JP3403679B2 - Geographic information system and its program recording medium - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geographic information system and a program recording medium therefor, and in particular, each time a map area selected by an input section is identified based on an attribute and displayed on a display section. The present invention relates to a geographic information system and a program recording medium for displaying a legend list including legend items that represent identifications based on the attributes.

[0002]

2. Description of the Related Art Generally, a geographic information system has a storage unit having a map file storing map information of various places, a display unit for displaying a selected map region, and a map region displayed on the display unit by a manual operation. And a storage unit, a display unit, and a control unit connected to the input unit. The control unit reads out selected area map information corresponding to the map area selected by the input unit from the storage unit. The read selected area map information is converted into display information suitable for display and supplied to the display section to display the map area selected on the display section.

In this case, the map area displayed on the display unit is mainly composed of a combination of various attributes, and in addition to this, identification data for identifying various attributes, for example, data of attribute color coding or pattern classification. In addition, a mark on the map consisting of unique symbols and marks is added to various attributes. And
Regarding identification data for identifying various attributes and various marks on the map, when the selected map area is displayed on the display unit, the meaning of each attribute part or mark is clarified. , A legend list showing a list of legend items consisting of each identification data and a character string showing its meaning, and each mark and a character string showing its meaning are also displayed.

By the way, a known geographical information system displaying a list of legends together (hereinafter referred to as a known legend displaying geographical information system) is not limited to a map file in which map information of various places is stored in a storage unit. Is equipped with a legend item file that stores identification data for identifying all the map attributes required for the entire map information, and is stored when the map area selected by the input section is displayed on the display section. The selected area map information corresponding to the selected map area and the identification data from the legend item file, respectively, and supplies the read selected area map information and the identified data to the display section to select the selected map area and It is displayed together with the legend list.

Here, FIG. 6 is an explanatory view showing an example of the display contents of the map area and the legend list displayed on the display screen of the display section in the known legend display geographical information system.

[0006] As shown in FIG. 6, map area according to the display contents of the forest 61 identified by the green color attribute in the top of the screen, and upland 62 identified by brown attributes in the middle region on the left side of the screen, Paddy field 63 in which the attribute is identified by blue in the lower area on the left side of the screen, and other area 64 in which the attribute is not identified by non-coloring
It consists of Further, the legend list 65 is shown from the middle area to the lower area on the right side of the screen, and all the legend items required for the entire map are displayed as the legend items therein. In this case, in the legend list 65 according to this example, blue means a paddy field, green means a forest, brown means a field, yellow means a weed, white rhombus marks mean an amusement park, and black square marks mean a golf course. Explanatory text is attached.

[0007]

In the known legend display geographical information system, when the map area selected in the display unit is displayed, the entire map is displayed regardless of the types of attributes forming the selected map area. Since the legend list 65 showing all the legend items required in the above is also displayed together, various attributes of the selected map area currently displayed in the display section are included in the legend list 65. In addition to displaying the legend items that identify and display the mark on the map,
The legend items for displaying other attributes of the selected map area that are not currently displayed on the display unit and displaying other marks on the map are also displayed. Then, when the selected map area is displayed, such a legend list 65 is always displayed.
When is displayed, the display of the legend list 65 may hinder the display of the selected map area depending on the display content of the selected map area.

As described above, in the known legend display geographical information system, the legend list 65 showing all the legend items is constantly displayed, so that the map display is simple and clear as a whole. In some cases, a part of the selected map area may be hidden by displaying the relatively large legend list 65.

The present invention has been made in view of the above technical background, and an object thereof is to display only a legend item in which various attributes of the map area are identified and displayed when the selected map area is displayed. Is also provided as a legend list, and a geographical information system in which the contents displayed in the legend list are minimized and a program recording medium for operating this system are provided.

[0010]

In order to achieve the above object, a geographical information system according to the present invention comprises a map file storing map information of various places and a legend item file storing identification data for identifying attributes on the map. A storage unit having
An information control unit that integrally controls each unit, a display control unit that converts input information into display information, a control unit that has a file management unit that inputs and outputs information to and from the storage unit, and a display unit that displays the display information, An input section for selecting a map area by manual operation is provided, and the control section reads out the selected area map information and identification data corresponding to the map area selected by the input section from the storage section, and reads out the selected area map information and identification data. Is displayed in the display unit together with a legend list consisting of each legend item representing identification data, and the control unit is provided with a legend item management table for setting whether or not to display each legend item.
Each selectively read area map information and identification data from the storage unit, the read select regions in the legend item management table
Only the legend items representing the identification data in the map information are set to be displayable, the read selected area map information and identification data are displayed on the display unit, and the legend list consisting of the legend items set to be displayable is displayed on the display unit. In the first configuration, the display is also performed.

In one specific example of the first configuration, the control unit, when the map area is continuously selected by the input unit and the display screen of the display unit is scrolled, until the scroll is completed. The legend items in the legend list displayed on the display unit are not updated.

