested location on the map is 10 km or more, and the requested location this time is not around the previously requested location, the process proceeds to step 53, and the provisionally determined scale is reduced by two steps, and Change to a wide area map. For example, if the temporarily determined scale is 1/20000 of scale 3, 1/800 of scale 5
Change to 00.

Note that, as shown in FIG. 15, the scale of the map may be changed only in accordance with the distance between the user's location address and the requested location of the map, or as shown in FIG. The scale of the map may be changed according to only the distance between the requested location and the past requested location.

According to the user information calculation unit 31, even a map around the location address that the user (delivery request contractor) is familiar with is a map around the location where the user is unfamiliar and far away from the location address. Even with a single distribution, it is possible to distribute an easy-to-see map that includes a lot of valid display information. Further, it is considered that the user roughly understands the geography around the place where the distribution request has been made in the past. Therefore, by distributing a more detailed map to a place closer to the past requested place, it is possible to deliver a map including more effective information in one delivery.

It should be noted that in-vehicle device 1 is pre-registered at home, work place, places frequently visited at business trips, places frequently visited such as department stores, supermarkets, golf courses, villas, etc.
Data of these registration locations is sent to the information center 10 at the time of requesting map distribution or in advance and stored in the user information DB 13. Then, at the time of the map distribution request, the location requested this time is the location pre-registered in the in-vehicle apparatus 1 (user information D
The familiarity may be determined to be higher as it is closer to (stored in B13), and the scale of the distribution map may be determined so that the higher the familiarity is, the more detailed the map becomes. Since the user is sufficiently aware of the geography around the registered location in advance, it is possible to distribute a map containing a lot of useful information by distributing a detailed map for such a location closer to the registered location. .

FIG. 17 is a flow chart showing the processing of the wide area map calculation unit 32. Amusement park, golf course, ski resort,
Leisure facilities such as large-scale parks, mountains, plateaus, farms,
For places that occupy a large area on the map, such as the sea, coast, and lakes, the minimum scale for surrounding maps is set in advance so that a valid map can be provided when the user requests those wide areas. Determined collectively or individually, the minimum scale of each wide area is stored in the map DB 14.

The wide area map calculation unit 32 confirms the contents of the map distribution request in step 61, and then the map D in step 62.
Information on the requested location is acquired from B14. Next, in step 63, the wide area location data stored in the map DB 14 is referred to, and if the location requested by the user is the wide area location, the minimum scale of the location is read. Step 64
The map density calculation unit 30 and the user information calculation unit 31
Compare the provisional scale determined in step 2 and the minimum scale to see if the provisional scale is greater than the minimum scale. If the temporary scale is greater than the minimum scale, then change from the temporary scale to the minimum scale to provide a valid scale map suitable for a wide area. On the other hand, if the temporary scale is equal to or smaller than the minimum scale, the temporary scale remains as it is and is not changed.

According to the wide area map calculation unit 32, it is possible to avoid delivering a meaningless map in which a wide area that occupies a large area is displayed in a map of a predetermined size. It is possible to deliver an appropriate and easy-to-read wide area map that secures the amount of display information around the wide area by delivering once.

FIG. 18 is a flow chart showing the processing of the wide area landmark calculation section 33. In step 71, the contents of the map distribution request are confirmed, and in the following step 72, the map of the requested location of the scale determined by the wide area map calculation unit 32 is cut out from the map DB 14 by a predetermined size. here,
The predetermined size is a size that can be displayed on the display device 7 of the vehicle-mounted device 1. In step 73, the wide area landmarks included in the cut out map, that is, the wide area landmarks that occupy a large area on the map such as the sea, rivers, mountains, lakes, farms, and ranches are confirmed. If the same wide area landmark occupies less than 30% of the cut out map, the cut out range of the map is not changed.

On the other hand, as shown in FIG. 18A, when the same wide area landmark occupies an area of 30% or more of the cut out map, the process proceeds to step 75. In step 75, as shown in FIG. 18B, the cut-out range is changed so that the area occupied by the same wide area landmark on the map is less than 30%, and the map is cut out from the map DB 14 again.

