JP4660301B2 - Drawing method, drawing apparatus and program thereof - Google Patents

Description

  The present invention relates to a drawing apparatus used for drawing processing such as map painting with a coastline as a boundary, for example.

  Conventionally, a drawing apparatus for drawing a graphic has been developed by the present inventors (see, for example, Patent Document 1). In a conventional drawing device, for example, when a map is painted in different colors with a coastline as a boundary, a line segment indicating the coastline is designated, and the left and right sides of the line segment are designated as land and ocean, respectively. The process of painting with the set color is performed.

  However, in the conventional drawing apparatus, it is necessary for the operator to make the designation as described above. Also, depending on the shape of the map, the operator may not be able to determine which is land or ocean with respect to the coastline, and the operator has a heavy load, such as requiring skill.

In particular, when the map to be processed does not have a loop shape closed on the coastline on the screen, it is difficult to distinguish between land and ocean. Also, even if the operator can discriminate between land / ocean, as a pre-processing to perform painting separately, the drawing device needs to add a supplementary line to the coastline segment on the screen to make a closed loop, and the device There was also a problem that the load on was heavy.
Japanese Patent Application No. 2003-388117

In a conventional drawing apparatus, for example, when performing drawing processing such as painting to make it possible to visually recognize the difference between the land and the ocean, not only the operator is heavy, but the processing load of the device is also heavy. There was a problem.
The present invention has been made to solve the above-described problems, and provides a drawing method, a drawing apparatus, and a program therefor, which have a low load on an operator and apparatus in a process of drawing a map having a visually different area. For the purpose.

  In order to achieve the above object, the present invention provides a drawing method of a drawing device for drawing a map and visually displaying the map by an altitude at an arbitrary position on the map based on the map data stored in the map storage means. A data reading process in which the control means of the drawing apparatus reads the altitude data from the altitude storage means for storing the altitude data to be read; the altitude data at any position on the map read by the control means in the data reading process; Compare the altitude indicated by the reference line, determine the height of the area containing the arbitrary position divided by the reference line and the area not including the arbitrary position, and include the arbitrary position based on this determination result A creation process for creating a map that visually differs between an area and an area that does not include an arbitrary position; and a display process in which the display means visually displays the map created in the creation process under the control of the control means; And so that configured by including.

As described above, in the present invention, by comparing the altitude data at an arbitrary position on the map based on the map data with the altitude of the reference line, an area including an arbitrary position divided by the reference line, Determine the height of an area that does not include an arbitrary position, and create and display a map that visually differs between an area that includes an arbitrary position and an area that does not include an arbitrary position based on the determination result. I am doing so.
Therefore, according to the present invention, a drawing method, a drawing apparatus, and a program thereof that draw a visually different map for each area divided by a reference line and have a small load on an operator or apparatus in the processing required for the map are provided. Can be provided.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows the configuration of a drawing apparatus according to an embodiment of the present invention. The drawing apparatus includes an input unit 10, a storage unit 20, a display unit 30, a print unit 40, and a control unit 50.

  The input unit 10 receives a request from an operator, and may be a keyboard, a pointing device such as a mouse, a pen-type input device using a tablet, or the like.

  The storage unit 20 stores various data including a control program, a drawing program and control data of the control unit 50, map data, and altitude data. The map data is data for drawing a map, and the data format may be raster type data or vector type data. The altitude data is associated with the information of the map data and is information indicating altitudes (elevation, sea level, water depth, etc.) at a number of positions on the map.

The display unit 30 is a display unit using a CRT (Cathode Ray Tube), an LCD (Liquid Crystal Display), or the like, and visually displays various information including graphics such as maps according to instructions from the control unit 50. Is displayed.
The print unit 40 prints various types of information such as a map on a paper medium or the like in accordance with instructions from the control unit 50.

  The control unit 50 controls the respective units of the drawing apparatus in an integrated manner. The control unit 50 draws a map according to a drawing program stored in the storage unit 20 and outputs the drawn map on the display unit 30. And a control function for printing on a paper medium or the like through the printing unit 40. The control unit 50 includes a memory used as a work area for performing data processing.

  Next, the operation of the drawing apparatus having the above configuration will be described. In the following description, a process of painting the target map with the reference line as a boundary will be described. Here, a coastline is taken as an example of the reference line. In addition, this process is executed by the control unit 50 reading a drawing program from the storage unit 20 in response to a request from the operator via the input unit 10 and according to the read drawing program. FIG. 2 shows a flowchart of the above processing.

  First, in step 2a, the control unit 50 receives designation of the altitude of the target area and the reference line from the operator through the input unit 10, and proceeds to step 2b. The target area is for designating a map area to be processed in the process among the map data stored in the storage unit 20. Further, the altitude of the reference line is designated as 0 m in order to use the reference line as a coastline in this example.

  In step 2b, the control unit 50 reads from the storage unit 20 the map data of the area designated as the reference line in step 2a and the altitude data corresponding thereto. Further, the control unit 50 detects the reference line in the area based on the read map data, altitude data, and the altitude specified in step 2a, and proceeds to step 2c.

