JP4586451B2 - Information providing system and program - Google Patents

Description

  The present invention relates to an information providing system and a program.

  Conventionally, in a navigation device, for example, a current position of a vehicle, that is, a current position, is detected by GPS (Global Positioning System), and a rotation angular velocity of a vehicle detected by a gyro sensor, that is, based on a turning angle, The direction of the vehicle, that is, the vehicle direction is detected, map data is read from the data recording unit, a map screen is formed on the display unit, and the vehicle position indicating the current location on the map screen, the vicinity of the vehicle position The map and the vehicle direction are displayed. Therefore, the driver who is an operator can drive the vehicle according to the vehicle position displayed on the map screen, the map around the vehicle position, and the vehicle direction.

  Further, when the driver inputs a destination and sets search conditions, a route from the departure point to the destination represented by the current location is searched based on the search conditions. The searched route, that is, the searched route is displayed together with the vehicle position on the map screen. Therefore, the driver can drive the vehicle along the displayed search route.

By the way, in order to display various points on the map screen, display items including characters, symbols, and the like are displayed. And when trying to display display items for nearby points, if each display item overlaps, the display item with low priority set for each display item is deleted from the map, and only the display item with high priority is displayed Is done. The priority of the display item can be changed by the driver operating the operation unit (see, for example, Patent Document 1).
JP 2002-131068 A

  However, in the conventional navigation device, since it is necessary to operate the operation unit in order to change the priority of the display item, the operation is troublesome. Further, if the scale of the map screen is reduced and a wide area map is displayed, a display item desired to be viewed may not be displayed, and the convenience of the navigation device is reduced.

  The present invention solves the problems of the conventional navigation device, can preferentially display a predetermined one of the display items, can simplify the work, and is convenient for the navigation device. An object of the present invention is to provide an information providing system and program capable of improving the performance.

  Therefore, in the information providing system of the present invention, it is determined whether or not a predetermined point determination condition is satisfied, a point determination processing means for increasing the priority of the point where the point determination condition is satisfied, and the priority Based on the display reference value setting processing means for setting the display scale representing the scale of the map of the widest area of the map on which the display item corresponding to the point is displayed, and a predetermined scale. A display item extraction processing unit that extracts a display item corresponding to a point where the display scale is equal to or less than the predetermined scale as a point where the display item is to be displayed on the display map, and the display item extraction processing unit Overlap determination processing means for determining whether or not an overlap occurs in a display item, and when an overlap occurs in the display item, In the display map formed at the predetermined scale, the thinning processing means for comparing the display scales of the respective points where the occurrence of the occurrence occurs, and thinning out display items other than the display item corresponding to the point with the smallest display scale, Drawing processing means for drawing display items other than the display items thinned out by the thinning processing means out of the display items extracted by the item extraction processing means.

  In the program of the present invention, the computer determines whether or not a predetermined point determination condition is satisfied, and based on the priority, point determination processing means for increasing the priority of the point where the point determination condition is satisfied, Display reference value setting processing means for setting a display scale representing the scale of the widest map among the maps on which display items corresponding to the point are displayed for each point, displayed on a display map formed at a predetermined scale Display item extraction processing means for extracting a display item corresponding to a point where the display scale is equal to or less than the predetermined scale as a point where an item is to be displayed, and the display item extracted by the display item extraction processing means overlaps. Overlap determination processing means for determining whether or not to occur, if an overlap occurs in the display item, an overlap occurs in the display item The display item extraction process in the thinning processing means for thinning out display items other than the display item corresponding to the point with the smallest display scale, and the display map formed at the predetermined scale The display item extracted by the means is made to function as a drawing processing means for drawing a display item other than the display item thinned out by the thinning processing means.

  According to the present invention, the display scale is set for each point based on the priority, and the display item of the point to be displayed on the display map formed at a predetermined scale is extracted based on the display scale. There is no need to operate the operation unit, and the work can be simplified. In addition, for example, even when a wide-area display map is displayed, display items at points with high usage frequency are preferentially displayed, so that the convenience of the navigation device can be improved.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

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

  In the figure, reference numeral 14 denotes an information terminal, for example, a navigation device as an in-vehicle device mounted on a vehicle. The navigation device 14 includes a GPS sensor 15 as a current location detecting unit for detecting the current location, various types of data in addition to map data. A data recording unit 16 as an information recording unit in which information is recorded, a navigation processing unit that functions as a computer based on various programs, data, and the like, and that performs various arithmetic processing such as navigation processing based on input information 17, an orientation sensor 18 as an orientation detection unit for detecting the direction of the vehicle, an operation unit 34 as a first input unit for performing a predetermined input when operated by a driver as an operator, and a screen (not shown) A display unit 35 as a first output unit for performing various displays according to the displayed image and notifying the driver, A voice input unit 36 as a second input unit for performing predetermined input by voice, a voice output unit 37 as a second output unit for performing various displays by voice and notifying the driver, a communication terminal The navigation unit 17 is connected to the operation unit 34, the display unit 35, the voice input unit 36, the voice output unit 37, and the communication unit 38. The navigation processor 17 is also connected with a vehicle speed sensor 41 as a vehicle speed detector.

