JPH07198408A - Map display apparatus for aircraft - Google Patents

Abstract

PURPOSE:To improve safety against terrain obstacles present on a flying route by correcting the altitude information and the position information of own aircraft in flying, enhancing the position measuring accuracy, and determining the safe altitude of the flying route interactively. CONSTITUTION:The measured value of a GPS receiver 1 is not used as the altitude information of own aircraft, but a barometric altimeter undergoes QNH correction with an altitude information correcting means (a), and the altitude value corrected for external temperature is used. The highly accurate altitude information is sent into a danger-alarm-range operator 2 and a display controller 6. As the position of own aircraft, the value of an own-aircraft-position correcting means (b), which is obtained by multiplying the ground speed and the turning rate of the GPS 1 by the operating time, is used. The corrected position of own aircraft is sent into the operator 2 and the controller 6, and the position of the aircraft when the position measurement is finished is displayed 7. When the ground speed reaches the specified value or more, the altitude alarm is automatically operated with a GS switch (c). Furthermore, a flying-route/safe-altitude confirming means (d) is provided, and the flying route is registered, and the safe altitude is inquired. Thus, the safety is checked interactively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map display device for an aircraft, which displays the position and topographic map of its own aircraft during navigation.

[0002]

2. Description of the Related Art Conventionally, as a map display device for predicting an obstacle approaching in front of a navigational device and facilitating avoidance operation, the current position, altitude and navigation speed of the navigation device are measured. A GPS receiver, an altitude / map memory that stores the position and height of obstacles such as mountains and steel towers, and the current position and altitude measured by the GPS receiver as a reference, and the navigation direction and speed are calculation elements. As a part, the danger warning range calculator that calculates the danger warning range and the memory data of the altitude / map memory within the danger caution range of the calculator output are searched, and an alarm signal is generated when an obstacle exists. There is a memory searcher that operates and a warning device that is activated upon receiving a warning signal. In this map display device, the GPS
The display signal is generated by receiving each output of the receiver, altitude / map memory and danger / warning range calculator, and the current position and altitude information measured by the GPS receiver and obstacles stored in the altitude / map memory. There is a feature that it has a display for displaying the position and height information of at least on the same screen (Japanese Patent Laid-Open No. 64-36400 as a prior art document).

By the way, in the above map display device,
The position information obtained by the GPS receiver is three-dimensional (vertical, horizontal, and height), but the height (altitude) error is larger than the vertical (latitude) and horizontal (longitude) errors. As shown in Table 1 below, the vertical position error of the GPS receiver is about 20 times better than the current navigation instrument, but the barometric altimeter is several times better in accuracy at higher altitudes.

[0004]

[Table 1]

In the above map display device, the GP
The position information received by the S receiver is processed by the map generator (computer), the map information corresponding to the position is called, the map is created, the positioning data of the GPS receiver are overlapped, and the map is displayed on the cockpit display. Display your position. The calculation time required for this cannot be ignored in comparison with the speed of the aircraft and the positioning accuracy of the GPS receiver. For example, if the calculation takes 0.5 seconds, the aircraft will be 120 kt
If you are flying in, the true position of the aircraft is always 30.88 m ahead of the cockpit display position.

Further, in the above map display device, in the altitude warning zone, the altitude data of the map in the computer memory is compared with the altitude data of the barometric altimeter equipped on the aircraft, and the ground above the position of the aircraft is displayed on the display. Warning red is displayed. However, if the power of the GPS-MAP device is turned ON before takeoff, the entire map becomes red because the aircraft is on the ground, which is not desirable as a display.

Further, since the map display device does not have a function of inquiring about the safety altitude of the flight route, the pilot usually decides the flight route, and in order to decide at which altitude to fly the safe route, the normal aerial map is used. Has been decided.
Therefore, it takes time to determine the flight route.

[0008]

Therefore, the present invention can improve the accuracy of the altitude information of the own aircraft during flight in the map display device for an aircraft, and can improve the positioning accuracy of the own aircraft position. Furthermore, even if the device power is turned on before the aircraft takes off, the altitude alarm will not be issued unless the aircraft speed reaches a certain speed, and in addition, it is possible to inquire about the safety altitude of the flight route. Is to provide.

