JP2009300245A - Map display system, map display device, and map display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To download underground shopping area maps etc. in time and efficiently change a map when global positioning system does not work well. <P>SOLUTION: The mobile terminal apparatus device 20 determines whether positioning by a positioning means 203 can be carried out; when the positioning by the positioning means 203 is determined to be impossible, determines whether a certain area with a detailed guide map exists around the last positioning position; when the certain area is determined to exist, makes a display means display the certain area in a selectable fashion; determines whether the certain area is selected by an operation input means 205; and when the certain area is determined to be selected, makes a display means 204 display the detail guide map and also display information with regards to the last positioning position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a map display system that displays a predetermined map for a user who moves based on map information stored in a map database. In particular, the present invention can download an underground street map and the like at a timely timing and perform GPS positioning. The present invention relates to a map display system, a map display device, and a map display method configured to efficiently switch maps when there is not.

  In recent years, a map search is performed according to a search condition such as an address or facility name desired by a user or a current position acquired from a GPS signal by a GPS reception function provided in a mobile terminal device, and the map information obtained by the map search is currently A map display service that displays information on a display screen of a mobile terminal device together with a position is known.

  In the navigation service, a route search is performed according to a search condition including a departure point, a destination, and time information desired by the user, a recommended route obtained by the route search is displayed, and a user who moves according to the recommended route is displayed. Thus, predetermined guidance information is displayed in characters, voices, etc. on the terminal device possessed by the user.

  In the display of this guidance information, a communication type navigation system that provides the functions of a conventional in-vehicle navigation system to a mobile terminal device such as a mobile phone is realized in addition to the transfer guidance for transportation such as railway lines. . According to such a system, it is possible to provide a navigation service not only for the driver of the automobile but also for the pedestrian.

  Furthermore, since a pedestrian navigation device requires a service that guides the inside of an underground shopping center or building, there are various techniques for switching to an underground shopping center map or building guide map when entering an underground shopping center or building. Has been proposed.

  For example, a technique for switching and displaying a plurality of types of map information based on terminal location information and instructions from a user is disclosed in the following Patent Document 1 (Japanese Patent Application Laid-Open No. 2007-57857) as “Map information display method and It is disclosed as “Map information distribution method”. This patent document 1 discloses that, when GPS radio waves for detecting position information become weak, underground map information is downloaded, and the display is switched from the ground map information to the underground map information.

  In addition, when performing navigation to a destination with a portable terminal, a technique for switching between two-dimensional display / three-dimensional display based on position information or the like is disclosed in, for example, the following Patent Document 2 (Japanese Patent Laid-Open No. 2007-71848). No. 1) as a “mobile terminal navigation system”. In Patent Document 2, since it is easy to acquire position information by GPS outside the building such as on the road, a three-dimensional guide screen is displayed, and the position information is acquired by GPS by moving inside the building. When it is impossible, it is disclosed that the current position of the user can be easily understood by switching from the three-dimensional display to the two-dimensional display.

  Furthermore, in this patent document 2, guidance for selecting an entrance that has entered the inside of a building is displayed, and detailed information (internal map information, store information) regarding the building at the selected entrance can be displayed. It is disclosed.

JP 2007-57857 A (FIGS. 5 and 6, paragraphs [0069] to [0074]) JP 2007-71848 A (FIGS. 5 and 9, paragraphs [0053] to [0061])

  However, as in the above-mentioned Patent Document 1, there is a case where communication is not established very much when the underground street map is downloaded after the GPS radio wave or the mobile phone communication radio wave becomes weak. In particular, the stairs and elevators at the entrance to the underground shopping area are not good communication areas, and there is a problem that the underground shopping map information cannot be easily downloaded.

  In addition, since the GPS radio wave level is generally not known from the navigation application installed on the mobile phone (navigation app), the underground map information cannot be downloaded when it is found that GPS positioning cannot be performed. It may have become.

  Also, as in Patent Document 2 above, when the GPS inside the building cannot be measured, immediately after the map in the building is switched from a three-dimensional map to a two-dimensional map, the entrance into the building is opened. There is a problem that it is not easy for the user to select.

  As a result of various studies to solve the above problems, the inventor of the present application downloads an underground shopping area map in a timely manner, and when the GPS positioning cannot be performed, the map is switched efficiently and the map is switched. The present invention has been completed by conceiving that the above problem can be solved by displaying the positioning information up to immediately before.

  That is, the present invention has an object to solve the above-described problems, and even when entering an underground shopping street where GPS signals are difficult to reach, a detailed guide map of a spot desired by the user is displayed seamlessly and the user desires. It is an object of the present invention to provide a map display system, a map display device, and a map display method that can prevent mistakes in spot selection.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is
The map distribution server includes a map distribution server and a map display device, and the map distribution server sends map information stored in the map database to the map display device, and a predetermined map for a user who moves based on the map information received by the map display device. A map display system for displaying,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
It is provided with.