  The GPS sensor 15 detects the current location on the earth by receiving radio waves generated by an artificial satellite, and also detects the time. In the present embodiment, the GPS sensor 15 is used as the current position detection unit, but a distance sensor, a steering sensor, an altimeter, etc. (not shown) may be used alone or in combination instead of the GPS sensor 15. Further, a gyro sensor, a geomagnetic sensor, or the like can be used as the direction sensor 18.

  The data recording unit 16 includes a map database including map data files, and map data is recorded in the map database. The data recording unit 16 also records data for outputting predetermined information by the audio output unit 37. The map data includes intersection data related to intersections, node data related to nodes, road data related to road links, search data processed for searching, facility data related to facilities, and the like.

  The navigation processing unit 17 includes a CPU 31 as a control device that controls the entire navigation device 14, a RAM 32 as a first recording medium used as a working memory when the CPU 31 performs various arithmetic processes, and a control device. In addition to the program, the ROM 33 as a second recording medium on which various programs for searching for a route to the destination, route guidance, etc. are recorded, various data, programs and the like used for recording 3 is provided with a flash memory (not shown) as a recording medium. Note that an MPU or the like may be used as the control device instead of the CPU 31.

  The data recording unit 16 includes a disk (not shown) such as a hard disk, a CD, a DVD, and an optical disk as a fourth recording medium for recording the various data, and reads various data. A head (not shown) such as a read / write head for writing is provided. Note that a memory card or the like can be used as the fifth recording medium in the data recording unit 16.

  By the way, various programs can be recorded in the ROM 33 and various data can be recorded in the data recording unit 16, but the programs, data, and the like can also be recorded on a hard disk or the like. In this case, the program, data, etc. can be read from a hard disk or the like and written to the flash memory. Therefore, the program, data, etc. can be updated by exchanging the hard disk or the like. Further, when an automatic transmission control device is mounted to control an automatic transmission (not shown) mounted on the vehicle, the control program and data for the automatic transmission control device are also stored in the hard disk or the like. Can be recorded. Further, the program, data, etc. can be received via the communication unit 38 and written to the flash memory.

  The operation unit 34 is operated by the driver to correct the current location at the start of traveling, to input a departure point and a destination, to input a passing point, and to activate the communication unit 38. It is possible to use a keyboard, a mouse, etc. that are arranged independently of the display unit 35. Further, as the operation unit 34, a predetermined input operation is performed by touching or clicking an image operation unit such as various keys, switches, and buttons displayed as images on the screen formed in the display unit 35. It is possible to use a touch panel that can be used.

  A display can be used as the display unit 35. Then, on various screens formed on the display unit 35, the vehicle position indicating the current location, a map, a searched route, guidance information along the searched route, traffic information, etc. are displayed, or until the next intersection in the searched route. In addition to displaying the distance and the direction of travel at the next intersection, the operation guidance, operation menu, and key guidance of the image operation unit, operation unit 34, voice input unit 36, etc. can be displayed. A multiplex broadcast program or the like can be displayed.

  The voice input unit 36 includes a microphone (not shown) and the like, and can input necessary information by voice. Further, the voice output unit 37 includes a voice synthesizer and a speaker (not shown), and the search route, guidance information, traffic information, and the like are output from the voice output unit 37, for example, as voice synthesized by the voice synthesizer. .

  The communication unit 38 is arranged along a road with various types of information transmitted from a road traffic information center (not shown) such as a VICS (registered trademark) vehicle center as a first information provider. A beacon receiver for receiving as a radio beacon, an optical beacon or the like via a radio beacon device or an optical beacon device, an FM receiver for receiving as an FM multiplex broadcast via an FM broadcast station, or the like. And, the beacon receiver receives traffic information such as traffic jam information, regulation information, parking lot information, traffic accident information, service area congestion status information, etc. In addition to the traffic information, news, General information such as weather forecasts can be received as FM multiplexed information. The beacon receiver and the FM receiver are unitized and arranged as a VICS receiver, but can be arranged separately.

  The traffic information specifies information type data indicating the type of information, secondary mesh X and Y data for specifying a secondary mesh as a mesh, and a road link connecting two points (for example, intersections). And link number data representing the uplink / downlink and link information representing the content of information provided corresponding to the link number data. The link information includes, for example, a traffic jam from the start point of the road link. From the traffic jam heading data that represents the distance to the head, the traffic jam degree that represents the degree of traffic jam, the traffic jam section that represents the distance from the head of the traffic jam to the end of the traffic jam, the link time required for each road link, etc. Become.

