JP4292887B2 - Navigation system and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a navigation system and a program.
[0002]
[Prior art]
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 current location, a map around the current location, and the vehicle direction are displayed on the map screen. It is displayed. Therefore, the driver who is an operator can drive the vehicle according to the current location displayed on the map screen, the map around the current location, and the direction of the vehicle.
[0003]
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. Then, the searched route, that is, the searched route is displayed together with the destination on the map screen. Therefore, the driver can drive the vehicle according to the displayed search route. When the driver inputs a departure point different from the current location, a route from the input departure point to the destination is searched.
[0004]
By the way, if there are many display items on the map screen, it is difficult to see the map. Therefore, the display item with high publicity is displayed in an enlarged manner with priority over the display item with low publicity (see, for example, Patent Document 1), or priority information is added to the character, and the priority information is displayed. Accordingly, the characters are preferentially displayed on roads, facilities, etc. (see, for example, Patent Document 2).
[0005]
[Patent Document 1]
JP 2002-131068 A
[0006]
[Patent Document 2]
JP 2003-50132 A
[0007]
[Problems to be solved by the invention]
However, in the conventional navigation system, the character of a predetermined display item is preferentially displayed regardless of the intention of the driver who is an operator. Cannot be easily recognized.
[0008]
Therefore, it becomes difficult to grasp the current location or set the destination by using the display item intended by the driver as a landmark.
[0009]
The present invention solves the problems of the conventional navigation system and can easily grasp the current location or set the destination by using the display item intended by the driver as a landmark. The purpose is to provide.
[0010]
[Means for Solving the Problems]
For this purpose, in the navigation system of the present invention, a search processing means for searching for a predetermined point based on search data and a display item on the map screen based on the name of the searched point in the search data. Priority change processing means for changing the priority included in the facility character data corresponding to the searched location among the facility character data for use, and a high priority when overlap occurs in the facility character data Data selection processing means for selecting facility character data, and drawing processing means for drawing display items for the selected facility character data.
The priority change processing means, when there is facility character data representing a name that matches the name of the searched spot, the priority of the facility character data representing the name that matches the name of the searched spot To increase.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0016]
FIG. 1 is a block diagram showing a navigation system according to an embodiment of the present invention.
[0017]
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 detection unit for detecting the current location, map data, road data, It functions as a computer based on basic information of the navigation device 14 such as search data, that is, a data recording unit 16 as an information recording unit in which various information is recorded in addition to navigation information, various programs, data, and the like. Based on the input information, the navigation processing unit 17 that performs various arithmetic processing such as navigation processing, the direction sensor 18 as the direction detection unit that detects the vehicle direction, and the driver who is the operator operate The operation unit 34 as a first input unit for performing a predetermined input is displayed on a screen (not shown). Various displays by images, a display unit 35 as a first output unit for notifying the driver, a voice input unit 36 as a second input unit for performing predetermined input by voice, and various by voice Is provided with a voice output unit 37 as a second output unit for notifying the driver, and a communication unit 38 as a transmission / reception unit functioning as a communication terminal. A display unit 35, an audio input unit 36, an audio output unit 37, and a communication unit 38 are connected. The navigation processor 17 is also connected with a vehicle speed sensor 41 as a vehicle speed detector.
[0018]
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.
[0019]
Note that a distance sensor, a steering sensor, an altimeter, or the like (not shown) can be used alone or in combination as the current location detection unit instead of the GPS sensor 15. The distance sensor detects a distance between predetermined points on the road, and calculates a distance based on a rotational speed of a wheel (not shown) or by integrating acceleration twice. The steering sensor detects a rudder angle, for example, an optical rotation sensor attached to a rotating part of a steering wheel (not shown), a rotation resistance sensor, an angle sensor attached to a wheel, etc. Can be used.
[0020]
Further, a gyro sensor, a geomagnetic sensor, or the like can be used as the direction sensor 18. As the gyro sensor, for example, a gas rate gyro, a vibration gyro, or the like is used, and the vehicle direction is detected by integrating the turning angle. The geomagnetic sensor detects the direction of the vehicle by measuring the geomagnetism.
