JPH06195022A - Device and method for analyzing topographical information - Google Patents

Abstract

(57) [Summary] [Purpose] The layout of analysis target points in the analysis target area is optimized to ensure sufficient topographic analysis accuracy while reducing the amount of calculation and providing effective topographic analysis information to users in real time. Obtain an information analysis device. [Structure] Based on information such as speed, altitude, current position, etc. of a helicopter or an automobile equipped with this device, the angular range F to K in the analysis target area is determined, and the grid point is moved to the distance d from the analysis point S or the progress. Depending on the angle from the direction A, it changes from dense to rough to optimize the placement of the analysis target points,
Secure sufficient terrain analysis accuracy for required directions and distance ranges, and reduce the number of grid points set as the distance increases, reducing the overall calculation amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terrain information analysis apparatus and a terrain information analysis method, and more particularly, to a detailed analysis chart for a necessary and sufficient area based on contour line information and attached information of a wide area. It relates to a means to quickly create and display.

[0002]

2. Description of the Related Art In a conventional topographical information analysis method, for example, a normalized mesh is created for an analysis target area, elevation values at all intersection points of the mesh, that is, all grid points are obtained from the contour line information, and stored in advance.
When the actual display is required, the topography is analyzed based on the altitude value of each stored grid point in order to obtain the cross-sectional view between the specified two points and display the three-dimensional shape of the specified area. It was

In order to improve the accuracy of this analysis method, it is necessary to subdivide the mesh and increase the grid points.
As the mesh is subdivided in this way, the amount of calculation increases, and the memory for storing the analysis result and the like also has a disadvantage of large capacity.

Further, the analysis accuracy is the same in the short distance area and the long distance area from the analysis target point, and there is a problem that extra calculation is executed for a long distance point which does not require such a detailed display.

On the other hand, Japanese Patent Laid-Open No. 61-148576 discloses a method of three-dimensionally displaying the shape of the ground surface based on high density pixel information such as high altitude photographed image data. Specifically, when forming a ground surface that is approximated by a triangle from high-density pixel information, if multiple pixel information are present in the approximated triangle, display target pixels are thinned out to achieve high-speed display. is doing. However, it is not a method of three-dimensionally displaying the shape of the ground surface based on vector information.

Further, Japanese Patent Laid-Open No. 61-267778 proposes a method of displaying a detailed map near the present location and a rough map other than that in a vehicle-mounted map display device.

Further, Japanese Patent Laid-Open No. 2-61690 discloses
In the on-vehicle map display device, a large scale near the current location,
We have proposed a method in which the distance is displayed at a small scale and the middle is connected at a medium scale.

Japanese Unexamined Patent Publication No. 1-106270 proposes a method of creating a perspective view in consideration of the influence of the terrain and displaying on the map whether or not the perspective is visible.

[0009]

In the above normalized mesh method, since the analysis accuracy in the analysis target area is uniform,
Highly accurate analysis requires a large amount of calculation, is time consuming, and has a drawback that the memory for storing analysis results and the like has a large capacity.

The method disclosed in Japanese Patent Laid-Open No. 61-148576 proposes a thinning method based on bitmap information, and cannot be easily applied to topographical analysis based on vector information.

According to the method disclosed in Japanese Patent Laid-Open No. 61-267778, a detailed map display range is set regardless of parameters such as the speed of a car or helicopter using the analyzed terrain information. , There was a problem that the unnecessary display area in the rear that has already passed is increased.

In the system disclosed in Japanese Patent Laid-Open No. 2-61690,
In some cases, the unnaturalness of the display of the connection zone connecting the middle with a middle scale is conspicuous, and rather, the conventional method in which several scales are switched has a better view in some cases.

In the method disclosed in Japanese Unexamined Patent Publication No. 1-106270, calculation is performed with the same accuracy as that of a see-through area even in a non-line-of-sight area, which is wasteful.

