JP4395468B2 - Navigation system, portable terminal device, and map display method - Google Patents

Description

The present invention makes a route search request to a route search server using a mobile terminal device such as a mobile phone, receives map data, guidance route data, guidance points, guidance data, etc. from the route search server and displays the display screen of the mobile terminal device It is related with the navigation system which displays it.
The present invention performs a route search for an automobile using a mobile terminal device, particularly in the navigation system as described above, and the degree of detail (density) of the map image displayed on the display means according to the moving speed of the mobile terminal device. The present invention relates to a navigation system, a portable terminal device, and a map display method that limit display of a map image with a certain level of detail while traveling in an urban area or the like when switching to a different map image.

  Conventionally, there are known navigation devices and navigation systems that guide a user by searching for a route from a desired departure point to a destination using map data and road data. Such navigation devices and navigation systems are known. As a car navigation device that is installed in a car and guides the route to the driver, a mobile phone is used as a navigation terminal to send a route search request to the route search server, receive the result, and receive route guidance Navigation systems have been put into practical use.

  The car navigation device uses a GPS (Global Positioning System), receives GPS signals transmitted from a plurality of GPS satellites orbiting the earth with a GPS antenna, The position is specified by analyzing the satellite position and clock information included in the signal. At least four GPS satellites are required. The single positioning accuracy of GPS is generally over 10 m, but it is improved to 5 m or less by adopting DGPS (Differential GPS). In particular, a positioning unit that is currently installed only in some mobile phones, for example, a GPS receiver that receives a signal from a GPS (Global Positioning System) satellite and performs positioning, is called the third generation. Mobile phones tend to be installed in all models.

  In recent years, the performance of mobile communication terminal devices such as mobile phones and PHS has been dramatically improved, and multi-functionalization has been progressing. In particular, the data communication function is strengthened in addition to the call function, and various data communication services are provided to users via the Internet. Mobile phones with a positioning function have also been realized, and as a technology for use, the in-vehicle navigation device (car navigation system) has been developed, and the communication type for pedestrians that delivers map / route information from the route search server using the mobile phone as a terminal Navigation systems have also been put into practical use.

  For example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-28662) discloses a navigation system using a mobile phone with a GPS function. This navigation system includes means for receiving GPS signals transmitted from a plurality of GPS satellites with a GPS functioning mobile phone having a GPS receiving unit, a GPS control unit, and a GPS antenna built in the mobile phone, and the plurality of GPS signals. Means for packet-transmitting the position information obtained by analyzing the satellite position and the distance information between the satellite receivers and the clock information, and the data such as the telephone number of the mobile phone with GPS function and the search information; A map service having means capable of receiving and detecting the location of the mobile phone with GPS function and the destination and transmitting map data of appropriate scale, map information such as route information and distance to the mobile phone with GPS function A center is arranged.

  Further, the present applicant has already disclosed a navigation system using a mobile phone as a terminal in the following Patent Document 2 (Japanese Patent Laid-Open No. 2003-214860). As shown in FIG. 13, this navigation system is composed of a mobile terminal (mobile phone) 1 and a data communication service center (information distribution computer system) 3 connected to a mobile communication network 2. Connected to the communication service center 3 to receive a desired data communication service. When the mobile terminal 1 is a mobile phone or PHS, a call can be made with a desired partner (a fixed phone, a mobile phone, a PHS, etc.) via the mobile communication network 2 through the mobile communication base station or the telephone line network. it can. The data communication service center 3 is configured to provide a route navigation service in response to a request from the mobile terminal 1 as follows.

  That is, in this navigation system, when a route search request including the position information of the departure place and the destination is issued from the portable terminal 1, the information distribution computer system of the data communication service center 3 uses the road data accumulated in the accumulation means. The optimum route connecting the starting point to the destination is searched for, and the searched route data is temporarily stored in the storage means as guide route data. When display map information specifying the position coordinates and the guide route is requested from the portable terminal 1, the information distribution computer system of the data communication service center 3 displays the map in the vector format around the position coordinates specified by the storage means. Map data and designated guide route data are read out, the guide route data is converted into vector data for drawing a road in a specific color, incorporated into map data, and then sent to the requesting mobile terminal 1 It is.

  Although not shown, the portable terminal 1 is equipped with a GPS receiver for positioning the current position as it moves, and performs GPS positioning at a predetermined cycle. The portable terminal 1 issues a request for display map information to the information distribution computer system of the data communication service center 3 when there is a shortage in display map information as a result of GPS positioning. The information distribution computer system of the data communication service center 3 is provided with storage means for storing road data (map data), landmarks such as buildings on the map, intersection names, road names, and the like. Has been. These data are maintained by acquiring the latest data from the information distribution computer systems 5 and 6 that distribute the map via the Internet 4.

  Map information displayed in a navigation system or car navigation includes map information that covers detailed information of a small area such as a city area from map information that covers a wide area. For example, when using a portable navigation device while moving at high speed in a car In general, map information covering a wide area is used. When a portable navigation device is used while moving on foot, map information covering detailed information of a small area such as an urban area is generally used. The map information covering the wide area is composed of information on railways, main roads, major buildings, etc. The map information covering the city area is in addition to the information on the wide area map, fine roads within the covered area, intersections, stores, etc. Information is added and configured. A plurality of pieces of map information having different contents are referred to as map hierarchies (layers), and an appropriate map is selected from a plurality of maps according to the situation and used.

  Therefore, it is convenient if map information suitable for the usage status of the navigation device can be automatically selected. In order to satisfy such a requirement, for example, there is a mobile navigation device disclosed in Patent Document 3 (Japanese Patent Laid-Open No. 2002-5670). The navigation device for a moving body includes a map center provided with map information storage means for accumulating and managing a plurality of scale map information and map information search means for extracting necessary map information from the map information storage means. Is for transmitting the moving speed and current position information detected by the moving speed detecting means and the current position detecting means to the map center. Then, the map center extracts map information of the corresponding scale from the map information storage means from the current position information and the moving speed received from the navigation apparatus, and transmits the map information to the navigation apparatus. The map information received from the map center is displayed on the monitor together with the current position.

  Moreover, although it is not a communication-type navigation system by a navigation apparatus and a map center like the said patent document 3, the vehicle-mounted navigation apparatus which displays the map based on the road data corresponding according to speed is the following patent document 4 (patent No. 2,782,760). In this navigation device, the position detection means for detecting the current position of the vehicle, the speed detection means for detecting the traveling speed of the vehicle, and the current position detected by the position detection means make the vehicle position mark the center of the display. Is provided with map display means for scroll-displaying the road map. When the amount of information required for scroll display is a predetermined amount or more, if the traveling speed detected by the speed detecting means is a predetermined speed range, a map based on road data corresponding to the speed range is displayed. This is a navigation device that displays the road data separately according to the speed range.