[0021]
The data recording unit 16 includes a database including data files such as a map data file, an intersection data file, a node data file, a road data file, a search data file, a facility data file, a character data file, and a landmark data file, In each data file, data for outputting various images to the display unit 35 is recorded. The data recording unit 16 also records data for outputting predetermined information by the audio output unit 37.
[0022]
For example, the map data file contains map data for displaying a map, the intersection data file contains intersection data related to each intersection, the node data file contains node data related to node points, and the road data file contains road data related to roads. The search data file contains search data for searching for a route, the facility data file contains facility data relating to various facilities, and the character data file contains character data for displaying characters on various screens. In the landmark data file, landmark data for displaying landmarks (landmarks) on various screens are recorded, and roads representing road conditions by the intersection data, node data, road data, search data, etc. Status data is constructed.
[0023]
The intersection data includes data representing the name of the intersection, the shape of the intersection, the main facility adjacent to the intersection, the name of the main place ahead of the intersection, and the like. In addition, the node data includes data representing an actual road branch point (including an intersection, a T-junction, and the like), a node point, a link between node points that connect the node points, and the like.
[0024]
The road data includes the width, slope, cant, bank, road surface condition, road lane number, number of lanes where the number of lanes decreases, part where the width becomes narrow, etc. , Radius of curvature, intersections, T-shaped roads, corner entrances, road attributes, downhill roads, uphill roads, etc., road types, national roads, prefectural roads, narrow streets, highways, urban highways Data representing expressways and toll roads such as roads and toll roads are included. Further, the road data includes data indicating level crossings, highway entrance and exit roads (rampways), highway / toll road tollgates, and the like. The facility data includes data representing facilities such as name, address, telephone number, and facility guidance for facilities such as hotels, gas stations, parking lots, sightseeing spots, and department stores in each region.
[0025]
The navigation processing unit 17 includes an arithmetic device that controls the entire navigation device 14 and a CPU 31 as a control device, and a DRAM as a first recording medium used as a working memory when the CPU 31 performs various arithmetic processes. In addition to the RAM 32 such as SRAM, MRAM, and FeRAM, a control program, a ROM 33 as a second recording medium on which various programs for searching a route to the destination, route guidance, and the like are recorded, A flash memory (not shown) is provided as a third recording medium used for recording data, programs, and the like. A semiconductor memory, a magnetic core or the like is used as an internal storage device such as the RAM 32, ROM 33, flash memory or the like.
[0026]
An MPU or the like can be used instead of the CPU 31 as the arithmetic device and the control device.
[0027]
The data recording unit 16 includes a magnetic disk (not shown) such as a hard disk or a flexible disk as a fourth recording medium arranged as an external storage device for recording the various data. A head (not shown) such as a read / write head for reading or writing the data is provided. Similarly, the data recording unit 16 includes a magnetic tape, a magnetic drum, a CD, an MD, a DVD, an optical disk, an MO, an IC card, an optical card, and the like as a fifth recording medium disposed as an external storage device. You can also
[0028]
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, data, etc. 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.
[0029]
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. A keyboard, a mouse, a barcode reader, a light pen, a remote control device for remote control, a joystick, etc., which are arranged independently of the display unit 35, can be used. 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. Can do.
[0030]
As the display unit 35, a display such as a CRT display, a liquid crystal display, or a plasma display can be used, or a hologram device that projects a hologram on a windshield of a vehicle can be used. The current location, map, search route, guidance information along the search route, traffic information, etc. are displayed on various screens formed on the display unit 35, and characteristic photographs and frame diagrams at the intersection or the search route are displayed. In addition to displaying the distance to the next intersection and the direction of travel at the next intersection, etc., operation guidance for the image operation unit, operation unit 34, voice input unit 36, etc., operation menu, key guidance, etc. Or FM multiplex broadcast programs or the like can be displayed.
[0031]
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. . In addition to the voice synthesized by the voice synthesizer, various sounds, various guidance information recorded in advance on a tape, a memory, and the like can be output.
