JP4162866B2 - Car navigation system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle navigation device that guides a vehicle to a destination according to a guidance route, and in particular, displays a building, a facility, and other various properties that serve as landmarks when the vehicle travels on a display screen (hereinafter, “3D display”). The present invention relates to an in-vehicle navigation device having a function of displaying each property name in association with the property when the property name is displayed.
[0002]
Unless otherwise defined in the following description, the term “vehicle” simply refers to the own vehicle.
[0003]
[Prior art]
Conventional typical vehicle-mounted navigation devices include map data storage devices such as CD-ROMs and DVD-ROMs that store map data, display devices, gyros, GPS (Global Positioning System) receivers, and vehicle speed sensors. Vehicle movement detection means for detecting the current position and current direction is provided. Then, map data around the current position of the vehicle is read from the map data storage device, a map image is displayed on the display screen based on the map data, and a vehicle position mark (own vehicle) is displayed at a predetermined location on the map image. Mark) is displayed in a superimposed manner, and as the current position changes according to the movement of the vehicle, the map image is fixed on the screen and the vehicle position mark is moved, or the vehicle position mark is fixed at a predetermined position such as the center of the screen. Then, the map image is scrolled and displayed so that it is always possible to know at a glance where the vehicle is currently traveling.
[0004]
Also, in-vehicle navigation devices are usually equipped with a function (route guidance function) that guides a user so that the user can easily travel on a desired destination without making a mistake. According to this route guidance function, an optimal route (for example, the route with the lowest cost) connecting from the departure point (for example, the current position of the vehicle) to the destination using the map data is searched for by the horizontal search method, Dijkstra method, etc. The calculated route is automatically searched, the searched route is stored as a guide route, and the guide route can be distinguished from other roads on the map image while traveling (for example, the color is changed, When the vehicle approaches a predetermined distance to the intersection where the course should be changed on the guidance route, a guide map of the intersection (an enlarged view of the intersection and the intersection) is displayed on the map image. Or an arrow indicating the traveling direction of the user), the user can grasp the optimum route to the destination.
[0005]
When searching for a route, the user sets a destination in advance, and further sets a passing point on the way to the destination (that is, which route goes to the destination) as necessary. Also, if necessary, various conditions (whether priority is given to toll roads or priority is given to general roads, which of the reductions in travel distance or travel time is prioritized) are also set. The navigation device searches for a plurality of routes to the destination based on the set data, displays the searched routes in different colors, for example, and provides route guidance according to one route selected by the user. .
[0006]
In recent years, map data storage devices such as CD-ROMs in in-vehicle navigation devices include not only map data but also information such as business types, addresses, telephone numbers, etc. regarding various properties such as stores, banks, companies, and public facilities (so-called “ Some town page information ") is included. The town page information can be used to search for a desired property designated by the user on the display screen.
[0007]
In addition, as a display method for providing map information to a user in a conventional in-vehicle navigation device, there is a so-called 3D display for displaying a map in three dimensions. In this 3D display, various properties such as buildings and facilities designated by user settings, roads, and the like are displayed three-dimensionally on the screen, and the display is performed as if the building is actually running in a turbulent building. Is called.
[0008]
[Problems to be solved by the invention]
According to the in-vehicle navigation device having a 3D display function, buildings, roads, and the like are three-dimensionally displayed as described above, so that the user can feel as if he or she is actually traveling in a valley of buildings. Can be given. At this time, it is normal for the user to drive the vehicle with various properties such as buildings and facilities displayed in 3D as landmarks. In this case, if the user is not aware of what the property is currently watching, that is, what the name (property name) of the property is, the vehicle cannot travel smoothly. For this reason, when various properties such as buildings and facilities are displayed in 3D on the screen, it is conceivable to display the property name of the property in association with the display of each property.
[0009]
However, none of the conventional in-vehicle navigation devices having a 3D display function has a function of displaying a property name for a property displayed in 3D on the screen.
In addition, some of the conventional in-vehicle navigation devices having a function of displaying a property such as a building in a plane have a function of additionally displaying a property name in association with the display of the property. This was based solely on the notation for a planar map.
[0010]
As described above, in the in-vehicle navigation device having the conventional 3D display function, the property name is not displayed in association with the property displayed in 3D on the screen. When the screen is viewed, it is impossible to immediately recognize what each property is, and thus there is a problem in that smooth running of the vehicle is affected.
