JP4590712B2 - MAP DISPLAY DEVICE, NAVIGATION DEVICE, MAP DATA GENERATION METHOD, STORAGE MEDIUM, AND PROGRAM TRANSMISSION DEVICE - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a map display device and the like typified by a navigation device, and more particularly to a map display device and the like that display a bird's-eye view with an astronomical situation added.
[0002]
[Prior art]
In a navigation device used for a vehicle, a display using a bird's-eye view is employed. In the display using the bird's-eye view, for example, the viewpoint is set at a point behind a predetermined distance from the current location of the vehicle and above a predetermined height. From this viewpoint, the direction in which the vehicle exists is looked down along the line of sight of a predetermined look-down angle, and the road map display area of the plan view developed on the XY plane is perspective-converted to a display screen set perpendicular to the line of sight Is displayed.
[0003]
When the display using this bird's-eye view is performed, a horizontal line is displayed, and a three-dimensional display for each element or space located on the map is possible. For example, a landscape represented by a mountain can be expressed with respect to the horizontal line portion. It is also possible to express sunsets according to the time, or to express constellations that are appropriately scattered according to the time. By adding such expressions, it is possible to provide a realistic bird's-eye view according to the actual location and the time at which it exists.
[0004]
[Problems to be solved by the invention]
As described above, when performing display using a bird's-eye view, there is a technique for applying a specific image to a space appearing on the display and providing a more realistic display image to the user. However, for example, even when displaying a constellation, the prior art is merely capable of expressing the night, and even if the prior art is applied, the content can be displayed at any point and in any direction. there were. As a result, even if you try to provide a realistic bird's-eye view, it may be displayed far from the actual celestial situation, and although it is possible to grasp the atmosphere, it is difficult to accurately use the displayed celestial situation. It was.
[0005]
The present invention has been made to solve such a technical problem, and an object of the present invention is to display a celestial situation based on an actual celestial position on a map display device represented by a navigation device. There is to do.
[0006]
[Means for Solving the Problems]
Under such a purpose, the present invention, for example, in a map display device represented by a navigation device such as a car navigation system, for example, when an empty part is displayed together with map information, such as a bird's-eye view representation, It is characterized by displaying celestial bodies consisting of stars (constellations), the sun, the moon, planets of the solar system, etc. in the sky. That is, a map display device to which the present invention is applied includes a monitor that displays drawing data generated based on stored map information, a storage unit that stores data relating to astronomical information, and information relating to the date and time. Date / time information acquisition means to acquire, information on the position, and information on the astronomical information stored in the storage means based on the information on the acquired position and the information on the acquired date / time Celestial drawing data generating means for generating celestial drawing data to be displayed from the image, and drawing the celestial object on the monitor by adding the generated celestial drawing data to the portion of the generated drawing data corresponding to the sky It is said.
[0007]
Here, the information on the position and the information on the date / time acquired by the date / time information acquisition means are acquired based on a signal captured from a GPS satellite. Like a device, the GPS receiver (GPS sensor) can properly grasp the current position of the moving object and the current date / time information, for example, a bird's-eye view and view from the current position together with map information It is preferable in that a celestial body that can be drawn can be drawn.
[0008]
Further, the celestial body drawing data generating means obtains information relating to the position based on the map information designated by the user from the stored map information, and a map display device that does not include a GPS sensor or the like In, the celestial body can be displayed using information on the position obtained from the designated map information. Similarly, the date and time can be acquired by the user's designation, and can be configured to be acquired based on the clock of the device if it is an approximate current time.
[0009]
On the other hand, a navigation device to which the present invention is applied is obtained by a GPS sensor that acquires information on a position and information on a date and time, a memory that stores map data, and a memory that stores data on astronomical information, and a GPS sensor. The map data is read out from the memory based on the information on the generated position to generate the bird's eye view display data, and the astronomical object stored in the memory based on the information on the position acquired by the GPS sensor and the information on the date / time It is characterized by comprising a CPU that reads out data relating to information and generates celestial drawing data displayed on a bird's-eye view, and a monitor that displays the display data and celestial drawing data generated by the CPU in a bird's-eye view representation. This memory may be a portable memory such as a DVD-ROM in addition to a RAM for temporarily storing data. Moreover, it is not necessary to be a physically single memory, and it is possible to store the map data and the data relating to celestial information in physically separate memories.