[0032]
The communication unit 38 receives various kinds of information transmitted from a road traffic information center such as a VICS (registered trademark: Vehicle Information and Communication System) center as a first information provider, and radio waves arranged along the road. A beacon receiver for receiving as a radio wave beacon, an optical beacon, etc. via a beacon device, an optical beacon device, etc., an FM receiver for receiving as an FM multiplex broadcast via an FM broadcast station, etc. are provided. 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.
[0033]
The communication unit 38 can also receive various data such as D-GPS information for detecting a detection error of the GPS sensor 15 transmitted from a predetermined base station. Further, the communication unit 38 can receive position information by radio wave beacons, optical beacons, and the like to detect the current location. In this case, the beacon receiver functions as a current location detection unit.
[0034]
Furthermore, the communication part 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.
[0035]
The navigation device 14, the information center 51, the network 43, etc. constitute a navigation system, and various types of information are transmitted and received between the communication unit 38 and a communication unit (not shown) of the information center 51.
[0036]
In the present embodiment, in order for the communication unit 38 to function as a communication terminal, a communication device such as a mobile phone is built in the communication unit 38 as a module. It is also possible to connect devices and connect the communication device and the communication unit 38. In that case, as a communication device, a mobile phone such as a mobile phone, a car phone, or a PHS, a wireless LAN card, or the like is used, a personal computer, a portable computer, a personal digital assistant (PDA), an electronic notebook, or a video phone. A game machine or the like having a communication function can be used.
[0037]
The network 43 includes a LAN (Local Area Network), a WAN (Wide Area Network), an intranet, a mobile phone network, a telephone network, a public communication network, a dedicated communication network, a communication network such as the Internet, etc. Communication means can be used. Communication means using CS broadcasting, BS broadcasting, terrestrial digital television broadcasting, FM multiplex broadcasting, etc. by a broadcasting satellite can also be used. Furthermore, it is possible to use communication means such as a non-stop automatic toll payment system (ETC) and a boundary communication system (DSRC) that are used in an intelligent road traffic system (ITS).
[0038]
The information center 51 may be operated by any one of an individual, a company, an organization, a local government, a government-related organization, or the like, and may be operated by the VICS (registered trademark) center.
[0039]
The information center 51 includes a server 53, a database (DB) 57 serving as an information recording unit connected to the server 53, the communication unit, and the like. Two-way communication is performed, and traffic information, general information, and the like are provided. For this purpose, the server 53 includes a CPU 54, a RAM 55, a ROM 56, and the like as an arithmetic device and a control device, and functions as a computer based on predetermined programs, data, and the like. Further, the same data as various data (including navigation information) recorded in the data recording unit 16 can be recorded in the database 57. 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.
[0040]
Then, the CPU 54 receives traffic information, general information, etc. transmitted from the VICS (registered trademark) center, etc., and records it in the database 57 as primary information, or processes the primary information to perform statistical processing, Statistical data constituting history information indicating the history of the traffic jam status, traffic jam prediction information for predicting the traffic jam status, and the like are created, and the statistical data is recorded in the database 57 as secondary information. In this embodiment, in creating the statistical data, detailed conditions such as date and time, day of the week, weather, various events, seasons, facilities (the presence or absence of large facilities such as department stores and supermarkets) are added to the history information. It is done.
[0041]
Next, a basic operation of the navigation system having the above configuration will be described.
[0042]
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. The matching processing means (not shown) of the CPU 31 performs matching processing, and based on the trajectory of the read current location and the shape, arrangement, etc. of each road link constituting the surrounding road, The current location is specified by determining whether the current location is located.
[0043]
Subsequently, an information acquisition processing unit (not shown) of the CPU 31 performs an information acquisition process and acquires the navigation information by reading it from the data recording unit 16 or by receiving it from the information center 51 via the communication unit 38. To do. When acquiring from the information center 51, the information acquisition processing means downloads the received navigation information to a flash memory, a hard disk or the like. In addition, when the navigation information is acquired via the communication unit 38, the program can also be acquired.