[0011]
An object of the present invention is to provide an in-vehicle navigation device having a function of three-dimensionally displaying various properties such as buildings and facilities that serve as landmarks when a vehicle travels on a display screen in view of the above-described problems in the prior art. The property name is displayed in a unified display on the leader line attached to the property name display range that designates each property so that the user can easily see the correspondence between each property and the property name. In other words, it is possible to contribute to smooth vehicle travel.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, according to the present invention, information input means for inputting information related to map display specified by the user, display means for providing guide information to the user via the screen, and building Data storage means storing map data including property drawing data including property name, coordinate data, and attribute data for each property and other various properties, and the information input means, display means, and data storage means are operable respectively. Connected display control means, the display control means based on the property drawing data stored in the data storage means when the three-dimensional map display is designated via the information input means, On the display means screen, On the front side of the vehicle position The property with a predetermined number of floors or more is displayed in 3D, the property name is displayed on the upper left side or the upper right side of the property, and the lead line attached to the display range of the property name is the center position of the upper surface of the property. Above There is provided an in-vehicle navigation device that is displayed in a specific display mode that is drawn from the center position of the upper surface of the property along a straight line connecting the center of the vehicle position.
[0013]
According to the vehicle-mounted navigation device according to the present invention, the vehicle is traveling. On the front side of the vehicle When three-dimensionally displaying a property of a predetermined number of floors or more as a landmark, the property name of the property is the name of the display position of the property. Diagonally upper left or diagonally upper right In addition, the lead line attached to the display range of the property name is displayed in the above specific display mode.
As a result, the display range of each property name when viewed from the user (vehicle position) Attached to Leader line display How to Can have a sense of unity, and the correspondence between each property and the property name (display range of the property name) can be immediately and easily grasped. This contributes to smooth vehicle travel.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram showing the overall configuration of an in-vehicle navigation device according to an embodiment of the present invention.
In the figure, reference numeral 1 denotes a CD-ROM storing map data, and the map stored here is appropriate for each scale level such as 1/1500, 1/25000, 1 / 50,000, 1/10000, etc. The roads, buildings, facilities, and other various properties included in this map are stored as a coordinate set of points (nodes) expressed in longitude and latitude. Yes. A road is composed of two or more nodes connected to each other, and a portion connecting two nodes is called a “link”. The map data includes (1) a road layer composed of a road list, a node table, an intersection configuration node list, etc., (2) a background layer for displaying roads, buildings, parks, rivers, etc. on a map image ( 3) It is composed of a character / symbol layer or the like for displaying a letter indicating an administrative division name such as a municipality name, a road name, an intersection name, names of various properties (property name), a map symbol, or the like.
[0015]
Reference numeral 2 denotes an operation unit for operating a navigation apparatus main body 10 to be described later, 3 denotes a communication device such as an in-vehicle telephone for communicating with various service centers, etc., 4 denotes a VICS (VICS (received from a radio wave beacon or an optical beacon). Road traffic information communication system) VICS receiver that receives information, 5 is a GPS receiver that receives GPS signals sent from GPS satellites and detects the longitude and latitude of the current position of the vehicle, 6 is a self-contained navigation sensor Show. The self-contained navigation sensor 6 is composed of an angle sensor 6a such as a gyro for detecting the vehicle direction, and a distance sensor 6b that generates a pulse for every predetermined traveling distance. Reference numeral 7 denotes a liquid crystal display device. Under the control of the navigation device body 10, a map around the current position of the vehicle, a guide route from the departure point to the destination, a vehicle position mark, and other guidance information. Etc. are displayed on the screen. Reference numeral 8 denotes a speaker for providing guidance information to the user by voice.
[0016]
In the navigation apparatus main body 10, reference numeral 11 denotes a buffer memory for temporarily storing map data read from the CD-ROM 1 under the control of the control unit 17 described later, and 12, 13, 14, 15 and 16 are respectively operated. The interface (I / F) connected to the part 2, the communication apparatus 3, the VICS receiver 4, the GPS receiver 5, and the self-contained navigation sensor 6 is shown. Reference numeral 17 denotes a control unit constituted by a microcomputer. The control unit 17 has a built-in navigation program (a program for performing display output control necessary for route search processing and route guidance based on the program). According to this program, the GPS receiver 5 and the autonomous navigation are provided. Based on the signal output from the sensor 6, the current position of the vehicle is detected, the map data to be displayed is read from the CD-ROM 1 to the buffer memory 11, or the map data read to the buffer memory 11 is used. Various processes related to navigation, such as searching for a guidance route from the departure point (current position of the vehicle) to the destination under the set search conditions, are performed.