  Furthermore, the following Patent Document 5 (Japanese Patent Laid-Open No. 10-222202) discloses a navigation device for a moving body that displays a map of the periphery at a scale corresponding to the moving speed of the moving body. This navigation apparatus includes position detecting means, speed detecting means, selecting means for selecting a map scale corresponding to the moving speed, map data storing means, arithmetic processing means, display means, and the like. The selecting means selects a map scale corresponding to the moving speed of the moving body detected by the speed detecting means, and the arithmetic processing means is selected by the selecting means based on the map data read from the map data storing means. This is a navigation device that generates map screen display data around the position of the moving body detected by the position detection means and displays the map on the display means at the reduced scale.

Japanese Patent Laying-Open No. 2003-28662 (FIG. 1) Japanese Patent Laying-Open No. 2003-214860 (FIG. 1) Japanese Patent Laying-Open No. 2002-5670 (FIG. 1) Japanese Patent No. 2782760 (FIG. 1) Japanese Patent Laid-Open No. 10-222202 (FIG. 1)

  In a communication type navigation system that uses a mobile phone as disclosed in Patent Document 2 as a navigation terminal and receives distribution of a map and route guidance from a data communication service center, there are various usage modes. . That is, when the user has a mobile phone (mobile navigation terminal) and receives route guidance to the destination by train or on foot, the user receives route guidance to the destination while moving by car, or It is assumed that the usage method varies depending on the situation, such as when the user receives distribution of map data while riding on a high-speed moving means such as the Shinkansen.

A general navigation apparatus has a function of zooming in / out a map (zoom function) and a function of scrolling a displayed map. In addition, these functions can be operated automatically or manually by selecting an automatic mode in which these functions are automatically operated and a manual mode in which these functions are operated by a user operation. Devices have also been proposed.
In the auto scroll, the display map is scroll-controlled so that the current position of the navigation device is at the center of the display screen, and in the manual scroll, the display map is scroll-controlled based on the direction and the scroll amount instructed from the operation unit. In the auto zoom, a map having an appropriate size corresponding to the moving speed of the navigation device is selected. In the manual zoom, a display map is selected based on the zoom amount instructed from the operation unit.

  Therefore, in a communication-type navigation system that receives distribution of map information from a route search server, new display map data is required depending on the moving speed and / or current position of the navigation device by operating the zoom function and scroll function. In such a case, it is necessary to receive map data from the route search server and display the map.

As mentioned earlier, when the mobile navigation terminal is moving fast, use a map of a wide area, and when the moving speed is slow, such as walking, use a map with a high density in the urban area to It is preferable to display the current location. Therefore, as in the navigation systems disclosed in Patent Documents 3 to 5, it is convenient that the configuration can select and display an appropriate map corresponding to the moving speed of the navigation device (mobile terminal device). is there.
However, in the case of adopting a configuration in which the map to be displayed is automatically switched corresponding to the moving speed as in the navigation devices disclosed in these patent documents, the following inconvenience occurs.

  For example, when you get a route search and route guidance by riding a mobile terminal device in a car, it is manually selected to display a detailed (high density) city map, and if the auto scroll function is working, display it When there are not enough maps, a map request is automatically made to the route search server. If such a map request is made from a large number of automobiles in a congested urban area, the map distribution load of the route search server increases, and if the number of users is large, processing on the route search server side cannot catch up. This also causes a problem that the communication load of the network becomes excessive. As a result, the map distribution speed is reduced and the service to the user is reduced.

  That is, the present invention aims to solve the above problems, and when there is a route search request for an automobile using a mobile terminal device, automatic scrolling of the map display is prohibited until guidance is started. After the start of guidance, the inventors have conceived that the above problems can be solved if the use of map data such as a detailed city map is restricted, and the present invention has been completed.

  That is, the present application relates to a navigation system using a mobile terminal device, which restricts the use of a city map in the case of car guidance so that the map distribution load of the route search server and the communication load of the network are not excessive. An object of the present invention is to provide a mobile terminal device and a map display method.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
A portable terminal device having positioning means having a GPS receiver and a display means for displaying a map, and a route from the departure point to the destination based on route search conditions, connected to the portable terminal device via communication means And searching for any kind of map data requested by the mobile terminal device from a plurality of different types of map data consisting of a high-density type map and a low-density type map, and guidance route data. A navigation system comprising a route search server for delivering to a terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile The map selection control means prohibits the use of a high-density type map and displays a map using a low-density type map rather than the high-density type map. To do.

The invention according to claim 2 of the present application is the invention according to claim 1,
The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. When the map display is performed using the map data, the map data request / acquisition unit does not request the route search server to distribute the high-density map data.

The invention according to claim 3 of the present application is the invention according to claim 1 or claim 2,
The portable terminal device further includes an auto scroll means, and when the zoom means or the scroll means performs a manual scroll operation, and the auto scroll means stops, the map selection control means has the high-density map type. It is characterized by permitting selection.

The invention according to claim 4 of the present application is
Based on the route search conditions, the route from the departure point to the destination is searched, and any of the different types of map data consisting of a high-density type map and a low-density type map requested by the mobile terminal device. Map data of this kind, a route search server for delivering guidance route data to the portable terminal device, a positioning means connected via a communication means and having a GPS receiver, and a display means for displaying a map. A portable terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile The map selection control means prohibits the use of a high-density type map and displays a map using a low-density type map rather than the high-density type map. To do.

The invention according to claim 5 of the present application is the invention according to claim 4 ,
The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. When the map display is performed using the map data, the map data request / acquisition unit does not request the route search server to distribute the high-density map data.

The invention according to claim 6 of the present application is the invention according to claim 4 or claim 5 ,
The portable terminal device further includes an auto scroll means, and when the zoom means or the scroll means performs a manual scroll operation, and the auto scroll means stops, the map selection control means has the high-density map type. It is characterized by permitting selection.

The invention according to claim 7 of the present application is
Based on the route search conditions, the route from the departure point to the destination is searched, and any of the different types of map data consisting of a high-density type map and a low-density type map requested by the mobile terminal device. Map data of this kind, a route search server for delivering guidance route data to the portable terminal device, a positioning means connected via a communication means and having a GPS receiver, and a display means for displaying a map. A map display method in a portable terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile detecting a case where the route search condition detecting means detects that the route guidance for the route search you moving means and automobiles, the map selection control means prohibits the use of high type of map density And a step of displaying a map using a map of a lower density type than the map of a higher density type.

The invention according to claim 8 of the present application is the invention according to claim 7 ,
The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. When the map display is performed using the map data, the map data request / acquisition unit includes a process of not requesting the route search server to distribute the high-density map data.