  The communication unit 38 can also receive various information such as traffic information and general information from the information center 51 as the second information provider. For this purpose, the communication unit 38 and the information center 51 are connected via a network 43.

  The navigation device 14, the road traffic information center, the information center 51, the network 43 and the like constitute a navigation system, and various types of information are transmitted and received between the communication unit 38 and the communication unit 57 of the information center 51.

  The network 43 may be a LAN (Local Area Network), a WAN (Wide Area Network), a communication line network such as the Internet, or the like.

  The information center 51 includes a server 53, a communication unit 57 connected to the server 53, a database (DB) 58 as an information recording unit, and the like. The server 53 includes a CPU 54, a RAM 55, an arithmetic device and a control device, A ROM 56 is provided, and functions as a computer based on predetermined programs, data, and the like. In addition, the same data as various data recorded in the data recording unit 16 can be recorded in the database 58. The server 53 and the navigation processing unit 17 can also constitute a computer. Further, an MPU or the like can be used instead of the CPU 54.

  By the way, in the present embodiment, in addition to the map database, a statistical database composed of statistical data files, a travel history database composed of travel history data files, and the like are formed in the data recording unit 16. Statistical data as first actual traffic information is recorded as travel history data as second actual traffic information in the travel history data file.

  The statistical data is a history of traffic information such as traffic jam information provided in the past, that is, history information representing a history, traffic information provided by the road traffic information center, etc., and provided by the Ministry of Land, Infrastructure, Transport and Tourism. It is created by combining, processing, and applying statistical processing to road traffic census information, which is data representing traffic volume based on road traffic census.

  In addition, the statistical data is processed by using a combination of road timetable information provided by the Ministry of Land, Infrastructure, Transport and Tourism and probe data that is travel history data collected from a plurality of vehicles by the information center 51 as necessary. It can also be created by applying statistical processing.

  In the statistical data, it is possible to add traffic jam prediction information for predicting a traffic jam status to the history information. In that case, in creating the statistical data, detailed conditions such as date and time, day of the week, weather, various events, seasons, facility information (presence / absence of large facilities such as department stores and supermarkets) are added to the history information.

  In addition, the travel history data is calculated and accumulated based on the travel record of the vehicle, that is, data (travel data) representing the travel record on the travel route.

  In the present embodiment, the map database, the travel history database, the statistical database, and the like are arranged in the data recording unit 16, but in the information center 51, the map database, the travel history A database, a statistical database, etc. can also be provided.

  Next, a basic operation when the navigation system having the above configuration is used as an information providing system will be described.

  First, when the operation unit 34 is operated by the driver and the navigation device 14 is activated, a navigation initialization processing unit (not shown) of the CPU 31 performs navigation initialization processing, and the current location and direction detected by the GPS sensor 15. While reading the direction of the vehicle detected by the sensor 18, various data are initialized. Note that the matching processing means (not shown) of the CPU 31 performs matching processing, and the current location is on any road link based on the trajectory of the read current location and the shape and arrangement of each road link constituting the surrounding road. The current location is specified by determining whether the current location is located.

  Subsequently, an information acquisition processing unit (not shown) of the CPU 31 performs an information acquisition process and reads and acquires the map data from the data recording unit 16 or receives and acquires it from the information center 51 or the like via the communication unit 38. To do. When acquiring from the information center 51, the information acquisition processing means downloads the received navigation data to the flash memory. In addition, when the navigation data is acquired via the communication unit 38, the program can also be acquired.

  A display processing unit (not shown) of the CPU 31 performs display processing and forms various screens on the display unit 35. For example, the map display processing means of the display processing means performs map display processing, forms a map screen on the display unit 35, and displays the vehicle position, a map around the vehicle position, and the vehicle direction on the map screen. . Therefore, the driver can drive the vehicle according to the vehicle position, the map around the vehicle position, and the vehicle direction. In this case, a map is displayed on the map screen at a predetermined display condition, that is, at a predetermined scale of a plurality of preset scales, and on the map, characters representing a point name such as a facility, an intersection, and the like are displayed. Display items including symbols, characters representing area names such as municipalities, characters representing route names such as expressways and toll roads including highways and toll roads, and the like are displayed. A display map screen is constituted by the map screen, and a display map is constituted by the map.

  Further, when the driver operates the operation unit 34 to input a destination, a destination setting processing unit (not shown) of the CPU 31 performs a destination setting process to set the destination. Note that the departure place can be input and set as necessary. Moreover, a predetermined point can be registered in advance, and the registered point can be input as a destination.