An object of the present invention is to optimize the number of grid points, avoid unnecessary calculation as much as possible, and reduce the calculation amount.
It is an object of the present invention to provide a topographical information analysis device and a topographical information analysis method that are provided with means for reducing the analysis time and reducing the memory capacity for storing the analysis result and the like.

[0015]

In order to achieve the above object, the present invention provides a means for detecting an attribute such as a traveling direction speed of an object such as an automobile using the analyzed topographical information, and detecting the object. Based on the physical attributes or the possible direction from the analysis point where the object exists according to the analysis purpose, the distance from the analysis point, various attributes of the analysis target area, etc., the vicinity of the analysis point becomes sparse as the distance from the analysis point increases. Proposal of a topographic information analysis device consisting of means for setting analysis target points, means for analyzing map information consisting of vector data at the set analysis target points, and means for displaying combined analysis results and topographic information To do.

The analysis target point setting means may be means for setting an analysis target point along an analysis target line segment such as a road.

The analysis target point setting means is means for excluding the analysis target points existing in the shadowed portion of the terrain among the analysis target points primarily set in consideration of the direction and distance from the analysis point. It is also possible to include means for displaying the excluded portion on the display means so as to be distinguishable from other portions.

In any case, when the object using the analyzed topographical information is a flying object such as a helicopter, the analysis target point setting means sets the flying object when the obstacle is analyzed in the flight course direction. It is desirable that the analysis target point is set to a long distance at a narrow angle in the case of high speed, and the analysis target point is set to a short angle in a wide angle at the time of low speed of the air vehicle.

On the other hand, when the object utilizing the analyzed topographical information is an antenna, the analysis target point setting means sets the analysis target point closer to the antenna installation point as the angle and distance increase in accordance with the directivity of the antenna. It is a means to roughly set.

In order to achieve the above object, the present invention also includes a step of detecting an attribute such as a traveling direction speed of an object such as an automobile using the analyzed topographical information, and a step of displaying the topographical area. At the stage of calculating the range to be analyzed in accordance with the attribute, and setting the grid points from dense to coarse according to the distance and / or speed from the point where the object exists in the analysis range, and determine the analysis target point. And a step of reading topographical information, a step of calculating and storing altitude value information etc. when the reading of the topographical information is completed,
It proposes a topographical information analysis method including a step of displaying the calculated data of the analysis target point.

When the terrain information data is managed by being divided into a plurality of areas, the step of reading the terrain information includes the step of determining whether or not each grid point is within the same area, and the terrain information data. Is included in a plurality of areas, there are two steps including a step of searching the plurality of areas and reading information.

[0022]

In the present invention, when a grid is formed from the current position of an automobile or the like that requires terrain analysis, that is, an analysis point, the purpose of analysis and / or the terrain information analysis device mounted and utilized, for example, an automobile or helicopter. Placement of analysis target points by changing the grid points, that is, the density of analysis target points according to the distance from the analysis points and the angle from the traveling direction, etc., according to the speed and altitude of the target area and the topographical attributes of the analysis target area. While the terrain can be optimized and sufficient terrain analysis accuracy can be secured for the necessary direction and distance range, the number of analysis target points is set to decrease as the distance increases, and thus the total calculation amount can be reduced. Therefore, within the necessary range, highly accurate altitude value information can be obtained in a short time, the number of analysis target points is optimized, the calculation amount is small, and comfortable real-time display is realized.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, with reference to FIGS. 1 to 20, an embodiment of a topographical information analyzing method and a topographical information analyzing apparatus according to the present invention will be described. FIG. 1 is a block diagram showing the configuration of an embodiment of the terrain information analysis apparatus according to the present invention. The terrain information analysis device includes a sensor information processing unit 101 that analyzes information such as the speed, altitude, and current position of a flying object such as a helicopter that is fetched from a sensor 108 (not shown), and a processing target (not shown here) for processing. Topographical information input means 102 for taking in topographical information from an external storage device or the like for accumulating topographical information
A storage means 103 for storing the topographical information of the processing target and the like fetched corresponding to the area designated by the input / output means 106; and the analysis result display means 1 based on the stored topographical information.
05 topographic information display means 104 for converting into information suitable for the display function, analysis result display means 105 for displaying analysis results, such as a CRT, and keyboard, mouse, trackball, etc. for inputting instructions of processing contents. The input / output unit 106 and the terrain analysis unit 107 that analyzes the terrain information of the processing target according to an instruction from the input / output unit 106. Since the input / output unit 106 may be realized in a form like a so-called touch panel on the screen of the analysis result display unit 105, it may have a display / output function as well as an input. 1
The division between 05 and the input / output means 106 is not so strict.