The invention according to claim 9 of the present application is the invention according to claim 7 or claim 8 ,
The portable terminal device further includes an auto scroll means, and the map display method further performs a manual scroll operation by the zoom means or the scroll means, and the map selection control means when the auto scroll means stops. Has a step of permitting selection of the high-density map.

In the invention according to claim 1, the mobile terminal device includes a zoom means for selecting a map type, a scroll means for scrolling the map, and an operation unit for inputting a route search condition including a starting point, a destination, and a moving means. When the route search condition detecting means for detecting that the moving means from the input result of the route search condition is an automobile, and a map selection control means, wherein the route search condition detecting means you moving means and automobile When it is detected that the route guidance is route guidance, the map selection control means prohibits the use of a high-density type map and uses a low-density type map rather than the high-density type map. Perform map display.
Therefore, even if there are map requests from a large number of cars in a congested urban area, the map that is permitted to be used is large enough to prevent the map requests from being frequently generated.

Further, in the invention according to claim 2, in the navigation system according to claim 1, the mobile terminal device further includes a map data request / acquisition unit, and the map selection control means uses a map of a high-density type. The map data request / acquisition unit sends a map of the high density type to the route search server when the map display is performed using a map of a lower density type than the high density type map. Do not request data distribution.
Therefore, even if there are map requests from a large number of cars in a congested urban area, the map that is permitted to be used is large enough to prevent the map requests from being frequently generated. For this reason, the map distribution load of the route search server 20 does not increase, and the communication load does not become excessive.

Moreover, in the invention concerning Claim 3, in the navigation system concerning Claim 1 or Claim 2, the said portable terminal device is further provided with an auto scroll means, and performs a manual scroll operation by the said zoom means or a scroll means, When the automatic scroll means stops, the map selection control means permits selection of the high-density type map.
In manual scrolling, the map is not stopped and a new map request is not made to the route search server, and even if the use of a detailed city map is permitted, the load of map distribution and communication load are not increased.

The invention according to any one of Claims 4 to 6, it is possible to provide a portable terminal device constituting the respective navigation system according to claims 1 to 3. Moreover, in the invention concerning Claim 7 -Claim 9 , the map display method in the portable terminal device concerning Claim 4 -Claim 6 can be provided now, respectively.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. FIG. 1 is a block diagram showing a configuration of a navigation system according to an embodiment of the present invention. In the navigation system of FIG. 1, a mobile phone is used as a mobile end device to perform route search and route guidance for automobiles and pedestrians. For example, navigation for an automobile is an operation of a mobile terminal device. This is a usage method in which a passenger who rides in a passenger seat, receives a route search and route guidance service using the moving means as a car, and the passenger in the passenger seat navigates the driver.

  In the navigation system according to the embodiment of the present invention, as shown in FIG. 1, a route search server 20 and a mobile terminal device 10 are connected via a network 12, and a route search condition is transmitted from the mobile terminal device 10 to the route search server 20. (Moving means, departure place, destination, etc.) is transmitted, and the route search server 20 is configured to search for an optimum route based on route search conditions and distribute it to the mobile terminal device 10.

  The mobile terminal device 10 according to the embodiment of the present invention includes a GPS receiving unit 102 that receives a GPS signal from a GPS satellite 14 and a communication unit 101 for communicating with the route search server 20 via the Internet network 12. The mobile terminal device 10 is specifically composed of a mobile phone, and the communication unit 101 is configured to perform wireless communication with a mobile phone base station in addition to packet communication via the Internet network 12.

  The mobile terminal device 10 includes a main control unit 107 that is configured by a microcomputer or the like and controls the operation of each unit. The GPS reception unit 102 receives a GPS satellite signal, and based on this, the current position calculation unit 103 determines the current position. Calculate the position. The current position information of the mobile terminal device calculated by the current position calculation unit 103 is sent to the route search server 20 via the communication unit 101. In addition, the mobile terminal device 10 includes an operation unit 16, and is configured to operate the operation unit 16 to input information on a departure place and a destination and send a route guidance (navigation) request to the route search server 20. Has been. The route search condition includes a moving means, and is specified by inputting or selecting another such as a car or a walk.

  The route search server 20 includes a map data distribution unit 22, a map data storage unit 24, and a route search unit 26. Based on information on the departure point, destination, and current position transmitted from the mobile terminal device 10, the route search server 20 The search unit 26 performs a route search from the departure point to the destination, reads map data including the current position from the map data storage unit 24, embeds the guide route data searched by the route search unit 26 in the map data, and distributes the map data Delivered to the mobile terminal device 10 by the unit 20. The mobile terminal device 10 receives map data (including route guidance data) distributed from the route search server 20 via the communication unit 101 and the map data request / acquisition unit 105 and stores the map data in the map data storage unit 106. The display control unit 111 reads the map data stored in the map data storage unit 106 and performs control for displaying the map on the display unit 112.

  The mobile terminal device 10 includes speed detection means 104 and detects the moving speed of the mobile terminal device 10. The moving speed of the mobile terminal device 10 can be detected, for example, by obtaining an average moving speed of the mobile terminal device 10 between two points acquired from the GPS system, or an acceleration sensor is provided in the mobile terminal device 10. It can be detected by integrating the output of the acceleration sensor. The moving speed detected by the speed detecting means 104 is sent to the map data request / acquisition unit 105, and the map data request / acquisition unit 105 requests the route search server 20 to acquire map data corresponding to the moving speed. The association between the moving speed and the map requested to the route search server 20 can be easily performed by, for example, the map data management table shown in FIG. 2 in which the speed range and the map data type (wide area map to city map) are tabulated.

  FIG. 2 is a diagram showing the configuration of a map data management table that stores the correspondence between the map type and the moving speed range. For the four-level map data of the city map 1 that is a high-type map, it stores which type of map data the corresponding map data becomes when the moving speed of the mobile terminal device 10 is in which speed range. is there. In the case of the map data management table shown in FIG. 2, when the moving speed of the mobile terminal device 10 is 100 km / h or more, the wide area map 1 is selected, and when the moving speed is 60 km / h or more and 100 km or less, the medium band map 1 is selected. The detailed map 1 is selected when the speed is 20 km or more and 60 km or less, and the city map 1 is selected when the speed is 20 km or less. Therefore, the map data request / acquisition unit 105 may determine the corresponding map data type by referring to the map data management table based on the moving speed, and transmit the map data type to the route search server.