  The invention according to claim 2 of the present application is the map display system according to claim 1, wherein the vicinity of the last positioning position is a display range of the map displayed on the display means when the positioning is last performed. It is characterized by.

  The invention according to claim 3 of the present application is characterized in that, in the map display system according to claim 1, the vicinity of the last positioning position is within a predetermined distance range from the positioning position last measured.

  The invention according to claim 4 of the present application is the map display system according to any one of claims 1 to 3, wherein the information related to the last positioning position is a position mark indicating the positioning position last measured. It is characterized by being.

  The invention according to claim 5 of the present application is the map display system according to any one of claims 1 to 4, wherein the information on the last positioning position is a direction indicating a direction of the positioning position last measured. It is a mark.

  The invention according to claim 6 of the present application is the map display system according to any one of claims 1 to 5, wherein the detailed guidance map is a floor plan of an underground shopping center or a building guidance map. To do.

  The invention according to claim 7 of the present application is the map display system according to any one of claims 1 to 6, wherein the display means has been positioned by the positioning means so far when displaying a map. It is characterized by displaying a history of positioning positions.

  The invention according to claim 8 of the present application is the map display system according to any one of claims 1 to 7, wherein when the map including the positioning position is acquired from a map database, the detailed guidance map is simultaneously used. An acquisition means for acquiring is provided.

The invention according to claim 9 of the present application is
A map display device that receives map information stored in a map database from a map distribution server and performs a predetermined map display for a user who moves based on the received map information,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
It is provided with.

  The invention according to claim 10 of the present application is the map display device according to claim 9, wherein the vicinity of the last positioning position is a display range of the map displayed on the display means when the positioning is last performed. It is characterized by.

  The invention according to claim 11 of the present application is characterized in that, in the map display device according to claim 9, the vicinity of the last positioning position is within a predetermined distance range from the positioning position last measured.

  According to a twelfth aspect of the present invention, in the map display device according to any one of the ninth to eleventh aspects, the information related to the last positioning position is a position mark indicating the last positioning position. It is characterized by being.

  According to a thirteenth aspect of the present invention, in the map display device according to any one of the ninth to eleventh aspects, the information relating to the last positioning position is a direction indicating a direction of the last positioning position. It is a mark.

  The invention according to claim 14 of the present application is the map display device according to any one of claims 9 to 13, wherein the detailed guide map is a floor plan of an underground mall or a guide map of a building. To do.

  The invention according to claim 15 of the present application is the map display device according to any one of claims 9 to 14, wherein the display means has been positioned by the positioning means so far when displaying a map. It is characterized by displaying a history of positioning positions.

  The invention according to claim 16 of the present application is the map display device according to any one of claims 9 to 15, wherein when the map including the positioning position is acquired from a map database, the detailed guidance map is simultaneously used. An acquisition means for acquiring is provided.

Furthermore, the invention according to claim 17 of the present application is
A map display method in a map display device that receives map information stored in a map database from a map distribution server and displays a predetermined map for a user who moves based on the received map information,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
With
Determining whether positioning by the positioning means is possible;
When it is determined that positioning by the positioning means is not possible, determining whether there is a specific area having a detailed guidance map around the last positioning position;
When it is determined that there is the specific area, the display means displays the specific area in a selectable manner;
Determining whether the specific area has been selected by the operation input means;
When it is determined that the specific area has been selected, the detailed guidance map is displayed on the display means, and information on the last positioning position is also displayed.
It is characterized by having.

  The invention according to claim 18 of the present application includes the step of displaying a history of positioning positions so far measured by the positioning means when displaying the map on the display means in the map display method according to claim 17. It is characterized by that.

  The invention according to claim 19 of the present application includes the step of acquiring the detailed guidance map simultaneously when acquiring the map including the positioning position from the map database in the map display method according to claim 17 or claim 18. It is characterized by that.

  In the invention according to claim 1, whether or not there is a specific area having a detailed guidance map around the last positioning position when it is determined whether positioning by the positioning means is possible and it is determined that positioning by the positioning means cannot be performed. If it is determined that there is a specific area, the display unit displays the specific area in a selectable manner, determines whether the specific area is selected by the operation input unit, and the specific area is selected. When it is determined that the information has been displayed, the detailed guidance map is displayed on the display means, and information on the last positioning position is also displayed.

  According to such a configuration, even when moving to a place where positioning by the positioning means is not possible, it is possible to seamlessly display a detailed guidance map of a specific area desired by the user around the last positioning position. In addition, since information on the last positioning position is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  According to a second aspect of the present invention, in the map display system according to the first aspect, the vicinity of the last positioning position is a display range of the map displayed on the display means when the positioning is last performed. Configured.