[0009]

One of the aircraft map display devices of the present invention for solving the above-mentioned problems is a GPS receiver for measuring the current position, altitude and ground speed of the aircraft itself, a mountain or a tower. Based on the altitude and map memory that stores the position and height of obstacles such as, and the current position and altitude measured by the GPS receiver, the navigation direction and speed are calculated as part of the calculation of the danger warning range. A danger warning range calculator, a memory searcher for searching the memory data of the altitude / map memory within the danger caution range of the calculator output, and generating a warning signal when an obstacle exists, An alarm device activated by receiving a signal, a signal for display is generated by receiving each output of the GPS receiver, altitude / map memory and danger warning calculator, and the current position, altitude information and altitude measured by the GPS receiver・ Memory of map memory In a map display device for an aircraft, which comprises a display unit that displays at least the position and height information of obstacles on the same screen, the altitude information of the aircraft itself is displayed as a barometric altimeter without using a GPS receiver. QNH correction and a means for obtaining and correcting the outside air temperature obtained by an outside air thermometer,
Means for correcting the position of the own device by a value obtained by multiplying the ground speed and the turning rate measured by the GPS receiver by the calculation time, and
When the ground speed measured by the GPS receiver reaches a certain speed or more, a GS switch with a program that automatically activates an altitude alarm, and a waypoint and a desired flight altitude are input, the flight The ground that is higher than the flight altitude on the route is displayed in red on the screen, and when the flight altitude is raised and the red disappears, the flight route safety altitude inquiry means for obtaining the safety altitude of the flight route is provided. is there.

Another one of the map display devices for an aircraft of the present invention is equipped in the aircraft itself, a position measuring means for measuring the two-dimensional absolute current position of the aircraft itself, and an altitude measurement for measuring the altitude of the aircraft itself. Means, a map memory that stores three-dimensional information of two-dimensional position and height of obstacles such as terrain, display range calculation means for calculating a display range based on the current position measured by the position measuring means, A display for displaying the three-dimensional information of the display range read from the map memory, and an obstacle for retrieving the three-dimensional information stored in the map memory within the display range output from the display range calculation means. In a map display device for an aircraft equipped with a memory retrieval means for generating an alarm signal when an object exists and an alarm means for issuing an alarm based on the alarm signal, a barometer and an outside air temperature are measured. Temperature measuring hand When, a signal obtained by the barometer absolutely highly conversion, but further on the basis of the output signal of the temperature measuring means, characterized in that the absolute further and means for correcting the altitude.

Still another one of the aircraft map display devices of the present invention is equipped in the aircraft and has a position measuring means for measuring the two-dimensional absolute current position of the aircraft and an altitude for measuring the altitude of the aircraft. Measuring means, speed measuring means for measuring the speed of the own machine,
A map memory for storing two-dimensional information of the two-dimensional position and height of an obstacle such as terrain, a display range calculating means for calculating a display range based on the current position measured by the position measuring means, and the own machine. In a map display device for an aircraft comprising a position and a display for superimposing and displaying the three-dimensional information of the display range read from the map memory, a correction means for correcting the measured position of the own device. It is characterized by further comprising.

Still another one of the aircraft map display devices of the present invention is equipped in the aircraft and has a position measuring means for measuring the two-dimensional absolute current position of the aircraft and an altitude for measuring the altitude of the aircraft. Measuring means, map memory for storing three-dimensional information of two-dimensional position and height of obstacles such as terrain, and display range calculating means for calculating a display range based on the current position measured by the position measuring means , A display for displaying the three-dimensional information of the display range read from the map memory, and a search for the three-dimensional information stored in the map memory within the display range output from the display range calculation means. In a map display device for an aircraft equipped with a memory search means for generating an alarm signal when an obstacle exists and an alarm means for generating an alarm based on the alarm signal, the speed of the aircraft is measured. Speed measuring hand And a means for issuing an alarm to the alarm means based on the alarm signal after the speed of the aircraft obtained by the speed measuring means reaches a predetermined speed after the aircraft takes off. It is characterized by.

Still another one of the map display devices for an aircraft of the present invention is equipped in the aircraft and has a position measuring means for measuring the two-dimensional absolute current position of the aircraft and an altitude for measuring the altitude of the aircraft. Measuring means, speed measuring means for measuring the speed of the own machine,
A map memory for storing two-dimensional information of two-dimensional position and height of obstacles such as terrain, display range calculation means for calculating a display range, and three-dimensional information of the display range read from the map memory are displayed. In a map display device for an aircraft including a display device, a way point input means for inputting a way point, an altitude input means for inputting a desired flight altitude, and an output signal of the way point input means. And, in the three-dimensional information such as the terrain displayed on the display based on the output signal of the altitude input means, a part higher than the flight altitude is displayed in a different color so as to be distinguishable from other parts. Means are further provided.