  Then, when the destination is set, the route search processing means (not shown) of the CPU 31 performs route search processing, reads the current location, destination, etc., and also reads the search data, etc. from the data recording unit 16, and presents the current location, destination. Based on the location and the search data, a route from the departure point represented by the current location to the destination is searched under predetermined search conditions, and route data representing the searched route is output. In this case, the route having the smallest total link cost assigned to each road link is set as the searched route.

  Subsequently, a guidance processing means (not shown) of the CPU 31 performs guidance processing and guides the driver on the searched route, that is, route guidance. For this purpose, the route display processing means of the guidance processing means performs route display processing, reads the route data, and displays the searched route on the map screen according to the route data. In this case, if necessary, the voice output processing means of the guidance processing means performs voice output processing and outputs a search route by voice from the voice output unit 37 to perform route guidance.

  The information center 51 can perform route search processing. In that case, the CPU 31 transmits the current location, the destination, etc. to the information center 51. When the information center 51 receives the current location and destination, the route search processing means (not shown) of the CPU 54 performs route search processing similar to that of the CPU 31 and reads the search data from the database 58 to obtain the current location, destination and search data. Based on the above, a route from the departure point to the destination is searched, and route data representing the searched route is output. Subsequently, a transmission processing unit (not shown) of the CPU 54 performs transmission processing and transmits the route data to the navigation device 14. Therefore, in the navigation device 14, when the information acquisition processing means receives the route data from the information center 51, the guidance processing means performs route guidance as described above.

  By the way, the navigation device 14 can receive traffic information, general information, and the like provided in real time from the road traffic information center and the information center 51 via the communication unit 38. For this purpose, the additional information acquisition processing means of the information acquisition processing means performs additional information acquisition processing, and receives and acquires the traffic information, general information, and the like as additional information.

  Therefore, the display processing means can display additional information on the map screen. For this purpose, the traffic jam indicator display processing means of the display processing means performs traffic jam indicator display processing, and shows traffic jam information in the traffic information, for example, whether the road where the traffic jam has occurred or whether it is a traffic jam location. It is converted into a traffic jam zone as a traffic jam index to be expressed, and the traffic jam zone is displayed along the road on the map screen. In this case, the color of the road, traffic jam zone, etc. is changed to red, orange, etc. according to the degree of traffic jam. A traffic jam arrow can be displayed as the traffic jam index instead of the traffic jam zone.

  In this manner, the driver can know the traffic jam situation on the route on which the vehicle is to travel, the searched route, and the like. The guidance processing means calculates the total link time from the departure point to the destination based on the route data, statistical data, travel history data, traffic information, etc., and calculates the arrival time of the destination. be able to.

  By the way, in this Embodiment, since the determination about the usage frequency of various points, such as a facility, an interchange, a service area, a parking area, and a junction, is performed and the display item of each point is displayed, so that usage frequency becomes high Is given higher priority and is displayed on the map screen preferentially with respect to display items at other points.

  Therefore, the point determination processing means (not shown) of the CPU 31 performs the point determination process, determines whether the point determination condition is satisfied depending on whether a predetermined point is used, and if the point determination condition is satisfied, Increase the priority of.

  FIG. 2 is a main flowchart showing the operation of the point determination processing means in the first embodiment of the present invention.

  The destination determination processing means of the point determination processing means performs destination determination processing to increase the priority of the point set as the destination, and the stopping facility determination processing means of the point determination processing means is a stopping facility determination processing To increase the priority of the stop-off facility where the vehicle stops. In addition, the interchange determination processing means of the point determination processing means performs the interchange determination processing to increase the priority of the interchange that is a point where the passenger gets on and off the expressway and the toll road, and the stop area determination processing means of the point determination processing means An area determination process is performed to increase the priority of the stop area where the vehicle stops on the highway / toll road. The junction determination processing means of the point determination processing means performs junction determination processing and increases the priority of the junction that is the point where the vehicle passes on the highway / toll road.

  The interchange determination processing means, the stop area determination processing means and the junction determination processing means constitute a high speed / toll road facility determination processing means, and the high speed / toll road facility determination processing means performs the high speed / toll road facility determination processing. And determine whether the highway and toll road facilities at the interchange, stopover area, and junction are used.

  In the present embodiment, whether or not a predetermined point is set as a destination, whether or not a vehicle has stopped at a predetermined stop-off facility, whether there is an interchange getting on or off, whether a vehicle has stopped at a stop-off area, and a vehicle The point determination condition is whether or not the vehicle has passed through the junction, and when the predetermined point is set as the destination, when the vehicle stops at the predetermined stop-off facility, when the interchange gets on and off, the vehicle moves to the stop area When at least one of the cases where the vehicle stops and the vehicle passes through the junction, the point determination condition is satisfied, the destination is not set, the vehicle does not stop at the stop-off facility, the interchange does not get on and off, and the vehicle If you do not stop by the stopover area and the vehicle does not pass the junction, the point determination condition is not met

Next, a flowchart will be described.
Step S1: Destination determination processing is performed.
Step S2 A stop-in facility determination process is performed.
Step S3 An interchange determination process is performed.
Step S4 A stop area determination process is performed.
Step S5: A junction determination process is performed, and the process ends.