  According to such a configuration, even when moving to a place where positioning by the positioning means cannot be performed, detailed guidance of a specific area desired by the user in the display range of the map displayed on the display means when the positioning was last performed The map can be displayed seamlessly. In addition, since information on the last positioning position is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  According to a third aspect of the present invention, in the map display system according to the first aspect, the vicinity of the last positioning position is configured to be within a predetermined distance range from the last positioning position.

  According to such a configuration, even when moving to a place where positioning by positioning means is not possible, a detailed guidance map of a specific area desired by a user within a predetermined distance range from the positioning position finally positioned is seamlessly obtained. It is possible to display. In addition, since information on the last positioning position is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  According to a fourth aspect of the present invention, in the map display system according to any one of the first to third aspects, the information related to the last positioning position is a position mark indicating the positioning position last measured. It was configured as follows.

  According to such a configuration, even when moving to a place where positioning by the positioning means is not possible, it is possible to seamlessly display a detailed guidance map of a specific area desired by the user around the last positioning position. Further, since the position mark indicating the positioning position measured last is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  In the invention concerning Claim 5, in the map display system concerning any one of Claim 1 thru | or 4, the information regarding the said last positioning position is a direction mark which shows the direction of the positioning position measured last. It was configured to be.

  According to such a configuration, even when moving to a place where positioning by the positioning means is not possible, it is possible to seamlessly display a detailed guidance map of a specific area desired by the user around the last positioning position. In addition, since the direction mark indicating the direction of the positioning position measured last is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  According to a sixth aspect of the present invention, in the map display system according to any one of the first to fifth aspects, the detailed guide map is configured to be a floor plan of an underground mall or a guide map of a building.

  According to such a configuration, even when moving to a place where positioning by positioning means is not possible, it is possible to seamlessly display the underground map or building guide map desired by the user around the last positioning position. Become. In addition, since information related to the last positioning position is also displayed, it is possible to prevent an error in selecting an underground shopping center map or a building guide map desired by the user.

  The map display system according to any one of claims 1 to 6, wherein the display means is a positioning position that has been measured by the positioning means so far when displaying a map. Configured to display the history.

  According to such a configuration, even when moving to a place where positioning by the positioning means is not possible, it is possible to seamlessly display a detailed guidance map of a specific area desired by the user around the last positioning position. In addition, since the history of positioning positions measured by the positioning means is also displayed, it is possible to prevent mistakes in selecting a specific area desired by the user.

  In the invention according to claim 8, in the map display system according to any one of claims 1 to 7, when the map including the positioning position is acquired from a map database, the detailed guidance map is also acquired at the same time. An acquisition unit is provided.

  According to such a configuration, even when moving to a place where positioning by the positioning means is not possible, it is possible to seamlessly display a detailed guidance map of a specific area desired by the user around the last positioning position. In addition, since information on the last positioning position is also displayed, it is possible to prevent an error in selecting a specific area desired by the user.

  Further, in the inventions according to claims 9 to 16, it is possible to provide a map display device constituting the map display system according to claims 1 to 8, respectively, according to claims 17 to 19. In the invention, it is possible to provide a map display method for realizing the map display system according to claims 1 and 7 to 8 respectively.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, in the following embodiments, a navigation system, a map display method, and a portable terminal device for embodying the technical idea of the present invention are illustrated, and the present invention is applied to this navigation system, map display method, and portable device. The present invention is not intended to be specified as a terminal device, and is equally applicable to the map display system, map display method, and map display device of other embodiments included in the scope of claims.

  FIG. 1 is a block diagram showing a configuration of a navigation system 10 including a mobile terminal device 20 according to an embodiment of the present invention. The mobile terminal device 10 according to the embodiment of the present invention can use a mobile phone or the like, and is connected to the map distribution server 30 via the network 12 as shown in FIG. is doing.

  The map distribution server 30 shown in FIG. 1 includes a map database 31 and a route search network database 32. When there is a map search request from the mobile terminal device 20, the map distribution server 30 refers to the map database 31 and stores predetermined locations including the current position. When there is a map search service function for distributing a map and a route search request from the mobile terminal device 20, the route search is performed with reference to the route search network database 32, and a recommended route and its guidance information are transmitted to the mobile terminal device 20. It has a navigation function.

  The route search network database 32 is a database in which road network data for searching for a travel route by foot or car and traffic network data for searching for a travel route using public transportation are accumulated. Specifically, road network data includes roads (routes) as nodes and node points as inflection points, links as links between nodes, node data, link data, and cost information (distance) for all links. Or the required time) and is made into a database. The traffic network data is also stored as link cost data, with stations as nodes, links between stations, and timetable data (departure time, arrival time, required time) for each transportation system such as trains. .