[0044]
A display processing means (not shown) of the CPU 31 performs display processing, forms a map screen on the display unit 35, and displays the current location, a map around the current location, and the vehicle direction on the map screen. Accordingly, the driver can drive the vehicle according to the current location, the map around the current location, and the direction of the vehicle.
[0045]
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. In addition, a predetermined point can be registered as a memory point in advance, and the registered memory point can be input as a destination.
[0046]
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 starting point represented by the current location to the destination is searched, and route data representing the searched route is output.
[0047]
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.
[0048]
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.
[0049]
By the way, in the navigation device, as described above, when a predetermined point is set as a destination or a predetermined point is registered as a memory point, a point intended by the driver can be searched. It is like that. When the driver inputs search conditions such as Japanese syllabary, address, telephone number, and genre of facility, the search processing means (not shown) of the CPU 31 performs search processing, and the driver intends according to the search conditions. Search for a point.
[0050]
Next, the operation of the display process will be described.
[0051]
FIG. 2 is a flowchart showing an operation of display processing in the embodiment of the present invention, and FIG. 3 is a diagram showing an example of a map screen in the embodiment of the present invention.
[0052]
First, the display processing means reads the current location detected by the GPS sensor 15 (FIG. 1), and confirms the map scale of the current location recorded in the RAM 32 based on the current location. Subsequently, the data acquisition processing means of the display processing means performs data acquisition processing and reads out map data around the current location corresponding to the scale from the data recording unit 16. In this case, as shown in FIG. 3, the map data includes background data, road data, facility data, and the like necessary for displaying a map around the current location on the map screen.
[0053]
Subsequently, the screen formation processing means of the display processing means performs screen formation processing, forms a map screen on the display unit 35, and displays a map around the current location according to the map data.
[0054]
By the way, in the present embodiment, on the map screen, the vehicle position mark Pr indicating the current location and the search route Rt are displayed on the map around the current location, and the main prefectures, municipalities, etc. Administrative divisions and names of map elements such as main roads, intersections, railways, mountains, rivers, bridges (character strings, ie, character strings m1 and m2 in FIG. 3) are displayed. The map screen also includes landmarks representing major facilities (indicated by a mark r1 in FIG. 3), names of facilities (indicated by character strings m3 to m7 in FIG. 3), and the like. Is displayed. The first display item is configured by the name, and the second display item is configured by the landmark.
[0055]
In this case, when displaying names, landmarks, etc. on the map screen, two or more names, landmarks, etc. overlap (names overlap, landmarks overlap, and names overlap with landmarks). When displayed, it becomes difficult to recognize names, landmarks, etc. on the map screen. Therefore, when it is determined that two or more names, landmarks, and the like overlap, one name, landmark, etc. is preferentially displayed.
[0056]
For this purpose, the data acquisition processing means obtains, from the data recording unit 16, landmark data for displaying landmarks as images, and character data for displaying the names of the map elements and facilities as strings. Read out as facility character data. The landmark data includes, for each facility, a facility number, data amount, priority, color image data for forming a landmark image, position data including XY coordinates representing the landmark position on the map screen, and the like. Including. The character data includes, for each character string, character string number, data amount, priority, number of characters, character type, character color, position data including XY coordinates representing the position of the name, character code string, etc. including.
[0057]
Subsequently, the data selection processing means of the display processing means performs data selection processing, reads the priority set in advance for the facility character data, and based on each position data of the landmark data and character data, Determine whether overlap occurs in the facility character data. In this case, when the XY coordinates representing the position of the landmark and the XY coordinates representing the name position overlap, an overlap occurs in the facility character data, and if the landmark, name, etc. are displayed as they are, the landmark, name Etc. at least partially overlap.
[0058]
Therefore, when an overlap occurs in the facility character data, the data selection processing means of the display processing means compares the priorities of two or more facility character data in which the overlap occurs in the facility character data, Select the facility character data with the highest priority.