  Next, the subroutine for the destination determination process in step S1 in FIG. 2 will be described.

  FIG. 3 is a diagram showing a subroutine of destination determination processing in the first embodiment of the present invention.

  In this case, the destination determination processing means determines whether or not the destination is set in the destination determination processing, and when the destination is set, determines that the point determination condition is satisfied, reads the destination, Increase the priority of the destination facility. Also, the destination determination processing means increases the priority of the facility of the same genre as the facility that is the destination.

Next, a flowchart will be described.
Step S1-1: It is determined whether or not the destination has been set. When the destination is set, the process proceeds to step S1-2, and when it is not set, the process returns.
Step S1-2: Increase the priority of the destination facility.
Step S1-3: Raise the priority of the facility of the same genre as the facility as the destination and return.

  Next, a subroutine for the stopping facility determination process in step S2 of FIG. 2 will be described.

  FIG. 4 is a diagram showing a subroutine of the stopping facility determination process in the first embodiment of the present invention.

  In this case, the stoppage facility determination processing means determines whether or not the predetermined point is a stopover facility depending on whether or not the engine is turned on / off near the point, and the engine is turned on / off. If it is determined that the point is a stop-in facility, it is determined that the point determination condition is satisfied, and the priority of the stop-in facility is increased.

Next, a flowchart will be described.
Step S2-1: It is determined whether or not the engine has been turned on / off in the vicinity of the point. If the engine is turned on / off near the point, the process proceeds to step S2-2, and if not, the process returns.
Step S2-2: Raise the priority of the stopping facility and return.

  Next, the interchange determination process subroutine of step S3 in FIG. 2 will be described.

  FIG. 5 is a diagram showing a subroutine of the interchange determination process in the first embodiment of the present invention.

  In this case, the interchange determination processing means determines whether or not a predetermined interchange is used as a boarding / exiting interchange (IC) on a high-speed / toll road. , Increase the priority of the interchange.

Next, a flowchart will be described.
Step S3-1: It is determined whether or not it is used as a boarding / alighting interchange. If it is used as a boarding / alighting interchange, the process proceeds to step S3-2, and if it is not used, the process returns.
Step S3-2: Increase the priority of interchange and return.

  Next, the stop area determination processing subroutine of step S4 in FIG. 2 will be described.

  FIG. 6 is a diagram showing a sub-routine for the stop area determination process in the first embodiment of the present invention.

  In this case, the stop area determination processing means determines whether or not the vehicle is on the link between the service area and the parking area as to whether the predetermined service area and the parking area (SA / PA) are the stop area. When the vehicle gets on the link, it is determined whether the engine is turned on / off in the service area and the parking area. When the engine is turned on / off in the service area and the parking area, it is determined that the service area and the parking area are stop areas, and that the point determination condition is satisfied, and the service area and the parking area Increase priority.

Next, a flowchart will be described.
Step S4-1: It is determined whether or not the service area and parking area links have been boarded. If the service area and the parking area link are boarded, the process proceeds to step S4-2, and if not, the process returns.
Step S4-2: It is determined whether or not the engine is turned on / off in the service area and the parking area. If the engine is turned on / off in the service area and the parking area, the process proceeds to step S4-3, and if not, the process returns.
Step S4-3: Prioritize the service area and parking area and return.

  Next, the junction determination processing subroutine of step S5 in FIG. 2 will be described.

  FIG. 7 is a diagram showing a subroutine for junction determination processing in the first embodiment of the present invention.

  In this case, the junction determination processing means determines whether or not the vehicle has passed the predetermined junction by determining whether or not the vehicle has boarded the link of the junction. At the same time, it is determined that the point determination condition is satisfied, and the priority of the junction is increased.

Next, a flowchart will be described.
Step S5-1: It is determined whether or not the junction link has been boarded. If it is boarded at the junction link, the process proceeds to step S5-2, and if it is not boarded, the process returns.
Step S5-2: Increase the priority of the junction and return.

  In this way, in the point determination process, when the point determination condition is established for each point of the destination, the stopping facility, the interchange, the stopping area, and the junction, the priority is increased. In this embodiment, an initial value of priority is set for each point, and when the frequency of use at each point increases, the priority is increased. However, in other embodiments, the frequency of use at each point is low. Then, the priority is lowered.

  In another embodiment, the priority can be recorded for each period and can be changed periodically. In this case, the season, month, etc. are set as the time.

  FIG. 8 is a diagram showing a priority recording state according to the first embodiment of the present invention.