  The operation unit 16 includes an auto zoom unit 108 for zooming (enlarging or reducing) the map displayed on the display unit 112 and an auto unit for automatically scrolling the map to maintain the current position at the center of the display screen. The auto button 161 for enabling the scroll means 109 and the instruction based on the operation of the auto button 161 are invalidated, the map displayed on the display means is stopped regardless of the moving speed, and the zooming in (manual) is manually performed. ), A zoom-in button 162 for zooming out (reducing), a zoom-out button 163, and manual scroll means 164 (up / down / left / right arrow keys) for switching to manual scrolling (manual).

  These buttons and keys are for operating the map displayed on the display means 112. For example, when the auto button 161 is operated, the auto zoom means 108 and the auto scroll means 109 are enabled, and the portable A map corresponding to the moving speed of the terminal device is selected and displayed on the display means 112, and the map is automatically scrolled and displayed so that the current position of the mobile terminal device is located at the center of the screen of the display means 112.

  The zoom-in button 162 and the zoom-out button 163 are manual operation buttons for enlarging or reducing the map displayed on the display unit 112. Further, the up / down / left / right keys indicated by reference numeral 164 have a function of a manual scroll operation and constitute a manual scroll means. When this key is operated, the map displayed on the display means 112 is scrolled in a direction corresponding to the operated key.

  FIG. 3 is a diagram illustrating a screen transition from a menu screen displayed on the mobile terminal device 10 when the route search server 20 searches for a route, distributes a guide route or map data to the mobile terminal device 10 and provides guidance. is there. On the screen 1, “route guidance start”, “route map confirmation”, and “route character guidance” are displayed as menus that the route search is completed and the mobile terminal device 10 selects. When the start of route guidance is selected, screen 2 is displayed in a pop-up. Attention is given to the fact that the use of mobile phones while driving is prohibited by law. A message such as where the responsibility is is displayed, and the user selects either “confirm and use” or “return without using”.

  When the user selects “confirm and use”, a map, a guide route, a current position, and the like are displayed on the display unit 112, and route guide (route guide) is started. At this time, auto-scrolling is the default map display mode.

  Accordingly, when the user operates the zoom-in button 162 to select the city map 1 of the hierarchy D shown in FIG. 2 and performs map display, and the auto scroll means 109 is enabled, the mobile terminal device 10 is In the case of using the route guidance for automobiles, the map being displayed is insufficient due to the movement, and the distribution request for the city map 1 is frequently sent to the route search server 20, and the route search server It is necessary to distribute the insufficient map data requested from the mobile terminal device 10.

  As described above, if there are many automobiles using route guidance in the above-described state in a congested urban area, the frequency of map distribution requests from each mobile terminal device 10 to the route search server 20 is increased. There is a possibility that the processing of the route search server 20 will not be able to keep up, and the communication load on the network between the route search server 10 and each mobile terminal device 10 becomes excessive. For this reason, the speed of map delivery becomes slow and the problem that service falls arises.

  The portable terminal device 10 includes a route search condition / operation state detection unit 171 and a map selection control unit 170 in order to cope with such a problem. The route search condition / operation state detection means 171 detects that the moving means is an automobile from the input result of the route search condition, and detects that the route search request is transmitted to the route search server 20 and the route guidance is started. Based on this detection result, the map selection control means 170 changes the map to the city map 1 (see the hierarchy D in FIG. 2) even if the zoom-in button 162 that is a manual operation button is operated. Is controlled so that only the map can be selected in the hierarchy of the wide area map 1 to the detailed map 1. That is, when the map change prohibiting means 110 operates under the above-described conditions, only the map in the hierarchy of the detailed diagram 1 or higher is handled by auto scroll or auto zoom.

  When the route guidance for the automobile is requested by such control, the route guidance is started, and the user operates the zoom-in button 162 in the state where the auto scroll means 109 is validated, as shown in FIG. Even if an attempt is made to select the city map 1 of the level D shown, use of the city map 1 is prohibited by the map selection control means 170, and only the selection of the map of the level higher than the detailed map 1 is permitted. Therefore, even if there are map requests from a large number of cars in a congested urban area, the map that is permitted to use is large in size, so map requests do not occur frequently, and the map distribution load of the route search server 20 Does not increase, and the communication load does not become excessive.

  In the mobile terminal device 10, the up / down / left / right key (manual scroll means 164), the zoom-in button 162, the zoom-out button 163, etc. have the function of a map stop button at the same time. Regardless of the moving speed of the portable terminal device, switching to a map corresponding to the speed is prohibited by the map change prohibiting means 110. When the zoom-in button 162 or the zoom-out button 163 is operated, the auto-zoom means 108 and the auto-scroll means 109 are invalidated, the map change prohibiting means 110 is activated, and is related to the current position of the mobile terminal device 10. The map displayed on the display means 112 at the time when the map stop operation is performed, or an enlarged map or a reduced map within the mesh range of the map is displayed, and the current position of the mobile terminal device changes even if the current position changes. Control is performed so as not to change to new map data including a position, and control is performed so that a new map data distribution request is not generated by auto or manual scroll processing.

  The user uses the portable terminal device 10 while operating on the high-speed moving means such as the Shinkansen and operates the auto button 161 to receive the distribution of the map data and the route data of the current position from the route search server 20. When a map is displayed and a building or the like that is interested in the moving car window is discovered and you want to zoom in on the map data at that point and observe the map in detail, the zoom in button 162, zoom out button 163 or manual When a map stop button such as the scroll means 164 is operated, the map change prohibiting means 110 is activated, and the change of the map being displayed on the display means 112 is prohibited. Accordingly, the user can fix the map data at the position in the middle of movement and display it on the display means 112 for observation while moving.

  The map data stored in the map data storage unit 24 of the route search server 20 is created in a vector format. In general, map data may be created in a bitmap format or a vector format. If the map data content is the same and the map is simply reduced or enlarged, the map data created in the bitmap format must be created in advance with the desired reduction ratio, bitmap data reduced and enlarged at the enlargement ratio. It is necessary to keep. For this reason, in addition to the map data of each layer, map data that has been reduced and enlarged is created in advance. On the other hand, the map data created in the vector format can be easily scaled by calculating the desired length of each element vector constituting the map by the reduction ratio and the enlargement ratio. Based on map data of a certain hierarchy, map data scaled to different reduction ratios and enlargement ratios can be obtained.

  Therefore, as shown in the map data management table of FIG. 2, the route search server 20 has different amounts of information such as the wide area map 1, the middle area map 1, the detailed map 1, and the city map 1, that is, Different types of map data of four layers (A to D) may be stored, and the map data may be distributed from the route search server 20 to the mobile terminal device 10 when map data of different layers is required. On the mobile terminal device 10 side, map data that is easily enlarged or reduced can be generated by performing a reduction or enlargement calculation at a predetermined ratio from the distributed map data. That is, map data enlarged and reduced at a predetermined ratio from map data in a certain hierarchy can be easily created. For example, the map data of the wide area map 2 and the wide area map 3 enlarged at a predetermined ratio from the map data of the wide area map 1 of the hierarchy A can be created. The same applies to map data at other levels. Thereby, the communication load of the map data between the route search server 20 and the portable terminal device 10 can be reduced.