[0017]
Reference numeral 18 denotes a map drawing unit that performs a map image drawing process using map data read out to the buffer memory 11 under the control of the control unit 17, and 19 denotes various menu screens (operation screens) according to the operation status. ), An operation screen / mark generating unit for generating various marks such as a vehicle position mark and a cursor, and 20 denotes a guidance route storage unit for storing guidance route data. In this guidance route storage unit 20, data on all nodes (coordinates of points expressed in longitude and latitude) from the starting point to the destination of the guidance route searched by the control unit 17 and changed during the search. Guide route data is recorded. Further, 21 is a guidance route drawing that reads the guidance route data from the guidance route storage unit 20 under the control of the control unit 17 and draws the guidance route in a display mode (color, line width, etc.) different from other roads. Reference numeral 22 denotes an audio output unit that outputs an audio signal to the speaker 8 based on a signal from the control unit 17. Reference numeral 23 denotes an image composition unit. The map image drawn by the map drawing unit 18 is guided to the guide route drawn by the guide route drawing unit 21, the operation screen generated by the operation screen / mark generation unit 19, and various marks. Are appropriately stacked and displayed on the screen of the display device 7.
[0018]
FIG. 2 shows an external configuration of a remote control transmitter constituting the operation unit 2.
As shown in the figure, the remote control transmitter 30 is provided with a joystick 31, a “decision” button 32, a “menu” button 33, a “return” button 34, and other various operation buttons. The joystick 31 and the “OK” button 32 are integrally configured. By tilting the joystick 31 up and down, left and right, various menus and various items displayed on the screen of the display device 7 can be selected or displayed on the screen. The cursor can be moved (screen scrolling), and by pressing the “OK” button 32, the selected menu or the like can be executed, or an arbitrary point on the map image can be designated. . The “menu” button 33 is operated to display a desired main menu / submenu on the screen, and the “return” button 34 is operated to return to the previous screen.
[0019]
FIG. 3 shows the data structure of the property drawing data (polygon data for drawing buildings, facilities, and other various properties) included in the map data stored in the CD-ROM 1.
As shown in FIG. 3A, polygon data for drawing a building or the like is expressed as a set of a plurality of nodes (G1 to G6 in the illustrated example), and an end point (G6) and a start point (G1) are represented. Connected to form a closed figure. As shown in FIG. 3B, the polygon data (property drawing data) includes data indicating the property name, attribute data, and coordinate data. The attribute data includes data indicating the polygon type, outline color, line type (solid line, broken line, line width, etc.), node color, and fill color (color inside the polygon). In the case of a property (a property to which town page information is added), the property number and the floor number of the building are included for each property. That is, the polygon data is linked to the town page information through the property number. The coordinate data includes the coordinates of the polygon nodes G1 to G6.
[0020]
In the configuration according to the present embodiment, the CD-ROM 1 is a “data storage unit”, the operation unit 2 is an “information input unit”, the display device 7 is a “display unit”, and the control unit 17 and the image composition unit 23 are “ It corresponds to “display control means”.
As described later, the vehicle-mounted navigation device according to the present embodiment is basically the same as the conventional vehicle-mounted navigation device except that the operation mode when the city map is three-dimensionally displayed (3D display) is different. The following operations are performed.
[0021]
That is, the control unit 17 detects the current position of the vehicle based on the GPS signal received by the GPS receiver 5 and the signal detected by the self-contained navigation sensor 6. Then, map data around the current position of the vehicle is read from the CD-ROM 1 and stored in the buffer memory 11. The map drawing unit 18 generates a map image based on the map data read to the buffer memory 11 and displays a map image around the current position of the vehicle on the display device 7.
[0022]
Further, the control unit 17 detects the current position of the vehicle based on signals output from the GPS receiver 5 and the self-contained navigation sensor 6 as the vehicle moves, and displays it on the display device 7 according to the detection result. The vehicle position mark is overlaid on the map image, and the vehicle position mark is moved as the vehicle moves, or the map image is scroll-displayed.
