JPH09204141A - Map display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct a display true height into proper one and display it by storing a correction value in correspondence relation to position information when a correction instruction for land height data on a display map is made, and changing the true height data by referring to the correction value and displaying the true height data. SOLUTION: To a processor 1, a correction value storage means 7 is connected which with the correction value for true height data on a position on the map corresponding to position information is stored. The processor 14 functions as a correction value storage control means 1-3 which stores the correction value in the correction value storage means 7 in a correspondence state in response top the correction instruction from an input device 6. Further, the processor functions as a true height data change display control means 1-4 which changed the true height data to be displayed by referring to the correction value in the correction value storage means 7. Then when the correction instruction for the true height data on the displayed map is made, the correction value is stored while made to correspond to the position information and when the true height data are displayed, the true height data to be displayed are changed by referring to the correction value and displayed.

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 capable of displaying an image of a map on a display device and indicating a desired position on the displayed map to display the altitude of the point. is there.

[0002]

2. Description of the Related Art As shown in FIG. 16, a map display device has a structure in which a main storage device 2, a CD-ROM drive 3, a display device 5, an input device 6 and the like are connected to a processing device 1A. A CD-ROM 4 storing map information is inserted into this CD-ROM drive to store map information in the main storage device 2.
The map information corresponding to the operation from the input device 6 is displayed on the display device 5. Where C
The D-ROM 4 includes a CD-ROM group 4-1 in which image data of topography, contour lines and other map information is stored, and a CD-ROM in which the map is divided into sections of a predetermined size and the elevation data of each section is stored. ROM group 4-2 is used. CD-RO
The image of the map in which the map of the desired area of the M group 4-1 is stored and the corresponding one of the CD-ROM group 4-2 is taken out and set in the CD-ROM drive 3 in order. Read the data and elevation data. Then, the processing device 1A reads the image data of the map and the altitude data of the CD-ROM 4 and stores them in the main storage device 2. The main storage device 2 stores a program for displaying an image of a map and an altitude, and the processing device 1A operates using this program. That is, when the latitude and longitude of the desired position of the map read above is input from the keyboard 6-1 of the input device 6, the processing device 1A receives the latitude and longitude, and the above is input from the image data of the map in the main storage device 2. Image data in a rectangle with one side having a predetermined length centering on the latitude and the longitude is cut out and sent to the display device 5 for display. Mouse 6 at the desired position on the displayed map
When it is clicked at -2, the latitude / longitude and the altitude data of the position are displayed, for example, on the display device 5 at a position below the display position of the map (for example, FIG. 12).

[0003]

However, since one altitude data is set for each rectangular area of one side having a predetermined length, it is displayed when a contour line on a map or a peak is specified. There is a problem in that the altitude of the map may not match the contour lines on the map or the altitude of the summit, which may look unnatural to the user.

Further, there is a problem in that the point on the display and the point of the displayed altitude may deviate due to the distortion on the screen display, which may cause the user to look unnatural. Further, although the elevation data of the CD-ROM may include an error, correction data cannot be written, and an appropriate elevation display cannot be obtained.

The present invention has been made to solve the above-mentioned problems of the conventional map display device, and an object of the present invention is to provide a map display device which can correct and display the altitude to be displayed. Is to provide.

[0006]

According to a first aspect of the present invention, there is provided a map display device according to a first aspect of the present invention, wherein the map image storage means stores image data of a map and the map is divided into sections of a predetermined size. Unwritable altitude data storage means in which data is stored, display means for displaying information, map display control means for displaying a map on the display means based on image data read from the map image storage means, Position designation means for designating the position on the map displayed on the display means, and elevation data corresponding to the location designated by the position designation means from the elevation data storage means and displayed on the display means. The data display control means, the correction instruction means for instructing the correction of the altitude data at the displayed position on the map, and the correction value of the altitude data at the position on the map are used as the position information. Correction value storage means for storing the correction value, correction value storage control means for storing the correction value in the correction value storage means in association with the position information in response to the correction instruction from the correction instruction means, and the altitude data. When displaying, the altitude data change display control means for changing the displayed altitude data with reference to the correction value of the correction value storage means is provided. As a result, when there is an instruction to correct the altitude data of the position on the displayed map, the correction value is stored in association with the position information in response to this, and when the altitude data is displayed, the correction value is The altitude data to be displayed is changed with reference to the display.