According to the wide area landmark calculation unit 33, it is possible to avoid delivering a meaningless map in which a wide area landmark occupying a large area is displayed in a map of a predetermined size. It is possible to deliver an appropriate easy-to-view wide area map that secures the amount of display information around a wide area landmark by one delivery.

FIG. 19 is a flow chart showing the processing of the vehicle traveling direction calculation unit 34. In step 81, the contents of the map distribution request are confirmed, and in the following step 82, it is confirmed whether or not a map around the current location is requested. If the map around the current location is not requested, the cut-out range of the map is not changed.

On the other hand, when the map around the current location is requested, the process proceeds to step 83, and the history information of the current location A and the past passage point B is acquired from the vehicle-mounted device 1. Continued Step 84
Then, the traveling direction C of the vehicle is predicted based on the history of the current position A and the past passage point B. Then, in step 85, the cutout range is changed so that the area in the traveling direction of the vehicle is widened, and the map is cut out from the map DB 14 again.

According to the vehicle traveling direction calculation unit 34, 1
It is possible to deliver an easy-to-see map that includes a lot of valid display information on the traveling side by delivering the map once.

FIG. 20 is a flow chart showing the processing of the landmark calculator 35. In step 91, the content of the map distribution request is confirmed, and in the subsequent step 92, the landmark is added to the map provisionally determined by the vehicle traveling direction computation unit 34 or, in the case of the designation of an arbitrary location, the map provisionally determined by the wide area landmark computation unit 33. Check if it is included. Landmarks such as gas stations, banks, convenience stores, fast food restaurants, family restaurants, and train stations assist users when traveling to their destination, and at least one or more should be included in the distribution map. Is desirable. When the landmark is included, the cut-out range of the map is not changed.

On the other hand, if the landmark is not included, the process proceeds to step 93, the scale of the map is increased by one step, and the map D is displayed.
Cut out the map again from the wide area map of B14. It is confirmed whether or not the map cut out in step 94 includes a landmark, and if the map is included, the cut out map is determined as a final distribution map. On the other hand, if the clipped map does not include the landmark, the process returns to step 93 to increase the scale of the map and repeat the clipping from the wide area map until the clipped map includes the landmark.
It should be noted that the number of landmarks included in the map can be arbitrarily determined.

The landmark calculation unit 35 can deliver an easy-to-read map that includes many landmarks such as gas stations, family restaurants, banks, stations, and interchanges that are useful for driving in one delivery.

The scale of the map and the cut-out range are determined by the above-mentioned cut-out processing, and this map is cut out from the map DB 14 as a final distribution map and transmitted to the vehicle unit 1.

In the above-described first embodiment, the map density calculation unit 3 is provided in the calculation unit 15-1 of the map cutout processing unit 15.
0, the user information calculation unit 31, the wide area map calculation unit 32, the wide area landmark calculation unit 33, the vehicle traveling direction calculation unit 34, and the landmark calculation unit 35 are shown as an example. Processing may be performed. In the following, another embodiment will be described in which each of the arithmetic units 30 to 35 is used alone to perform the clipping process.

<Second Embodiment of the Invention> First, a map cutting process by only the map density calculating unit 30 will be described. FIG. 21 is a map cutout processing unit 1 according to the second embodiment.
5 shows the configuration. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. The calculation unit 15-1 of the map cutout processing unit 15 according to the second embodiment has a map congestion degree calculation unit 30.
Equipped with only.

FIG. 22 is a flow chart showing the map cutting process of the calculation unit 15-1. It should be noted that the same step numbers are given to the steps that perform the same processing as in the flowchart shown in FIG. 11, and the description will focus on the differences. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof are omitted.