  For example, in the example shown in the figure, the initial value γ0 of the priority γ is set, and the priority γ is lowered as the frequency of use of the spot decreases, but one year passes and approaches the same time Then, the priority γ is increased by a predetermined value.

  Subsequently, a display item display processing unit (not shown) of the CPU 31 performs a display item display process and displays a display item on the map screen.

  FIG. 9 is a flowchart showing the operation of the display item display processing means in the first embodiment of the present invention, FIG. 10 is a diagram showing a first example of the map screen in the first embodiment of the present invention, and FIG. Is a diagram showing a reference example of the map screen, and FIG. 12 is a diagram showing a second example of the map screen in the first embodiment of the present invention.

  First, the display item extraction processing means of the display item display processing means performs display item extraction processing, reads the scale of the map formed on the map screen, and extracts the display items to be displayed on the map corresponding to the scale. For this purpose, the display reference value setting processing means of the display item extraction processing means performs display reference value setting processing, and sets a display scale as a display reference value for each point based on priority. That is, the display reference value setting processing means reads the priority of each point, compares the priority with a priority threshold set for each map scale, and corresponds to the threshold if the priority is greater than the threshold. The scale to be set is set as the display scale as the display reference value. In this case, the display scale represents the scale of the widest map among the maps on which the display items are displayed, and the display item is not displayed on the wide-area map of the scale smaller than the display scale, and the display scale is larger than the display scale. Display items are displayed on a small-scale map.

  In addition, when displaying a display item on the map, the scale is reduced, and the larger the map, the higher the possibility that the display items will overlap. Therefore, in the present embodiment, a threshold is set for each scale, and the threshold is set higher as the scale becomes smaller.

  Subsequently, the extraction processing means of the display item extraction processing means performs extraction processing, determines whether or not the display scale set for each point is equal to or smaller than the scale of the map displayed on the map screen, and the display scale. If is less than or equal to the scale of the map, the display item at the point corresponding to the display scale is extracted.

  By the way, the map data only includes display items made up of characters and symbols representing point names such as facilities and intersections, characters representing area names such as municipalities, and characters representing route names such as highways and toll roads. Instead, the display scale is recorded for each display item. Therefore, the extraction processing means further reads the display scale recorded for each point, determines whether the display scale is equal to or smaller than the scale of the map displayed on the map screen, and the display scale is the map scale. If it is the following, the display item at the point corresponding to the display scale is extracted.

  Subsequently, the overlap determination processing means of the display item display processing means performs an overlap determination process and determines whether or not an overlap occurs in the display item. When the display item overlaps, the display item display processing unit thinning-out processing unit performs a thinning-out process, compares the display scales of the respective display items in which the display item overlaps, and has the smallest scale. Even when a map (the widest area map) is displayed, display items other than the display item to be displayed, that is, display items other than the display item with the smallest display scale are thinned out.

  Subsequently, the drawing processing means of the display item display processing means performs a drawing process and displays the extracted display item on the map screen by drawing.

  For example, in FIGS. 10 to 12, an area AR <b> 1 for displaying the orientation and scale of the map and an area AR <b> 2 for displaying the distance to the destination are formed on the map screen, and a map for displaying a narrow area is displayed. Key k1, key k2 for displaying a map of a wide area, key k3 for stopping display of a predetermined key, key k4 for changing display, key k5 for setting a destination, and point registration In addition to displaying the key k6 and the like, the current location Pr and display items x1 to x3 are displayed. The keys k1 to k6 constitute operation elements.

  In this case, the road item Pascal Kiyomi of the display item x2 is displayed on the map scale of the map screen of FIG. 10, but in the conventional navigation device, the map scale is as shown in FIG. When the size is reduced, “Road Station Pascal Kiyomi” is deleted from the map, and “Ohara” of the display item x3 is displayed. On the other hand, in the present embodiment, for example, when the priority of the display item x2 is high, even if the map scale is reduced as shown in FIG. “Station Pascal Kiyomi” is displayed. Although the display items x2 and x3 overlap, the display item x3 is thinned out because the display item x2 has a higher priority than the display item x3.

  Thus, in this Embodiment, since the priority of a display item is automatically changed about each point, it is not necessary to operate the operation part 34, and a work can be simplified. Moreover, even if the scale of the map screen is reduced and a wide-area map is displayed, display items that are frequently used are preferentially displayed, so that the convenience of the navigation device 14 can be improved.

Next, a flowchart will be described.
Step S11: Display items are extracted corresponding to the scale.
Step S12 determines whether or not an overlap occurs in the displayed items. If an overlap occurs in the display item, the process proceeds to step S13. If not, the process proceeds to step S14.
Step S13: A thinning process is performed.
Step S14 A drawing process is performed and the process is terminated.

  Next, a second embodiment of the present invention in which display items are displayed on a high-speed schematic diagram screen as a display map screen will be described.