According to another aspect of the map display device of the present invention, the map image storage means and the elevation data storage means are each a CD-ROM. This allows
The altitude data written in the CD-ROM can be corrected and displayed, and the display of an appropriate altitude is ensured even though the storage medium cannot be written.

A map display device according to a third aspect of the present invention comprises a main storage device for reading and storing the map image data of the map image storage means and the altitude data of the altitude data storage means, and at the time of display, It is characterized in that the map image data and the altitude data are obtained from the main storage device. As a result, the data in the CD-ROM can be expanded in the main storage device and quickly displayed.

According to another aspect of the map display device of the present invention, the correction value storage means is a writable, non-volatile or battery-backed storage device. This makes it possible to replace the CD-ROMs for display and obtain corrected data of the elevation data of the respective CD-ROMs for proper map display.

In the map display device according to the fifth aspect, the image data reduction / enlargement means for reducing or enlarging the map image data in the map image storage means to create display image data, and the scale of the map to be displayed. A map display control means, wherein the map display control means performs display using the image data reduced or enlarged by the image data reduction / enlargement means in accordance with a scale instruction from the scale instruction means. . As a result, a desired scale can be selected, a map can be displayed, and appropriate elevation data can be obtained.

[0011]

DETAILED DESCRIPTION OF THE INVENTION A map display device according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, the map display device according to the embodiment of the present invention is
CD-ROM group that stores map image data 4-
1 and the map are divided into sections of a predetermined size, and a CD-ROM group 4-2 in which the elevation data of each section is stored is used. C
The image data of the map of about 100 km square is stored in one sheet of the D-ROM group 4-1 while the CD-RO is stored.
One of the M-groups 4-2 includes one of the CD-ROM groups 4-1.
Elevation data is stored for each sheet. In the case of a map of Japan, 400 blocks of 100 km square can be collected to display the whole land, so the CD-ROM group 4-
The numbers 1 and 4-2 are 400 sheets, respectively. Elevation data is set about every 250 m square. CD-ROM group 4
-1 of which the map of the desired area of -1 is stored and one of the corresponding CD-ROM group 4-2 is taken out and set in the CD-ROM drive 3 in order. The processing device 1 is
It is configured by a CPU or the like that controls each unit using data and programs stored in the main storage device 2. When the CD-ROM 4 is set in the CD-ROM drive 3, the processing device 1 stores the CD-ROM 4 in the CD-ROM 4. The image data of the map and the altitude data are read and stored in the main storage device 2. The processing device 1 includes a keyboard 6-1 of the input device 6.
When the latitude and longitude of the desired position of the map read from above is input, it is received, and the latitude and longitude input from the image data of the map of the main storage device 2 is the center, and one side is 60 km square. Of the image data is cut out and sent to the display device 5 which is the display means to be displayed and functions as the map display control means 1-1. When the desired position on the displayed map is clicked by the mouse 6-2 which is the position indicating means, the processing device 1 retrieves the latitude / longitude and altitude data of the position from the main storage device 2, and, for example, in the display device 5. It functions as the altitude data display control means 1-2 which is displayed below the display position of the map.

The processing device 1 is connected to a correction value storage means 7 for storing the correction value of the altitude data of the position on the map in association with the position information. The correction value storage means 7 is a non-volatile or battery-backed storage device, that is, an EEPROM or a battery-backed RAM.
It consists of. The processing device 1 functions as a correction value storage control unit 1-3 which stores the correction value in the correction value storage unit 7 in association with the position information in response to the correction instruction from the input device 6 as the correction instruction unit. The processing device 1 is
When displaying the altitude data, it functions as altitude data change display control means 1-4 for changing the altitude data to be displayed with reference to the correction value of the correction value storage means 7.