  When there is a route search request in which a route search condition including a departure point, a destination, and time information is set from the mobile terminal device 20, the map distribution server 30 refers to the route search network database 32 from the departure point to the destination. Search for a recommended route including the optimal route. As such a route search method, a method called label determination method or Dijkstra method is used. The map distribution server 30 sends an outline of the searched recommended route to the mobile terminal device 20, and when there is a detailed data distribution request for the recommended route specified by the mobile terminal device 20, the map distribution server 30 is specified with reference to the map database 31. Map information including the recommended route and route guidance data including the guidance information are distributed to the mobile terminal device 20.

  In the route guidance data, guidance points such as a departure point on the recommended route searched by the map distribution server 30, an inflection point of the route, an intersection, a transfer station, and a destination are set, and the position coordinates (latitudes) of these guidance points are set.・ Longitude) and guidance information related to each guidance point (straight and left / right guidance information).

  When receiving the route guidance data from the map distribution server 30, the mobile terminal device 20 starts a predetermined route guidance operation according to the user guidance start instruction, displays the map and the recommended route received from the route search server 30, and displays the user's guidance. Guidance information based on the recommended route is displayed or voiced at the timing of arrival at the guidance point according to the moving position information.

  Here, when the map distribution server 30 distributes the map information including the recommended route to the mobile terminal device 20, the map distribution server 30 stores each predetermined unit map data stored in the map database 31 based on the current position of the mobile terminal device 20. Deliver to.

  The map database 31 stores vector map data composed of mesh unit map data divided by a predetermined latitude range and longitude range. This vector map data includes a wide area map, a middle area map, and details. It is divided into map data of each hierarchy such as figure and city map. Furthermore, in the present invention, detailed guide maps such as underground floor plans and building guide maps are also accumulated.

  The map distribution server 30 reads the map data requested from the mobile terminal device 20 from the map database 31 and distributes the map data to the requesting mobile terminal device 20. Generally, map data for nine unit maps corresponding to meshes in the vertical, horizontal, and diagonal directions is distributed around the current position of the mobile terminal device 20. When the mobile terminal device 20 moves and the map data is insufficient, the map distribution server 30 distributes the shortage of unit map data by determining the moving direction of the mobile terminal device 20.

  The mobile terminal device 20 downloads the map data distributed from the map distribution server 30, but the map distribution server 30 of the present invention reads out the city map and distributes it to the requesting mobile terminal device 20. A detailed guide map such as an underground map of the underground mall and a guide map of the building included in the figure is also read from the map database 31 and distributed. For this reason, in the present invention, a detailed guide map is downloaded simultaneously with the city map by the mobile terminal device 20.

  As shown in FIG. 1, the mobile terminal device 20 includes a control unit 201, a transmission / reception unit 202, a positioning unit 203, a display unit 204, an operation input unit 205, a distribution request unit 206, a distribution data storage unit 207, and a positioning data storage unit 208. , Positioning determination means 209, display control means 210, and the like. The mobile terminal device 20 according to the embodiment of the present invention is a mobile phone, and also has a function of displaying a map of a mobile device such as a PDA, music player, mobile game machine, or mobile personal computer (PC). May be a map display device.

  In the portable terminal device 20, the control unit 201 is a microprocessor having a RAM, a ROM, and a processor (not shown), and controls the operation of each unit by a control program stored in the ROM. The transmission / reception means 202 is an interface for transmitting / receiving communication data to / from the map distribution server 30 or the like via the network 12.

  The positioning means 203 acquires position information by satellite navigation means that receives a signal from a GPS satellite and measures the current position of the mobile terminal device 20 by latitude and longitude. Whether or not the position information (latitude and longitude) can be acquired is used as position data at a timing for displaying a specific area having a floor plan of an underground shopping mall or a guide map of a building in a selectable manner, as will be described later. Moreover, it is transmitted to the map distribution server 30 and can be used when searching map data, displaying map data, and specifying the current position.

  The display means 204 is composed of a liquid crystal display unit or the like, and displays a map delivered from the map delivery server 30. In addition, a menu screen for operating the mobile terminal device 20 is displayed on the display unit 204, and a route search condition or the like can be selected by an operation such as a pull-down menu. Accordingly, the display unit 204 also functions as a part of the operation input unit 205.

  When the map is displayed on the display unit 204, generally, the guide route and the current map display device 20 are displayed on a map of a certain scale and a certain range including the current position of the map display device 20 acquired by the positioning unit 203. A mark indicating the position is superimposed and displayed so that the current position mark is at the center of the display screen. Since the acquired position information includes an error, route matching processing is performed to correct the current position on the guide route when the current position is deviated from the guide route.