Of these, the terrain analysis means 107 is an analysis factor selection means 11 that fetches analysis information from the sensor information processing means 101 in order to determine the range and quantity of analysis target points.
1, an analysis area calculation means 112 for calculating an area to be analyzed in the displayed topographical area, a topographical information selection means 113 for selecting topographical information in the analysis target area of the displayed topographical information, It includes an analysis unit 114 for calculating the information to be analyzed, a result information editing unit 115 for editing the analysis result information, and the like.

The terrain analysis means 107 takes in necessary information from the terrain information input means 102 and develops it in the storage means 103. On the other hand, the analysis result display means 105 also has a function of displaying in real time the information selected by the terrain information selection means 113.

FIG. 2 is a block diagram showing an example of a system configuration for realizing the terrain information analyzing apparatus of the embodiment of FIG. 1 as a computer system. The terrain information analysis device includes a central processing unit (CPU) 100 and a main memory 200.
A disk device 103 and a display device 105 such as a CRT
, Keyboard 106, mouse 106, and sensor 10
8 and.

The main memory 200 is a central processing unit (CPU)
The operation program of 100 is stored, and the topographical information of the processing target is also stored. The central processing unit 100 executes a program stored in the main memory 200 to realize various functions of the terrain information processing apparatus. The disk device 103 is an external storage device that hierarchically stores various topographical information such as contour lines and roads, and also stores a large amount of information configured at a plurality of scales. The sensor 108 is a means for obtaining motion information such as altitude, traveling direction, speed, position, etc., which is attached to a helicopter, a vehicle, or the like, which is equipped with the terrain information analysis device or uses the information through a communication line.

FIG. 3 and FIG. 4 are views for explaining an example of a topographical information management system. In this embodiment, the entire topographical information is divided into a plurality of substantially equal sections for management. The hatched area of the section shown on the map in the upper part of FIG. 3 is further divided and stored into, for example, nine areas having substantially the same area as in the lower part of FIG.

As shown in FIG. 4, the topographical information Ni of each area is managed as a pair with the index information I for searching it. The topographical information Ni includes topographical information N1 to Nn at a plurality of scales (for example, 1/20000, 1/50000, ...) For the same area, and the corresponding index information I1 to In.
have. The terrain information Ni of a certain scale is managed by being divided into area units defined for each scale, that is, areas 1 to k. The index information Ii is XY of the position information at the lower left corner.
The coordinates, the relative distance from the X coordinate, the relative distance from the Y coordinate, and a pointer indicating the storage address of the area of the topographical information corresponding to the area. The XY coordinates of the position information are represented by absolute coordinates, and are continuous with topographical information of different areas. With this management method, index information is searched for the designated scale and area, the terrain information of the corresponding area is read out, expanded in the main memory 200, and sent to the terrain information display means 104, and the display device 105 such as a CRT is displayed. Is displayed in.

FIG. 5 is a diagram for explaining an example of the hierarchical structure of the terrain information in area units and the structure of the contour line information which is a part thereof. The topographical information of the area R includes header information and a plurality of types of information (topographical map element:
Water system information, road information, contour line information, etc.). The header information includes the lower left corner coordinates (XL, YL) indicating the topographic information area of that area, the upper right corner coordinates (XU, YU), and type information 1
And a type information index indicating a storage address of k. The content of each type of information is, for example, in the case of contour line information,
The number of contour lines and line information 1 to m. Each line information includes the number of constituent points P, attached information D (elevation value in the case of contour lines), and each constituent point.