Upon receiving the map distribution request from the vehicle-mounted device 1, the arithmetic unit 15-1 confirms whether the requested location is the government-designated city and the vicinity of the station, and determines whether it is the government-designated city and the vicinity of the station. The scale of the distribution map is determined accordingly. It should be noted that the scale of the distribution map may be determined only depending on whether or not the city is a government-designated city as shown in FIG. 23, or may be determined only depending on whether or not it is near the station as shown in FIG. Good. When the scale of the distribution map is determined, the process proceeds to step 39, and the map of the requested location of the determined scale is cut out from the map DB 14 by a predetermined size. Here, the predetermined size means the display device 7 of the vehicle-mounted device 1.
It is a size that can be displayed on.

<< Third Embodiment of the Invention >> Next, a map cutting process only by the user information calculation section 31 will be described. FIG. 25 shows the configuration of the map cutout processing unit 15 according to the third embodiment. The map cut-out processing unit 15
The configuration other than that is the same as the configuration shown in FIGS. 1 and 8,
Illustration and description are omitted. The calculation unit 15-1 of the map cutout processing unit 15 according to the third embodiment includes only the user information calculation unit 31.

FIG. 26 is a flow chart showing the map cutting process of the calculation unit 15-1. It should be noted that the same step numbers are assigned to the steps that perform the same processing as in the flowchart shown in FIG. 14, and the description will focus on the differences. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof will be omitted.

If the distance between the user's location address and the requested location on the map is less than 2 km and the requested location this time is in the vicinity of the past requested location, the process proceeds to step 54, and the scale is reduced to 1/10000. Decide and select a detailed map. On the other hand, if the distance between the user's location address and the requested location on the map is less than 2 km, and the requested location this time is not in the vicinity of the previously requested location, proceed to step 55 and determine the scale to 1/20000 of scale 3. To do.

If the distance between the user's location address and the requested location on the map is less than 10 km and the requested location this time is in the vicinity of the previously requested location, the process proceeds to step 55, and the scale is reduced to 1/20000 of scale 3. decide. On the other hand, if the distance between the user's location address and the requested location on the map is less than 10 km and the requested location this time is not in the vicinity of the requested location in the past, the process proceeds to step 56 and 1/4000 of the scale 4.
Decide on a scale of 0.

If the distance between the user's location address and the requested location on the map is 10 km or more and the requested location this time is in the vicinity of the previously requested location, the process proceeds to step 56, and the scale is reduced to 1/40000 of scale 4. decide. On the other hand, if the distance between the user's location address and the requested location on the map is 10 km or more and the requested location this time is not near the previous requested location, the process proceeds to step 57, where the scale 5 is 1/8000.
Decide on a scale of 0.

Note that, as shown in FIG. 27, the scale of the map may be determined only according to the distance between the user's location address and the requested location of the map, or as shown in FIG. The scale of the map may be determined based only on the distance between the requested location and the past requested location.

When the scale of the distribution map is determined, step 58
Then, the map DB 14 for the map of the requested location of the determined scale is displayed in the display device 7 of the vehicle-mounted device 1 by a predetermined size.
Cut out from.

<Fourth Embodiment of the Invention> A map cutting process by only the wide area map calculation unit 32 will be described.
FIG. 29 shows the configuration of the map cut-out processing unit 15 according to the fourth embodiment. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. The calculation unit 15-1 of the map cut-out processing unit 15 according to the fourth embodiment includes only the wide area map calculation unit 32.

FIG. 30 is a flow chart showing the map cutting process of the calculation unit 15-1. It should be noted that the same step numbers are given to the steps that perform the same processing as in the flowchart shown in FIG. 17, and the description will focus on the differences. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof will be omitted.

The contents of the map distribution request from the vehicle-mounted device 1 are confirmed, and the requesting place is a leisure facility such as an amusement park, a golf course, a ski resort, a large-scale park, a mountain, a highland, a pasture farm, the sea, a coast, a lake For example, in the case of a place that occupies a wide range on the map, that is, a wide-area place, the minimum scale of the place is read from the map DB 14. Then, in step 65, the map of the minimum required location is cut out from the map DB 14 by a predetermined size that can be displayed on the display device 7 of the vehicle-mounted device 1.