  The operation input means 205 is for operation and input consisting of numeric keys, alphabet keys, other function keys, selection keys, scroll keys (up / down / left / right arrow keys), and the like. A desired menu is selected from the displayed menu screen, or various input operations such as setting a route search condition and moving a cursor are performed by operating keys.

  The distribution request unit 206 transmits the distribution request edited based on the route search condition set by the operation of the menu screen displayed on the operation input unit 205 or the display unit 204 to the map distribution server 30 via the transmission / reception unit 202. To do. In addition, when the mobile terminal device 20 is short of map data for moving and displaying, a map data distribution request is also transmitted to the map distribution server 30.

  The distribution data storage means 207 is a memory for temporarily storing route guidance data and map data distributed from the map distribution server 30. Various map data include, for example, a city map data storage area 207a, an underground shopping center map data storage area, and the like. 207b and the building guide map data storage area 207c, respectively. The data stored in the distribution data storage unit 207 is read as necessary and displayed on the display unit 204.

  The positioning data storage unit 208 is a memory that temporarily stores the positioning result obtained by the positioning unit 203. The data stored in the positioning data storage unit 208 is read as necessary and displayed on the display unit 204 as a positioning history.

  The positioning determination unit 209 determines whether or not the GPS positioning is performed as usual based on the positioning result by the positioning unit 203, and controls the switching of the display mode. Specifically, when the GPS positioning can be performed as usual, the normal guidance mode for displaying the normal city map data is continued as it is, or the mode is shifted to the normal guidance mode from another mode. On the other hand, if it takes a predetermined time to acquire the current position of GPS, or if the position acquisition has failed a predetermined number of times, the underground map of the underground shopping center and the guidance of the building are displayed on the city map currently displayed on the display means 204. It is determined whether or not a detailed guide map such as a figure is included.

  Whether or not this detailed guide map is included in the city map is determined by the distribution data when the city map is downloaded from the map distribution server 30 if the displayed city map includes the guide map. Since it has been downloaded to the storage means 207, it is only necessary to check whether it is prepared in the underground shopping area map data storage area 207b and the building guide map data storage area 207c of the distribution data storage means 207. Is possible.

  The positioning determination means 209 shifts the display mode to the guidance map mode when a detailed guidance map is included in the currently displayed city map. On the other hand, if a detailed guide map is not included, the current position cannot be measured and there is no guide map that can be displayed, so the mode is shifted to the error display mode.

  The display control unit 210 performs control to display predetermined map data distributed from the map distribution server 30 on the display unit 204 in a predetermined display mode based on the display mode transferred by the positioning determination unit 209. Since the mobile terminal device 20 performs the positioning operation of the current position at a predetermined interval during the guidance operation, the display control unit 210 displays on the display unit 204 according to the positioning result of the positioning unit 203 and the determination result of the positioning determination unit 209. Update the displayed content.

  For example, when the positioning determination unit 209 determines that the normal guidance mode is set, the content displayed on the display unit 203 by the display control unit 210 includes a city map distributed from the map distribution server 30 and a positioning as will be described later. The current position acquired by the means 203, the map route guided by the recommended route received from the map distribution server 30, and the history of the positioning position acquired so far by the positioning means 203 and stored in the positioning data storage means 208 are stored. include.

  In addition, when the positioning determination unit 209 determines that the guidance map mode is set, the content displayed on the display unit 203 by the display control unit 210 is, first, an underground city in the city map displayed on the display unit 203. The location (specific area) where a detailed guide map such as a floor plan of a building or a guide map of a building is prepared is changed to a mode that can be visually recognized by the user, and on the display screen by a user operation from the operation input means 205 The cursor is displayed so that it can be clicked in order to move and to designate a predetermined position.

  When one place in a specific area is designated by the operation input means 205 and clicked on, a detailed guide map such as a floor plan of an underground shopping area or a building guide map at the selected place is displayed on the display means 204. Is displayed. At this time, it is preferable that the history of the positioning position acquired by the positioning means 203 so far and stored in the positioning data storage means 208 is also displayed on the display screen. Thus, when the history of the acquisition position of the positioning means 203 is also displayed on the guidance map, it becomes easy to understand from which direction the underground city or the building has entered the user.

  3 to 6 are diagrams showing examples of display screens of the mobile terminal device according to the embodiment of the present invention. FIG. 3 shows an example of a guidance screen displayed in the normal guidance mode during the route guidance operation. FIG. 4 shows an example of the guidance screen displayed in the guidance map mode after the guidance screen shown in FIG. 3 is displayed, and shows how a desired specific area is selected. FIG. 5 shows an example of a guidance screen displayed in the guidance map mode after the guidance screen shown in FIG. 4 is displayed, and shows a state where a detailed guidance map of a specified specific area is displayed. FIG. 6 shows another example of the guidance screen displayed in the guidance map mode after the guidance screen shown in FIG. 4 is displayed.