  For this reason, the mobile terminal device 10 includes map data enlargement / reduction processing means 115. The map data enlargement / reduction processing means 115 enlarges / reduces the wide area map 1 to the city map 1 of each hierarchy A to D shown in the map management table of FIG. 2, and further maps as shown in the map data management table shown in FIG. , And set the hysteresis, auto zoom, and auto scroll for each, and change the type of map to be displayed.

  That is, FIG. 4 shows the configuration of the map data management table similar to that in FIG. The map data stored in the map data storage unit 24 of the route search server 20 is map data created in a vector format, and includes four different layers (A to D), that is, different information from a wide area map to a city map. This is map data composed. For example, the map data storage unit 24 stores only four map data of the wide area map 1, the mid area map 1, the detailed map 1, and the city map 1. The other wide area map 2 to the city map 2, the detailed map 3, and the city map 3 are obtained from the map data (vector data) of the wide area map 1 to the city map 1 by the map data expansion / contraction processing means 115 (see FIG. 3) of the mobile terminal device 10. ) To create a scaling process at a predetermined scaling ratio. Therefore, the communication of the map data between the route search server 20 and the mobile terminal device 10 may be performed only when a map having a different hierarchy is required, and the communication load can be reduced.

  Correspondence with the moving speed of the mobile terminal device 10 is set in the auto zoom factor moving speed column for each map type from the wide area map 1 to the city map 3. For example, the wide area map 1 is set to 200 km / h or more. When the map is switched according to the moving speed according to this setting, when the moving speed repeatedly increases or decreases before and after the switching threshold value, the displayed map frequently changes and is difficult to observe, Increases communication load. For example, the mid-range diagram 1 is displayed at a speed of 100 km / h, but is switched to the wide-area diagram 2 at a speed of 101 km / h. At this time, the map data of the wide area map 1 is distributed from the route search server to the mobile terminal device 10, and the map data of the wide area map 2 is created from this map data. When the speed is reduced to 99 km, the operation is switched to the middle region FIG. 1. At this time, the map data of the middle region FIG. 1 or the mobile terminal device 10 is distributed from the route search server. Therefore, when the moving speed frequently changes around 100 km / h, the map is switched each time, and communication of map data may be required.

  Therefore, in the map data management table of FIG. 4, as shown in the hysteresis setting column 42, a threshold value when the moving speed is switched in the increasing direction and a threshold value when the moving speed is switched in the decreasing direction as shown in the hysteresis setting column 42. Are set differently. For example, in the detailed diagram 1 and the mid-range diagram 2, when the moving speed is increasing, when the speed exceeds 100 km / h, the detailed diagram 1 is switched to the mid-range diagram 2, and when the speed exceeds 120 km / hr, the mid-range diagram 2 is selected. When the moving speed is in the decreasing direction, it is set so that when it falls below 80 km / h, it switches from mid-range figure 2 to detailed figure 1 and when it falls below 60 km / h, it switches from detailed figure 1 to detailed figure 2. ing.

  The map data management table 114 also includes an auto zoom setting storage unit (auto zoom setting storage unit) 44 for setting whether or not each map is a target of auto zoom processing in the auto zoom unit 108, and auto scroll unit. An auto-scroll setting storage unit (auto-scroll setting storage unit) 46 for setting whether or not to perform auto-scroll processing in 109 is provided, and is set by the user from the zoom / scroll setting unit 166 of the operation unit 16. be able to. Therefore, the user can arbitrarily set a map to be subjected to zoom processing and scroll processing in auto zoom and auto scroll.

  For example, the auto-zoom setting storage unit 44 in FIG. 4 is set so that the mid-range diagram 1, the detailed diagram 1, the detailed diagram 3, and the city map 2 are subject to auto-zoom processing, and the auto-zoom processing is set. This is done for the map data. Similarly, the auto-scroll setting storage unit 46 is set so that the wide-area map 1 to the city map 1 are targets of auto-scroll processing, and the auto-scroll processing is performed on the set map. This auto scroll setting is also used when the mobile navigation terminal 10 stops the map while moving.

Here, the meanings of the “valid” and “invalid” settings in the auto scroll setting storage unit 46 of FIG. 4 will be described. This setting means where the auto scroll unit 109 is stopped when the manual scroll unit 164 (up / down / left / right key) is not touched and only the zoom-in button 162 is operated. When the map is enlarged to the map set as “invalid” in the scroll setting storage unit 46, the auto scroll means 109 becomes invalid (OFF) (step S114). That is, in the mobile terminal device 10 according to the present invention, the manual scroll means 164 (up / down / left / right key) is pressed a little to stop the map, and then the zoom-in button 162 is operated to enlarge the map. Further, even a person unfamiliar with the operation can disable the auto scroll means 109 and stop the map by operating only the zoom-in button 162.

  The operation unit 16 is provided with a zoom-in button 162 and a zoom-out button 163 that are manual zooming means for manually zooming in (enlarging) and zooming out (reducing) the map displayed on the display unit 112. It has been. By operating the zoom-in button 162 and the zoom-out button 163, the auto-zoom means 108 is stopped, the map displayed on the display means 112 is stopped regardless of the moving speed, and thereafter, the zoom-in button 162 and the zoom-out button 163 The map can be manually enlarged or reduced by operation.

  Similarly to the zoom-in button 162 and the zoom-out button 163, the manual scroll unit 164 (with the function of stopping the map displayed on the display unit 112 and the function of switching to manual scroll (manual) regardless of the moving speed) Up / down / left / right arrow keys) are provided. Further, a clear button 165 for returning to the auto scroll operation is provided. The zoom / scroll setting means 166 is an operation unit for setting whether or not to make an auto zoom display target for each map and whether or not to make an auto scroll display target for each map.

  When the zoom-in button 162 or the zoom-out button 163 (manual zoom means) is operated, the auto-zoom means 108 is invalidated, and each time the button is operated, the map is switched to a map reduced or enlarged by one step and displayed on the display means 112. Display is performed. When there is no further reduced or enlarged map, when the zoom-in button 162 or the zoom-out button 163 is operated again, the automatic zoom means 108 is returned to the effective state.

  When the manual scroll means 164 is operated when the zoom in button 162 or the zoom out button 163 is not operated, both the auto scroll means 109 and the auto zoom means 108 are invalidated, and the map change prohibiting means 110 is valid. The map displayed on the display unit 112 is fixed when the manual scroll unit 164 is operated. Thereafter, scrolling can be performed by operating the manual scroll means 164, but scroll processing that requires map data of a new area is prohibited by the map change prohibiting means 110.