[0059]
Subsequently, the drawing processing means of the display processing means performs a drawing process to draw the landmark, name, etc. of the selected facility character data. In this way, landmarks, names, etc. of facility character data with high priority can be displayed on the map screen. The landmarks, names, etc. of the facility character data with low priority are not displayed on the map screen, or only a part of the landmarks, names, etc. are displayed.
[0060]
Next, the flowchart of FIG. 2 will be described.
Step S1: Read the current location.
Step S2: Check the map scale of the current location.
Step S3 Map data is read out.
Step S4 A map is displayed.
Step S5: Read facility character data.
Step S6: Read the priority of the facility character data.
Step S7: It is determined whether or not an overlap occurs in the facility character data. If overlap occurs in the facility character data, the process proceeds to step S8, and if not, the process proceeds to step S9.
Step S8: Select facility character data with high priority.
Step S9: The landmark, name, etc. are drawn, and the process ends.
[0061]
By the way, if the landmark, name, etc. are prioritized regardless of the driver's intention, the driver cannot easily recognize the intended landmark, name, etc. Therefore, it becomes difficult to grasp the current location and set the destination using the landmark, name, etc. as a landmark.
[0062]
When the driver sets a predetermined point as a destination or registers as a memory point, the point is searched by the search processing means as described above. The searched points are often set repeatedly as destinations.
[0063]
Therefore, the priority is changed for the point searched by the search process, and the landmarks, names, etc. relating to the points searched by the search process are preferentially displayed.
[0064]
FIG. 4 is a flowchart showing the operation of priority change processing according to the embodiment of the present invention.
[0065]
First, when the search processing is performed by the search processing means, the priority change processing means performs the priority change processing, and is made up of map element data, facility data, and the like representing the map elements of the points searched in the search processing. Data is read from the data recording unit 16. The map element data in the search data includes data such as a map element number that identifies the map element, a data amount, a name of the map element, and coordinates representing the position of the map element on the earth.
[0066]
Further, the facility data in the search data includes a facility number, a chain ID indicating the chain number of the facility, a genre ID indicating the genre of the facility, a data amount of the facility data, a name, an address, a telephone number, and the earth of the facility. It includes data such as coordinates representing the upper position and guidance information.
[0067]
The priority change processing means determines whether the searched point is a map element or a facility. If the searched point is a map element, priority of facility character data representing the map element is given priority. Increase the degree.
[0068]
In addition, when the searched point is a facility, the chain specifying processing unit of the priority change processing unit performs chain specifying processing, the facility at the searched point belongs to the chain store, and the facility data is the chain store number. If it has a chain ID, the priority of the facility character data representing the facility specified by the chain ID is increased.
[0069]
In addition, when the facility at the searched point does not belong to the chain store and the facility data does not have a chain ID, the name specifying processing unit of the priority change processing unit performs the name specifying process, and the facility at the searched point It is determined whether there is facility character data that matches (text match) with the name of. If there is facility character data that matches the name of the facility at the searched point, the name identification processing means extracts facility character data that matches the name of the facility at the searched point.
[0070]
Subsequently, the genre specifying processing means of the priority change processing means performs genre specifying processing, and whether or not the facility at the searched point belongs to a plurality of genres and the facility data has a genre ID indicating a genre number. If it is determined and has a genre ID, the priority of the facility character data representing the facility specified by the genre ID is increased. If the genre ID is not included, the non-specific processing unit of the priority change processing unit performs non-specific processing to increase the priority of the facility character data representing the facility at the searched location.
[0071]
On the other hand, if there is no facility character data that matches the name of the facility at the searched point, the genre specifying processing unit determines whether the facility data at the searched point has a genre ID and has a genre ID. In this case, the priority of the facility character data representing the facility specified by the genre ID is increased. If the genre ID is not included, the non-specific processing means performs non-specific processing to increase the priority of the facility character data representing the facility at the searched location.
[0072]
Thus, in this embodiment, since the priority of the facility character data corresponding to the searched point is increased, the driver can easily recognize the intended landmark, name, etc. on the map screen. it can.
[0073]
Therefore, it is possible to easily grasp the current location or set the destination by using the landmark, name, etc. intended by the driver.