FIG. 6 is a flow chart showing an example of the basic procedure of the analysis processing of the present invention. In this example, when a flying object such as a helicopter flies at a low altitude on the ground, an obstacle is analyzed in order to display collision prevention guidance on the aircraft.

The terrain analysis means 107 starts the terrain analysis routine shown in FIG. 6 based on, for example, an obstacle display command from the keyboard 106, and executes the following processing. Step 601: A region to be analyzed, that is, a range is calculated from the displayed terrain region. Step 602: Determine an analysis target point as a grid point in the analysis target range. Step 603: When the topographical information data is managed by being divided into a plurality of areas, it is determined whether or not each grid point is within the same area. Step 604: If it is included in a plurality of areas, the inside of the plurality of areas is searched to read information. Step 605: When the analysis target point is in the same area, or when the information read from the plurality of areas is completed even if the analysis target point is in the plurality of areas, for example, the altitude value information is calculated and the present apparatus is operated. If the purpose of use is to prevent collision of flying objects, select the highest altitude in each area,
Remember. Step 606: It is judged whether or not the information calculation of the entire range is completed, and if it is not completed, the procedure returns to step 605,
If it is completed, the process proceeds to the display data conversion process. Step 607: Convert the calculated data of the analysis target point into displayable data. Step 608: Display on a display device such as a CRT.

FIG. 7 is a diagram for explaining an example of a main menu screen for inputting analysis points. In this example, the sensor information processing unit 101 uses the sensor 10 for the terrain information at an arbitrary scale, for example, 1/50000 displayed on the main menu of the display device 105 via the terrain information display unit 104.
Information such as the advancing direction, speed, and altitude of the helicopter is taken in from 8, and the advancing direction and speed are displayed in the form of a vector on the same screen.

FIG. 8 is a diagram for explaining an example of factors that limit the analysis target range when calculating the analysis target range in the displayed topographical region in step 601.
Here, speed information obtained from the sensor 108 at the analysis point (in this case, the current position of the helicopter) S, the effective distance D from the analysis point, and the effective turning angle θ in order to determine the range to be analyzed is used as key information. Set.

FIG. 9 is a diagram for explaining an example of a management system of information on the effective turning angle of the helicopter. As the speed information, a value that is divided into levels at a fixed rate is used.
The turnable angle is determined accordingly. For example, when hovering, that is, floating in the air and stopped, 36
It is possible to make a 0 ° turn, but as the speed increases, the turning angle becomes limited. On the contrary, when the speed is low, the effective distance of the range to be analyzed may be short, but as the speed becomes higher, the analysis must be performed farther.

FIG. 10 is a diagram for explaining an example in which the analysis target range changes according to the speed level. 10A shows the case where the speed level is 2, and FIG. 10B shows the case where the speed level is 8. d1 and d2 are effective distances.
It should be noted that if (A) of FIG. 10 is made to have the same scale as (B), it becomes too small and it is difficult to draw. Therefore, it is relatively enlarged here.

FIG. 11 is a diagram for explaining an example of a procedure for obtaining the coordinates of the analysis target point. In step 602 of FIG. 6, line segments SB, SC, SD, SE, SF, SG, SH, centering on a line segment SA indicating the traveling direction from the analysis point S are used.
Create SI, SJ, SK. At this time, line segments SA and SB
The angle is made smaller, and the angle is made larger toward the SF side. The line segments SB and SG are targeted around the line segment SA. The other line segments are similarly determined. Next, the distances R1 to R6 from the point S are determined so that the area near the point S is short and the area far from the point is long. With this method, a fan shape having a center S, radii R1 to R6, and line segments SA to SK can be formed. Coordinates are obtained using the intersections, or grid points, formed within this sector as the analysis target points.