In the main memory 2, as shown in FIG. 2A, the correction value storage means 7 corresponding to the CD-ROM number (1 to 400 because the map of Japan can be composed of 400 blocks). Correction data storage table (Fig. 2 (b))
An address table is stored in which the addresses of (1) and the number of corrected squares (the number corresponding to 250 m square) are stored. The correction data storage table of the correction value storage means 7 has a predetermined number of areas for storing the latitude data, the longitude data, and the corrected elevation data corresponding to the addresses of the corrected data. Latitude data, longitude data, and corrected elevation data can be stored in the empty area. Of course, the corrected elevation data can be overwritten on the area where the data is already stored.

FIG. 3 shows the key arrangement of the keyboard 6-1. Numeric keys from “1” to “0” are arranged in the ten-key block 11. The scroll key block 12 is provided with four scroll keys for instructing the scroll direction (left, right, up and down) of the screen. A position input / start key 13, a correction / confirmation key 14, and a scale selection key 15 are also provided. The position input / start key 13 is used for position input, the correction / confirmation key 14 is used for correction of elevation data, and the scale selection key 15 is used for selecting a scale. In this embodiment, the scale is prepared to be 1 / 240,000, 1 / 100,000, and 1 / 50,000, and the image data of these maps is stored in the CD-ROM 4 in advance, or the scale of the above is used. Any one of the image data is stored, and the image data reduction / expansion means 1-5 (processing device) performs necessary reduction / enlargement to obtain other scaled image data.

The processing device 1 of the map display device configured as described above performs a display pre-processing operation by the program of the flowchart shown in FIG. 4, which will be described. First, the operator takes out one CD-ROM group 4-1 in which image data of a map of a desired area is stored and one CD-ROM group 4-2 corresponding to the CD-ROM group 4-1.
-Set in ROM drive 3. Normally, they are set one by one alternately, but C which has an auto changer function
In the D-ROM drive 3, two sheets are set and data is read alternately. As shown in FIG. 4, the processing device 1 includes a CD-R set in a CD-ROM drive 3.
The image data of the map is read from one sheet of the OM group 4-1, and this is taken into the main storage device 2 (S41). Next, the CD-RO set in the CD-ROM drive 3
Elevation data is read from one sheet of the M group 4-2 and loaded into the main storage device 2 (S42). Furthermore, the processing device 1
Is an address table in the main storage device 2 (FIG. 2A).
It is detected whether or not there is corrected altitude data based on the
3).

The details of the detection step S43 are shown in FIG. The processor 1 obtains this CD-ROM number when reading the altitude data from one of the CD-ROM groups 4-2 set in the CD-ROM drive 3, and stores this CD-ROM number in the main memory 2 as well. There is. Therefore, in the above determination, the CD-stored in the main storage device 2 is used.
The ROM number (for example, n) is taken out (S43-1),
The number of squares of data stored in the address table corresponding to the CD-ROM number n is detected (S43-
2) It is detected whether or not the number of data is "0" (S43-
3). Here, if the number of data is not "0", the flag with corrected altitude data is set (S43-4), and if the number of data is "0", the flag without corrected altitude data is set (S43-5). .

Then, in the flowchart shown in FIG. 4, when it is detected that the corrected altitude data is present, the corrected altitude data is read from the corrected value storage means 7 and the altitude data in the main memory 2 is updated (S44). Further, when the absence of the corrected altitude data is detected, the pre-processing operation of this display is ended.