  As shown in FIG. 3, in the normal guidance mode, a cursor 52 indicating the current position of the mobile terminal device 20 obtained from the GPS signal by the positioning unit 203 is displayed on the display screen 51 provided on the display unit 204 of the mobile terminal device 20. And the map 54 including the history 53a-53e of the positioning position acquired by the positioning means 203 so far is displayed. The map 54 is a city map including roads 55 and building icons 56a to 56f indicating POI (Point of Interest). On this map, a route (not shown) guided by the recommended route received from the map distribution server 30 and guidance points (not shown) such as intersections and branch points on the route are displayed. May be.

  In addition, a soft key button column 61 in which various soft key buttons to which operation functions are assigned according to the display content of the display screen 51 is provided at the lower end portion of the display screen 51. In FIG. 3, a “ZOOM + (zoom up)” key 62 for enlarging the map 54 displayed on the display screen 51 and a “ZOOM− (zoom back)” key 63 for reducing the map 54 are displayed. ing.

  Then, the positioning means 203 fails the positioning operation a predetermined number of times during the display state shown in FIG. 3, and the positioning determination means 209 is the building icon 56a included in the map 54 displayed on the display screen 51 shown in FIG. If it is determined that a building having a detailed guide map (a floor plan of an underground shopping mall or a guide map of a building) is included in -56f, the display control means 210 guides the display means 204 as shown in FIG. Control to display the map in map mode.

  As shown in FIG. 4, in the guidance map mode, the display screen 51 provided on the display unit 204 of the mobile terminal device 20 is moved on the display screen by a user operation from the operation input unit 205 to designate a predetermined position. And a map 57 including positioning position histories 53c to 53f acquired so far by the positioning means 203 are displayed. Here, the position of the positioning position history 53f corresponds to the position of the cursor 52 indicating the current position of the mobile terminal device 20 shown in FIG.

  The map 57 includes building icons indicating roads 55 and POIs as in FIG. 3. Among the building icons, other building icons having detailed guidance maps (here 56a, 56c, 56d) are included. It is highlighted in a manner outlined with a thick line so that it can be distinguished from the building icon. The cursor 52 shows a state where the cursor 52 has been moved to the building icon 56d by a user operation from the operation input means 205 in order to select a desired building icon.

  Further, on the display screen 51 shown in FIG. 4, a message for prompting an operation by the user is displayed superimposed on the map 57. Here, a message 71 “Please select a building or an underground mall” is displayed. Further, in the soft key button column 61 provided at the lower end portion of the display screen 51, a predetermined position designated by the cursor is determined in addition to the “ZOOM +” key 62 and the [ZOOM−] key 63 as in FIG. A “OK” key 64 for clicking is displayed.

  In FIG. 4, when a desired building icon (56d in this case) is selected, the display control unit 210 displays a detailed guidance map in the guidance map mode on the display unit 204 as shown in FIG. To control.

  As shown in FIG. 5, in the guidance map mode, the display screen 51 provided on the display means 204 of the mobile terminal device 20 displays a detailed guidance map (here, the building 56d) of the building icon 56d designated in FIG. ) And a positioning position history 53d to 53f including the last positioning position 53f acquired by the positioning means 203 immediately before switching to the guide map mode is displayed. Here, at least the last positioning position 53f acquired by the positioning means 203 is displayed, and it is easy to understand from which direction of the building 56d the user has entered.

  Further, on the display screen 51 shown in FIG. 5, displays 72 to 74 representing keys for designating the hierarchy of the building 56 d are displayed superimposed on the map 58. Here, among the numeric keys provided on the operation input means 205, the guide map of the building 56d is switched to the upper floor with the “2” key, to the ground floor with the “5” key, and to the lower floor with the “8” key. It shows that you can. Further, in the soft key button column 61 provided at the lower end portion of the display screen 51, a “return” key 65 for returning to the display screen shown in FIG. 4 and an “END (end)” key 66 for ending the display process are provided. It is displayed.

  If the user sees the last positioning position 53f acquired by the positioning means 203 and finds that an incorrect building has been selected, the user can press the “return” key 65 to return to the display state of FIG. it can. In addition, since the last positioning position 53f acquired by the positioning means 203 is a guide for the return position when the user exits the underground shopping area, for example, even if the display is switched to the guide map of the underground shopping area when descending to the lower hierarchy, It is preferable that it is displayed as it is. In particular, in an underground mall, there may be no means for acquiring position information, so it is effective to display the last positioning position 53f acquired by the positioning means 203.

  In addition, although the example which displays the last positioning position 53f acquired by the positioning means 203 as information regarding the last positioning position was demonstrated in FIG. 5, it is not restricted to this, The direction of the last positioning position is displayed. May be. For example, in FIG. 4, when a desired building icon (56c in this case) is selected, the display control unit 210 displays a detailed guidance map in the guidance map mode on the display unit 204 as shown in FIG. To control.