[0010]
The map data generation method to which the present invention is applied acquires position information and information related to the date and time, creates map drawing data expressed in a bird's eye view based on the acquired position information, and acquires the acquired position information and It is characterized in that astronomical drawing data is created based on information on the date and time, and the created astronomical drawing data is added to the data portion corresponding to the sky based on the map drawing data. This bird's-eye view representation includes not only a map representation viewed from above by a predetermined amount from the object, but also a representation of some empty parts together with predetermined map information as captured from the height of the object. Further, the position information can be acquired by an input by the user, and information about the position can be acquired from specified predetermined map information. Furthermore, the information regarding the date and time can be acquired by a clock included in the apparatus in addition to the information acquired from the outside.
[0011]
Here, the celestial body drawing data is calculated by acquiring predetermined position data regarding the celestial body, and is created by selecting a celestial body that can be displayed in a portion corresponding to the sky of the map drawing data. For example, it is possible to display the map drawing data represented by the bird's eye view by adding the created astronomical drawing data, and provide user-friendly display contents.
[0012]
On the other hand, the present invention is a storage medium in which a computer program to be executed by a computer is stored so as to be readable by the computer, and the program generates map drawing data represented in a bird's eye view based on predetermined position information; A process for generating astronomical drawing data based on position information and information on the date and time, a process for generating drawing data to be displayed by adding the generated astronomical drawing data to the generated map drawing data, and Is stored in a format that can be input to a computer. This storage medium corresponds to, for example, a CD-ROM, and is configured to be readable by a CD-ROM drive provided in the computer. Of course, the type of medium is not questioned, and it is sufficient that the program is configured to be executable by the computer device. Examples of computer devices include navigation devices represented by car navigation, and various mobile devices such as PDAs and mobile phones.
[0013]
Furthermore, the program transmission apparatus to which the present invention is applied is based on processing for generating map drawing data represented in a bird's eye view based on predetermined position information on a computer, and information on the position information and the date / time. Storage means for storing a program for executing processing for generating astronomical drawing data and processing for generating drawing data to be displayed by adding the generated astronomical drawing data to the generated map drawing data, and the storage And transmitting means for reading the program from the means and transmitting the program. As this program transmission apparatus, for example, a program providing server connected to the Internet corresponds, and the program is transmitted to a computer such as a navigation apparatus that executes the program. A computer device that has downloaded a program from the program transmission device can realize the functions of the program.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 is a block diagram for explaining a navigation device according to the present embodiment. The navigation device in the present embodiment mainly stores a vehicle speed sensor 11 and an angle sensor 12, a GPS (Global Positioning System) sensor 13, and various map data, astronomical information, and the like used for detecting the position and direction of the vehicle. The device 14 is composed of a microprocessor and its peripheral circuits, and includes a CPU 15 as a control / arithmetic circuit for controlling the entire navigation device, an input device 16 for receiving various instructions from the user by various switches, a liquid crystal display (LCD), and the like. A display monitor 17 configured to display various map information and bird's-eye view, a RAM 18 that temporarily stores various information, and a ROM 19 that stores an operation program of the CPU 15 and the like are provided.
[0015]
The GPS sensor 13 includes an antenna unit, a signal processing unit, and the like (not shown). For example, the position (orbit) information of GPS satellites captured from four GPS satellites, the propagation distance of signals from the GPS satellites to the GPS sensor 13, and the like. Based on the above, the latitude / longitude of the vehicle is calculated. In addition, the current date and time (time) can be acquired using the GPS sensor 13. However, the date and time information can also be obtained from other means such as a radio clock provided by the Ministry of International Trade and Industry. The vehicle speed sensor 11 and the angle sensor 12 collectively obtain a vehicle speed pulse, a back sensor, and the like as a gyro sensor, and can grasp the state of the vehicle. By grasping the vehicle state obtained from the vehicle speed sensor 11 and the angle sensor 12 with the position information acquired from the GPS sensor 13 as the center, for example, the vehicle travels in either direction and faces in which direction. It is possible to almost accurately grasp whether or not.