[0023]
Further, when the user operates the operation unit 2 (remote control transmitter 30) to set the destination, the control unit 17 sets the current position of the vehicle as the starting point, and the route with the lowest cost connecting the starting point to the destination. Is searched using the map data of the CD-ROM 1. Then, the route obtained by the search is stored as a guide route in the guide route storage unit 20, and the guide route is displayed on the map image. In addition, the control unit 17 appropriately outputs guidance information as the vehicle travels, and guides the vehicle to travel along the guidance route to the destination.
[0024]
As a basic feature of the in-vehicle navigation device according to the present embodiment, regarding the display of various properties such as buildings and facilities, only a property of a predetermined number of floors or more that serves as a mark when the vehicle is traveling is displayed in a three-dimensional display ( 3D display), and the property name indicating the property displayed in 3D is displayed in a specific display mode. The specific display mode is that each property name is displayed on the screen on the upper left side or the upper right side of the corresponding property, and the range in which each property name is displayed (hereinafter also referred to as “the property name display area”). .)) Is led out from the center of the top surface of the property along an extension line extending radially from the center of the vehicle through the center of the top surface of each property.
[0025]
Such a specific display mode is linked to the traveling of the vehicle. That is, the position of the vehicle changes as the vehicle travels (moves) and the 3D map display on the screen is updated, and the 3D displayed property and the corresponding property name display area The lead lines are displayed in the specific display mode described above.
In this way, a specific display mode (a mode in which the lead lines of each property name display area are displayed radially with the vehicle position at the center) gives a sense of unity to the display mode of the lead lines of each property name display area. be able to. As a result, when this screen is viewed while the vehicle is traveling, the correspondence between each property and the property name can be immediately and easily grasped, and as a result, it can contribute to smooth vehicle traveling.
[0026]
In addition, about the property below a predetermined number of floors, a normal planar display is performed. The “predetermined floor number” of the property that is a determination criterion for performing 3D display or planar display for each property is specified based on user settings from the operation unit 2 (remote control transmitter 30). The reason why the number of 3D-displayed properties is limited to some properties in this way is that when 3D display is performed for all properties, the screen becomes difficult to see.
[0027]
Further, as a further feature, when three-dimensional display (3D display) is performed for an article having a predetermined number of floors or more, the display is performed in a transmissive or semi-transmissive display mode. By adopting such a transmissive / semi-transmissive display mode, it is possible to visually recognize the shape of another property, a road, or the like located behind the property.
Further, when demarcating property name display areas for individual properties to be displayed in 3D, it is assumed that the property name display areas overlap each other if the properties are dense on the map image. In such a case, in this embodiment, the map image displayed on the screen is divided into a plurality of grids (display categories), and it is determined whether or not the property name display areas overlap for each grid. In this case, the property name (the property name display area and the lead line) is displayed for only one property according to a predetermined priority.
[0028]
In this case, the priority order related to the property name display is designated based on the user setting for each genre to which each property belongs. For example, public facilities (public cultural facilities, hospitals, schools, transportation facilities, etc.) are given the first priority, commercial facilities (large stores, small stores, banks, accommodation facilities, etc.) are given the second priority, and other facilities ( Office, factory, entertainment facility, restaurant, miscellaneous building, etc.) will be given the third priority.
[0029]
FIG. 4 shows a screen display example related to 3D map display performed by the navigation device of the present embodiment, and FIG. 5 is for supplementarily explaining a display method related to the screen display. For simplification of illustration, it is shown in the form of a plan view.
In the screen display example shown in FIG. 4, a vehicle position mark CM indicating the current position of the vehicle is superimposed on the map image 41 displayed three-dimensionally on the display screen 40, and at the same time specified by the user setting. The properties 42a to 42e having the number of floors or more are displayed in 3D in a transparent (or semi-transparent) display mode, and the property names indicating the 3D displayed properties 42a to 42e are displayed in a specific display mode.
[0030]
That is, on the display screen 40, the name of each property (XX post office, △ department store, XXX wholesale market, civic center, XX library) is displayed on the upper left side or the upper right side of the corresponding property 42a to 42e. And lead lines 44a to 44e attached to the property name display areas 43a to 43e along extension lines L1 to L5 extending radially from the center of the vehicle position (CM) through the center of the upper surface of each property. Each is displayed so as to be drawn from the center position of the top surface of the property (see FIG. 5).
