KR100586602B1 - Raster map overlay method - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a raster map overlay method and a computer readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention uses a selective pixel overlay technique of the raster map to determine an area to be shown on the screen in the resulting raster map, and outputs the screen pixel and screen non-shown pixels separately. Accordingly, to provide a raster map overlay method capable of overlaying an image while maintaining the color of the raster map, and a computer-readable recording medium having recorded thereon a program for realizing the method.

3. Summary of Solution to Invention

The present invention, the first step of displaying a background screen; Setting an overlay target area coordinate on a screen as a minimum bounding rectangle in the background screen; A third step of identifying a visible area with respect to all coordinates of the overlay target area on the screen; And a fourth step of checking whether the current coordinate is the screen drawing pixel, converting the coordinate on the screen into the actual coordinate on the overlay map, and displaying the color in a color corresponding to the screen.

4. Important uses of the invention

The present invention is used in a wireless network design system.

Geospatial systems, raster maps, optional pixel overlays, wallpapers

Description

Raster map overlay method {METHOD FOR OVERLAING RASTER MAP}             

1 is an exemplary configuration example of a raster map overlay apparatus to which the present invention is applied.

2 is a conceptual diagram of an embodiment of a raster map overlay method according to the present invention;

3 is a diagram illustrating an embodiment of a raster map overlay method according to the present invention;

Figure 4 is an embodiment processing flow diagram for the raster map overlay method according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: central processing unit 11: main storage unit

12: auxiliary memory device 13: input and output device

The present invention relates to a raster map overlay method and a computer readable recording medium having recorded thereon a program for realizing the method.

In general, geographic information system (GIS) applications, such as wireless network design systems, operate with more than one map for the same area. Such data includes vector data, image data scanned on paper maps, aerial photographs, satellite imagery, digital elevation models (DEM), and topographical attributes, and includes vector, image, and raster data. data).

In the wireless network design system, various radio wave analysis results are managed in the form of raster map, and in order to show and analyze the radio wave analysis results for a specific region on the screen, it is necessary to simultaneously display terrain data and various analysis results.

Accordingly, although a transparent overlay method or an opaque overlay method is conventionally used, the color of the result map is changed together with the image of the background screen or the raster map, and the shape of the base topography and the analysis result are distinguished. Although it is possible, it is difficult to visually distinguish the clear colors, and since the raster map obscures a background screen such as a feature, there is a problem that the efficiency of the wireless network design work is deteriorated.

Therefore, the present invention has been proposed to solve the above problems, using the selective pixel overlay of the raster map (Selective Pixel Overlay) to determine the area to be displayed on the screen in the resulting raster map, screen display pixels A raster map overlay method that can overlay an image while maintaining the color of the raster map, and a computer-readable recording medium recording a program for realizing the method. The purpose is to provide.

According to an aspect of the present invention, there is provided a raster map overlay method applied to a raster map overlay device, the method including: displaying a background screen; Setting an overlay target area coordinate on a screen as a minimum bounding rectangle in the background screen; A third step of identifying a visible area with respect to all coordinates of the overlay target area on the screen; And a fourth step of checking whether the current coordinate is the screen drawing pixel, converting the coordinate on the screen into the actual coordinate on the overlay map, and displaying the color in a color corresponding to the screen.

The present invention also provides a raster map overlay device including a microprocessor, the first function of displaying a background screen; A second function of setting an overlay target area coordinate on a screen as a minimum bounding rectangle in the background screen; A third function of checking a visible area with respect to all coordinates of the overlay target area on the screen; And a computer readable recording that records a program for realizing a fourth function of confirming whether the current coordinate is a screen drawing pixel, converting the coordinate on the screen into the actual coordinate on the overlay map, and displaying the color in a color corresponding to the screen. Provide the medium.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exemplary configuration example of a raster map overlay apparatus to which the present invention is applied.

As shown in the drawings, the raster map overlay apparatus to which the present invention is applied includes a central processing unit 10 that controls and manages an overall operation, and stores and executes a program performed by the central processing unit 10. And a main storage device 11 and an auxiliary storage device 12 for storing various data which are used during or during work execution, and an input / output device 13 for inputting and outputting data to and from a user.

The auxiliary memory device 12 stores a large amount of data, and the input / output device 13 includes a general keyboard, a display device, a printer, and the like.