[0016]
The storage device 14 includes, for example, a DVD-ROM (Digital Versatile Disc Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), and a reading device thereof. Stores position data of solar system satellites and stars. Constellation can be stored corresponding to the equator or latitude ritual used when observing the absolute position of the sky. For example, it is sufficient to store about 20 to 30 constellation information well known by Japanese people as long as it is displayed on a bird's eye view navigation device. As celestial system information for the sun, moon, solar system satellites, etc., for example, celestial body position information for a predetermined time on a predetermined day at a predetermined position in Tokyo can be stored. As long as the celestial body information can be displayed on the bird's eye view of the navigation device, so much accuracy is not required. Therefore, in Japan, for example, about 1 celestial body position information is stored in the storage device 14, and the celestial body position information is stored. It is sufficient to calculate and display from. However, it is preferable to store astronomical position information at a plurality of points in order to improve the speed for calculation and increase the accuracy of display. Here, the equator ritual used for the position data of the constellation means that the optical axis is set parallel to the earth's earth axis (so-called polar axis alignment), and then within the field of view according to the red diameter and declination of the desired celestial body. Says something that captures the desired object. The gratitude ceremonies are those in which the orientation is set to the north (magnetic north) and a desired celestial body is captured in the field of view according to the orientation and elevation angle of the celestial body to be observed.
[0017]
The input device 16 is used by the user to input, for example, a destination, and to perform operations such as scrolling, rotating, changing the scale, and changing the viewpoint angle of the map. For example, an operation instruction may be issued wirelessly or wired using a remote control. For example, a touch panel may be provided on the display monitor 17 and input by operating the touch panel. The RAM 18 stores map data and position data read from the storage device 14. It is also used for storing bird's-eye view display data converted from map data when performing bird's-eye view display, and storing celestial body display data for displaying in the sky part of the bird's-eye view using position data. The storage of astronomical data in the RAM 18 is not limited to data based on the data read from the storage device 14, and for example, using a connected mobile phone (not shown), etc. It can also be configured to obtain from a remote server.
[0018]
FIG. 2 is a flowchart showing the flow of processing when displaying astronomical information during bird's-eye view display. This routine is started when the current location of the vehicle moves or when an operation related to the map is performed by the input device 16.
For example, when the current location moves, the CPU 15 first calculates the map orientation and viewpoint angle of the bird's eye view after the change (step 101). That is, the GPS sensor 13 measures the current value, the traveling direction of the vehicle, and the like, and these calculations are performed based on the viewpoint angle measured by the angle sensor 12. Next, map data around the current location such as the detected current location or a point moved by the input device 16 is read from the storage device 14 into the RAM 18 (step 102).
[0019]
Next, the read map data is converted into bird's eye view representation data (step 103). That is, as described above, for example, a viewpoint is set at a point behind a predetermined distance and above a predetermined height from the current position and traveling direction of the vehicle measured by the GPS sensor 13, and the presence of the vehicle is determined from this viewpoint. The viewing direction of the road map of the plan view developed on the XY plane is set to be perpendicular to the line of sight, looking down along the line of sight of a predetermined look-down angle calculated from the viewpoint angle measured by the angle sensor 12 and the like. The data is converted into bird's eye view data by performing perspective conversion on the display screen.
[0020]
Thereafter, a determination is made as to whether or not an empty drawing is necessary for the bird's eye view display (step 104). That is, based on the current viewpoint angle, a determination process is performed as to whether or not empty drawing is necessary in the map data of the bird's eye view representation. Here, if it is not necessary to depict the sky, the display is performed on the display monitor 17 as it is in step 109. When it is necessary to describe the sky, the storage data as celestial information is read from the storage device 14 into the RAM 18 (step 105). The CPU 15 calculates the trajectory based on the astronomical information read into the RAM 18, the latitude and longitude of the current location, the current date and time, and the current time ascertained by the GPS sensor 13 or the like (step 106). Thereafter, displayable objects are determined based on the bird's eye view display direction and viewpoint angle (step 107). That is, based on the calculated trajectory, an object that can be displayed in the sky is determined from the currently displayed map display orientation and viewpoint angle. Then, an additional drawing process is performed on the sky portion of the bird's eye view display data (step 108), that is, an additional drawing process of the celestial body is performed on the sky portion of the bird's eye view data converted in step 103. Thereafter, the bird's eye view data is displayed on the display monitor 17 (step 109).
