JP3347717B2 - Landscape display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scene display device in an on-vehicle navigation device, a sightseeing spot guidance system, a wireless service assisting device and the like.

[0002]

2. Description of the Related Art In recent years, a navigation device for displaying a current position on a map by combining an electronic map and a device for estimating the current position of a moving object has begun to spread. The map displayed here is a schematic representation of a landscape like an aerial photograph viewed from the sky above your location, and you can see at a glance the positional relationship between your location and your destination. Because it is a plan view, it is difficult to see the view from any point.

[0003] Scenery information combined with a sundial is often seen at a vantage point in a tourist spot. The description of the east, west, north and south scenery is written from that point, so you can see the shape of the mountains, the name of the mountain, the height, the name of the plain / basin, the name of the sea / lake etc. by comparing with the actual scenery It has become.

When selecting a place where a wireless relay station or a wireless station itself for an unspecified number of people is to be installed, not only conditions such as ease of installation and securing of land are required, but also radio waves should reach as many houses as possible. Choose a place with a good view. Conventionally, a service range is estimated and selected while looking at a map including contour lines.

When observing astronomical objects, a constellation quick-view board is often used. This simply displays the state of the starry sky from the position, time, and the like. The structure is such that several circular cardboards can be stacked and rotated at one point at the center, and the scale of the position, date, time, etc. is set. The starry sky appears in a circular window.

[0006]

However, the above-described conventional techniques have the following problems. First of all, it is only necessary to provide a fixed view guide like a view point at a tourist spot, but otherwise it is difficult to understand the contents of the view. In particular, in the case of a moving object, since fixed view guidance is meaningless, there is only a method of estimating the view by looking at a map. It is convenient to be able to see the scenery guide anywhere.

Second, in the case of a fixed scenery guide, it cannot be seen unless the user is actually at the installation location. It is convenient to be able to see the scenery in any direction in any place without having to go to that place.

Third, in the method of estimating the scenery by looking at a map, it is difficult to find a place with the best scenery. It is convenient to quantify the beauty of the scene in some way so that it can automatically find the best place.

Fourth, when the starry sky is viewed using the constellation chart, if there are many clouds and the stars are not very visible and the direction is not clear, the correspondence between the constellation chart and the actual starry sky is displayed. Can not get well. If the scenery on the ground is displayed at the same time as displaying the starry sky, it will be very easy to respond.

[0010] In view of the above problems, the present invention can display a starry sky in a scenery in an arbitrary direction at an arbitrary place, and can investigate in advance the scenery including the starry sky at the place before going to the site. In addition, the present invention provides a scene display device that allows the user to see scene guidance including a starry sky at any place in accordance with movement.

[0011]

According to the present invention, there is provided a scene display apparatus comprising: map data;
And a position direction input means for inputting direction information, date and time input means for inputting date, and the sky database having sky information, before Symbol position direction said viewed the position <br/> put et inputted from the input means the direction, the starry before Symbol day time, created from the sky database, overlapping and said a map created from the map data starry a structure in which a table Shimesuru sky information display means and said time As an input means
The date and time obtained from an internal or external clock are used . With this configuration, the name, grade, position, and the name of the constellation to which the star belongs can be displayed together with the map on the starry sky at an arbitrary date and time viewed from an arbitrary position.

Further, the landscape display device of the present invention is provided with an automatic position detection device including a GPS, so that the starry sky at the current position can be automatically displayed without inputting a position. When moving, the starry sky display can also be changed to follow it.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a scene display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram of a scene display device according to an embodiment of the present invention. The configuration and the operation will be described with reference to FIG. Here, the present scenery display device has many hardware components in common with the in-vehicle navigation device, and it is convenient to have a navigation function at the time of actual use, so that the navigation device has a navigation function.

In FIG. 1, reference numeral 1 denotes a keyboard. 2
Is a GPS (Global Positioning Sy) as an automatic position detecting device which is an example of a position input device.
and an absolute position on the earth is obtained using radio waves from GPS satellites. The navigation device 24 displays the map and the current position mark on the display 25 based on the current position information and the map information 3. When a person switches the state of the system or inputs information, the keyboard 1 is used. When a menu is selected on the screen, the cursor displayed on the display 25 by the cursor display function 32 is used. Further, the keyboard 1 is not limited to a keyboard, but may be any input device used for computer application equipment such as a mouse and voice recognition.

Next, the scene screen display will be described. The position obtained from the keyboard 1 or the GPS 2 is set as the first position, and the mountain shape display function 8 uses the altitude (contour line) information included in the map information 3 to create the mountain shape as viewed from the first position. The basic algorithm for the creation exists in the computer graphics world as a conventional technique, and will not be described in detail here. In addition, Yamana
The altitude display function 9 also reads the names of the mountains and hills and the altitudes of the mountains and hills from the map information 3 and displays them on the display 25. Similarly, the wide area display function 10 displays the names of cities, lakes, seas, wide green spaces, and the like, and displays the names thereof.
Displays the names of target buildings, such as tall buildings, towers, and famous temples and schools. In some cases, the building itself may be displayed. The absolute direction display function 15
A scale is placed at the bottom of the displayed scene so that the north, south, east and west can be seen. The relative azimuth display function 16 is similar to the absolute azimuth display function 15, except that the direction is displayed in the relative azimuth based on the moving azimuth obtained from the GPS2. Tick the scale in the form of the right and left times, or the direction of what time. The elevation azimuth display function 17 is a function for displaying the azimuth angle in the vertical direction in the same manner as the horizontal direction. FIG. 2 shows an example of displaying the scenery in this manner.

