JPH08315124A - Map coordinate data extracting method and map information drawing device - Google Patents

Abstract

PURPOSE: To provide a map coordinate data extracting method and a map information drawing device which lighten the load of the extracting process when a part of a map is displayed, and efficiently displays map information. CONSTITUTION: A classifying device 12 classifies all map coordinate data into plural areas and stores them in an area-classified map coordinate data storage part 16 and a selecting means 13 selects a selection area including a drawing requested range, and an extracting means 14 extracts map coordinate data for display from map coordinate data in the selection area and a screen output means 15 maps the data into screen coordinates to display the data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map information drawing device for drawing map information, and more particularly to a map capable of efficiently drawing a part of map information composed of coordinate data (referred to as map coordinate data). The present invention relates to a coordinate data extraction method and a map information drawing device.

[0002]

2. Description of the Related Art First, a conventional map coordinate data extraction method and map information drawing apparatus will be described with reference to FIGS. FIG. 6 is a configuration block diagram of a conventional map information drawing device, and FIG. 7 is an explanatory diagram showing the concept of a map coordinate data extraction method in the conventional map information drawing device.

As shown in FIG. 6, the conventional map information drawing apparatus basically comprises a processing section 1 ', a storage section 2, a display section 3 and an input section 4. Inside the processing unit 1 ', a reading means 11, an extracting means 14',
Screen output means 15 and display map coordinate data storage unit 17
And are provided.

Next, each part of the conventional map information drawing apparatus will be specifically described. The storage unit 2 stores map coordinate data (referred to as all map coordinate data) forming one map. It should be noted that the map coordinate data stores only the coordinate data indicating the drawing point coordinates in the range of map coordinates forming the one map (all map range).

The display unit 3 is a display device such as a display for drawing (displaying) a part or all of the map information. The input unit 4 is for designating a display range (drawing request range) in all map coordinate data, and uses the point input device such as a mouse in the map information displayed on the display unit 3 to draw the drawing request range. Is to be specified.

The processing unit 1'displays map coordinate data (display map coordinate data) to be displayed from all the map coordinate data stored in the storage unit 2 according to the drawing request range designated by the input unit 4. A control process for extracting and displaying on the display unit is performed.

Next, each section inside the processing section 1'will be described. The display map coordinate data storage unit 17 stores map coordinate data to be displayed (display map coordinate data). The reading means 11 is started when the drawing request range is designated from the input section 4, sequentially reads all the map coordinate data stored in the storage section 2, and the extracting means 1 described later.
It is a means for outputting to 4 '.

The extracting means 14 'is means for extracting the display map coordinate data from all the map coordinate data stored in the storage section 2, and specifically, the map coordinates output from the reading means 11 in order. It is determined whether the data is within the drawing request range specified by the input unit 4, and if the map coordinate data is within the drawing request range, the map coordinate data is stored in the display map coordinate data storage unit 17. Is.

The screen output means 15 is activated when the extraction of the display map coordinate data by the extraction means 14 'is completed, and controls the display based on the display map coordinate data in the display map coordinate data storage section 17. is there. Specifically, the screen output means 15 includes a display map coordinate data storage unit 17
Load the display map coordinate data stored in
The map coordinate data for display is associated with (mapped to) the screen coordinates on the display unit 3 so that the drawing request range designated by the input unit 4 becomes one screen configuration of the display unit 3, and the screen coordinate data to be drawn is displayed. Output to the display unit 3.

Next, the operation of the conventional map information drawing apparatus will be described with reference to FIG. In the conventional map information drawing apparatus, all the map coordinate data that composes one map is stored in the storage unit 2 in advance. When the entire map of the map coordinate data stored in the storage unit 2 is displayed (referred to as whole display), that is, when the drawing request range is the entire map, all map coordinates stored in the storage unit 2 are displayed. The data is sequentially read by the reading means 11 and output to the extracting means 14 ', and since the map coordinate data are all within the drawing request range, all the map coordinate data are displayed by the extracting means 14' as display map coordinate data. The data is stored in the data storage unit 17, is mapped by the screen output unit 15 to screen coordinates for display, and is displayed on the display unit 3.

