JPH083837B2 - Map display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention is applied to, for example, an administrative management system, and displays a map of a predetermined area managed by a host computer on a terminal side of a graphic CRT (Cathode Ray Tube) display device. The present invention relates to a map display device to be displayed on.

B. Overview of the Invention The present invention is a map display device that manages map information including the boundaries of administrative districts with a host computer and displays the map information sent from here on a graphic CRT display device on the terminal side. The boundary line of is displayed as a polygonal closed figure, the boundary line and the attribute information of the administrative district are associated with each other through an index, and the attribute information of an arbitrary point is displayed in a multi-window, so that a map of a predetermined area is displayed. You can see the administrative district name, etc. at any point while looking at, so that you can facilitate the administrative management work.

C. Conventional Technology Recently, as a terminal device of online system,
Graphic CRT display devices are attracting attention because they can visually recognize and judge processed information.

For example, in a centralized monitoring control system for disaster prevention, as shown in FIG. 5, a host computer 1 corresponding to a master station
Various information collected in real time from the child station, to keep the graphic information data processing in the auxiliary storage device 1 ₁ such as a magnetic disk, communication line graphic information of range required from Gurafuitsuku CRT display device 2 Is transmitted to this through.

On the other hand, in the graphic CRT display device 2, the transmitted graphic information is constructed into a predetermined segment structure by the microprocessor 3 and stored in the segment buffer 4 corresponding to a storage unit. And graphic processor 5
By this, the graphic information in the range required to be displayed with respect to the graphic information in the segment buffer 4 is cut out, bit-developed at a corresponding position on the frame buffer 6, and a digital image is written.

The frame buffer 6 is a memory physically having a bit corresponding to each pixel on the tube surface of the CTR monitor 7 in a one-to-one manner. In the color display, it has a plurality of bit planes and a lookup table (not shown). The display color is determined by using it. For example, when the frame buffer 6 is composed of three bit planes # 1 to # 3, on / off of the bit corresponding to the graphic information is developed as a combination of bit planes # 1 to # 3. The display on the screen of the CRT monitor 7 is a raster color scan on the frame buffer 6, and a combination of bit-on of each bit-plane # 1 to # 3 is set as an address in the lookup color table. The beam output of R (red), G (green), and B (blue) according to the above is applied to the CRT monitor 7.

The system as described above can be applied to, for example, an administrative management system of a local public entity, which can be expected to speed up and facilitate administrative work. By the way, when it is applied to an administrative management system, it is often convenient to simultaneously display the attribute information of the administrative district at an arbitrary point, for example, the name of the administrative district such as the number of the street and the number of the administrative district when the housing map is displayed.

D. Problems to be Solved by the Invention In the past, when the attribute information as described above was displayed at an arbitrary point, there was no way. As for the reason, because the data of each figure of the map information was created so as to be displayed as a vector, the boundary line of the administrative district is also drawn by joining multiple vectors, and therefore, the arbitrary point and the boundary line are drawn. This is because it is not possible to create a correspondence between the boundary line and the attribute information and display the attribute information of the administrative district at any point. .

An object of the present invention is to provide a convenient map display device capable of displaying attribute information of an administrative district at an arbitrary point while displaying a map of a predetermined area.

E. Means for Solving Problems The present invention creates graphic data so that the boundary line of an administrative district is displayed by a polygonalized closed graphic, and adds an index to each graphic data of the boundary line. , The attribute information of the administrative districts enclosed by each boundary line is stored separately from the map information in the storage unit of the host computer, and the index of the corresponding boundary line is added to the data of each attribute information and the specified point is specified. Based on the attribute information display command, the host computer searches for a boundary line surrounding the point and associates the boundary line with each index of the attribute information to obtain the attribute information of the administrative district surrounded by the boundary line. Set the display window on the screen where the map information is already displayed and the search section that searches from the storage section of the
A multiview function unit for displaying the attribute information sent from the search unit is provided therein.

F. Action For example, it is assumed that a map of a predetermined area is displayed on the screen of a graphic CRT display device. When the operator designates a desired point among these and displays the attribute information of the administrative district at that point, a display window is set in the corner of the screen, for example, and the name of the administrative district at the designated point is displayed. Etc. are displayed. After that, when the operator gives a deletion instruction, the display window and the attribute information are deleted, and the original map information is displayed.

G. Embodiment FIG. 1 is a block diagram showing an embodiment of the present invention, in which the same symbols as in FIG. 5 indicate the same or corresponding portions. In this embodiment, for the province borders of the map information stored in the auxiliary storage unit 1 ₁ of the host computer side, thereby creating a graphic data to display the polygon of the closed figure, each boundary line An index, for example, a number is attached to the figure data to identify the boundary line.
And in the auxiliary storage unit 1 _1, the attribute information of the administrative district surrounded by separately each boundary line map information, for example, to store the administrative district name and the like, the data of each attribute information, and number of the corresponding borderline Use the same number.