[0031]
Hereinafter, the property name display process related to the three-dimensional map display performed by the vehicle-mounted navigation device according to the present embodiment will be described with reference to FIG. 6 showing an example of the process flow.
First, as an initial state before entering this processing flow, this navigation device responds to the destination input setting by the user via the operation unit 2 (remote control transmitter 30), and is similar to the conventional navigation device. It is assumed that a route search to a destination is performed by a technique (simulation calculation such as a horizontal search method or a Dijkstra method), and route guidance information based on the route search is provided to the user via the screen of the display device 7. .
[0032]
In the state in which the route guidance is performed in this way, first, in the first step S1, the control unit 17 displays the three-dimensional map display based on the output signals from the operation of the joystick 31 and various operation buttons from the remote control transmitter 30. It is determined whether it is designated (YES) or not (NO). If the determination result is YES, the process proceeds to step S2, and if the determination result is NO, the determination process is repeated.
[0033]
In the next step S2, a map image is displayed three-dimensionally on the screen of the display device 7 via the map drawing unit 18 and the image composition unit 23 based on the control from the control unit 17 (see FIG. 4). At this time, the map image displayed stereoscopically on the screen of the display device 7 is displayed by superimposing the vehicle position mark CM generated by the operation screen / mark generator 19 under the control of the controller 17. .
[0034]
In the next step S3, the map drawing unit 18 and the image composition are referred to by referring to the property drawing data (FIG. 3) included in the map data read from the CD-ROM 1 to the buffer memory 11 based on the control from the control unit 17. On the screen of the display device 7 via the unit 23, only the properties of a predetermined number of floors or more that serve as landmarks when the vehicle is traveling among the properties included in the map image are three-dimensionally displayed in a transparent or semi-transmissive display mode (FIG. 4). reference). At this time, other properties (fewer than a predetermined number of floors) are displayed in a plane. The criteria for determining whether the property is to be displayed three-dimensionally or planarly is specified based on the user settings from the remote control transmitter 30 as described above.
[0035]
In the next step S4, when the control unit 17 divides the map image displayed on the screen of the display device 7 into a plurality of grids (display sections), for example, an m × n matrix grid, for each grid. In addition, it is determined whether the property name display areas of the three-dimensionally displayed properties overlap (YES) or not (NO). When the property name display areas do not overlap (when the determination result is NO), the process proceeds to step S5, and when they overlap (when the determination result is YES), the process proceeds to step S6.
[0036]
In step S5, for each property that is stereoscopically displayed on the screen of the display device 7 via the map rendering unit 18 and the image composition unit 23 under the control of the control unit 17, the property rendering data (FIG. 3) is used. The property name indicating the property and the lead line attached to the property name display area are displayed in the specific display mode. That is, as illustrated in FIG. 4 and FIG. 5, the property names (property name display areas 43 a to 43 e) are displayed on the display screen 40 on the upper left side or the upper right side of the respective property 42 a to 42 e, The lead lines 44a to 44e attached to the property name display area are drawn from the center of the top surface of the property along the straight lines L1 to L5 connecting the center of the top surface of each property and the center of the vehicle position (CM). To display. Thereafter, this processing flow is “END”.
[0037]
On the other hand, in step S6, in the grid where the property name display areas overlap on the map image, the property name and the leader line attached to the property name display area are specified for only one property that complies with the predetermined priority order. Are displayed in the display mode (see FIGS. 4 and 5). Thereafter, this processing flow is “END”.
As described above, according to the in-vehicle navigation device according to the present embodiment, when various properties such as buildings that are marks when the vehicle is traveling are displayed in 3D on the screen, the property name of the property displayed in 3D 4 and 5 are displayed in a specific display manner as illustrated in FIG. 4 and FIG. 5, so that the display of the lead lines 44 a to 44 e in each property name display area is unified as viewed from the user (vehicle position). Can be given. As a result, when the user views the display screen 40 while the vehicle is traveling, the correspondence between the properties 42a to 42e and the property names (property name display areas 43a to 43e) can be immediately and easily grasped. . This contributes to smooth vehicle travel.
[0038]
In addition, when a property is displayed in 3D, the display is performed in a transparent or semi-transparent display mode, so when viewing the screen while the vehicle is running, other properties located behind the 3D display property. And the shape of a road or the like can be visually recognized.