In order to achieve the above-mentioned object, the program recording medium according to the present invention is a program recording a program for controlling the operation of a control unit for realizing the geographical information system of the first configuration, The program is an operation of generating the selected area map information corresponding to the operation of the input unit, an operation of reading the selected area map information corresponding to the map area information and the identification data from the storage unit, and a legend information management table based on the read identification data. Selected area read out in
The operation of setting only the legend items representing the identification data in the figure information to be displayable, the read selected area map information and identification data and the legend items set to be displayable are supplied to the display unit and selected. And a second list for executing the operation of displaying the map area and its identification together with the legend list including the legend items set to be displayable.

According to the geographic information system according to the first configuration and the program recording medium according to the second configuration, the legend item for which the display permission / inhibition of each legend item is set in the control unit is controlled by the control unit. When a management table is provided and the map area selected in the input section is displayed together with the legend list in the display section, the legend items are displayed to identify the various attributes of the selected map area displayed in the display section. Only the displayable area is set and the selected legend item is supplied to the display unit together with the selected area map information. Therefore, the display unit displays the identification of various attributes that make up the selected map area, In addition to that, a legend list with the minimum required legend items for the attributes of the displayed map area is displayed, and the map area can be displayed in a concise and clear state as a whole. Moreover, the rate at which part of the map area in the display is hidden by the display of the list legend is reduced.

In the geographic information system according to the first configuration, the display screen of the display unit is scrolled by continuously selecting the map area with the input unit under the control of the control unit. At this time, if the legend items displayed on the display unit are not updated until the scrolling is completed, the map drawing speed can be increased accordingly.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a geographical system according to the present invention.

In FIG. 1, 1 is a control unit, 2 is a storage unit,
3 is a display unit, 4 is an input unit, 5 is a file management unit, 6 is an information control unit, 7 is a display control unit, 8 is a legend item management table, 9 is a map file, and 10 is a legend item file. In this case, the control unit 1 includes a file management unit 5, an information control unit 6, a display control unit 7, and a legend item management table 8, and the storage unit 2 includes a map file 9 and a legend item file 10. .

The file management section 5 is connected to the storage section 2 and also to the information control section 6, and, under the control of the information control section 6, when the file management section 5 is connected to the storage section 2, the file management section 5 stores information from the storage section 2. Read or write information in the storage unit 2. The information control unit 6 is connected to the input unit 4 and comprehensively controls the file management unit 5, the display control unit 7, and the legend item management table 8 according to a built-in program. Display control unit 7
Is connected to the display unit 3 as well as to the information control unit 6, and under the control of the information control unit 6, converts various information supplied from the information control unit 6 into display information suitable for display. The legend item management table 8 is connected to the information control unit 6 and, under the control of the information control unit 6, based on the selection area map information and the identification data supplied from the information control unit 6 to the display control unit 7, for each legend item. Set whether to display in.

The map file 9 stores map information of various places obtained by combining various attributes,
The legend item file 10 stores identification data for identifying various attributes forming the map information together with the legend items. The display unit 3 displays the display information supplied from the display control unit 7 on a display screen (not shown) as a map area or a legend list. The input unit 4 can be manually operated with a mouse or the like, and selectively changes the map area displayed on the display screen of the display unit 3 by an operation.

FIG. 2 is an explanatory diagram showing an example of a data storage state in the legend item management table 8 used in the geographic information system shown in FIG.

As shown in FIG. 2, in the legend item management table 8, the first to Nth (plural) legend item data are stored in different data areas, and are stored in the first area. The number of legend items, N in this example, is stored, the first legend item data is in the next area, the second legend item data is in the next area, and the third legend item is in the next area. Data, ... The Nth legend item data is stored in the last area. The first legend item data is composed of an item type column A1, a legend type column A2, a legend pattern column A3, a display propriety setting column A4, and an explanatory character string column A5. Although not shown in FIG. 2, the second legend item data, the third legend item data, ..., And the Nth legend item data are also shown in the item type column A1 as in the first legend item data. , A legend type column A2, a legend pattern column A3, a display propriety setting column A4, and an explanation character string column A5.

In this case, the item type in the item type column A1 indicates the content represented by the corresponding attribute, such as upland, paddy field, forest, etc., and the legend type in the legend type column A2 is the type of attribute identification. For example, it represents a color code, a pattern, a mark, or the like. The legend pattern in the legend pattern column A3 is the specific content of the type of attribute identification, for example, green, brown, blue, etc. in the case of color coding, vertical stripes, horizontal stripes, small circles, etc. in the case of patterns, and the mark , For example, a double circle or a diamond. The display enable / disable setting in the display enable / disable setting field A4 is performed when the legend item is displayed.
For example, flag 1 is set when display is possible, and flag 0 is set when display is not possible. The explanation character string in the explanation character string column A5 is a character string representing the contents of the legend item, such as a field, a paddy field, and a forest.

Here, the operation of the geographic system according to the present embodiment will be schematically described as follows.