On the other hand, in the case of displaying a part of the map (referred to as partial display), when the drawing request range is designated by the input unit 4, all map coordinate data stored in the storage unit 2 are sequentially read by the reading means 11. Extraction means 1 read by
4 ', and the extraction means 14' determines whether the map coordinate data is within the drawing request range, and only when the map coordinate data is within the drawing request range, the display map coordinate data storage unit 17 is used as the display map coordinate data. The display map coordinate data is mapped to the screen coordinates for display by the screen output means 15, is output to the display unit 3, and is displayed on the display unit 3.

That is, in the conventional map information drawing device, as shown in FIG. 7, the map coordinate data included in the drawing request range is extracted and displayed from the map coordinate data of the entire map range stored in the storage unit 2. It is supposed to create the map coordinate data for use.

[0013]

However, in the above-mentioned conventional map information drawing apparatus, even when a part of the map is displayed, the extraction target of the display map coordinate data is all the map coordinate data, so that the extraction processing takes time. However, there is a problem in that processing efficiency is poor.

The present invention has been made in view of the above circumstances, and a map coordinate data extraction method capable of efficiently displaying map information by reducing the load of extraction processing when displaying a part of a map. An object is to provide a map information drawing device.

[0015]

According to a first aspect of the present invention for solving the problems of the conventional example, in a map coordinate data extracting method, all map coordinate data are divided into a plurality of areas, and a drawing request range is obtained. Is specified, the area including the drawing request range is specified as a selection area, it is determined whether each map coordinate data in the selection area is within the drawing request range, and a map within the drawing request range is specified. It is characterized in that coordinate data is extracted and displayed based on the extracted map coordinate data.

The invention according to claim 2 for solving the problems of the above conventional example is a storage unit for storing all map coordinate data, an input unit for designating a drawing request range, and a map within the drawing request range. A display unit that displays coordinate data, and a processing unit that reads all the map coordinate data from the storage unit and outputs map coordinate data within the drawing request range to the display unit according to the designation of the drawing request range from the input unit. In the map information drawing device having, the processing unit, a reading unit that reads all map coordinate data from the storage unit, and a sorting unit that sorts all the map coordinate data read by the reading unit into a plurality of areas, An area-specific map coordinate data storage unit that stores the map coordinate data sorted by the sorting unit by area, and the drawing request range by specifying the drawing request range from the input unit. An area including is specified as a selection area, a selection unit that outputs each map coordinate data in the selection area, and a determination is made whether the map coordinate data output from the selection unit is within the drawing request range. Based on the extraction means for extracting the map coordinate data within the range, the display map coordinate data storage section for storing the map coordinate data extracted by the extraction means, and the map coordinate data in the display map coordinate data storage section. And a screen output means for outputting a screen to the display unit.

[0017]

According to the invention described in claim 1, all map coordinate data is divided into a plurality of areas, and an area including the drawing request range is specified as a selection area with respect to the drawing request range.
The map coordinate data extraction method is to judge whether each map coordinate data in the selection area is within the drawing request range, extract the map coordinate data within the drawing request range, and display based on the extracted map coordinate data. Therefore, in the partial display, the map coordinate data for display can be extracted in a processing time proportional to the size of the drawing request range.

According to the second aspect of the present invention, the reading unit of the processing unit reads all the map coordinate data from the storage unit, and the sorting unit sorts the entire map coordinate data into a plurality of areas, and the map coordinate data by area. Stored in the storage unit, the sorting means
According to the designation of the drawing request range from the input unit, an area including the drawing request range is specified as a selection area, each map coordinate data in the selection area is output, and the extraction means outputs the output map coordinate data to the drawing request range. It is determined whether or not it is within the range, the map coordinate data within the range is extracted and stored in the display map coordinate data storage unit, and the screen output means displays it based on the map coordinate data in the display map coordinate data storage unit. Since it is a map information drawing device that outputs a screen to a unit, map coordinate data for display can be extracted in a processing time proportional to the size of the drawing request range in partial display.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. A map coordinate data extraction method and a map information drawing device according to an embodiment of the present invention divides an entire map coordinate range forming one map into a plurality of areas and manages the map coordinate data for each area. Since the display map coordinate data is extracted and displayed from the map coordinate data of the area including the drawing request range, the partial display of the map can be efficiently performed.