Furthermore, since the number of properties to be displayed in 3D is limited to some properties (properties of a predetermined number of floors or more), it is possible to eliminate the difficulty in viewing the screen when 3D display is performed for all properties.
[0039]
In the above-described embodiment, the case where the display is performed in the transparent or semi-transparent display mode when the property is displayed in 3D has been described (see FIG. 4). However, the display mode of the property displayed in 3D is limited to this. Of course not. As is clear from the gist of the present invention (that is, the property name of the property to be displayed in 3D is displayed in a specific display mode as shown in FIGS. 4 and 5), the display mode is not necessarily transparent or semi-transparent. It is not necessary to perform 3D display in an opaque display mode.
[0040]
【The invention's effect】
As explained above According to the vehicle-mounted navigation device according to the present invention, When driving More than a predetermined number of floors that are marked ahead of the vehicle position By displaying each property name in a display form that gives a unified feeling to the leader line attached to the property name display area that indicates each property on the display screen, Can easily recognize the correspondence between the property name and the property name, and contribute to smooth vehicle travel.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of an in-vehicle navigation device according to an embodiment of the present invention.
2 is a plan view showing an external configuration of an operation unit (remote control transmitter) in FIG. 1. FIG.
3 is a diagram showing a data structure of property drawing data (polygon data) included in map data stored in the CD-ROM in FIG. 1;
FIG. 4 is a diagram illustrating a screen display example related to 3D map display;
FIG. 5 is a supplementary explanatory diagram of the screen display example of FIG. 4;
6 is a flowchart showing an example of a property name display process related to a three-dimensional map display performed by the in-vehicle navigation device of FIG. 1. FIG.
[Explanation of symbols]
1 ... CD-ROM (data storage means)
2. Operation unit (information input means)
5 ... GPS receiver
6 ... Self-contained navigation sensor
7. Display device (display means)
17. Control unit (display control means)
18 ... Map drawing part
19 ... Operation screen / mark generator
20 ... Guidance route storage unit
21 ... Guide route drawing unit
23. Image composition unit (display control means)
30 ... Remote control transmitter
31 ... Joystick
32 ... “OK” button
40 ... Display screen
41 ... Map image
42a-42e ... Properties displayed in 3D
43a-43e… Display range of property name (Property name display area)
44a to 44e ... Lead lines attached to the property name display area
CM: Vehicle position mark

Claims (5)

Information input means for inputting information related to the map display specified by the user;
Display means for providing guidance information to the user via a screen;
A data storage means for storing map data including property drawing data including property name, coordinate data, and attribute data for each building, facility, and other various properties;
Comprising display control means operatively connected to the information input means, display means and data storage means,
The display control means, the data on the basis of the properties the drawing data stored in the storage means when the three-dimensional map display is designated through the information input means, on the screen of the display unit, from the vehicle position In addition, the property with a predetermined number of floors or more is displayed three-dimensionally on the front side, the property name is displayed on the upper left side or the upper right side of the property, and a lead line attached to the display range of the property name is wherein the top surface center position vehicle navigation apparatus, characterized in that to display in a particular display mode so as to draw from the top center position of the property along a straight line connecting the center of the vehicle position.   The display control means attaches the property name corresponding to the three-dimensionally displayed property and the display range of the property name in synchronization with the display content on the screen being updated as the vehicle travels. The in-vehicle navigation device according to claim 1, wherein the lead line is displayed in the specific display mode.   2. The in-vehicle navigation device according to claim 1, wherein the display control unit displays a three-dimensional display of the property having the predetermined number of floors or more on the screen of the display unit in a transparent or semi-transparent display mode.   The display control means includes means for dividing the map image displayed on the screen of the display means into a plurality of display sections and determining whether or not the display ranges of the property names overlap for each display section. When the display range of each property name overlaps in the display category, the display of the property name and the leader line attached to the display range of the property name is displayed in the specific display mode only for one property according to a predetermined priority order. The in-vehicle navigation device according to claim 1, wherein the in-vehicle navigation device is performed.   5. The display control unit according to claim 1, wherein when a three-dimensional display of a property having a predetermined number of floors or more is displayed on the screen of the display unit, a property having a number less than the predetermined number of floors is planarly displayed. The in-vehicle navigation device according to one item.

Images