[0021]
That is, as described above, for the position data of the star (constellation), for example, data expressed by the red diameter and declination in the equator ritual is stored in the storage device 14. For the planets of the Sun, Moon, and Solar System, the position of the red diameter and declination changes over time. For example, the date of January, 2000, etc. ) And the orbital element data are stored in the storage device 14. The CPU 15 reads out the position data read from the storage device 14 and stored in the RAM 18, the current position grasped by the GPS sensor 13, the vehicle speed sensor 11, the angle sensor 12, the current date / time, and the bird's-eye view. Based on the direction of the position corresponding to the sky in the middle, the red diameter / declination range corresponding to the display area of the display monitor 17 is calculated. Further, for those in which orbital element data is stored, the current red diameter and declination are estimated using the orbital element data based on the reference date and the elapsed time from the current date and time. A celestial body that can be displayed in the display area of the display monitor 17 is selected from the estimation result and star (constellation) position data, and drawing is performed using the corresponding schematic diagram expression data.
[0022]
3 and 4 are diagrams showing examples of display processing according to the present embodiment, and the contents displayed in the display area of the display monitor 17 are simply expressed. FIG. 3 is a diagram showing a display of a normal celestial body, and FIG. 4 is a diagram to which a schematic representation and display of character information are added. In FIG. 3, the display of the vehicle mark 31, the display of the map data 32 expressed in a bird's eye view, and the sun 34 and the moon 35 are displayed in an area corresponding to the sky 33.
[0023]
In FIG. 4, a planet 36 and a constellation 37 are schematically drawn in an area corresponding to the sky 33 in the bird's eye view. In this schematic expression, for example, if it is a planet of the sun, the moon, and the solar system, it can be expressed using the shape indicating the characteristics and the color indicating the characteristics. For example, if it is an expression of the sun, it is possible to express the expression of the morning sun or sunset by changing the color or size according to the time, and if it is the month, it will schematically represent the fullness of the moon. It is possible. Further, as shown in the figure, the star can be expressed by connecting the shape of the constellation 37 with a straight line. These schematic expressions are stored in the storage device 14 together with their position data. Further, as shown in FIG. 4, it is possible to simultaneously display character information 38 explaining what is drawn together with the display of the planets and stars of the sun, the moon, and the solar system. If the character information 38 is displayed at the same time, a learning effect on the user can be expected.
[0024]
In the display examples of FIGS. 3 and 4, a bird's-eye view representation is displayed with respect to the traveling direction of the car. For example, by the user switching operation from the input device 16, It is also possible to display astronomical information for the direction. In addition, the brightness and color of the area corresponding to the sky 33 can be changed according to the time to create an expression close to the situation used by the user and display celestial information.
[0025]
Thus, according to the present embodiment, the display as a navigation device can be diversified by adding specific astronomical information to the area of the sky 33 that appears in the bird's eye view representation of the navigation device. It is possible to provide a bird's eye view display that is gentler and kinder to the user. Further, by displaying astronomical information that matches the current position and date / time information, it is possible to provide the user with a navigation function that also uses such astronomical information.
[0026]
In the present embodiment, a navigation device mounted on a car has been described as an example. However, the present invention is not necessarily limited to that mounted on a car, and mobile devices such as mobile phones and PDAs (Personal Digital Assistants). The present invention can also be applied to a navigation device mounted on the vehicle. When mounted on a mobile phone or PDA, the mobile phone or PDA includes a GPS sensor 13, an angle sensor 12, an orientation sensor (not shown), and the like, and displays astronomical information along with a bird's eye view display on a display monitor 17 of these devices. What is necessary is just to comprise. If these functions are installed in a mobile phone or a PDA, the user can refer to astronomical information at the same time, for example, when trying to grasp the current position while walking. In addition, with such functions, it is possible to provide a fun navigation function for users who use mobile devices, together with the variety of expressions. It is also effective as a learning device for knowing astronomical information.
[0027]
In the present embodiment, the GPS sensor 13 is used to acquire the current position information and the current date / time information. However, for example, the present invention is realized by a mobile device that does not include the GPS sensor 13. Is also possible. For example, an approximate position is grasped by communication using a mobile phone or the like, and astronomical information to be displayed is generated by clock information that the user has. It is also possible to specify a position where the user wants to display instead of the current position, and generate and display astronomical information that appears at the specified position. If comprised in this way, it will become possible to display the celestial body which will be seen in the designated remote place which is not a present location.
[0028]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to display the celestial state close to the actual position of the celestial body on the map display device.
[Brief description of the drawings]
FIG. 1 is a block diagram for illustrating a navigation device in the present embodiment.