FIG. 12 is a diagram for explaining another example of the procedure for obtaining the coordinates of the analysis target point. Here, the analysis point S
A coordinate system in which a point is the central coordinate (X0, Y0) is used. (1) Analysis target points P1, P7, P13, P19, P25
Each coordinate of is calculated as follows. (2) When the general angle θ represented by the radius vector SX is in the first quadrant, the coordinates are obtained as follows. Coordinates of point Pn1 = (X0 + Rncos θn, Y0 + Rnsin θn) Rn = distance from analysis target point R1 to R5 θn = angle formed by radius SX and X coordinate (3) When general angle θ represented by radius SX is in the second quadrant Is calculated as follows. Coordinates of point Pn2 = (X0-Rncos (180 ° -θn), Y0 +
Rnsin (180 ° −θn)) (4) When the general angle θ represented by the radius vector SX is in the third quadrant, the coordinates are obtained as follows. Coordinate of point Pn3 = (X0−Rncos (θn−180 °), Y0−
Rnsin (θn−180 °)) (5) When the general angle θ represented by the radius vector SX is in the fourth quadrant, the coordinates are obtained as follows. Coordinate of point Pn4 = (X0 + Rncos (360 ° −θn), Y0−
Rnsin (360 ° −θn)) Even in this way, in step 602, the coordinates of the analysis target point around the analysis point are obtained in all directions.

Next, in step 603, it is first determined whether or not the coordinates of the four corners obtained in step 602 are present in area 5 shown in FIG. 7, for example.

If it exists in area 5, step 6
In 05, the information of the contour lines contained in the area 5 is read onto the main memory 200. The information of contour lines is searched in units of the calculated blocks at the analysis target points at the four corners, and the elevation value of the block is obtained.

FIG. 13 is a diagram for explaining contour line information of the analysis target area. FIG. 14 is a diagram illustrating an example of a procedure of enlarging the shaded portion of FIG. 13 and obtaining the intersection of the contour line information and the block in one block in the analysis target area.

As shown in FIG. 14, the contour line information of the altitude value of 200 m in the block 3 includes the constituent points (Xa1, Ya1) to (Xa3, Ya3) and (Xd1, Yd) representing the position information of the contour line.
1) and (Xd2, Yd2). Based on the coordinates of the constituent points and the coordinates of the four corners, the presence / absence of intersections existing in the block 3 is determined. When only one contour line information exists, the altitude value of the contour line information is stored in the memory as the altitude value in the block 3.

As shown in FIG. 14, when there are two or more contour line information, the highest altitude value is stored as the altitude value of the area.

On the other hand, if there is no contour line information as in block 20 in FIG. 13, the average value of the altitude values of the blocks above, below, left and right, for example, is stored in the memory as the altitude value of the corresponding area. In the case of the block 20 of FIG. 13, it is 160 m.

Step 605 for all fan-shaped blocks
Is executed, and in step 606, it is determined whether or not the calculation of the information of the entire range is completed. As a result, the coordinates of the upper left corner of each block, the elevation value, and the block number are stored as the information of the block.

FIG. 15 is an explanatory diagram in the case where the analysis target point extends over a plurality of areas, that is, when it is determined in step 603 that the analysis target point extends over the areas 5, 6, 8 and 9 in FIG. 7, for example. is there. In step 604, when the analysis target point M11 is included in the area 8, the contour line information included in the ranges M3, M6, M11, and M5 is read onto the memory. Similarly, in the case of area 9,
The contour line information in the ranges M3, M8, M9, M4 is read out, and in the case of the area 6, the ranges M3, M2, M10, M7.
The contour information inside is read out on the memory.

Thereafter, the processing of step 605 is executed for each area based on the read contour line information.

FIG. 16 is a diagram showing a display example of the result of the obstacle analysis processing. Based on the altitude value information obtained in step 606, in step 607, the display data is converted so as to display the obstacle in the traveling direction. In step 608, the image is displayed on the display device 105 such as a CRT.

In practice, for example, the analysis point indicating the current position and the analysis target area are displayed in an overlapping manner on the same screen displaying the topographical information. After that, the current altitude taken from the sensor 108 is compared with the altitude value obtained in step 606, and the portion of the block having an altitude value equal to or higher than the current altitude is filled with, for example, an emphasis color to call the attention of the pilot. Further, in the traveling direction, when there is a portion higher than the current altitude, an alarm can be sounded and an operator can be alerted.

