JPH023083A - Map display device - Google Patents

Abstract

PURPOSE:To speedily display a map by decentralizingly processing a large volume of map data by region-by-region display devices installed on a small region basis. CONSTITUTION:The title device is provided with a map file server device 13 which divides map data covering a comparatively larger area and stored in an auxiliary storage part 13a into comparatively smaller area map data, and which transfers them through a communication line 14. The device is also provided with plural region-by-region display devices 101-10N which are installed on a small region basis, store small area map data transferred through the communication line 14 in main storage parts 11a1-11aN, and process and display the stored map data. Thus, the region-by-region display devices installed in respective areas can decentralizingly process a large volume of map data, thereby speedily displaying a map.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a map display device for displaying a map on a display device such as a CRT.

2. Description of the Related Art Conventionally, this type of map display device includes an auxiliary storage section 21 such as a large-capacity magnetic disk in which map data is stored, and a main control processor 22 stores this map data in a main storage section 22a.
The map is loaded into the map, performs various arithmetic processing, displays the map on the screen of the graphic display 23, and switches the displayed screen.

Problems to be Solved by the Invention However, in the conventional map display device described above, a large amount of map data cannot be stored in the main storage section 22a, but is stored in the auxiliary storage section 21, so that searching for map data,
There is a problem in that the auxiliary storage section 21 must be accessed each time the display or screen is switched, and therefore the display process cannot be performed quickly.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a map display device that can perform map display processing quickly.

Means for Solving the Problems In order to achieve the above object, the present invention divides map data of a relatively wide area stored in an auxiliary storage unit into map data of relatively small areas, and transfers the data via a communication line. A map file server device is installed in each of the small areas, and stores the map data of the small area transferred from the map file server device via a communication line in a main memory. A plurality of regional display devices are provided for processing and displaying stored map data.

According to the above-described configuration, the present invention allows the regional display devices installed in each small region to process a large amount of maps in a distributed manner, so that map display processing can be performed quickly.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to the drawings. ? p,
FIG. 1 is a book diagram showing an embodiment of a map display device according to the present invention.

In FIG. 1, 10. ．． 101-1ON are respectively,
This is a regional display device installed in each region (=N) to display a map of the region, and each region display device 10. -10s are main control processors 111-IIN each having a main storage unit 11a1-118N for storing map data of the area, and a main control processor]
Reference numerals 5 and 13 are regional display devices 10. It is a map file server device that supplies map data of the area to 1 ON, and a map file server device 13, which has auxiliary storage such as a large-capacity magnetic disk that stores map data of the entire area. section 13a, and the map data stored in this auxiliary storage section 13a are displayed on regional display devices 10.about.I as will be described later.
ON p(, main control processor 13b for transmission etc.
And Lord f! It is composed of a graphic display 13C that displays a map processed by the GoSessor 13b.

Main control processor 11 of regional display device 10/-1ON
1 to IIN and the main control processor 13b of the map file server device 13 are connected via a communication line 14.

Next, the operation of the above embodiment will be explained.

In FIG. 1, at the time of starting up all the devices, the main control processor 13b of the map file server device 13 sequentially reads the map data of each region through the auxiliary storage section 13a,
Each regional display device 10.
~10. Transfer to. Main control processor 11, = 11
Each map data of the area is stored in the main memory unit 11.
a! ~11aN.

When this start-up is completed, the main control processors 111 to 111
118 accesses the map data stored in the main storage units 11a+ to 11aN, performs various arithmetic operations, displays the map on the screens of the graphic displays 121 to 12N, and switches the displayed screens.

Therefore, in the above embodiment, the regional display devices 101 to
Since each of the main control processors 111 to IIN of the IOH accesses only the map data of the relevant area, map display processing is performed faster than when accessing the large-capacity auxiliary storage unit 13a as in the conventional example. be able to.

In addition, in the above embodiment, since all the map data for each region is stored in the auxiliary storage section 13a of the map file server device 13, the region display device 10 may
If, for example, one of 1 to 1ON becomes undisplayable,
By storing the map data of that area in a display device of another area, it is possible to display the map of that area on behalf of the display device.

Furthermore, in the embodiment described above, the map data of each area can be managed and maintained at once by the map file server device 13, so there is an effect that map data of a wide range can be unified.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention includes a map file server device that divides map data of a relatively wide area stored in an auxiliary storage unit into map data of a relatively small area, and transfers the data via a communication line. , each of which is installed in each of the small areas, and stores map data of the small area transferred from the map file server device via a communication line in a main storage unit, and stores the map data stored in the main storage unit. Since we have provided multiple regional display devices for processing and displaying, the regional display devices installed in each small region can process large amounts of map data in a distributed manner, thus speeding up map display processing. be able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a map display device according to the present invention, and FIG. 2 is a block diagram showing a conventional map display device. 101-1ON... regional display device, 11. ~3.3
N, 33 b...main control processor, lla+~1
1aN...Main storage section, 121-12N, 13C.
...Graphic display, 13a...Auxiliary storage section.

Claims (1)

[Claims] a map file server device that divides relatively wide map data stored in the auxiliary storage unit into relatively small area map data and transfers the data via a communication line; A plurality of regional display devices that store map data of small regions transferred from a map file server device via a communication line in a main memory, and process and display the map data stored in the main memory. Map display device with.