Here, in order to store the map of the predetermined area in the segment buffer 4, usually one map is divided into a plurality of meshes due to the capacity limitation, and the host computer side for each map information corresponding to each mesh. The map information of one mesh is stored in the segment buffer 4. In this case, the boundary line may extend across multiple meshes,
If the boundary line is polygonized as described above, one side of the closed figure is displayed along the edge of each mesh. When This state is shown in FIG. 2, two mesh screen M _1, the boundary line a that One straddle the M ₂ are mesh screen M _1, M ₂ at respective two closed figures
Displayed as a ₁ and a ₂ . However, with such a display method, one side of the closed figure extending along the edge of the mesh may be recognized as a part of the boundary line. Therefore, in this embodiment, the boundary lines that are divided and displayed (in FIG. 2,
The lines along the edges of meshes (corresponding to a ₁ and a ₂ ) are displayed in the background color.

Next, FIG. 3 shows an example of graphic processing for the boundary line. For example, the auxiliary storage unit on the host computer side
When storing a road map in 1 ₁ , it is first judged whether or not the boundary line of each administrative district fits within one mesh, and if it fits, the boundary line is polygonized and numbered. 1
If it does not fit in the mesh, the boundary line is polygonized, an unfinished flag is set, and graphic data is created so that the color of the line along the edge of the mesh becomes the background color. And if there is a border line that is already flagged as unfinished,
The same number is assigned to each of those boundary lines that are paired with the boundary line. For example, in the example of FIG. 2, since the unfinished boundary lines a ₁ and a _{2 have} the coordinates PQ of both ends of the lines along the edges of the meshes M ₁ and M ₂ that match each other, these boundary lines a 1
_The same number is assigned to ₁ and a ₂ .

Further, as a component of this embodiment, with the host computer 1 searches portion 1 ₂ is provided, a multi Biyu port function part 5 ₁ is provided in the graphic pro-broken 5. The search section 1 ₂ has a function of searching the boundaries of administrative district including the selected point, searches the attribute information of the corresponding province in correspondence with each number of the boundary lines and the attribute information and multi viewport function unit 5 ₁ has a function of displaying the attribute information by setting the display window on the screen.

Next, the operation of the above embodiment will be described. It is assumed that the CRT monitor 7 of the graphic CRT display device 2 is displaying a road map of a certain area as shown in FIG. Issues a command for displaying the attribute information where the operator specifies the point A with the screen, the search unit 1 ₂ of the host computer 1, the boundary line l surrounding the point A and had not a preparative to its coordinates the attribute information of the same number as the figure number of the search from the auxiliary storage unit 1 _1, and sends the Gurafuitsuku CRT display device 2. And multi-Biyu port functional unit 5 ₁ display window W, for example, the corners of'll go-between screen is set, the attribute information that has been sent in it is displayed. Thereafter, when the operator issues an erase command of the attribute information, multi-Biyu attribute information of'll go-between on the screen to the port function section 5 ₁ is erased, the original map information is displayed.

In the present invention, at least the boundary line of the administrative district in the map information is polygonized and displayed as a closed figure, but other information such as a building may be polygonized and displayed, or It may be displayed as a set of vectors.

H. Effect of the Invention As described above, according to the present invention, since the boundary line of the administrative district is displayed by the polygonal closed figure, it is possible to correspond between the arbitrary point and the boundary line. , By this, it is possible to search for a boundary line surrounding an arbitrary point. Since an index for specifying the boundary line can be attached, it is possible to separately create attribute information of the administrative district surrounded by each boundary line and to associate the boundary line with the attribute information through the index. Therefore, by using the multi-viewport function, for example, while displaying a road map, it is possible to display the attribute information of the administrative district for an arbitrary point on the screen in the display window as needed. Work can be done smoothly and efficiently.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing a display state of a boundary line extending over two meshes,
FIG. 3 is a flow chart showing a part of graphic data processing, FIG. 4 is an explanatory diagram showing an example of a screen, and FIG. 5 is a configuration diagram showing a conventional example. 1 ... Host computer, 1 ₂ ... Search unit, 2 ... Graphic CRT display device, 3 ... Microprocessor, 4 ... Segment buffer, 5 ... Graphic processor, 5 ₁ ... Multiview port function unit, 6 ... Frame pattern Hua, 7 ... CR
T monitor.

Claims (1)

[Claims] 1. A graphic CRT display device is connected to a terminal side of a host computer that manages map information, and the map information sent from the host computer is stored in a storage unit of the graphic CRT display device and stored. In a map display device that displays map information within a specified area for information, the host computer determines whether or not the boundary line of each administrative district stored in the storage unit can be accommodated within one mesh, If it fits, the boundary line is polygonized and numbered. If it does not fit within one mesh, the boundary line is polygonized and the unfinished flag is set. The color of the line along the edge of the mesh. Create graphic data so that is the background color, and if there is a boundary line that has an unfinished flag already set, for those boundary lines that pair with the boundary line A means to store the attribute information of the administrative districts that have the same index as each other and are enclosed by each boundary line separately from the stored map information, and to attach the index of the corresponding boundary line to the data of each attribute information Based on the command to display the attribute information of the specified point, the boundary line including the point is searched, and the administrative area surrounded by the boundary line by associating the boundary line with each index of the attribute information. Attribute information of the computer from the memory of the host computer to retrieve the graphic CRT
A search unit to send to the display device is provided, and a display window is set on the screen where the map information is already displayed on the graphic CRT display device, and the attribute information sent from the search unit is displayed in this window and A map display device comprising: a multi-viewport function unit that erases the attribute information from the screen according to an information erasing command and displays the original map information.