[0074]
In addition, when the facility belongs to a chain store, the landmarks, names, etc. of all chain stores are not given priority, but the landmarks, names, etc. of only the chain stores specified by the chain ID are given priority. Using the name or the like as a landmark, the user can easily grasp the current location or set the destination.
[0075]
Since the name that matches the name of the facility character data is given priority, it is possible to easily grasp the current location or set the destination by using the name as a mark.
[0076]
Furthermore, when facilities belong to a plurality of genres, landmarks, names, etc. are not given priority over all genres, but only landmarks, names, etc. specified by the genre ID are given priority. Etc. as a landmark, it is possible to easily grasp the current location or set the destination.
[0077]
Next, the flowchart of FIG. 4 will be described.
Step S11: The search data of the searched point is read.
Step S12: It is determined whether the facility data at the searched point has a chain ID. If the facility data of the searched point has the chain ID, the process proceeds to step S13, and if not, the process proceeds to step S14.
Step S13: The priority of the facility character data representing the facility identified by the chain ID is increased, and the process is terminated.
Step S14: It is determined whether there is facility character data that matches the name of the facility at the searched location. If there is facility character data that matches the name of the facility at the searched location, the process proceeds to step S15, and if not, the process proceeds to step S19.
Step S15: The matching facility character data is extracted.
Step S16: It is determined whether the facility data of the searched point has a genre ID. If the facility data of the searched point has the genre ID, the process proceeds to step S17, and if not, the process proceeds to step S18.
Step S17: The priority of the facility character data representing the facility specified by the genre ID is increased, and the process is terminated.
Step S18: The priority of the facility character data representing the facility at the searched location is increased, and the process is terminated.
Step S19: It is determined whether or not the facility data at the searched point has a genre ID. If the facility data of the searched point has the genre ID, the process proceeds to step S20, and if not, the process proceeds to step S21.
Step S20: The priority of the facility character data representing the facility specified by the genre ID is increased, and the process is terminated.
Step S21: The priority of the facility character data representing the facility at the searched location is increased, and the process is terminated.
[0078]
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.
[0079]
【The invention's effect】
As described above in detail, according to the present invention, the priority included in the facility character data is changed based on the name of the searched point in the search data, and overlap occurs in the facility character data. In this case, the facility character data with high priority is selected and the display item is drawn, so that the driver can easily recognize the intended display item on the map screen.
[0080]
Therefore, it is possible to easily grasp the current location or set the destination by using the display item intended by the driver as a landmark.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a navigation system in an embodiment of the present invention.
FIG. 2 is a flowchart showing an operation of display processing in the embodiment of the present invention.
FIG. 3 is a diagram showing an example of a map screen in the embodiment of the present invention.
FIG. 4 is a flowchart showing an operation of priority change processing according to the embodiment of the present invention.
[Explanation of symbols]
14 Navigation device
17 Navigation processor
43 Network
51 Information Center
53 servers

Claims (2)

Search processing means for searching for a predetermined point based on the search data, and the facility character data for displaying the display item on the map screen based on the name of the searched point in the search data. A priority change processing means for changing the priority included in the facility character data corresponding to the spot, and a data selection processing means for selecting facility character data having a higher priority when an overlap occurs in the facility character data. And a drawing processing means for drawing a display item for the selected facility character data, and the priority change processing means, when facility character data representing a name that matches the name of the searched spot exists. A navigation system characterized by increasing the priority of facility character data representing a name that matches the name of a searched point . Of the facility character data for displaying the display item on the map screen based on the name of the searched point in the search data , search processing means for searching the computer for a predetermined point based on the search data , Priority change processing means for changing the priority included in the facility character data corresponding to the searched location, and data selection processing means for selecting facility character data having a high priority when overlapping occurs in the facility character data When the facility character data representing the name that matches the name of the searched point exists, the priority change processing unit functions as a drawing processing unit that draws a display item for the selected facility character data. And increasing the priority of the facility character data representing the name that matches the name of the searched point .

Images