[0014]

In the aircraft map display device of the present invention configured as described above, in order to obtain the altitude information of the aircraft itself, the barometric altimeter is subjected to QNH correction to make the altitude of the barometric altimeter absolute. Can be corrected. That is, the relation between atmospheric pressure and altitude is shown by Laplace's formula H = 18400 (log 1013.3-log B) H: height, B: atmospheric pressure (hp) at a high place. The altitude changes by 7.88 mm. This means that the altitude on the instrument changes depending on the weather, so if the altitude of the barometric altimeter is corrected to the absolute altitude, the accuracy will be improved. In addition, the altitude accuracy is improved by correcting the outside air temperature obtained by the outside air thermometer (bimetal or thermocouple) that is basically installed in the aircraft by 0.00367t × H (t: temperature, H: altitude). .

Further, in the aircraft map display device of the present invention, the positioning accuracy is corrected by correcting the position of the own device by the value obtained by multiplying the ground speed and the turning rate measured by the GPS receiver by the calculation time. Is improved. That is, the position of the own device can be accurately grasped by correcting the position of the own device by the amount of movement of the own device from the start of measurement by the GPS receiver to the completion of data reception.

Further, the aircraft map display device of the present invention is provided with a GS switch having a program for automatically activating an altitude alarm when the ground speed measured by the GPS receiver reaches a certain level or more. So before taking off G
Even if the power of the PS-MAP device is turned on, the altitude warning function remains stopped while the aircraft is on the ground, and the warning red display is not displayed. When you start flying and the ground speed obtained from the GPS receiver reaches a certain speed,
The function of the altitude warning automatically starts to operate, and thereafter, the function of the altitude alarm operates even if the ground speed reaches a certain speed during flight.

In the aircraft map display device of the present invention, when the way point and the desired flight altitude are input, the ground higher than the flight altitude on the flight route is displayed in red on the screen, and the flight altitude is displayed. When there is no red color, the flight route safety altitude inquiry means that obtains the safety altitude of the flight route is provided, so you can easily check whether the desired flight altitude is safe or not Can be decided.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the aircraft map display device of the present invention will be described. The basic configuration of the map display device is as shown in FIG. 1, 1 is a GPS receiver, 2 is a danger warning range calculator,
3 is an altitude / map memory, 4 is a memory searcher, 5 is an alarm, 6 is a display controller, and 7 is a display.

The GPS receiver 1 is a device for measuring the current position, altitude, ground speed (cruising speed) and bearing of the GPS receiver 1,
Based on the current position (latitude, longitude) and altitude obtained from this device, the danger warning range (three-dimensional The area) is obtained by the danger / warning range calculator 2, and data indicating this range is input to the memory searcher 4. The altitude / map memory 3 is composed of an IC memory,
Data on obstacles such as mountains and steel towers is stored as position (latitude, longitude) indicating its location and altitude corresponding thereto, and the stored contents are sent to the memory retrieval unit 4. The memory searcher 4 searches the hazard warning range sent from the danger alert range calculator 2 for the presence of obstacle data in the relevant altitude / map memory 3 to find out if the obstacle exists. When is detected, an activation signal is sent to the alarm device 5 to generate an alarm. The present position and altitude of the own device measured by the GPS receiver 1, the danger warning range obtained by the danger warning range calculator 2, and the obstacle data stored in the altitude / map memory 3 are further displayed on the display controller 6. Delivered, color CR there
Processing necessary for displaying on the display 7 such as T is added, converted into a color corresponding to the position and altitude on the screen, and displayed.