  FIG. 13 is a diagram showing a first example of a high-speed schematic diagram screen in the second embodiment of the present invention, FIG. 14 is a diagram showing a reference example of the high-speed schematic diagram screen, and FIG. 15 is a second example of the present invention. It is a figure which shows the 2nd example of the high-speed schematic diagram screen in the form.

  In the figure, k1 is a key for displaying a high-speed schematic diagram as a narrow area display map, and k2 is a key for displaying a wide-area high-speed schematic diagram. In this case, “Nagoya”, “Togo”, “Miyoshi”, and “Toyota” are displayed as the display items x11 to x14 on the scale of the high-speed schematic diagram of the high-speed schematic diagram screen of FIG. In FIG. 14, when the scale of the high-speed schematic diagram is reduced, “Togo” and “Miyoshi” of the display items x12 and x13 are deleted from the high-speed schematic diagram and newly displayed as a display item x15. “Okazaki” is displayed. On the other hand, in the present embodiment, for example, when the priority of the point of the display item x12 is high, even if the scale of the high-speed schematic diagram is reduced as shown in FIG. Is displayed.

  Next, a description will be given of a third embodiment of the present invention in which display items are displayed on a high-speed schematic screen as a display map screen.

  FIG. 16 is a diagram showing a first example of a high-speed schematic screen in the third embodiment of the present invention. FIG. 17 is a diagram showing a second example of the high-speed schematic screen in the third embodiment of the present invention. FIG. 18 is a diagram showing a third example of the high-speed schematic screen in the third embodiment of the present invention.

  In the figure, k1 is a key for displaying a high-speed schematic diagram as a narrow area display map, and k2 is a key for displaying a wide-area high-speed schematic diagram. The high-speed schematic screen is formed on the display unit 35 (FIG. 1) when the vehicle is on the highway, and is a predetermined one of the interchange, service area, parking area, and junction points on the highway. Several points, for example, three points are selected, and the name and symbol of each point are displayed as display items on the high-speed schematic screen.

  Further, the high-speed schematic screen is set with a wide area corresponding to the scale of the map, and a plurality of high-speed schematic diagrams can be displayed with different wide areas. And as the degree of wide area becomes smaller, the number of points that are candidates for displaying the display item among the points is reduced, and as the degree of wide area becomes larger, the number of points that become candidates for displaying the display item among the points. Is increased.

  In this case, the display item extraction processing means performs display item extraction processing, reads the wide area of the high-speed schematic displayed on the high-speed schematic screen, and extracts display items to be displayed on the high-speed schematic according to the wide area. . For this purpose, the display reference value setting processing means performs a display reference value setting process, and sets the display wide area for each point based on the priority. That is, the display reference value setting processing means reads the priority of each point, compares the priority with a priority threshold set for each wide area of the high-speed schematic diagram, and if the priority is greater than the threshold, The corresponding wide area is set as the display wide area. In this case, the display wide area represents the wide area of the widest high-speed schematic among the high-speed schematics on which the display items are displayed, and no display item is displayed in the high-speed schematic of the wide area smaller than the display wide area. A display item is displayed in a high-speed schematic diagram with a wide area level equal to or greater than the display wide area level.

  Subsequently, the extraction processing means performs an extraction process to determine whether or not the display wide area set for each point is equal to or larger than the scale of the high-speed schematic displayed on the high-speed schematic screen. If it is greater than or equal to the scale of the schematic diagram, the display item at the point corresponding to the display wide area is extracted.

  By the way, in this embodiment, the display wide area as the display reference value in the high-speed schematic diagram is set in advance for each point as in the display scale in the first embodiment, and the map data is set for each point. To be recorded. That is, for example, based on the number of vehicles getting on and off for interchanges, on the basis of the number of vehicles used for service areas and parking areas, and on the basis of the number of vehicles passing for junctions, the display wideness is set differently. The greater the number of passengers, the number of passengers used, and the number of passengers passing through, the smaller the display wideness level, and the smaller the number of passengers getting on / off, the number of passengers used, and the number of passengers passing, the larger the display regionality. For interchanges and junctions at the ends of routes, the smallest display wideness is set so that the display item is displayed even in the fastest schematic diagram in the widest area.

  Therefore, the extraction processing unit further reads out the display wide area recorded as map data for each point, and determines whether the display wide area is equal to or greater than the wide area of the high-speed schematic displayed on the high-speed schematic screen. If the display wide area is equal to or greater than the wide area of the high-speed schematic diagram, a display item at a point corresponding to the display wide area is extracted.