A map information drawing apparatus according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration block diagram of a map information drawing apparatus according to an embodiment of the present invention.
It should be noted that the same components as those in FIG. 6 will be described with the same reference numerals.

The map information drawing apparatus of this embodiment is basically the same as the conventional map information drawing apparatus, and comprises a processing unit 1, a storage unit 2, a display unit 3, and an input unit 4. There is.
However, the inside of the processing unit 1 is composed of a reading unit 11, a screen output unit 15, and a display map coordinate data storage unit 17, which are the same as in the conventional case, and further, as a characteristic part of the present embodiment, classification is performed. Means 12, selection means 13, extraction means 14, and area-based map coordinate data storage unit 16 are provided.

Next, each part of the map information drawing apparatus of this embodiment will be concretely described with reference to FIGS. Figure 2
FIG. 3 is an explanatory diagram showing the concept of the sorting means 12 of the map information drawing apparatus of this embodiment, and FIG. 3 is an explanatory diagram showing the configuration of the area-based map coordinate data storage unit 16 of the map information drawing apparatus of this embodiment. 4 is an explanatory view showing the concept of the selection means 13 of the map information drawing apparatus of this embodiment, and FIG. 5 is an explanatory view showing the concept of the extraction means 14 of the map information drawing apparatus of this embodiment. Is.

Incidentally, the storage unit 2, the display unit 3, and the input unit 4
Since it is completely the same as the conventional one, its explanation is omitted here, and only the characteristic part of this embodiment will be explained. The sorting unit 12 of the processing unit 1 is a unit that divides the entire map range into a plurality of areas and divides the entire map coordinate data stored in the storage unit 2 into areas, as shown in FIG. Specifically, the sorting unit 12 is stored in the storage unit 2 in advance, and in the area-based map coordinate data storage unit 16 to be described later, which area is included in the map coordinate data sequentially read and output by the reading unit 11. The map coordinate range is determined by referring to the range and stored in the area-based map coordinate data storage unit 16.

As shown in FIG. 3, the area-by-area map coordinate data storage unit 16 stores the map coordinate range of each area and the map coordinate data contained therein for each area obtained by dividing the range of all map coordinates into a plurality of areas. The number of divisions of the area and the range of map coordinates of each area are set in advance.

The selecting means 13 specifies an area (referred to as a selection area) that includes the drawing request range designated by the input section 4. Specifically, data indicating the drawing request range is input from the input section 4. Upon reception, the selection area is specified by referring to the range of map coordinates in the area-based map coordinate data storage unit 16, and the map coordinate data in the selection area is output to the extraction means 14 in order.

As shown in FIG. 5, the extracting means 14 extracts the display map coordinate data from the map coordinate data in the selecting area. Specifically, the extracting means 14 outputs the map coordinate data in order within the selecting area. Of the map coordinate data is within the drawing request range designated by the input unit 4, and if the map coordinate data is within the drawing request range, the map coordinate data is displayed in the display map coordinate data storage unit 17 To be stored in.

Next, the operation of the map information drawing apparatus of this embodiment will be described with reference to FIG. In the map information drawing apparatus of the present embodiment, all map coordinate data forming one map is stored in the storage unit 2 in advance as in the conventional case. And
The map coordinate data stored in the storage unit 2 is sequentially read by the reading unit 11 and output to the sorting unit 12,
The area is separated by the separating means 12 and stored in the area-based map coordinate data storage unit 16.

When the drawing request range is designated by the input unit 4, the selecting unit 13 specifies the selecting area, and the map coordinate data included in the selecting area is sequentially read from the area-based map coordinate data storage unit 16. It is output to the extraction means 14.

Then, in the extracting means 14, the selecting means 1
It is determined whether the map coordinate data received from 3 is within the drawing request range, and only when the map coordinate data is within the drawing request range, the map coordinate data is stored in the display map coordinate data storage unit 17 as the display map coordinate data and the screen is further displayed. The display map coordinate data is mapped by the output means 15 to screen coordinates for display, output to the display unit 3, and displayed on the display unit 3.