  For example, a map (wide area diagram 1) corresponding to the moving speed is displayed on the display means 112 during high-speed movement on the Shinkansen, and the display is automatically switched to the destination wide area map 1 by the auto zoom means along with the movement. If the user is interested in a building or the like at a certain point and wants to stop the map and zoom in on a detailed map or a city map, the zoom-in button 162, zoom-out button 163, or manual scrolling means 164 is operated, the map is temporarily stopped in the wide area map 1 displayed at that time, and then the zoom-in means 162 is operated to switch the display to the middle area map, the detailed map, and the city map.

  When returning from this state, the auto scroll means 109 is returned to an effective state by operating the clear button 165 while the manual scroll means 164 is not operated.

  FIG. 5 is a diagram illustrating an appearance of the operation unit 16 of the mobile terminal device 10 (mobile phone). As shown in FIG. 5, the mobile terminal device 10 is provided with zoom-in buttons 162 (manual zooming means) and zoom-out buttons 163 (manual zooming means) that are buttons for manually zooming in, on the upper left and right of the button group. Manual scroll means 164 (up / down / left / right keys) is provided at the upper center. The zoom-in button 162, the zoom-out button 163, and the manual scroll means 164 have a function as a map stop button for stopping the map as described above. FIG. 6 is a diagram illustrating an example of a map displayed on the display screen of the mobile terminal device 10. As shown in FIG. 6, a city map is displayed on the display screen, route guidance (navigation) is displayed, and it is displayed that each button of the zoom-in button and the zoom-out button is set downward and left and right. ing. The basic configuration of the operation unit and the configuration of the display screen can be variously modified and changed as necessary.

  Next, the operation procedure of the mobile terminal device 10 according to the embodiment of the present invention will be described with reference to the flowchart of FIG. FIG. 7 is a flowchart showing an operation procedure of the present invention for restricting the use of a city map in route guidance using an automobile as a moving means. In this flowchart, the mobile terminal device 10 requests a route search to the route search server 20 using the automobile as a moving means and uses the destination as a route search condition, and the route search server 20 carries the guide route as a result of the route search. It is a flowchart which shows the process for 1 cycle of the display control which is delivered to the terminal device 10, and route guidance is started by the process of step S100, and a map display is made on the display means 112.

  First, it is checked whether or not the scroll operation is performed in the process of step S101. If the scroll operation is not performed, it is checked whether or not the auto scroll mode is operating in the process of step S102. Immediately after the start of guidance, the auto scroll state is entered, so the process proceeds to step S103 to check whether the zoom-in button 162 has been operated. If the zoom-in button 162 has been operated, the process proceeds to map selection processing in step S104.

  The state in step S104 is a state in which auto scrolling is enabled and a zoom-in button, that is, a more detailed hierarchical map is requested, and the use of the city map is prohibited. That is, in this map selection process, the use of the city map is prohibited by the map selection control means 170, the wide area map 1 to the detailed map 1 are displayed as options on the display screen, and the display that the city map 1 cannot be selected is displayed. The When there is a selection input in the process of step S105, the map is switched to the map selected in the process of step S106, and map drawing is performed in the process of step S114. If there is no corresponding map data in the mobile terminal device 10, a map request is sent from the map data request / acquisition unit 105 to the route search server.

  FIG. 8 is a diagram showing an example of a map selection screen displayed on the display means 112 during the map selection process in step 105. From the center of the display screen, the wide area map 1 to the detailed map 3 are displayed as options, and the user can select a map at a desired scale by moving the cursor up and down by operating the zoom-in button 162 and the zoom-out button 163. There is no display of a choice of a city map as an option on the screen, and a display that the city map cannot be selected during route guidance is displayed on the screen.

  If there is no scroll operation in the processing from step S101 to step S103, and auto-scroll is on and there is no zoom-in operation, map drawing by auto-scroll is performed in the processing in step S114.

  When the scroll operation is detected in the process of step S101, the process proceeds to the process of step S107 and the auto scroll is turned off. In the process of step S108, the enlargement, reduction, and scroll processes corresponding to the key operation (button operation) of the operation unit are performed. Is called. At this time, since the map display is already in the manual scroll mode (auto-scroll is off), the map selection control unit 170 permits the use of the city map by the operation of the zoom-in button 162 (not prohibited). This is because, in manual scrolling, the map is stopped and a new map request is not made to the route search server 20, and even if the use of a detailed city map is permitted, the load of map distribution and the communication load can be increased. Because there is no.

  Since the use of the city map is permitted in the process of step S108, the city map can be selected by the enlargement / reduction process. If a detailed city map is selected, it is possible to check and confirm a place of interest (POI) along the road.

  To return to the auto scroll mode after entering this processing procedure, the clear button 165 is operated in the processing of step S109. When the operation of the clear button 165 is detected in the process of step S109, it is checked whether or not a city map is selected in the process of step S110. If the city map is selected here, the use of the city map is prohibited by the map selection control means 170 in the auto scrolling as described above. If the change to the detailed map is possible, the route guidance using the detailed map is returned in the process of step S112, and the auto scroll is turned on in the process of step S113 to return to the auto scroll mode. Thereafter, the map drawing process of step S114 is performed in the auto scroll mode.

  The transition of the screen displayed on the display means during this period is shown in FIG. In the process of step 108, it is assumed that the display state of the detailed map shown in the screen 1 of FIG. If the clear button 165 is operated in the process of step S109 in this state, the state returns to the auto scroll state. At that time, since the city map is displayed, the display of the city map is detected in the process of step S110.

  Since the use of the city map is prohibited when returning to the auto scroll, the display shown in the screen 3 of FIG. 9 is performed in the process of step S111, and a confirmation screen for changing from the city map to the detailed map is displayed. When the user agrees to change to the detailed map on this confirmation screen, auto-scrolling is turned on in step S113, and the display is changed to a detailed view as shown in screen 4. If the change to the detailed view is not agreed, the process returns to the detection of the clear button operation in step S109 without returning to the auto scroll.

  If the operation of the clear button 165 is not detected in the process of step S109, the process returns to the map drawing of step S114, and if the city map is not selected in the process of step S110, the processes of steps S111 and S112 are skipped. In the process of step S113, the auto scroll is turned on and the process returns to the auto scroll mode. If it is not possible to change to the detailed map in the process of step S111, the process returns to step 109. In this case, as a result, the process of returning to the auto scroll mode is not performed.