FIG. 17 is a diagram showing a display example of the result of the obstacle analysis processing of the directional antenna. The direction and effective range of a directional antenna are determined by the performance of the antenna. Create a limited analysis target point within the effective range,
Parse and display.

FIG. 18 is a diagram showing a display example of the result of the analysis process along the line segment to be analyzed. When the line segment to be analyzed is road information, when a moving object such as a car moves along a defined route, the height difference of the road from the current position to the destination, which is captured from the sensor at the request of the operator, is displayed. . When the route is changed, the new route is stored according to the route change instruction from the operator and is displayed in the same manner.

FIG. 19 is a diagram showing a display example of the result of the analysis process targeting the human visual field and the process exclusion procedure of the invisible part. Considering human eyesight and visual field,
High accuracy information is required for short distances, but not so accurate information for long distances. In addition, the visual field is considered to be appropriate as information if it is in the range of 120 degrees to the left and right from the center. In the case of analysis, in particular, an analysis target point in a place that cannot be seen through is excluded from the processing target, and the overall processing speed is increased. In the example of FIG. 19, the shaded portion is the portion that is not the processing target.

FIG. 20 is a diagram for explaining the procedure for converting the display data of the analysis process in consideration of the human visual acuity and visual field. A procedure for converting the elevation value information obtained from the analysis result into display information will be described.

The distance between the two points A and B is calculated and set as H1. Similarly, H2 to H4 are obtained. The total of H1 to H4 is H14, and the effective visual field angle of 120 degrees of human and H14 are the same value in relative ratio. For the point B, the value on the horizontal axis to be displayed is obtained from the following proportional expression. When the value to be obtained is X, 120: H14 = X: H1, and X = (H1 × 120) / H14 Similarly, the following relationship is obtained for the point C. X = ((H1 + H2) × 120) / H14 In the same manner, the distance obtained from the coordinate value of each block is converted into display data.

As shown in FIG. 20, the horizontal axis in the middle is set to 0 degree, and the effective viewing angle is set for the left and right objects. Elevation value on the vertical axis
(Or altitude) and plot the converted value.
The elevation value of each point on the line segment SA is plotted on the line of 0 degree. After that, points at the same distance from the point S are connected by a line segment and displayed on the screen as shown in FIG.

[0056]

According to the present invention, the analysis target point in the analysis processing target range of the topographic information can be properly selected according to the processing purpose, so that sufficient topographic analysis accuracy can be ensured.
It is possible to reduce the amount of calculation and provide effective information to users in real time.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a terrain information analysis apparatus according to the present invention.

FIG. 2 is a block diagram showing an example of a system configuration for realizing the terrain information analyzing apparatus of the embodiment of FIG. 1 as a computer system.

FIG. 3 is a diagram showing an example of a basic configuration of topographical information.

FIG. 4 is a diagram illustrating an example of a management method of topographical information.

FIG. 5 is a diagram illustrating an example of a hierarchical structure of topographic information in area units and a structure of contour line information which is a part thereof.

FIG. 6 is a flowchart showing an example of a basic procedure of analysis processing of the present invention.

FIG. 7 is a diagram illustrating an example of a main menu screen for inputting analysis points.

FIG. 8 is a diagram illustrating an example of an analysis target range limiting factor.

FIG. 9 is a diagram illustrating an example of a management system of information on an effective turning angle of a helicopter.

FIG. 10 is a diagram illustrating an example in which the analysis target range changes according to the speed level.

FIG. 11 is a diagram illustrating an example of a procedure for obtaining coordinates of an analysis target point.

FIG. 12 is a diagram illustrating another example of a procedure for obtaining the coordinates of the analysis target point.

FIG. 13 is a diagram illustrating contour line information of an analysis target area.