  In step 2c, the control unit 50 refers to the altitude data corresponding to the area read in step 2b among the altitude data stored in the storage unit 20, and includes an area with an altitude higher than the reference line detected in step 2b, An area at an altitude lower than the reference line is determined, and the process proceeds to step 2d.

  As an example of a specific determination method in step 2c, reference is made to the altitude data at an arbitrary position on the area read out in step 2b, and when the altitude at this position is higher than the altitude of the reference line, Of the divided areas, the area including the position is determined as land, and the remaining area is determined as ocean. If the altitude of the position is lower than the altitude of the reference line, the area including the position among the areas divided by the reference line is determined as the ocean, and the remaining area is determined as the land.

  In step 2d, based on the determination result in step 2c, the control unit 50 paints the map of the area specified in step 2a with different colors for the area higher than the reference line and the area lower than the reference line. The divided display data, for example, display data in which the land is colored green and the ocean is colored blue is generated, and the process proceeds to step 2e.

  In step 2e, the control unit 50 controls the display unit 30 to display the map of the area specified in step 2a separately for land and ocean based on the display data generated in step 2d. The process ends.

  As described above, in the drawing apparatus configured as described above, each area divided by the reference line is more than the reference line based on the altitude of the reference line designated by the operator and the altitude data stored in the storage unit 20. It is determined whether the altitude is high or low, and a map that is colored according to the determination result is displayed on the display unit 30.

  Therefore, according to the drawing apparatus having the above-described configuration, the operator only needs to specify the height of the reference line, and specify the reference line, and also determine which color each of the two areas separated by the reference line is to be painted. In addition, even if the displayed area does not form a closed loop at the reference line, it can be painted without making it a closed loop, and the load on the operator and the apparatus is small.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. Further, for example, a configuration in which some components are deleted from all the components shown in the embodiment is also conceivable. Furthermore, you may combine suitably the component described in different embodiment.

For example, in the above-described embodiment, an example in which the coastline is used as the reference line has been described, but it is also possible to set a predetermined altitude or water depth to be the reference line altitude. In the above-described embodiment, the description has been made on the assumption that the color is separated from the reference line. However, instead of or in addition to this, for example, the area divided by the reference line is different in hatching or the like. Thus, each area may be visually recognized.
In addition, it goes without saying that the present invention can be similarly implemented even if various modifications are made without departing from the gist of the present invention.

1 is a circuit block diagram showing a configuration of an embodiment of a drawing apparatus according to the present invention. The flowchart for demonstrating the drawing process of the drawing apparatus shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Input part, 20 ... Control part, 30 ... Display part, 40 ... Print part, 50 ... Control part.

Claims (6)

In a drawing method of a drawing device that draws a map and visually displays it,
A data reading step in which the control means of the drawing device reads the altitude data from altitude storage means for storing altitude data indicating the altitude of an arbitrary position on the map based on the map data stored by the map storage means;
The control means compares the altitude data at an arbitrary position on the map read in the data reading step with the altitude indicated by the reference line indicating a certain altitude on the map, and is divided by the reference line The height of the area including the arbitrary position and the area not including the arbitrary position are determined, and based on the determination result, the area including the arbitrary position and the area not including the arbitrary position are visually recognized. The process of creating maps that differ in terms of
A drawing method characterized in that the display means includes a display process for visually displaying the map created in the creation process under the control of the control means. Furthermore, the operator includes a reception process in which the control means receives the designation of the area to be drawn from the operator,
2. The drawing method according to claim 1, wherein, in the creation process, the control unit creates a map visually different from the reference line for the region received in the reception process. In a drawing device that draws a map and visually displays it,
Map storage means for storing map data for drawing a map;
Altitude storage means for storing altitude data indicating the altitude of an arbitrary position on the map based on the map data stored in the map storage means;
By comparing altitude data at an arbitrary position on the map based on the map data with an altitude indicated by a reference line indicating a certain altitude on the map, the arbitrary position divided by the reference line is included. A map that visually distinguishes between an area that includes the arbitrary position and an area that does not include the arbitrary position, based on the determination result, by determining the level of the area and the area that does not include the arbitrary position. Creating means to create
A drawing apparatus comprising: display means for visually displaying a map created by the creating means. In addition, from map data stored in the map storage means from the operator, the receiving means for receiving the designation of the region to be drawn,
The drawing apparatus according to claim 3, wherein the creating unit creates a map visually different from the reference line with respect to the region received by the receiving unit. In a drawing device program that draws a map and visually displays it,
Map storage means for storing map data for drawing a map;
Altitude storage means for storing altitude data indicating the altitude of an arbitrary position on the map based on the map data stored in the map storage means;
By comparing altitude data at an arbitrary position on the map based on the map data with an altitude indicated by a reference line indicating a certain altitude on the map, the arbitrary position divided by the reference line is included. A map that visually distinguishes between an area that includes the arbitrary position and an area that does not include the arbitrary position, based on the determination result, by determining the level of the area and the area that does not include the arbitrary position. Creating means to create
A program for causing the drawing apparatus to function as display means for visually displaying a map created by the creating means. In addition, from map data stored in the map storage means from the operator, the receiving means for receiving the designation of the region to be drawn,
The program according to claim 5, wherein the creating unit creates a map visually different from the reference line with respect to the area received by the receiving unit.

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