<Fifth Embodiment of the Invention> A map cutting process only by the wide area landmark calculation unit 33 will be described. FIG. 31 shows the configuration of the map cutout processing unit 15 according to the fifth embodiment. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. The calculation unit 15-1 of the map cut-out processing unit 15 of the fifth embodiment includes only the wide area landmark calculation unit 33.

FIG. 32 is a flow chart showing the map cutting process of the calculation unit 15-1. It should be noted that the same step numbers are given to the steps that perform the same processing as in the flowchart shown in FIG. 18, and the description will focus on the differences. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof will be omitted.

The contents of the map distribution request from the vehicle-mounted device 1 are confirmed, and in step 72A, the map of the requested location of a predetermined scale is displayed.
A predetermined size that can be displayed on the display device 7 of the vehicle-mounted device 1 is cut out from the map DB 14. When the wide area landmark included in the cut out map, that is, the area occupied by the sea, river, mountain, lake, farm, ranch, etc. is confirmed, and the same wide area landmark occupies less than 30% of the area of the cut out map Does not change the map clipping range. On the other hand, if the same wide area landmark occupies 30% or more of the cut out area of the map, change the cutout area to the direction that the same wide area landmark occupies less than 30% of the area of the map, and then re-open it again. A map is cut out from the map DB 14.

<Sixth Embodiment of the Invention> A map cutting process performed only by the vehicle traveling direction calculation unit 34 will be described. FIG. 33 is a map cutout processing unit 1 of the sixth embodiment.
5 shows the configuration. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. The calculation unit 15-1 of the map cut-out processing unit 15 according to the sixth embodiment is the vehicle traveling direction calculation unit 3.
It has only 4.

FIG. 34 is a flow chart showing the map cutting process of the calculation unit 15-1. Note that the same step numbers are given to the steps that perform the same processing as in the flowchart shown in FIG. 19, and the differences will be mainly described. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof will be omitted.

The contents of the map distribution request from the vehicle-mounted device 1 are confirmed, and in step 81A, a map of the requested location of a predetermined scale is displayed.
A predetermined size that can be displayed on the display device 7 of the vehicle-mounted device 1 is cut out from the map DB 14. If the user is requesting a map of a point (arbitrary place) other than the current location, the cut map is delivered. On the other hand, if the user is requesting a map around the current location, predict the traveling direction of the vehicle, change the cutout range so that the area in the traveling direction of the vehicle becomes wider,
The map is cut out from the map DB 14 again.

<< Seventh Embodiment of the Invention >> A map cutting process only by the landmark calculating section 35 will be described. FIG. 35 is a map cutout processing unit 1 of the seventh embodiment.
5 shows the configuration. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. The calculation unit 15-1 of the map cut-out processing unit 15 according to the seventh embodiment is the landmark calculation unit 3
It has only 5.

FIG. 36 is a flow chart showing the map cutting process of the arithmetic unit 15-1. It should be noted that the same step numbers are given to the steps that perform the same processing as in the flowchart shown in FIG. 20, and the description will focus on the differences. Further, regarding the processing other than the operation unit 15-1, the above-mentioned first
Since the processing is the same as that of the embodiment described above, illustration and description thereof will be omitted.

The contents of the map distribution request from the vehicle-mounted device 1 are confirmed, and in step 91A, the map of the requested place of a predetermined scale is displayed.
A predetermined size that can be displayed on the display device 7 of the vehicle-mounted device 1 is cut out from the map DB 14. If the cut out map contains at least one landmark, the cut out map is delivered. On the other hand, if the cut out map does not contain any landmarks, increase the scale of the map and cut out a map of a predetermined size again from a wider area map to check if the landmarks are included. To do.
This process is repeated until at least one landmark is included in the cutout map having a predetermined size.