  In this way, the route guidance advances, and when the destination or a predetermined distance from the destination is reached, the voice guidance “Soon, it is a destination. In a general navigation system, even after reaching the destination, the user may continue to move in order to search for a nearby location of interest (Point of Interest: hereinafter simply referred to as POI). In addition, the destination is a theme park, which may move within the theme park. For this reason, even if the route guidance is finished, the current position display and the map display are continued. Therefore, the mobile terminal device 10 periodically performs the current position measurement using GPS, and if the map near the current position is insufficient, the mobile terminal device 10 requests the route search server 20 to distribute the map.

  When route guidance for automobiles is used, the travel distance after reaching the destination may be considerably longer than walking. Even if the mobile terminal device 10 reaches the destination, the current position positioning is continued, and if the map distribution request is continuously sent to the route search server by the subsequent movement, the map distribution load of the route search server 20 is increased. In order to deal with such a case, the route search condition / operation state detection unit 171 stops the current position positioning operation of the GPS reception unit 102 when detecting arrival at the destination. As a method of stopping the GPS receiving unit 102, it is preferable to take means for stopping the power supply of the GPS receiving unit 102.

  By doing so, a map download request is not generated, the map distribution load of the route search server 20 is reduced, and the network communication load is also reduced. Further, if the operation of the GPS receiving unit 102 is stopped or the power supply is stopped, the current consumption of the GPS receiving unit 102 in the mobile terminal device 10 can also be suppressed. The display on the display means 112 is maintained with the last map displayed until any manual operation is performed on the mobile terminal device 10.

  FIG. 10 is a flowchart showing a map drawing procedure of the mobile terminal device 10 shown in FIG. First, in step S201, it is determined whether or not the auto zoom means 108 is valid (ON or OFF), that is, whether or not auto zoom processing is in progress. If the auto-zoom means 108 is valid (ON), a corresponding map is selected from the moving speed of the mobile terminal device 10 in step S202, and the process proceeds to step S203. The correspondence between the moving speed and the map data is as described in the map data management table of FIG. 4, and the details of the map selection corresponding to the moving speed will be described later in detail using the flowchart shown in FIG. If the auto zoom means 108 is invalid (OFF), the process proceeds to step S203.

  Next, in step S203, it is determined whether or not the auto scroll processing means 109 is valid (ON or OFF), that is, whether or not the auto scroll processing is being performed. When the auto scroll means 109 is valid (ON), an area of the map to be drawn on the display means 112 is set so that the current position is located at the center of the display screen based on the current position information of the mobile terminal device 10 in step S204. Determine and proceed to step S206. When the auto scroll means 109 is invalid (OFF), the designated position designated by the operation of the manual scroll button 164 of the operation unit 16 of the mobile terminal device 10 in step S205 (the point arbitrarily moved by the manual scroll button 164) ) To determine the area of the map to be drawn on the display means 112, and the process proceeds to step S206.

  In step S206, it is determined whether or not the map data determined in step S202 is stored in the map data storage unit 106 of the mobile terminal device 10. If there is no corresponding map data in the map data storage unit 106, the portable terminal device 10 requests and acquires the corresponding map data from the route search server 20 in step S207. If there is map data corresponding to the map data storage unit 106, the map is displayed (drawn) on the display means 112 in step S208 in accordance with the drawing area determined in step S204 or step S205, and the return (one process is completed).

  FIG. 11 is a flowchart showing a map selection procedure of the mobile terminal device 10 shown in FIG. First, in step S301, the moving speed is detected by the speed detecting means 104 of the mobile terminal device 10. In step S301, selection information on the currently selected map is saved. The save destination may be a temporary storage device (not shown) such as a RAM of the main control unit 107. Next, in step S302, it is checked whether the moving speed of the mobile terminal device 10 exceeds the upper limit speed for the currently selected map. For example, if the currently selected map is the city map 2 and the moving speed of the mobile terminal device 10 is 15 km / h or more, the process proceeds to step S303, and the city map 1 that is a one-step reduced map is temporarily stored. select.

  Then, in step S304, it is checked whether or not the temporarily selected city map 1 is subject to auto zoom. This check is performed by referring to the setting of the auto zoom setting storage means shown in FIG. In the example shown in FIG. 4, since the city map 1 is not set as an auto-zoom target, the determination is no and the process returns to step S302 to check the moving speed again. If the moving speed is 25 km / h or more, the detailed diagram 3 is provisionally selected in step S303, and the detailed diagram 3 is set as an auto-zoom target, so the determination is OK, and the map is determined (selected) in step S305. Is done.

  If the moving speed of the mobile terminal device 10 does not exceed the upper limit speed in step S302, the process proceeds to step S306, and it is checked whether it is equal to or lower than the lower limit speed. The process from step S306 of the process for checking the lower limit speed to step S309 of the process for determining the map is the same as the process procedure from step S302 of the process for checking the upper limit speed to step S305 of the process of determining the map.

  If the movement speed is not lower than the lower limit speed in step S306, the process proceeds to step S310, where the saved map selection information is restored and the map is selected. That is, in this case, the map is not switched. Similarly, when the auto zoom setting is not performed on the map corresponding to the moving speed of the mobile terminal device 10, the process jumps to step S <b> 310 to restore the saved map selection information and select the map. Become.

  FIG. 12 is a flowchart illustrating a display mode control procedure in the mobile terminal device 10. In the display mode control, first, in step S401, it is checked whether the zoom-in button 162 or the zoom-out button 163 is operated to enter the manual zoom control mode. If the zoom-in button 162 has been operated, it is checked in step S402 whether the map displayed on the display means 112 is the city map 3 or not. If it is not the city map 3, the displayed map is enlarged by one step in step S405. For example, when the map being displayed is the detailed diagram 3, the map is enlarged to the city map 1. In this case, since the map data has a different hierarchy, the map search server 20 receives distribution of the corresponding map data.

  If the map being displayed in the check in step S402 is the city map 3, since no further enlarged map is prepared, the manual zoom operation is terminated and the auto zoom means 108 and the auto scroll means 109 are enabled in step S108. (ON) to return to the auto zoom / auto scroll display mode.

  When the zoom out button 163 is operated in the check in step S401, it is checked in step S403 whether the map displayed on the display unit 112 is the wide area map 1 or not. If it is not the wide area map 1, the displayed map is reduced by one step in step S406. For example, when the map being displayed is the detailed diagram 1, the map is reduced to the middle region diagram 1. In this case, since the map data has a different hierarchy, the map search server 20 receives distribution of the corresponding map data. In step S409, the auto zoom processing means 108 is disabled (OFF), and the setting in the auto scroll setting storage unit 46 is checked in step S412. In the case of FIG. 1, since the auto scroll setting is “valid” (see FIG. 4), the process ends and the process returns. If “valid” is not set, the automatic scroll processing means 109 is disabled (OFF) in step S414, the process is terminated, and the process returns.

