JPH01233568A - Drawing data display system - Google Patents

Abstract

PURPOSE:To realize the unitary management of a wide range of drawing data by loading a small area by unifying the drawing data of the small area in the periphery centering the small area at the time of loading a specific small area to be displayed on a graphic display on a display memory. CONSTITUTION:A digital processing part 4 generates the drawing data 9 by unifying digital data corresponding to continuous drawing (1-3), and divides it to the small areas (11A-11C) at a division part 10, then, stores them in a disk 11. When an operator designates a desired part, loading is performed on a graphic memory 7 centering the area, and furthermore, a part desired to be displayed is designated on a loaded small area. Then, an unrequired small area in the peripheral area centering the small area is deleted, and a new small area is loaded. A peripheral small area always exists on the memory 7 centering a designated area, and it follows that the data in a window on the memory 7 displays the part on the drawing requested by the operator. Therefore, it is possible to perform the continuous scroll of the wide range of drawing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drawing data display method that has a wide area such as a map as drawing data, and projects a small area of the area on a display screen according to an operation.

[Conventional technology]

Figure 3 is a configuration diagram of a conventional drawing data display system. In the figure, 1, 2.3 are actual drawings such as maps, and 4 is drawing 1.
．． 2.3 is a digitization processing unit that digitizes the data, 5 is a disk as a storage medium for storing the digitized drawing data 51°52.53, and 6 is the drawing data 51°52.53 stored in the disk 5. A display processing section 7 performs display processing when displaying on a display screen; 7 a graphic memory serving as a display memory for storing drawing data 51, 52, 53 processed by the display processing section 6; 8 a graphic memory 51.
It is a graphic display such as a CRT or liquid crystal display device that has a display screen that displays 52.53.

Next, the operation will be explained.

The drawings 1.2.3 are converted into digital data in advance by the digitization processing section 4, and the drawing data 51.3 are stored on the disk 5.
It is stored as 52.53.

Here, when the operator performs an operation to display the drawing data 51, 52, and 53 on the display drawing of the graphic display 8, the drawing data 51 selected by the operator
, 52, 53 is loaded into the graphic memory 7 by the display processing unit 6, and then the selected drawing data 51, 52, 53 is displayed on the display screen of the graphic display 8. The drawing data 51, 52, and 53 at this time indicate the drawing data of each small area when a drawing such as a map is divided into predetermined small areas.

[Problem to be solved by the invention]

Since the conventional drawing data display method is configured as described above, for example, even if the drawing 1.2°3 shown in FIG. When displaying, there is a problem in that the operator has to designate each drawing to be displayed one by one while being aware of their positional relationships. Furthermore, since each drawing is treated as an independent drawing, there is a problem in that continuous scrolling between drawings cannot be performed during display.

Furthermore, if the sizes of the display areas of drawings 1, 2, and 3 shown in Fig. 3 are different, the operator selects the display drawing while keeping in mind the connections between each drawing and displays it on the graphic display. , there was a problem that it was difficult to display areas that spanned between drawings, making it difficult to use.

This invention was made to solve the above-mentioned problems, and makes it possible to centrally manage a wide range of drawing data without being aware of the positional relationship of each small area.
An object of the present invention is to obtain a drawing data display method that can perform continuous scrolling and easily display a display area spanning between drawings.

[Means to solve the problem]

The drawing data display method according to the present invention, when loading a specific small area to be displayed on the graph ink display 8 into the display memory, also loads the drawing data of surrounding small areas centered on said small area. It is something.

[Effect]

In this invention, a drawing is divided into small areas of a predetermined size and stored on a disk. On the other hand, during loading, when a specific small area to be displayed on the graphic display 8 is loaded into the display memory, drawing data of small areas around the specific small area are also loaded.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a drawing data display system showing an embodiment of the present invention. In the figure, 9 is drawing data digitized by the digitization processing unit 4 from drawing 1.2.3, and 10 is drawing data 9. small areas 11A, IIB, II of a predetermined size.
Dividing part C, 11 is small area 11A, IIB, I
A disk 61 for storing an IC is a loading unit that loads the small area around the graphic memory 7 when a small area to be displayed on the graph ink display 8 is loaded into the graphic memory 7 according to an operator's operation.