Further, the processing device 1 performs the display and elevation data correction operation by the program of the flowchart shown in FIG. 6, which will be described. From the keyboard 6-1 of the input device 6, the latitude and longitude of the desired position on the map read above are input. That is, when the position input / start key 13 of the keyboard 6-1 shown in FIG. 3 is operated, the processing device 1 displays the latitude and longitude input frames as shown in FIG. 8 at the bottom of the screen of the display device 5. , Wait for latitude and longitude input. Here, the operator inputs the longitude and the latitude by numbers of predetermined digits. That is, in the case of a map of Japan, it is input as "OO degree OO minutes" in the north latitude and "OO degree OO minutes" in the east longitude. Of course, you may input up to "second" under "minute". When this position input is completed, the operator again operates the position input / start key 13 of the keyboard 6-1. In response to this, the processing device 1 cuts out image data of a 60 km square map centered on the above position and displays it on the display device 5. Here, as shown in FIG. 9, the image data of the map is formed by adding the position data by north latitude and east longitude to the header corresponding to 250 m square and continuing the image data as shown in the map. Addressed to be arranged in a plane. Therefore, when the position is input, it is easy to retrieve the image data at the corresponding position. Then, the image data in the range of 30 Km vertically and horizontally centering on the input position is cut out, read and held, and the header is deleted and sent to the display device 5. Also, the scale is reduced by 24 each time the scale selection key 15 is operated.
It will be cyclically changed from 1 / 10,000 to 1 / 100,000, 1 / 50,000 or 240,000. FIG. 11 shows a display example of a map of 1 / 50,000, for example, displayed in this way. In this figure, MP indicates a mouse pointer, and the display of the mouse pointer MP is moved as the mouse 6-2 moves.

The operator moves the mouse 6-2 to position the mouse pointer MP at the position where the altitude is desired to be displayed, and clicks the left operation button of the mouse 6-2. This allows
The processing device 1 obtains the position information of the mouse pointer MP at this time, extracts the altitude data in the main storage device 2, and collects the position information (data of north latitude and data of east longitude) together with FIG.
Displayed at the bottom of the screen of the display device 5 as shown in FIG. That is,
The position information of the mouse pointer MP has a one-to-one correspondence with the address in the display memory in the display device 5. This address is associated with the address of the image data (data with the header shown in FIG. 9) of the display range read and held from the main storage device 2 as described above. Therefore, one frame of image data (250 m square image data) at the position where the mouse pointer MP exists is specified from the position information of the mouse pointer MP, and the header data of the one frame of image data is extracted, The display data is for displaying the position as shown in. At the same time, the corresponding elevation data is read from the main storage device 2 on the basis of the header data (positional information) and sent to the display device 5 as display data. For example, when the scale of the map of FIG. 12 is 1 / 50,000 and one square corresponds to 250 m square, the elevation data group corresponding to this is as shown in FIG. That is, the altitude data is stored corresponding to each square. Actually, the elevation data also has a structure in which the position information (data of north latitude and data of east longitude) is used as a header and the elevation data is attached to the same as the image data of the map shown in FIG. . Therefore, one frame of image data and elevation data are associated with each other using the header as a key. Therefore, when the mouse 6-2 is clicked when the mouse pointer MP is at the display position in FIG. 12, “930” at the coordinate position (6, 2) in the table in FIG. 13 is obtained. , This is displayed as altitude (altitude).

In the state in which the altitude of the map is displayed in this way, the processing device 1 monitors the presence / absence of the operation of the correction / confirmation key 14 of the keyboard 6-1 to input the correction input as shown in FIG. Has been detected (S6
2) When the correction / confirmation key 14 is operated, the altitude data is corrected (S63) and the corresponding data in the correction value storage means 7 is updated / saved (S64). FIG. 7 shows a flowchart of the detailed process of steps S63 and S64, and the description will be made based on this. Now, the table of elevation data is as shown in FIG. 14, and when the mouse 6-2 is clicked when the mouse pointer MP is at the position of FIG. 12, (6, 2) of the table of FIG. 14 is displayed. "830" at the coordinate position is obtained, and this is displayed as the altitude (altitude). This elevation is obviously wrong when viewed from the contour lines of the map of FIG. Then, the operator operates the correction / confirmation key 14 of the keyboard 6-1. On the other hand, when the processing device 1 detects the operation of the correction / confirmation key 14 of the keyboard 6-1, the display column of the altitude of FIG. 12 is displayed instead of the corrected altitude (elevation) as shown in FIG. Waits for the input of the altitude data related to (1), and when the altitude data related to the correction (for example, "930") is input, this is taken in (S60-1). Then, the processing device 1 waits for confirmation of the input altitude data by re-operation of the correction / confirmation key 14 of the keyboard 6-1 (S60-2),
When this confirmation input is made, the CD-ROM number held in the main storage device 2 is taken out (S60-3),
The corresponding address ADR (for example, ADRn) is obtained from the address table shown in (a) (S60-4), and the address ADRn of the correction data storage table of FIG.
The corrected elevation data "930" is written in the empty area of the item together with the latitude and longitude data (S60-5). Further, the processing device 1 increases the number of squares data of the address ADRn in the address table by “1” (S60-6), and proceeds to step 65 of FIG.