FIG. 2 is a flowchart showing the flow of processing when displaying astronomical information when displaying a bird's eye view.
FIG. 3 is a diagram showing an example of display processing according to the present embodiment.
FIG. 4 is a diagram showing an example of display processing according to the present embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 ... Vehicle speed sensor, 12 ... Angle sensor, 13 ... GPS sensor, 14 ... Memory | storage device, 15 ... CPU, 16 ... Input device, 17 ... Display monitor, 18 ... RAM, 19 ... ROM, 31 ... Own vehicle mark, 32 ... Map data, 33 ... Sky, 34 ... Sun, 35 ... Moon, 36 ... Planet, 37 ... Constellation, 38 ... Text information

Claims (7)

A monitor for displaying drawing data of a bird's eye view expression generated based on stored map information;
Storage means for storing data relating to astronomical information;
And date and time information acquisition means for acquiring information about the month date and time,
When the user specifies information about the position, the position information is obtained from the information about the position specified by the user. When the user does not specify the information about the position, the position is based on a signal captured from a GPS satellite. Information is acquired, and from the data related to astronomical information stored in the storage means, the position information acquired, the date / time information acquired by the date / time information acquisition means, and the display of the drawing data Celestial drawing data generation means for generating celestial drawing data according to the azimuth and viewpoint angle;
The drawing data generated based on the map information is added with the celestial drawing data generated by the celestial drawing data generation means and the character information describing the celestial drawing data , and the celestial object is attached to the monitor. A map display device characterized by drawing. A GPS sensor that acquires information about the position and information about the date and time;
A memory for storing map data and data related to astronomical information;
When the user specifies information about the position, based on the position information acquired by the information about the position specified by the user, when the user does not specify the information about the position, the position information acquired by the GPS sensor And reading the map data from the memory to generate the bird's-eye view display data, reading the data relating to the astronomical information stored in the memory, and displaying the position information, the date / time information, and the bird's-eye view display. A CPU that generates astronomical drawing data in accordance with the display direction and viewpoint angle of the data;
A monitor for displaying the display data generated by the CPU, the celestial drawing data , and character information describing the celestial drawing data in a bird's eye view representation;
A navigation device comprising: Obtain information about the date and time based on signals captured from GPS satellites,
When the user specifies information about the position, the position information is obtained from the information about the position specified by the user. When the user does not specify the information about the position, the position is based on a signal captured from a GPS satellite. Get information,
Create map drawing data that is expressed as a bird's eye view based on the acquired location information,
Create astronomical drawing data according to the acquired position information, information on the date and time, and the display orientation and viewpoint angle of the map drawing data,
A map data generation method comprising adding the created celestial drawing data and character information describing the celestial drawing data to a data portion corresponding to the sky based on the map drawing data.   The celestial drawing data is calculated by acquiring predetermined position data relating to the celestial body, and is created by selecting a celestial object that can be displayed in a portion corresponding to the sky of the map drawing data. 3. The map data generation method according to 3. A computer-readable storage medium storing a program to be executed by a computer,
The program is
Processing for obtaining information on the date and time based on signals captured from GPS satellites;
When the user specifies information about the position, the position information is obtained from the information about the position specified by the user. When the user does not specify the information about the position, the position is based on a signal captured from a GPS satellite. Processing to obtain information;
Processing for generating map drawing data represented in a bird's eye view based on the position information;
Processing for generating astronomical drawing data according to the position information, information on the date and time, and the display orientation and viewpoint angle of the map drawing data;
The celestial drawing data generated with respect to the generated map drawing data , and processing for generating drawing data to be displayed by adding character information describing the celestial drawing data can be input to the computer. A storage medium stored in a format. Astronomical drawing according to processing for generating map drawing data expressed in a bird's eye view based on predetermined position information on a computer, information on the position information, date and time, display direction and viewpoint angle of the map drawing data Processing for generating data , processing for generating drawing data to be displayed by adding the celestial drawing data generated for the generated map drawing data , and character information describing the celestial drawing data ; Storage means for storing a program for executing
Transmitting means for reading the program from the storage means and transmitting the program;
A program transmission apparatus comprising:   The position information is acquired based on information about the position specified by the user when the user specifies information about the position, and based on a signal captured from a GPS satellite when the user does not specify information about the position. 7. The program transmission apparatus according to claim 6, wherein the acquired information on the date and time is acquired based on a signal captured from a GPS satellite.

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