  As shown in FIG. 6, in the guidance map mode, the display screen 51 provided on the display means 204 of the mobile terminal device 20 displays a detailed guidance map (here, the building 56 c) of the building icon 56 c specified in FIG. 4. ) And an arrow 75 indicating the direction of the last positioning position 53f obtained by the positioning means 203 immediately before switching to the guidance map mode is displayed. Thus, by displaying the arrow 75 indicating the direction of the last positioning position 53f acquired by the positioning means 203, it is easy to understand from which direction of the building 56c the user has entered.

Next, the map display operation after GPS positioning in the navigation system according to the embodiment of the present invention will be described.
FIG. 2 is a flowchart showing a map display mode switching check routine that is called after GPS positioning during navigation by the mobile terminal device according to the embodiment of the present invention. The operation procedure shown in FIG. 2 is realized by the control unit 201 of the mobile terminal device 20 executing a control program stored in the ROM.

  Since the mobile terminal device 20 performs the positioning operation of the current position by the positioning unit 203 at a predetermined interval during navigation, first, in the process of step S41, the positioning determination unit 209 performs GPS positioning by the positioning unit 203 under the control of the control unit 201. If the GPS positioning can be performed normally, the process proceeds to step S42, the display mode is shifted to the normal guidance mode, and the process is terminated. On the other hand, if it takes a predetermined time to acquire the current position by GPS positioning, or if the position acquisition by GPS positioning fails a predetermined number of times, the process proceeds to step S43.

  When the process proceeds to the normal guidance mode by the process of step S42, the display control unit 210 includes a predetermined position including the current position acquired by the positioning unit 203 among the city maps distributed from the map distribution server 30 by the control of the control unit 201. The city map of the range is read from the distribution data storage unit 207 and displayed on the display unit 204. At this time, the display control unit 210 also includes a history of positioning positions acquired by the positioning unit 203 and stored in the positioning data storage unit 208, a map route guided by a recommended route received from the map distribution server 30, and the like. It is preferable to display them on the display means 204.

  On the other hand, in the processing of step S43, whether or not the city map displayed by the positioning determination unit 209 on the display unit 204 by the control of the control unit 201 includes a detailed guide map such as an underground map of the underground shopping area or a building guide map. If a detailed guidance map is included, the process proceeds to step S44, the display mode is changed to the guidance map mode, and the process is terminated. On the other hand, if the detailed map is not included in the city map currently displayed on the display means 204, the map and the current position are not updated, and a message such as “cannot measure the current position” is displayed. Is displayed, and the process ends.

  When the processing shifts to the guidance map mode by the process of step S44, the display control means 210 is controlled by the control means 201, such as the underground map of the underground shopping center or the building guide map in the city map displayed on the display means 203. In order to change the display so that a user can visually recognize a place (specific area) where a detailed guide map is prepared, and to move the display screen by a user operation from the operation input unit 205 to designate a predetermined position. Display a cursor so that it can be clicked on.

  Subsequently, when one place in the specific area is designated by the operation input means 205 and the click is selected by the operation input means 205, the display control means 210 is displayed in detail such as a floor plan of the underground shopping area or a guide map of the building at the selected place. A guide map is displayed on the display means 204. At this time, it is preferable that the display control unit 210 causes the display unit 204 to display the history of the positioning position that has been acquired by the positioning unit 203 and stored in the positioning data storage unit 208 so far.

  In the above-described embodiment, an example in which the map range that can be displayed on the display screen 51 of the display unit 204 is used as the vicinity of the last positioning position has been described, but the present invention is not limited to this, and the last positioning position (display) A range included in a predetermined distance from the center of the map) may be used.

  Moreover, although the said Example demonstrated as a communication-type navigation system which consists of a portable terminal device and a map delivery server, if not limited to this and update of map information is manageable, a portable terminal device and The present invention may be applied when map information is downloaded to a portable information device that operates in a stand-alone manner with a map distribution server and the map information is displayed on the portable information terminal alone.

  As described above in detail, the map display system according to the present invention makes it possible to seamlessly display a detailed guide map of a spot desired by a user even when entering an underground shopping street where GPS signals are difficult to reach. ing. In addition, since the positioning information until immediately before the map is switched can be displayed, it is possible to prevent an error in selecting a spot desired by the user. For this reason, it is possible to implement widely in the navigation apparatus for pedestrians who acquire current position.