According to the map coordinate data extraction method and the map information drawing apparatus of this embodiment, the sorting means 12 sorts all the map coordinate data into a plurality of areas and stores them in the area-by-area map coordinate data storage section 16, and the sorting means. 13 selects a selection area that includes the drawing request range, extraction means 14 extracts display map coordinate data from the map coordinate data in the selection area, and screen output means 15 maps it to screen coordinates and displays it on the display unit 3. Since it is displayed, the map coordinate data for display can be extracted in the processing time proportional to the size of the drawing request range in the partial display, and as a result, the map information can be displayed efficiently. .

[0031]

According to the invention described in claim 1, all map coordinate data is divided into a plurality of areas, and an area including the drawing request range is specified as a selection area with respect to the drawing request range. The map coordinate data extraction method that determines whether each map coordinate data in the drawing is within the drawing request range, extracts the map coordinate data within the drawing request range, and displays based on the extracted map coordinate data. In the display, the map coordinate data for display can be extracted in a processing time proportional to the size of the drawing request range, and as a result, the map information can be efficiently displayed.

According to the second aspect of the present invention, the reading unit of the processing unit reads all the map coordinate data from the storage unit, and the sorting unit sorts the entire map coordinate data into a plurality of areas and the map coordinate data by area. Stored in the storage unit, the sorting means
According to the designation of the drawing request range from the input unit, an area including the drawing request range is specified as a selection area, each map coordinate data in the selection area is output, and the extraction means outputs the output map coordinate data to the drawing request range. It is determined whether or not it is within the range, the map coordinate data within the range is extracted and stored in the display map coordinate data storage unit, and the screen output means displays it based on the map coordinate data in the display map coordinate data storage unit. Since it is a map information drawing device that outputs screens to the screen, it is possible to extract map coordinate data for display in a processing time proportional to the size of the drawing request range in partial display, and as a result, display map information efficiently. There is an effect that can be done.

[Brief description of drawings]

FIG. 1 is a configuration block diagram of a map information drawing apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing the concept of a sorting means of the map information drawing apparatus of this embodiment.

FIG. 3 is an explanatory diagram showing a configuration of an area-based map coordinate data storage unit of the map information drawing apparatus according to the present embodiment.

FIG. 4 is an explanatory diagram showing the concept of a selecting means of the map information drawing apparatus of this embodiment.

FIG. 5 is an explanatory diagram showing the concept of extraction means of the map information drawing apparatus of this embodiment.

FIG. 6 is a configuration block diagram of a conventional map information drawing device.

FIG. 7 is an explanatory diagram showing the concept of a map coordinate data extraction method in a conventional map information drawing device.

[Explanation of symbols]

1, 1 '... processing unit, 2 ... storage unit, 3 ... display unit, 4
... input section, 11 ... reading means, 12 ... sorting means, 1
3 ... Selection means, 14, 14 '... Extraction means, 15 ... Screen output means, 16 ... Area-based map coordinate data storage section,
17 ... Display map coordinate data storage unit

Claims (2)

[Claims] 1. When all map coordinate data is divided into a plurality of areas and a drawing request range is designated, an area including the drawing request range is specified as a selection area and each map coordinate data in the selection area is specified. A map coordinate data extraction method comprising: determining whether or not it is within the drawing request range, extracting map coordinate data within the drawing request range, and displaying based on the extracted map coordinate data. 2. A storage unit for storing all map coordinate data,
An input unit for designating a drawing request range, a display unit for displaying map coordinate data within the drawing request range, the entire map coordinate data is read from the storage unit, and in accordance with the designation of the drawing request range from the input unit. In a map information drawing device having a processing unit for outputting map coordinate data within a drawing request range to the display unit, the processing unit reads all map coordinate data from the storage unit, and the reading unit reads the map coordinate data. Sorting means for sorting the entire map coordinate data that has been sorted into a plurality of areas, an area-based map coordinate data storage portion for storing the map coordinate data sorted by the sorting means for each area, and a drawing request range from the input portion. By designating, specify the area that includes the drawing request range as the selection area,
Selection means for outputting each map coordinate data in the selection area, and determination as to whether the map coordinate data output from the selection means is within the drawing request range, and extract map coordinate data within the drawing request range Extracting means, a display map coordinate data storage section for storing the map coordinate data extracted from the extracting means, and a screen for outputting a screen to the display section based on the map coordinate data in the display map coordinate data storage section. A map information drawing device comprising: an output unit.