However, since the computer hardware environment having the configuration as described above is only a technique well known in the art, detailed description thereof will be omitted herein.

2 is a conceptual diagram of a raster map overlay method according to the present invention, in which "20" is a contour vector map, "21" is a raster map, and "22" is a contour vector. The result map which overlays the map 20 and the analysis result raster map 21 is shown.

3 is a diagram illustrating an example of a raster map overlay method according to the present invention.

First, the background data is displayed on the screen (30), and then the screen boundary coordinates of the overlay target area are set in the background data (31).

Next, with respect to the overlay area on the screen, it is determined whether or not the screen is shown for each pixel, and the coordinates on the screen are converted into actual coordinates on the raster map to be overlaid, and then cell values are read from the raster map and displayed on the screen ( 32). Here, whether or not to display the screen for each pixel is determined by the punctuation function "punctuation (x, y)", where x is the number of pixels to be continuously displayed on the screen, and y is the number of pixels not to be displayed on the screen. it means. That is, "punctuation (3,1)" means that a pixel value is shown on the screen with a rule of ignoring one pixel every three pixels.

The process of performing the overlay with the rule of "punctuation (2,1)" is as shown in "32" and the result is as in "33" in the figure.

4 is a flowchart illustrating an exemplary raster map overlay method according to the present invention.

First, the background image is illustrated (displayed) (40), and the coordinates of the overlay target area on the screen are determined as the lower left coordinate value (min) and the upper right coordinate value (max) using a minimum boundary rectangle (MBR) ( 41). Here, the minimum boundary rectangle is represented by MBR (min (minx, miny), max (maxx, maxy)).

Next, the variable is initialized to process all pixels included in the minimum bounding rectangle (42), and it is determined whether the current lower left x coordinate is smaller than or equal to the upper right x coordinate (43).

As a result of the determination 43, if the current lower left x coordinate is larger than the upper right x coordinate, the overlay is stopped. It is determined whether the small (44).

As a result of the determination (44), if the lower left y coordinate currently being processed is smaller than the upper right y coordinate, it is determined whether the current screen coordinate is visible to the user (45), and the lower left y coordinate currently being processed is greater than the upper right y coordinate. If greater than or equal to 1, the x-coordinate of the coordinate currently being processed is increased by 1 (46), and the process proceeds to step “43”.

As a result of the determination 45, if the current screen coordinate is an invisible area to the user, the y coordinate of the current screen coordinate is increased by 1 (47), and the process proceeds to "44".

As a result of the determination 45, if the current screen coordinate is an area visible to the user, it is determined whether the current coordinate is a screen drawing pixel (48).

As a result of the determination (48), when the current screen coordinate is the screen drawing pixel, after converting the current screen coordinate to the actual coordinate on the overlap map, the cell value is read from the map and displayed in the color corresponding to the screen. If is not the screen pixel, the process proceeds to step 47.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited to the drawing.

The present invention as described above, by using the existing overlay technique and the optional pixel overlay technique in the application running the geographic information system map, it is possible to overlay while ensuring the color of the raster and the image map, the radio network design work There is an effect that can significantly increase the efficiency.

Claims (3)

In the raster map overlay method applied to the raster map overlay device, Displaying a background screen; Setting an overlay target area coordinate on a screen as a minimum bounding rectangle in the background screen; A third step of identifying a visible area with respect to all coordinates of the overlay target area on the screen; And A fourth step of checking whether the current coordinate is a screen drawing pixel, converting the coordinate on the screen into the actual coordinate on the overlay map, and then displaying it in the color corresponding to the screen. Raster map overlay method comprising a. The method of claim 1, The overlay target area coordinates on the screen of the second step is Raster map overlay method characterized in that it is determined by the lower left coordinate value and the upper right coordinate value. In a raster map overlay device having a microprocessor, A first function of displaying a wallpaper; A second function of setting an overlay target area coordinate on a screen as a minimum bounding rectangle in the background screen; A third function of checking a visible area with respect to all coordinates of the overlay target area on the screen; And A fourth function of checking whether the current coordinate is a screen drawing pixel, converting the coordinate on the screen into the actual coordinate on the overlay map, and then displaying it in a color corresponding to the screen A computer-readable recording medium having recorded thereon a program for realizing this.

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