In step S65, the processor 1 detects whether or not the recorrection input is made by monitoring whether or not the correction / confirmation key 14 of the keyboard 6-1 is operated, and the correction / confirmation key 14 is detected. When there is an operation, the process returns to step S63 and the operation corresponding to the correction is performed again. In case of re-correction, the corrected elevation data is overwritten. on the other hand,
If the re-correction is not input, the corrected map display is performed using the altitude data “930” related to the correction (S66).
As a result, the elevation displayed as "830" in the elevation data table shown in FIG. 14 is changed to "930" based on the table shown in FIG.

As described above, according to the present embodiment, the correction of the elevation data is instructed by the correction request from the keyboard 6-1 and the appropriate correction data is input to correct and display the elevation data. can do. The mouse 6-2 of the input device 6 functions as a position instructing unit, and the keyboard 6-1 functions as a correction instructing unit and a reduction / enlargement instructing unit.

In the above embodiment, the keyboard 6 is used.
Although the position input instruction and the altitude correction instruction are given from -1, in other embodiments, in addition to the above, or
Regardless of the above, for example, by positioning the mouse pointer MP at a predetermined position where the map is not displayed on the display screen and clicking the mouse 6-2, the processing device 1
It operates so as to open a so-called pop-up window, where items of operation instructions such as scale, position input, and altitude correction are displayed as shown in FIG. 15, and the mouse pointer MP is positioned at a necessary item, and the mouse 6-2 It is configured to input necessary instructions by clicking. The processing device 1 receives the position data obtained by clicking the mouse 6-2, and recognizes that it is an instruction corresponding to the coordinate position. According to this embodiment, it is possible to easily input an instruction using the mouse 6-2 and improve the operability.

Further, the position designation after reading the map image data and the altitude data of the CD-ROM 4 does not have to be the center of the range to be displayed, and the position desired to be displayed is input. It is also possible to adopt an embodiment in which the processing device 1 receives this input and cuts out the area including the position. In particular,
The processing apparatus 1 normally processes as a center in the same manner as in the above-described embodiment. However, in the case of protruding from the end of 100 km square, when the center is used, 60 km from the protruding end is cut out as one side. According to this, the user can input the position without being aware of the center, which is convenient. Further, the position may not be designated, and the center of the 100 km square map or the 60 km square at either end may be automatically displayed, and the operator may scroll to display the desired position. Also, if the corrected elevation data is used, a special indication that the correction was made (for example,
It may be displayed in reverse display or blink display).

[0025]

As described above, according to the first aspect of the present invention.
According to the invention, when there is an instruction to correct the altitude data of the displayed position on the map, the correction value is stored in association with the position information, and when the altitude data is displayed, Since the altitude data to be displayed is changed and displayed by referring to the correction value, the altitude data is corrected to display an appropriate map even though the altitude data is stored in a non-writable medium. It can be carried out.

As described above, according to the second aspect of the present invention, the altitude data written in the CD-ROM can be corrected and displayed, and a non-writable storage medium can be used. In spite of this, an appropriate altitude indication is secured.

As described above, according to the invention of claim 3 of the present invention, the data of the CD-ROM is expanded in the main storage device to enable quick display, and the map display with high speed and good followability can be realized. There is an effect that is made.

As described above, according to the invention of claim 4 of the present invention, while the CD-ROMs are replaced and displayed, the correction data of the elevation data of each CD-ROM is obtained and an appropriate map is obtained. The display can be configured so that the corrected elevation data is guaranteed to be non-volatile, and the correction result can be displayed at any time.
As described above, according to the fifth aspect of the present invention, there is an effect that a desired scale can be selected, a map can be displayed, and appropriate elevation data can be obtained.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a map display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing contents of an address table and a correction data storage table used in the map display device according to the embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a keyboard used in the map display device according to the embodiment of the present invention.