If the display 25 cannot display a 360-degree view in all directions, a part of the view is displayed.
For example, a range of ± 40 degrees ahead is displayed. At this time, when the keyboard 1 is operated, a panning display is performed. For example, if a clockwise operation is performed in the display of ± 40 degrees in the north direction, the center scrolls smoothly from north to north-northeast, northeast, east-northeast, and east while the display angle remains ± 40 degrees. This feature is not special,
After creating the 60-degree scenery data, simply change the display window. When the panning operation command is obtained from the gyro 5 instead of the keyboard 1, the panning function is more effectively exhibited. The gyro 5 normally detects a rotational angular velocity, and integrates its output to obtain a rotational angle. Assuming that this output is a panning operation command, that is, the center of the scenery display orientation, if the body direction is changed while holding the scenery display device in the view stand, the scenery display is panned in synchronization with the change. In other words, the same scenery as the scenery you actually see is displayed in any direction. Also,
The gyro 5 may be anything as long as it detects the azimuth, and may be a geomagnetic detector or the like.

Next, the starry sky display will be described. It is well known that if the position on the earth and the date and time are determined, what star is in which direction is determined uniquely. This function displays the state of the starry sky. With the above-described scene display function, a scene of the ground at any position and in any direction is created and displayed. Similarly, when the starry sky display is selected by the keyboard 1, the sky information display function 11 reads the class and position of each star at that date and time, which constellation belongs, the name of the constellation, etc. from the database 4, The information is displayed on the display 25 so as to overlap the scene. By doing so, even when the number of visible stars is small, it is easy to understand what the star is by responding to the scenery on the ground. Also, if the orbit information of the sun is also stored in the database 4, the sunrise
It can also calculate and display sunset times and places in the scenery.

The scene evaluation value calculation will be described. This is a function that is used when you want to find the most scenic place. Consider the following three cases. The first case is
In this case, it is determined which parking lot to take a break in while traveling on a winding drive course along a coastline near a cliff such as a rias coast. The area determination function 19 determines that the view is good when the sea can be seen from the keyboard 1 with a view angle as wide as possible, that is, the view evaluation area (unit is the square of the degree) in which the sea in the view can be directly viewed is used as the scene evaluation value. Set to. Next, the user inputs the location of a candidate break point. A map is displayed on the display 25, and the cursor displayed by the cursor display function 32 is sequentially aligned with each candidate location, and the cursor can be selected by pressing the confirmation key of the keyboard 1. Instead of points, you can also select roads on the map. In this case, the road is automatically set as a candidate site every 25 m. The scenes are created by sequentially setting the candidate sites thus recognized as the first position. Once created, the area having the attribute of the sea is extracted by the area determination function 19, and the viewing angle area is calculated. Here, the viewing angle area means that when the object occupies a viewing angle of 15 degrees in the horizontal direction and a viewing angle of 10 degrees in the vertical direction,
And 10 [150 degrees].
This viewing angle area is stored in the evaluation value display memory 6 as a scene evaluation value. After calculating the scenery evaluation values for all the candidate sites, search for points with high scenery evaluation values,
The evaluation value display function 13 displays the points on a map displayed by the navigation function 24 on the display 25 by plotting marks or the like. In this way, the most scenic location can be known on the map.

The second case is to find a scenic place in a mountainous area. The usage of the scenery display device is almost the same as the previous case, and the difference is the definition of the scenery evaluation value. In this case, in the viewing angle area where the ground surface can be seen, the average of the line-of-sight distance per unit viewing angle area is set as the scene evaluation value. That is, it is assumed that the farther the average line-of-sight distance of the scene except for the sky is, the better the scene is.

The third case is a case in which the installation location of a radio station operating in the very high frequency band or higher is determined. In the case of a relay station such as a television, in order to cover the service area as completely as possible, it is installed at a point where the service area can be widely viewed. Also, when deciding the mobile operation location of amateur radio stations, urban areas with a high population density are usually the same as broadcast relay stations, except for the purpose of long-distance communication using mountain diffraction of radio waves. Choose a place with a view. The method of using the scene display device in this case is also substantially the same as in the previous case, except for the definition of the scene evaluation value.
In other words, the scenery evaluation value in this case is the total population within a viewable range. The calculation method is the same as in the previous case, and the sum of the population per unit viewing angle area is obtained. In this case, if only a specific area is targeted, the content thereof is input to the area determination function 19 from the keyboard 1 so that the population other than the specific area is not added when calculating the total population. Can also.