In the map display device having such a basic structure, according to the present invention, as shown in FIG.
Equipped with altitude information correction means (a), which does not use the GPS receiver 1 but performs QNH correction of the barometric altimeter and the outside air temperature obtained by the outside air thermometer. That is, as shown in FIG. 3, the altitude data is sent from the barometric altimeter 10 to the interface 11 and then sent from the interface 11 to the altitude data reader 12, where the altitude data read here is Q.
It is sent to the NH correction calculation unit 13. Also, from the barometric altimeter 10, QNH data, that is, the above-mentioned Laplace's formula H = 1840
0 (log 1013.3-log B), (H: height, B: atmospheric pressure at high place) is sent to the A / D converter 14, and the A / D converter 14 outputs the QNH data reader 15
Then, the QNH data read here is sent to the QNH correction calculation unit 13. Furthermore, the temperature data from the outside air thermometer (thermocouple) 16 that is basically equipped in the aircraft is A /
The temperature data is sent to the D converter 17, sent from the A / D converter 17 to the temperature data reader 18, and the temperature data read here is sent to the QNH correction calculator 13. QNH correction calculator 13
Then, the altitude data is corrected by the QNH data and the temperature data, and becomes highly accurate. This highly accurate altitude information is independently sent to the danger warning range calculator 2 and the display controller 6 shown in FIG.

Further, in the map display device having the above basic structure, in the present invention, as shown in FIG.
The ground position and turn rate measured by the S receiver are provided with own position correction means (b) obtained by correcting the value by multiplying the calculation time. This will be described with reference to FIG. 4. The GPS receiver 1
At the same time, the GPS receiver 1 sends the positioning data to the counter 20 and sends the positioning timing signal to the counter 20 to start the counter 20. The position data received by the data receiving unit 19 is the position correction calculation unit 21.
Then, the ground speed and course data received by the data receiving section 19 are sent to the correction value calculating section 22. When the data reception by the data receiving unit 19 is completed, the completion signal is sent to the counter 20.
The counter 20 is stopped, and the count value (delay time from the measurement data acquisition time to the position data reception completion) is sent from the counter 20 to the correction value calculation unit 22.
As a result, in the correction value calculation unit 22, the amount of movement of the vehicle from the start of positioning at the turn rate × t, the ground speed × t to the completion of data reception,
That is, the correction value is calculated. Then, this correction value is sent to the position correction calculation unit 21, the position data is corrected, and the corrected position data is sent to the danger warning range calculator 2 and the display controller 6 shown in FIG. This allows the display 7
The position of the own device at the time of ending the positioning is displayed on the screen of, not the position of the own device at the time of starting the positioning, and the position of the own device can be accurately grasped.

Further, in the map display device having the above basic structure, according to the present invention, as shown in FIG. 2, when the ground speed measured by the GPS receiver 1 reaches a certain level or more, the altitude alarm is automatically activated. A GS switch (C) having a program for That is, the power of the GPS-MAP device is turned off.
When set to N, a reset signal is sent from the signal generator 23 shown in FIG. 5 to the F / F 24 for resetting, the function of the advanced alarm of the alarm device 5 is stopped, and the warning red display is not displayed. The ground speed data of the aircraft itself which starts the flight and is measured by the GPS receiver 1 is sent to the speed comparison unit 25, where it is compared with the set speed entered from the speed setting unit 26, 5 kt in this example, and the ground speed data is obtained. When the speed exceeds the set speed of 5 kt, a set signal is sent to the F / F 24 and set, the altitude alarm function of the alarm device 5 starts operating, and the altitude data of the own device coming into the alarm device 5 and the ground The altitude data is compared, and if the altitude data of the aircraft is smaller than the altitude data on the ground, an alarm is issued, and even if the ground speed is zero, this alarm is also issued.

Further, in the map display device having the above basic structure, the present invention is provided with a flight route safety altitude confirmation means (d) for inquiring the safety altitude of the flight route as shown in FIG. This will be described with reference to FIG. 6. The altitude value setting unit 2
A desired flight altitude is set in 7, and way points are set in the display position setting section 28. The flight altitude set in the altitude value setting unit 27 is sent to the altitude comparison circuit 29, the way points set in the display position setting unit 28 are read out by the display area reading unit 30, and the map of the read display area is set up in altitude. It is expanded on the memory 31. The altitude value of the way point developed on the altitude memory 31 is sent to the altitude comparing circuit 29 and the second map display color control unit 32. The altitude value of the way point sent to the altitude comparison circuit 29 is compared with the flight altitude, and if the altitude of the flight point is lower than the altitude value of the way point, the first map display color control unit 33 performs a warning color display process. The red warning color of the corresponding area is displayed on the screen of the display 7 by the video generation circuit 34 through the second map display color control unit 32. Therefore, the flight altitude is raised and compared again with the altitude value of the way point, and if the flight altitude is higher than the altitude value of the way point, the first map display color control unit 33
The warning color display processing is not performed in the second map display color control unit 3
Normal display processing is performed on the basis of the elevation value of the way point sent to the video generating circuit 3
4 is displayed on the screen of the display device 7.