  For example, in the high-speed schematic screen of FIG. 16, at the largest wide area of the high-speed schematic diagram, as the display items x21 to x23, three points near the current position among the facilities ahead in the traveling direction from the current position, “Komaki JCT”, “Owari Ichinomiya PA” and “Ichinomiya JCT” are displayed. In the largest area, display items of all interchanges, junctions, service areas, and parking areas are extracted and displayed. On the other hand, as shown in FIG. 17, when the wide area of the high-speed schematic is reduced by one step, “Owari Ichinomiya PA” of the display item x22 is deleted from the high-speed schematic and newly displayed as the display item x24 “ Nagaragawa PA "is displayed. That is, if the wide area level is increased by one level from the smallest, display items in the parking area are not extracted.

  On the other hand, as in the first embodiment, when the display wide area is set according to the priority for each point on the highway, for example, when the priority of the point of the display item x22 is high, FIG. As shown in FIG. 4, even if the wide area of the high-speed schematic diagram is reduced, “Owari Ichinomiya PA” is displayed.

  Further, during route guidance, the priority of the interchange where the vehicle gets off the highway in the route can be made higher, and even the smallest wide area can be displayed as a display item.

  In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.

It is a block diagram which shows the navigation system in the 1st Embodiment of this invention. It is a main flowchart which shows operation | movement of the point determination process means in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the destination determination process in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the stoppage facility determination process in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the interchange determination process in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the stop area determination process in the 1st Embodiment of this invention. It is a figure which shows the subroutine of the junction determination process in the 1st Embodiment of this invention. It is a figure which shows the recording state of the priority in the 1st Embodiment of this invention. It is a flowchart which shows operation | movement of the display item display process means in the 1st Embodiment of this invention. It is a figure which shows the 1st example of the map screen in the 1st Embodiment of this invention. It is a figure which shows the reference example of a map screen. It is a figure which shows the 2nd example of the map screen in the 1st Embodiment of this invention. It is a figure which shows the 1st example of the high-speed schematic diagram screen in the 2nd Embodiment of this invention. It is a figure which shows the reference example of a high-speed schematic diagram screen. It is a figure which shows the 2nd example of the high-speed schematic diagram screen in the 2nd Embodiment of this invention. It is a figure which shows the 1st example of the high-speed schematic screen in the 3rd Embodiment of this invention. It is a figure which shows the 2nd example of the high-speed schematic screen in the 3rd Embodiment of this invention. It is a figure which shows the 3rd example of the high-speed schematic screen in the 3rd Embodiment of this invention.

Explanation of symbols

14 Navigation device 17 Navigation processing unit 43 Network 51 Information center 54 CPU
x1 to x3, x11 to x15, x21 to x24 Display items

Claims (5)

It is determined whether or not a predetermined point determination condition is satisfied, and a point determination processing means for increasing the priority of the point where the point determination condition is satisfied, and corresponding to the point for each point based on the priority Display reference value setting processing means for setting a display scale representing the scale of the widest map in the map where the display item is displayed, and a point where the display item should be displayed on the display map formed at a predetermined scale The display item extraction processing means for extracting the display item corresponding to the point where the display scale is less than or equal to the predetermined scale, and whether or not the display item extracted by the display item extraction processing means is overlapped is determined. When an overlap occurs between the overlap determination processing means and the display item, the display scale of each point where the display item overlaps is compared, and the display item is displayed most. A thinning-out processing means for thinning out display items other than the display item corresponding to the scale is small point, the map display formed by the predetermined scale, in the display item extracted by the display item extraction process unit, wherein An information providing system comprising: drawing processing means for drawing display items other than the display items thinned out by the thinning processing means . The said display item extraction process means extracts the said display item based on the display scale set by the said display reference value setting process means, and the display scale preset for every point in map data. Information provision system . Information providing system according to claim 1 or 2 before Symbol point determination condition is satisfied when the predetermined point is utilized. The point determination conditions are: when a predetermined point is set as a destination, when a vehicle stops at a predetermined stop-off facility, when there is an interchange getting on and off, when a vehicle stops at a stop-by area, and when the vehicle is a junction The information providing system according to claim 3 , wherein the information providing system is established in at least one of cases of passing through. The computer determines whether or not a predetermined point determination condition is satisfied, and increases the priority of the point where the point determination condition is satisfied. Display reference value setting processing means for setting a display scale representing the scale of the widest map among the maps on which the corresponding display items are displayed, as a point where the display item should be displayed on a display map formed at a predetermined scale Display item extraction processing means for extracting a display item corresponding to a point where the display scale is equal to or smaller than the predetermined scale, and determining whether or not an overlap occurs in the display items extracted by the display item extraction processing means. Overlap determination processing means, when an overlap occurs in the display item, comparing the display scale of each point where the overlap occurs in the display item, Also thinning processing means thins out display items other than the display item corresponding to the small point display scale, and the map display, which is formed by the predetermined scale, in the display item extracted by the display item extraction processing unit A program causing a display item other than the display item thinned out by the thinning processing unit to function as a drawing processing unit.

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