Next, the function of displaying the relative orientation with respect to the second position will be described. This means that when the second position is input from the keyboard, the information is input to the second position display function 18,
The second position is indicated by a downward arrow or the like in the already displayed scenery display screen. If the second position is not within the line-of-sight range, an arrow is displayed in the air above that direction, so that the second position is displayed in a distinguishable manner.
In addition, the straight line distance between the first position and the second position is also displayed together with the arrow display.

Next, the cut surface display function will be described. An example is shown in FIG. When the cut plane display is selected by the keyboard 1, the cut plane display function 21 refers to the altitude information from the map information 3 and cuts the earth in a vertical plane including the first position and the second position. indicate. At the same time, the altitude scale display function 22 displays the altitude scale. The propagation trajectory display function 23 calculates and displays the propagation trajectory of the radio wave and the length of the trajectory. The propagation trajectory becomes a straight line if the first position and the second position can be seen, but becomes a polygonal line in the case of mountain diffraction.

Next, a beam antenna driving device will be described. When the above-mentioned second position is input from the keyboard 1 and the azimuth of the second position with respect to the first position (the elevation angle is also calculated at the same time) is calculated, the beam azimuth direction for detecting the direction of the beam antenna 28 is detected. The azimuth / elevation angle comparison function 26 compares the output of the elevation angle detection device 29 with the azimuth / elevation angle, sends the output to the antenna drive device 27, and drives the beam antenna 28 until the calculated azimuth / elevation angle is reached. Thus, the direction of the beam is automatically directed to the second position.

Next, a signal of the scan output 30, which will be described for measuring the beam antenna reception pattern, is sent to the antenna driving device 27. The beam antenna 28 scans according to the signal. Beam azimuth / elevation angle detector 29 at that time
And the output of the reception output measuring device 31 are stored in the reception level display memory 7. The reception output measuring device 31 measures the level at which the beam antenna 28 receives the radio wave of the partner station (transmission side) at the second position. If there is no influence such as reflection from a mountain, the pattern stored in the reception level display memory 7 becomes the directivity pattern of the beam antenna 28. Actually, because of the influence of mountains and buildings,
It is different.

When the scanning is completed, the contents of the reception level display memory 7 are read out by the reception level display function 14 and displayed on the display 25 simultaneously with the scenery. Figure 4 shows a display example
Shown in In FIG. 4, the reception level is displayed in three stages. What is also detected on the hillside of the mountain A is the effect of reflection.

[0026]

[0027]

[0028]

As described above, according to the present invention, the names of stars and constellations can be known while looking at the starry sky. In addition, since the ground scenery is also displayed, even if there are many clouds and few visible stars, it is easy to confirm the correspondence with the ground scenery and the position of the star.

In addition, since the starry sky at the current date and time is often viewed, it is not necessary for a human to input the date and time. In addition, the starry sky display can be made to follow the transition of time.

[Brief description of the drawings]

FIG. 1 is a block diagram of a scene display device according to an embodiment of the present invention;

FIG. 2 is a view showing an example of a scene display screen in the scene display device.

FIG. 3 is a diagram showing an example of a cut surface display screen in the scenery display device.

FIG. 4 is a diagram showing an example of a reception level display screen in the same scene display device.

[Explanation of symbols]

1 Keyboard 2 GPS (Global Positioning)
System) Receiver 3 Map information 4 Database 5 Gyro 6 Evaluation value display memory 7 Reception level display memory 8 Mountain shape display function 9 Mountain name / elevation display function 10 Wide area display function 11 Sky information display function 12 Target object display function 13 Evaluation value Display function 14 Reception level display function 15 Absolute azimuth display function 16 Relative azimuth display function 17 Elevation azimuth display function 18 Second position display function 19 Area judgment function 20 Evaluation value calculation function 21 Cut plane display function 22 Advanced scale display function 23 Propagation trajectory Display Function 24 Navigation Function 25 Display 26 Azimuth / Elevation Angle Comparison Function 27 Antenna Driver 28 Beam Antenna 29 Beam Azimuth / Elevation Angle Detector 30 Scan Output 31 Receive Level Measuring Device 32 Cursor Display Function

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (5)

(57) [Claims] And 1. A map data, a position direction input means for inputting position information and direction information <br/>, date and time input means for inputting date, and the sky database having sky information, before Symbol position direction input means the <br/> direction as viewed from the inputted position from the starry sky before Symbol day time, created from the sky database in cascading and the starry sky and map created from the map data A landscape display device comprising sky information display means. Wherein said Sky information display means, a direction viewed from the position inputted from the position direction <br/> input means, the name of each star in date input from the date input means, grade, location or the constellation names belonging reading from the sky database views display device according to claim 1, wherein the table Shimesuru. 3. The scene display device according to claim 1, wherein the date and time input means uses a date and time obtained from an internal or external clock. Wherein said position direction input means views the display device according to any one of claims 1 to 3, characterized in that it comprises an automatic position detection device including a GPS. 5. A navigation device comprising the scene display device according to claim 1.