A concrete explanation will be given, for example, with reference to FIG.
As shown in the figure, from the departure point A to the arrival point C via the transit point B
If you set as the flight route,
If you plan to fly at an altitude of 00 m and input it, a red warning color will be displayed on the high ground of 400 m or more on the map displayed on the screen of the display unit 7 to inform you of the danger. Therefore, the scheduled flight altitude is increased until the red warning color disappears, and the altitude at which the red warning color disappears on the flight route becomes the flight safety altitude. In the case of this example, 600 m from the departure point A to the relay point B, and 30 from the relay point B to the arrival point C.
The computer will indicate the altitude of 0m as the flight safety altitude.

In this system, when the desired flight route is registered as shown in FIG. 7, it is possible to inquire about the flight safety altitude, and it is possible to easily check whether the desired flight route is safe or not. Can be easily determined.

In the above-mentioned embodiment, as shown in FIG. 2, the altitude information correction means (a), the own position correction means (b) and the GS switch (c) are added to the aircraft map display device having the basic structure shown in FIG. The flight route safety altitude confirmation means (d) is comprehensively provided, and the aircraft map display device of the present invention has the basic configuration of the aircraft map display device described above in (a),
(B), (c), and (d) are individually provided, and their variations are shown as means for solving the above-mentioned problems.

[0027]

As described above in detail, according to the aircraft map display device of the present invention of claim 1, the accuracy of the altitude information of the own aircraft during flight can be improved. It is possible to improve the positioning accuracy of the own position. Even if the device power is turned on before the aircraft takes off, the altitude warning function will not operate unless the aircraft speed exceeds a certain speed. You can inquire about the safety altitude of the flight route. In addition to the effects described above, the map display device for an aircraft according to the present invention according to claims 2 to 5 individually achieves the above effects. Therefore, it is possible to replace the conventional map display device. It can be said that.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of an aircraft map display device.

FIG. 2 is a diagram showing the configuration of an embodiment of an aircraft map display device of the present invention.

FIG. 3 is a view showing an altitude information correction unit of the aircraft map display device of the present invention.

FIG. 4 is a diagram showing own-vehicle position correcting means in the aircraft map display device of the present invention.

FIG. 5 is a diagram showing a configuration of a GS switch in the aircraft map display device of the present invention.

FIG. 6 is a diagram showing a flight route safety altitude inquiry means in the aircraft map display device of the present invention.

FIG. 7 is an explanatory diagram of a simple specific example of a flight route safety altitude inquiry by the flight route safety altitude inquiry means of FIG. 6;

[Explanation of symbols]

 1 GPS receiver 2 Hazard warning area calculator 3 Altitude / map memory 4 Memory search device 5 Alarm device 6 Display controller 7 Display device 10 Atmospheric pressure thermometer 11 Interface 12 Advanced data reader 13 QNH correction calculation unit 14 A / D conversion Device 15 QNH data reader 16 Outside air thermometer 17 A / D converter 18 Temperature data reader 19 Data receiving unit 20 Counter 21 Position correction calculation unit 22 Correction value calculation unit 23 Signal generation unit 24 F / F 25 Speed comparison unit 26 Speed setting unit 27 Elevation value setting unit 28 Display position setting unit 29 Elevation comparison circuit 30 Display area reading unit 31 Elevation memory 32 Second map display color control unit 33 First map display color control unit 34 Video generation circuit (a) Altitude information Correction means (b) Own position correction means (c) GS switch (d) Flight route safety high Confirmation means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshifumi Kojima 1 Kawasaki-cho, Kakamigahara-shi, Gifu Kawasaki Heavy Industries, Ltd. Gifu factory (72) Inventor Toyo Hashimoto 2-20 Nishimiyahama, Nishinomiya-shi, Hyogo

Claims (5)