Here, the small areas 11A, IIB, and IIC are shown in FIG. 1.2.
The display area indicated by 3 does not necessarily have the same number of strokes. Although the small areas 11A, IIB, and IIC represent areas of the same size on the display, they do not necessarily have the same amount of internal data.

Even if the display area is the same, the amount of data is different between, for example, vector data for an urban area and vector data for a mountainous area. Note that although the disks 5 and 11 are shown as separate disks, in reality, the data after the division process may be stored in the same portion of the same disk, that is, the data may be overwritten.

Next, the operation will be explained. Prior to displaying the drawing, the following processing is performed. The digitization processing unit 4 generates drawing data 9 for consecutive drawings 1, 2, and 3.

At this time, the digitization processing unit 4 integrates the digital data corresponding to drawings 1, 2, and 3, and generates drawing data 9 as one continuous drawing data. The drawing data 9 is divided into small area units by the dividing unit 10 and area data IIA, I
It is stored on disk in the form of IB and IIC. The above is the generation of internal data prior to displaying the drawing.

Next, the display method will be explained. In Figure 2, IA
indicates drawing data, the inside of which is divided into small areas, each of which is given a number for identification. The difference is that the area data 11A, 11B, and IIC in FIG. 1 indicate the internal data amount, whereas the area data in FIG. 2 expresses the displayed image symmetrically. 2A is internal data loaded onto the graphic memory,
3A is the small area identification number 7B, 8B, 9B, 12B.

A collection consisting of 17B, 4A is a small area identification number 13B,
A group consisting of 14B, 18B, and 19B, and 5A has small area identification numbers 15B, 20B, and 23B.

24B and 25B are shown, each of which shows, in order, a newly loaded part after scrolling, a common part before and after scrolling, and a part deleted from the graphic memory after scrolling.

When displaying, when the operator specifies the part to be displayed, it is determined internally which small area it belongs to, and loading is performed on the graphic memory 7 centering on that area. Second
In the figure, area identification number 19B in the IAO is the area specified by the operator, and surrounding small areas like 2A are loaded around that area. In the example shown in Figure 2, nine small areas around the periphery are loaded, but the graphics memory 7
Depending on the capacity, more small areas can be brought. Further, the designation of a specific small area by the operator is internal and is not made conscious of by the operator. Furthermore, the positional relationship between the small areas is ascertained by the identification number attached to the small area.

If the operator further specifies a part of the small area loaded on the graphic memory 7 shown in FIG. 2A, the surrounding area will be loaded around the corresponding small area, but this is not necessary at that time. The small area is deleted and a new small area is loaded.The small area group of 5A is deleted and the small area group of 3A is newly loaded, centering on the small area.

In this way, a small area around the specified area is always stored in the graph ink memory 7, and considering that on the actual screen a part of the graphic memory is displayed in the form of window settings, it is possible to The data in the window on the memory 7 always displays the portion of the drawing requested by the operator, thereby realizing continuous scrolling of a wide-range drawing.

In the above example, a case has been described in which individual drawing data are integrated to create one graphic data, but a drawing expressing a wide area may be digitized as is into graphic data.

[Effects of the Invention] As explained above, the present invention is advantageous in that when loading a small area to be displayed on a graph ink display into the display memory, the four peripheral areas around the specific small area are loaded into the display memory.
Since the drawing data of the J'JJI area is loaded together, continuous scrolling can be performed, there is no need to grasp the positional relationship of each small area, and display areas that span between drawings can be displayed. It has the effect of making it easier.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram for explaining a drawing data display method according to an embodiment of the present invention, FIG. 2 is a diagram showing a display method of a drawing data display device, and FIG. 3 is a configuration diagram of a conventional drawing data display method. It is a diagram. 1.2.3... Drawing, 4... Digitization processing section, 5
, 11... Disk, 10... Division processing unit, 6...
- Display processing unit, 61... Loading unit, 7... Graphic memory (display memory), 8... Graphic display.

Claims (1)

[Claims] Drawing data such as maps is divided into small areas of a predetermined size and stored in a storage medium, and specific small areas of the drawing data are loaded into the display memory according to the operator's operations and displayed on the graphic display. This drawing data display method is characterized in that when loading the above-mentioned small area to be displayed on a graphic display into the display memory, drawing data of surrounding small areas centered on the above-mentioned small area are also loaded. Drawing data display method.