<Eighth Embodiment of the Invention> As shown in FIG. 37, the calculator 15-1 of the map cut-out processor 15
An eighth embodiment including the user information calculation unit 31, the map density calculation unit 30, and the landmark calculation unit 35 will be described. The configuration other than the map cut-out processing unit 15 is the same as the configuration shown in FIGS. 1 and 8, and illustration and description thereof will be omitted. Further, the processes other than the calculation unit 15-1 are the same as the processes of the above-described first embodiment, and the illustration and description thereof will be omitted.

First, referring to FIG. 38, the user information calculation unit 3
The process 1 will be described. 14 and 26.
The same step numbers are given to the steps that perform the same processing as the above, and the difference will be mainly described. If the distance between the user's address and the requested location on the map is less than 2 km and the requested location this time is in the vicinity of the previously requested location, proceed to step 54, and determine the scale of 1/10000 of scale 2, Select a detailed map. On the other hand, if the distance between the user's location address and the requested location on the map is less than 2 km, and the requested location this time is not in the vicinity of the previously requested location, proceed to step 55 and determine the scale to 1/20000 of scale 3. To do.

If the distance between the user's location address and the requested location on the map is less than 10 km and the requested location this time is in the vicinity of the previously requested location, the process proceeds to step 55 and the scale is reduced to 1/20000 of scale 3. decide. On the other hand, if the distance between the user's location address and the requested location on the map is less than 10 km and the requested location this time is not in the vicinity of the requested location in the past, the process proceeds to step 56 and 1/4000 of the scale 4.
Decide on a scale of 0.

If the distance between the user's location address and the requested location on the map is 10 km or more and the requested location this time is in the vicinity of the past requested location, proceed to step 56 and reduce the scale to 1/40000. decide. On the other hand, if the distance between the user's location address and the requested location on the map is 10 km or more and the requested location this time is not near the previous requested location, the process proceeds to step 57, where the scale 5 is 1/8000.
Decide on a scale of 0.

Note that, as shown in FIG. 39, the scale of the map may be determined only in accordance with the distance between the location address of the user and the requested location of the map, or as shown in FIG. The scale of the map may be determined based only on the distance between the requested location and the past requested location.

Next, referring to FIG. 41, the map density calculating unit 30 will be described.
The process will be described. Note that the same step numbers are assigned to the steps that perform the same processing as in FIG. 11 and FIG. 22, and the differences will be mainly described. If the requested place is near the station in the city designated by the Cabinet Order, the scale of the distribution map is increased in step 36A to select a more detailed map. on the other hand,
If the requested place is not in the vicinity of the station even in the ordinance-designated city, the current scale is not changed in step 37A. If the requested location is not in the government-designated city but is near the station, the current scale is not changed in step 37A. Further, if the requested place is neither in the government-designated city nor in the vicinity of the station, the scale of the map is reduced in step 38A and a wider area map is selected.

Note that, as shown in FIG. 42, the scale of the distribution map may be provisionally determined only based on whether or not the requested place is in a government-designated city. As shown in FIG. 43, the requested place is around the station. The scale of the distribution map may be provisionally determined only by whether or not

The processing of the landmark calculator 35 will be described with reference to FIG. It should be noted that the same step numbers are given to the steps that perform the same processing as in FIG. 20 and FIG. 36, and the differences will be mainly described. The content of the map distribution request from the vehicle-mounted device 1 is confirmed, and in step 91B, the map of the requested location is displayed on the display device 7 of the vehicle-mounted device 1 at the scale temporarily determined by the user information calculation unit 31 and the map density calculation unit 30. A predetermined size that can be displayed is cut out from the map DB 14.

When the cut out map includes at least one landmark, the cut out map is delivered. On the other hand, if the cut out map does not contain any landmarks, increase the scale of the map and cut out a map of a predetermined size again from a wider area map to check if the landmarks are included. To do. This process is repeated until at least one landmark is included in the cutout map having a predetermined size.