FIG. 4 is a flowchart for explaining a preprocessing operation of map display by the map display device according to the embodiment of the present invention.

5 is a flowchart for explaining in detail a main part of the flowchart of FIG.

FIG. 6 is a flowchart for explaining a map display processing operation by the map display device according to the embodiment of the present invention.

7 is a flowchart for explaining in detail a main part of the flowchart of FIG.

FIG. 8 is a diagram showing a display example when the position information is input by the map display device according to the embodiment of the present invention.

FIG. 9 is a diagram showing a configuration example of image data of a map in the map display device according to the embodiment of the present invention.

FIG. 10 is a diagram showing a display example when the corrected elevation data is input by the map display device according to the embodiment of the present invention.

FIG. 11 is a diagram showing a display example of a map displayed by the map display device according to the embodiment of the present invention.

FIG. 12 is a diagram showing a display example of an altitude and a map displayed by the map display device according to the embodiment of the present invention.

13 is a diagram showing a map table of elevation data corresponding to the map of FIG.

FIG. 14 is a diagram showing a map table of an altitude data group including erroneous altitude data.

FIG. 15 is a diagram showing a display example of a map displayed by a map display device according to another embodiment of the present invention.

FIG. 16 is a block diagram showing the configuration of a conventional map display device.

[Explanation of symbols]

1 Processing Device 1-1 Map Display Control Means 1-2 Elevation Data Display Control Means 1-3 Correction Value Storage Control Means 1-4 Elevation Data Change Display Control Means 1-5 Image Data Reduction / Enlargement Means 2 Main Memory 3 CD- RO
M drive 4 CD-ROM 4-1 CD-RO in which map image data is stored
M group 4-2 The map is divided into sections of a predetermined size, and the CD-ROM group 5 display device 6 input device 6-1 keyboard 6-2 mouse 7 correction value storage means in which the elevation data of each section is stored

[Procedure amendment]

[Submission date] May 9, 1996

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

[Fig. 2]

[Figure 3]

[Figure 5]

[Figure 8]

[Figure 9]

FIG. 10

FIG. 11

FIG.

FIG. 4

FIG.

FIG. 13

FIG. 14

FIG.

FIG. 6

FIG. 7

FIG. 16

Claims (5)

[Claims] 1. A map image storage means in which image data of a map is stored, an unwritable elevation data storage means in which the map is divided into sections of a predetermined size and the elevation data of each section is stored, and information. And a map display control means for displaying a map on the display means based on the image data read from the map image storage means, and a position on the map displayed on the display means. Position specifying means, altitude data corresponding to the position specified by the position specifying means is obtained from the altitude data storage means, and the altitude data display control means is displayed on the display means, and the position on the displayed map is displayed. Correction instruction means for instructing correction of altitude data, correction value storage means for storing the correction value of the altitude data at the position on the map in association with the position information, A correction value storage control means for storing a correction value in the correction value storage means in association with position information in response to a correction instruction from the correction instruction means, and a correction value of the correction value storage means for displaying altitude data. A map display device comprising: altitude data change display control means for changing the altitude data to be displayed with reference to. 2. The map display device according to claim 1, wherein the map image storage means and the altitude data storage means are CD-ROMs. 3. A main storage device for reading and storing the map image data of the map image storage means and the elevation data of the elevation data storage means, and displaying the map image data from the main storage device, The map display device according to claim 1, wherein the altitude data is obtained. 4. The correction value storage means is a writable, non-volatile or battery-backed storage device, and any one of claims 1 to 3 is preferable.
The map display device described in the item. 5. An image data reduction / expansion unit for reducing or enlarging the map image data in the map image storage unit to create display image data, and a scale instruction unit for instructing the scale of the map to be displayed. 5. The display control means performs display using the image data reduced or enlarged by the image data reduction / enlargement means in accordance with a scale instruction from the scale instructing means. The map display device described in the item.