  On the other hand, if the map being displayed in the check in step S403 is the wide area map 1, since no further reduced map is prepared, it is checked in step S407 whether the clear button 165 is operated, and the clear button 165 is If not operated, the process is terminated and the process returns. If the clear button 165 has been operated, the auto scroll means 109 is enabled (ON) in step S410, the process is terminated, and the process returns.

  If neither the zoom-in button 162 nor the zoom-out button 163 has been operated in the check in step S401, or if the manual scroll button 164 has been operated in step S404, the auto-zoom means 108 and the auto-scroll in step S411. The means 109 is disabled (OFF), the map change prohibiting means 110 is activated to stop the map, and the manual scroll process can be performed in step S413.

  Note that when route guidance for an automobile is requested, the route guidance is started, and when the user operates the zoom-in button 162 with the auto scroll means 109 enabled, the above FIG. 11 and the processing procedure of FIG. 7 is applied irrespective of the processing procedure of FIG.

  The present invention is not limited to a pedestrian navigation system using a mobile phone, but can realize a dedicated application as a navigation system for passengers in a passenger seat of an automobile. At the same time, many users use mobile phones. Even if a navigation service is requested, the processing load on the route search server can be reduced, and a system that does not degrade the service can be provided.

It is a block diagram which shows the structure of the portable terminal device concerning the Example of this invention. It is a figure which shows the structure of the map data management table which memorize | stored the correspondence of the classification of a map, and a moving speed range. It is a figure which shows the transition of the menu screen displayed on a portable terminal device at the time of a route guidance start. It is a figure which shows the other structure of a map management table, and the structure of an auto zoom and an auto scroll setting memory | storage part. FIG. 3 is a diagram illustrating an appearance of an operation unit of the mobile terminal device 10. It is a figure of the display image which shows an example of a map display. It is a flowchart which shows the operation | movement procedure of the portable terminal device concerning the Example of this invention which restricts use of a city map in the route guidance which used the motor vehicle as the moving means. It is a figure which shows an example of the map selection display screen at the time of prohibiting selection of a city map. It is a figure which shows the display screen transition displayed in the case of the expansion of the map in manual scroll, reduction, and a scroll process. It is a flowchart which shows the procedure of map drawing. It is a flowchart which shows the procedure of map selection. It is a flowchart which shows the procedure of display mode control. It is a figure which shows the structure of the portable navigation system which used the conventional mobile telephone as a navigation terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Portable terminal device 12 ... Internet network 14 ... GPS satellite 20 ... Path search server 16 ... Operation part 161 ... Auto button 162 ... Zoom-in button (manual zoom means)
163 ..Zoom out button (manual zoom means)
164 ··· Manual scrolling means 165 ·· Clear button 166 ·· Zoom / scroll setting means 101 ·· Communication portion 102 ·· GPS receiving portion 103 ·· Current position calculating means 104 ·· Speed detecting means 105 ·· Map data request / Acquiring unit 106 ・ Map data storage unit 107 ・ Main control unit 108 ・ Auto zooming unit 109 ・ Auto scroll unit 110 ・ Map change prohibiting unit 111 ・ Display control unit 112 ・ Display unit 114 ・ Map data Management table 115... Map data enlargement / reduction processing means 170... Map selection control means 171... Route search condition / operation state detection means 22... Map data distribution unit 24. Part

Claims (9)

A portable terminal device having positioning means having a GPS receiver and a display means for displaying a map, and a route from the departure point to the destination based on route search conditions, connected to the portable terminal device via communication means And searching for any kind of map data requested by the mobile terminal device from a plurality of different types of map data consisting of a high-density type map and a low-density type map, and guidance route data. A navigation system comprising a route search server for delivering to a terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile The map selection control means prohibits the use of a high-density type map and displays a map using a low-density type map rather than the high-density type map. Navigation system.   The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. 2. The navigation according to claim 1, wherein the map data request / acquisition unit does not send a distribution request for the high-density map data to the route search server when the map is displayed using the map. system.   The portable terminal device further includes an auto scroll means, and when the zoom means or the scroll means performs a manual scroll operation, and the auto scroll means stops, the map selection control means has the high-density map type. The navigation system according to claim 1 or 2, wherein the selection is permitted. Based on the route search conditions, the route from the departure point to the destination is searched, and any of the different types of map data consisting of a high-density type map and a low-density type map requested by the mobile terminal device. Map data of this kind, a route search server for delivering guidance route data to the portable terminal device, a positioning means connected via a communication means and having a GPS receiver, and a display means for displaying a map. A portable terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile The map selection control means prohibits the use of a high-density type map and displays a map using a low-density type map rather than the high-density type map. Mobile terminal device. The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. 5. The mobile phone according to claim 4 , wherein the map data request / acquisition unit does not send a distribution request for the high-density map data to the route search server when displaying the map using the map. Terminal device. The portable terminal device further includes an auto scroll means, and when the zoom means or the scroll means performs a manual scroll operation, and the auto scroll means stops, the map selection control means has the high-density map type. the portable terminal device according to claim 4 or claim 5, characterized in that to allow the selection. Based on the route search conditions, the route from the departure point to the destination is searched, and any of the different types of map data consisting of a high-density type map and a low-density type map requested by the mobile terminal device. Map data of this kind, a route search server for delivering guidance route data to the portable terminal device, a positioning means connected via a communication means and having a GPS receiver, and a display means for displaying a map. A map display method in a portable terminal device,
The mobile terminal device includes: a zoom unit that selects a map type; a scroll unit that scrolls the map; an operation unit that inputs a route search condition including a departure point, a destination, and a movement unit; and the input of the route search condition a route search condition detecting means for detecting that results from the movement means is an automobile, and a map selection control means, said route search condition detecting means is a route guidance for the route search you moving means and automobile detecting a case where the route search condition detecting means detects that the route guidance for the route search you moving means and automobiles, the map selection control means prohibits the use of high type of map density And a step of displaying a map using a map of a lower density type than the map of a higher density type. The portable terminal device further includes a map data request / acquisition unit, and the map selection control unit prohibits the use of a map of a high density type, and a map of a lower density type than a map of the higher density type. If the utilizing performing map display, to claim 7, characterized in that it comprises the map data request / acquisition section does not perform distribution request for higher types of map data of the density to the route search server process The map display method described. The portable terminal device further includes an auto scroll means, and the map display method further performs a manual scroll operation by the zoom means or the scroll means, and the map selection control means when the auto scroll means stops. map display method according to claim 7 or claim 8, characterized by having a step of permitting selection of high types of map of the density.

Images