The operation unit 1 of the map cutout processing unit 15
In 5-1 the combination and order of the map density calculation unit 30, the user information calculation unit 31, the wide area map calculation unit 32, the wide area landmark calculation unit 33, the vehicle traveling direction calculation unit 34, and the landmark calculation unit 35 are as described above. The invention is not limited to the eighth embodiment described above.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment.

FIG. 2 is a flowchart showing the operation of the first embodiment.

FIG. 3 is a diagram showing an input procedure of a map distribution request.

FIG. 4 is a diagram showing a display example of a road map.

FIG. 5 is a diagram showing an input procedure of a map distribution request by voice.

FIG. 6 is a diagram showing a configuration of a modification of the first embodiment.

FIG. 7 is a diagram showing an input procedure of a map distribution request by a call with an information center.

FIG. 8 is a diagram showing a configuration of another modification of the first embodiment.

FIG. 9 is a diagram illustrating a detailed configuration of a map cutout processing unit according to the second embodiment.

FIG. 10 is a diagram showing a list of map scales.

FIG. 11 is a flowchart showing processing of a map congestion degree calculation unit.

FIG. 12 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 13 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 14 is a flowchart showing processing of a user information calculation unit.

FIG. 15 is a flowchart showing another process of the user information calculation unit.

FIG. 16 is a flowchart showing another process of the user information calculation unit.

FIG. 17 is a flowchart showing processing of a wide area map calculation unit.

FIG. 18 is a flowchart showing processing of a wide area landmark calculation unit.

FIG. 19 is a flowchart showing a process of a vehicle traveling direction calculation unit.

FIG. 20 is a flowchart showing processing of a landmark calculation unit.

FIG. 21 is a diagram showing a configuration of a map cutout processing unit according to the second embodiment.

FIG. 22 is a flowchart showing processing of a map congestion degree calculation unit.

FIG. 23 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 24 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 25 is a diagram illustrating a configuration of a map cutout processing unit according to the third embodiment.

FIG. 26 is a flowchart showing processing of a user information calculation unit.

FIG. 27 is a flowchart showing another process of the user information calculation section.

FIG. 28 is a flowchart showing another process of the user information calculation section.

FIG. 29 is a diagram showing a configuration of a map cutout processing unit according to the fourth embodiment.

FIG. 30 is a flowchart showing processing of a wide area map calculation unit.

FIG. 31 is a diagram showing a configuration of a map cutout processing unit according to the fifth embodiment.

FIG. 32 is a flowchart showing processing of a wide area landmark calculation unit.

FIG. 33 is a diagram showing a configuration of a map cutout processing unit according to the sixth embodiment.

FIG. 34 is a flowchart showing a process of a vehicle traveling direction calculation unit.

FIG. 35 is a diagram showing a configuration of a map cutout processing unit according to the seventh embodiment.

FIG. 36 is a flowchart showing processing of a landmark calculation unit.

FIG. 37 is a diagram showing a configuration of a map cutout processing unit according to the eighth embodiment.

FIG. 38 is a flowchart showing processing of a user information calculation section.

FIG. 39 is a flowchart showing another process of the user information calculation section.

FIG. 40 is a flowchart showing another process of the user information calculation section.

FIG. 41 is a flowchart showing processing of a map congestion degree calculation unit.

FIG. 42 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 43 is a flowchart showing another process of the map congestion degree calculation unit.

FIG. 44 is a flowchart showing processing of a landmark calculation unit.