[Claims] 1. A GPS receiver for measuring the current position, altitude and ground speed of the aircraft, an altitude / map memory for storing the position and height of obstacles such as mountains and steel towers, and the GPS receiver for measurement. Based on the current position and altitude, the danger warning range calculator that calculates the danger range by using the navigation direction and speed as a part of the calculation main part, and the altitude / map memory of the altitude / map memory within the danger caution range of the calculator output A memory searcher that searches memory data and generates an alarm signal when an obstacle is present, an alarm device that starts by receiving an alarm signal, the GPS receiver, altitude / map memory, and danger alert calculator A display that receives each output and generates a display signal to display the measurement position and altitude information of the GPS receiver and the position and height information of the obstacle stored in the altitude / map memory on the same screen at the minimum. Map table for aircraft consisting of vessels In the display device, the altitude information of the own device is corrected by QNH correction of the barometric altimeter without using the GPS receiver and by the outside air temperature obtained by the outside air thermometer. A means for correcting the ground speed and turning rate measured by the receiver by a value obtained by multiplying the calculation time by the calculation time, and an automatic altitude when the ground speed measured by the GPS receiver reaches a certain speed or more. When you input a GS switch that has a program that activates an alarm and a waypoint and a desired flight altitude, the ground above the flight altitude on the flight route is displayed in red on the screen, the flight altitude is raised and the red disappears. A map display device for an aircraft, comprising: a flight route safety altitude inquiry means for obtaining a flight route safety altitude. 2. A position measuring means which is mounted on the aircraft and which measures the two-dimensional absolute current position of the aircraft, an altitude measuring means which measures the altitude of the aircraft, and a two-dimensional position of an obstacle such as terrain. And three-dimensional information of the display range read out from the map memory, a map memory for storing three-dimensional information of height and height, a display range calculating means for calculating a display range based on the current position measured by the position measuring means. And a memory search for searching the three-dimensional information stored in the map memory within the display range output from the display range calculating means and generating an alarm signal when an obstacle is present. In a map display device for an aircraft comprising means and an alarm means for issuing an alarm on the basis of the alarm signal, a barometer, a temperature measuring means for measuring an outside air temperature, and the barometer are provided. Signal to absolute altitude A map display device for an aircraft, further comprising means for converting and further correcting the absolute altitude based on the output signal of the temperature measuring means. 3. A position measuring means, which is mounted on the own device, for measuring the two-dimensional absolute current position of the own device, an altitude measuring device for measuring the altitude of the own device, and a speed measuring device for measuring the speed of the own device. A map memory for storing two-dimensional position and three-dimensional information of height of an obstacle such as terrain; display range calculating means for calculating a display range based on the current position measured by the position measuring means; In a map display device for an aircraft, which comprises a display for superimposing and displaying the own position and three-dimensional information of the display range read from the map memory, a correction for correcting the measured position of the own device. A map display device for an aircraft, further comprising means. 4. A two-dimensional position of an obstacle such as a terrain, which is installed in the aircraft and which measures a two-dimensional absolute current position of the aircraft, an altitude measuring means for measuring the altitude of the aircraft. And three-dimensional information of the display range read out from the map memory, a map memory for storing three-dimensional information of height and height, a display range calculating means for calculating a display range based on the current position measured by the position measuring means. And a memory search for searching the three-dimensional information stored in the map memory within the display range output from the display range calculating means and generating an alarm signal when an obstacle is present. In an aircraft map display device comprising means and an alarm means for issuing an alarm based on the alarm signal, a speed measuring means for measuring the speed of the own machine, and an own machine obtained by the speed measuring means. The speed of A map display device for an aircraft, further comprising means for causing the alarm means to generate an alarm based on the alarm signal after the aircraft has reached a predetermined speed after takeoff. 5. A position measuring means, which is mounted on the own device, for measuring the two-dimensional absolute current position of the own device, an altitude measuring device for measuring the altitude of the own device, and a speed measuring device for measuring the speed of the own device. And a map memory for storing three-dimensional information of two-dimensional position and height of obstacles such as terrain, display range calculation means for calculating a display range, and three-dimensional information of the display range read from the map memory. In an aircraft map display device including a display for displaying, a way point input means for inputting a way point, an altitude input means for inputting a desired flight altitude, and a way point input means Of the three-dimensional information such as the terrain displayed on the display based on the output signal and the output signal of the altitude input means, a different color is used so that a part higher than the flight altitude can be distinguished from other parts. A map display device for an aircraft, further comprising a display unit.