FIG. 14 is a diagram illustrating an example of a procedure for obtaining an intersection between contour line information and a block in one block in an analysis target area.

FIG. 15 is an explanatory diagram of a case where a block in an analysis target area extends over a plurality of areas.

FIG. 16 is a diagram showing a display example of a result of obstacle analysis processing.

FIG. 17 is a diagram showing a display example of a result of obstacle analysis processing of a directional antenna.

FIG. 18 is a diagram showing a display example of a result of analysis processing along a line segment to be analyzed.

FIG. 19 is a diagram showing a display example of a result of an analysis process targeting a human visual field and a process exclusion procedure of a part that cannot be seen through;

FIG. 20 is a diagram illustrating a procedure for converting display data of analysis processing targeting a human visual field.

[Explanation of symbols]

 100 central processing unit (CPU) 101 sensor information processing means 102 terrain information input means 103 external memory (disk device) 104 terrain information display means 105 analysis result display means (display device) 106 input / output means (keyboard, mouse, etc.) 107 terrain Analysis means 108 Sensor 111 Analysis factor selection means 112 Analysis area calculation means 113 Topographic information selection means 114 Analysis means 115 Result information editing means 200 Main memory 601 Analysis range determination processing 602 Analysis target point determination processing 603 Analysis target point area determination processing 604 Multiple Area search and information read processing 605 Elevation value information calculation and storage 606 Full range information calculation completion determination 607 Display data conversion processing 608 Display processing

Claims (7)

[Claims] 1. A means for detecting an attribute such as a traveling direction speed of an object such as an automobile using the analyzed topographical information, and an analysis in which the object exists in accordance with the detected physical attribute of the object or the analysis purpose. Based on the possible traveling direction from the point, the distance from the analysis point, various attributes of the analysis target area, etc., a means for sparsely setting the analysis target point as the distance from the analysis point increases as the distance from the analysis point increases. A terrain information analysis device comprising means for analyzing map information consisting of vector data at the analysis target point and means for displaying combined analysis results and terrain information. 2. The terrain information analysis apparatus according to claim 1, wherein the analysis target point setting means is means for setting the analysis target point along an analysis target line segment such as a road. Information analysis device. 3. The terrain information analysis apparatus according to claim 1, wherein the analysis target point setting means sets the forward terrain of the analysis target points that are primarily set in consideration of the direction and distance from the analysis point. A topographic information analyzing apparatus comprising: means for excluding an analysis target point existing in a shadowed portion; and means for displaying the excluded portion on the display means so as to be distinguishable from other portions. 4. The terrain information analyzing apparatus according to claim 1, wherein the object utilizing the analyzed terrain information is a flying body, and the analysis target point setting means is a flight course. When analyzing obstacles in the direction, set the analysis target point at a narrow angle to a long distance when the flying object is high speed, and set the analysis target point only at a short angle at a wide angle when the flying object is low speed. A topographical information analysis device characterized by being means for setting. 5. The terrain information analysis apparatus according to claim 1, wherein the object using the analyzed terrain information is an antenna, and the analysis target point setting means matches the analysis target point with the directivity of the antenna. A topographical information analysis device, which is means for setting densely to coarsely as the angle and distance from the antenna installation point increase. 6. A step of detecting an attribute such as a traveling speed of an object such as an automobile using the analyzed terrain information, and a range to be analyzed in the displayed terrain area according to the attribute. A step of calculating, a step of deciding an analysis target point by coarsely or coarsely setting grid points according to a distance from a point where the object exists and / or the speed in the analysis target range; A topographical information analysis method comprising a step of reading, a step of calculating and storing elevation value information and the like when the reading of the topographical information is completed, and a step of displaying the calculated analysis target point data. 7. The topographical information analysis method according to claim 6, wherein when the topographical information is read, the grid points are in the same area when the topographical information data is managed in a plurality of areas. Topography characterized by comprising the steps of determining whether or not it is inside, and, if the data of the topographical information is included in a plurality of areas, searching the plurality of areas and reading out the information. Information analysis method.