[Explanation of symbols]

1 In-vehicle device 2 GPS receiver 3 gyroscope 4 Communication processing device 5 mobile phones 6 Input device 6a Current location button 6b Optional button 6c Direction key 6d Start button 6f connection button 6e microphone 7 Display 8 integrated processing equipment 8-1 Input processing unit 8-2 Position information processing unit 8-3 Operation unit 8-4 Display processing unit 8-5 Speech recognition processing unit 10 Information Center 11 communication equipment 12 Communication processing device 13 user information database 14 map database 15 Map clipping processing section 15-1 Operation part 15-2 Transmitter / receiver 15-3 Authentication processing unit 16 operators 17 Mike 18 speakers 19 Input device 30 Map density calculation unit 31 User information calculator 32 Wide area map calculator 33 Wide area landmark calculator 34 Vehicle traveling direction calculator 35 Landmark calculator

Continued front page    F term (reference) 2C032 HB25 HC08 HC24                 2F029 AA02 AB03 AB07 AC02 AC08                       AC14 AC16 AD07                 5H180 AA01 BB05 FF04 FF05 FF13                       FF22 FF27 FF33                 5K067 AA34 AA41 BB03 BB36 EE02                       EE10 FF03 FF23 HH21

Claims (10)

[Claims] 1. A location (hereinafter referred to as a required location) requested by the vehicle-mounted device in a road map managed by the information center through wireless communication between the vehicle-mounted device and the information center. Is a communication-type navigation device that cuts out a map of a predetermined size and distributes it from the information center to the in-vehicle device, wherein the information center has a display information amount included in the map of the predetermined size within a predetermined range. A communication type navigation device characterized in that the scale of a map to be distributed is determined so that 2. The communication-type navigation device according to claim 1, wherein the information center determines the scale of the distribution map based on the density of roads as the display information amount, and the higher the density of roads, the larger the scale. A communication type navigation device characterized by delivering a detailed map. 3. The communication type navigation device according to claim 1, wherein the information center determines the scale of the distribution map based on the number of landmarks as the display information amount, and the larger the number of landmarks, the larger the scale. A communication type navigation device characterized by delivering a detailed map. 4. The communication type navigation device according to claim 1, wherein the information center displays the amount of information displayed when the requested location is a location occupying a wide range on a map (hereinafter referred to as a wide area location). A communication type navigation device, characterized in that the scale of the distribution map is determined by the amount of display information around the wide area. 5. A place (hereinafter referred to as a required place) around a location requested by the vehicle-mounted device from a road map managed by the information center through wireless communication between the vehicle-mounted device and the information center. Is a communication-type navigation device that cuts out a map of a predetermined size and distributes it from the information center to the in-vehicle device, wherein the information center determines a familiarity level of a distribution requesting contractor regarding the periphery of the requested location, A communication type navigation device characterized in that the scale of a distribution map is determined so that the higher the degree, the more detailed the map. 6. The communication navigation device according to claim 5, wherein the information center determines that the familiarity is higher as the address of the distribution requesting contractor is closer to the requesting location. Navigation device. 7. The communication navigation apparatus according to claim 5, wherein the information center determines that the closer the requested location this time is to the requested location of the map distributed in the past, the higher the familiarity level is. Communication type navigation device. 8. The communication-type navigation device according to claim 5, wherein the information center determines that the closer the requested location this time is to the location pre-registered in the vehicle-mounted device, the higher the familiarity level is. Characteristic communication navigation device. 9. A location (hereinafter referred to as a request location) requested by the vehicle-mounted device in a road map managed by the information center by wireless communication between the vehicle-mounted device and the information center. Is a communication-type navigation device that cuts out a map of a predetermined size and distributes it from the information center to the in-vehicle device, wherein the information center occupies the same wide area landmark in the map of the predetermined size. A communication-type navigation device, characterized in that the cut-out range of the map of a predetermined size is determined so that the ratio becomes a predetermined value or less. 10. A location (hereinafter referred to as a required location) requested by the vehicle-mounted device in a road map managed by the information center by wireless communication between the vehicle-mounted device and the information center. Cut out the map of the specified size,
A communication-type navigation device that distributes from the information center to the in-vehicle device, wherein the information center obtains information on the current location and past passage points from the on-vehicle device, and based on the current location and past passage points, the vehicle A communication-type navigation device, which predicts a traveling direction, and determines a cutout range of the map having the predetermined size such that an area in the predicted traveling direction is widened from a current position of the vehicle.