It is a block diagram which shows the structure of the navigation system concerning the Example of this invention. It is a flowchart which shows the check routine of the map display mode switching called after GPS positioning during navigation by the portable terminal device concerning the Example of this invention. It is a figure which shows an example of the display screen of the portable terminal device concerning the Example of this invention, and shows an example of the guidance screen displayed in normal guidance mode during route guidance operation | movement. It is a figure which shows an example of the display screen of the portable terminal device concerning the Example of this invention, and shows an example of the guidance screen displayed in the guidance map mode after displaying the guidance screen shown in FIG. It is a figure which shows an example of the display screen of the portable terminal device concerning the Example of this invention, and shows an example of the guidance screen displayed in the guidance map mode after displaying the guidance screen shown in FIG. It is a figure which shows an example of the display screen of the portable terminal device concerning the Example of this invention, and has shown the other example of the guidance screen displayed in the guidance map mode after displaying the guidance screen shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Navigation system 12 ... Network 20 ... Portable terminal device 201 ... Control means 202 ... Transmission / reception means 203 ... Positioning means 204 ... Display means 205 ··· operation input means 206 ··· distribution request means 207 ··· distribution data storage means 207a ··· city map data storage region 207b ··· underground map data storage region 207c ··· Building guide map data storage area 208 ··· positioning data storage means 209 ··· positioning determination means 210 ··· display control means 30 ··· map distribution server 31 ··· map database 32 ···・ Network database for route search

Claims (19)

The map distribution server includes a map distribution server and a map display device, and the map distribution server sends map information stored in the map database to the map display device, and a predetermined map for a user who moves based on the map information received by the map display device. A map display system for displaying,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
A map display system characterized by comprising:   The map display system according to claim 1, wherein the vicinity of the last positioning position is a display range of a map displayed on the display means when the positioning is last performed.   2. The map display system according to claim 1, wherein the vicinity of the last positioning position is within a predetermined distance range from the last positioning position.   4. The map display system according to claim 1, wherein the information related to the last positioning position is a position mark indicating a positioning position last measured. 5.   5. The map display system according to claim 1, wherein the information related to the last positioning position is a direction mark indicating a direction of the positioning position last measured. 6.   The map display system according to any one of claims 1 to 5, wherein the detailed guide map is a floor plan of an underground mall or a guide map of a building.   The map display according to any one of claims 1 to 6, wherein when displaying the map, the display means displays a history of positioning positions that have been measured by the positioning means so far. system.   8. The map display according to claim 1, further comprising an acquisition unit configured to simultaneously acquire the detailed guidance map when acquiring a map including the positioning position from a map database. 9. system. A map display device that receives map information stored in a map database from a map distribution server and performs a predetermined map display for a user who moves based on the received map information,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
A map display device characterized by comprising:   The map display device according to claim 9, wherein the vicinity of the last positioning position is a display range of a map displayed on the display means when the positioning is last performed.   The map display device according to claim 9, wherein the vicinity of the last positioning position is within a predetermined distance range from the last positioning position.   The map display device according to any one of claims 9 to 11, wherein the information related to the last positioning position is a position mark indicating a positioning position measured last.   The map display device according to any one of claims 9 to 11, wherein the information related to the last positioning position is a direction mark indicating a direction of the positioning position last measured.   The map display device according to any one of claims 9 to 13, wherein the detailed guide map is a floor plan of an underground mall or a guide map of a building.   The map display according to any one of claims 9 to 14, wherein the display means displays a history of positioning positions measured by the positioning means so far when displaying a map. apparatus.   The map display according to any one of claims 9 to 15, further comprising an acquisition unit configured to simultaneously acquire the detailed guide map when acquiring a map including the positioning position from a map database. apparatus. A map display method in a map display device that receives map information stored in a map database from a map distribution server and displays a predetermined map for a user who moves based on the received map information,
A positioning means for positioning the current position;
Display means for displaying a map including the positioning position measured by the positioning means;
Operation input means for selecting a predetermined area on the map;
When there is a specific area having a detailed guidance map around the last positioning position when the positioning means can no longer be positioned, the display means displays the specific area in a selectable manner,
When the specific area is selected by the operation input unit, the display control unit displays the detailed guidance map on the display unit and also displays information on the last positioning position;
With
Determining whether positioning by the positioning means is possible;
When it is determined that positioning by the positioning means is not possible, determining whether there is a specific area having a detailed guidance map around the last positioning position;
When it is determined that there is the specific area, the display means displays the specific area in a selectable manner;
Determining whether the specific area has been selected by the operation input means;
When it is determined that the specific area has been selected, the detailed guidance map is displayed on the display means, and information on the last positioning position is also displayed.
A map display method characterized by comprising:   18. The map display method according to claim 17, further comprising a step of displaying a history of positioning positions that have been measured by the positioning means so far when displaying a map on the display means.   19. The map display method according to claim 17, further comprising the step of acquiring the detailed guidance map at the same time when acquiring a map including the positioning position from a map database.

Images