When the user manually operates the input unit 4 to select the map area to be displayed on the display unit 3, the map area selection information generated by the operation is supplied to the information control unit 6. Based on the supplied map area selection information, the information control unit 6 reads the selected area map information corresponding to the map area selection information from the map file 9 of the storage unit 2 through the file management unit 5, and at the same time, the legend item file. The identification data related to the map area selection information is read out from 10,
The read selected area map information and identification data are received through the file management unit 5. At this time, the information control unit 6
Supplies the received selected area map information to the display control unit 7, searches the received selected area map information and identification data, and selects from among various attributes constituting the selected map area displayed on the display unit. Then, the display permission / inhibition setting field A4 for the legend item data of the legend item management table 8 corresponding to the attribute for which the identification display is performed is set to be displayable, and the legend item data set to be displayable is used as the identification data as the display control unit 7
Supply to. Next, the display control unit 7 converts the selected area map information and the identification data supplied under the control of the information control unit 6 into display information suitable for display, and supplies the display information to the display unit 3. The display unit 3 displays the map area selected on the display screen based on the supplied display information by various attributes and their identification display, and also has a legend containing only the legend items for which the attribute identification display is performed. Display the list together.

FIG. 3 is an explanatory diagram showing an example of the display contents of the selected map area and the legend list displayed on the display screen of the display unit 3 in the geographic system shown in FIG.

As shown in FIG. 3, the map area relating to this display content is a forest 11 whose attribute is identified by green in the upper part of the display screen, and a field 12 whose attribute is identified by brown in the middle area on the left side of the screen. Paddy field 13 whose attribute is identified by blue in the lower area on the left side of the screen
And an area 14 other than the area 14 whose attribute is not identified by no coloring. The state of identification display of the map area and attributes shown in FIG. 3 is exactly the same as the state of identification display of the map area and attributes related to the display contents of the known legend display geographical information system shown in FIG. 6 described above. is there. Further, the legend list 15 is shown in the lower area on the right side of the screen, and regarding the identification display of the attribute in the map area currently displayed as the legend item therein, only the legend items that need explanation are displayed. is doing. That is, the display state of the legend list 15 shown in FIG. 3 is different from the display state of the legend list 65 related to the display contents of the known legend display geographical information system shown in FIG. 6 described above. In this case, the legend list 1
In 5, an explanation is given that the paddy field is blue, the forest is green, and the field is brown.

After that, when the user wants to change the map area displayed on the display section 3, the input section 4 is manually operated again and the map area selection information is generated. On the display screen of the display unit 3, for the map area selected by the change, various attributes forming the map area and their identification display are performed, and at the same time, corresponding to these identification display. Only the legend items that need explanation are displayed together as the legend list 15.

Next, FIG. 4 is a flow chart showing a process of displaying a map area selected in the geographic system shown in FIG. 1 and identifying and displaying various attributes forming the map area. Further, FIG. 5 is a flowchart showing an operation history when displaying the legend list in the geographic system shown in FIG.

Therefore, with reference to the flowchart shown in FIG. 4, the operation history when displaying the selected map area and identifying and displaying various attributes forming the map area in the geographic system according to this embodiment will be described. It will be described in more detail.

First, in step S1, when the user operates the input section 4 to generate map area selection information, the information control section 6 reads the map area selection information from the storage section 2 through the file management section 5 based on the map area selection information. The selected area map information and identification data corresponding to the map area selection information are read out, and the read selected area map information and identification data are received through the file management unit 5. At this time, the information control unit 6 searches the received selected area map information and identification data and determines whether or not there is a map area to be displayed on the display screen of the display unit 3. Then, when it is determined that there is a map area to be displayed (Y), the process proceeds to the next step S2, while when it is determined that there is no map area to be displayed (N), the processing of this series of flowcharts ends.

Next, in step S2, the information control unit 6 supplies the selected area map information to the display unit 3, and the display unit 3
The selected map area is displayed on the display screen of.

Next, in step S3, the information control unit 6 determines whether or not there is an instruction to display a legend item on the display screen of the display unit 3 based on the read identification data. Then, when it is determined that there is an instruction to display the legend item (Y), the process proceeds to the next step S4, while when it is determined that there is no instruction to display the legend item (N), the process of the series of flowcharts is performed. To finish.

In step S4, the information control unit 6 determines whether the display image on the display screen of the display unit 3 is moving, that is, the image is being scrolled. And
When it is determined that the display screen is not scrolling the image (N), the process proceeds to the next step S5, while when it is determined that the display screen is scrolling the image (Y), the process of the series of flowcharts is ended. .

Subsequently, in step S5, the information control section 6 determines whether or not the identification display in the identification data is color-coded. When it is determined that the identification display is color-coded (Y), the process proceeds to the next step S6, while
When it is determined that the identification display is not color-coded (that is, the mark) (N), the process proceeds to another step S8.

Next, in step S6, the information control unit 6 performs coloring corresponding to the various attributes constituting the selected map area displayed on the display screen of the display unit 3 in accordance with the attributes. The identification is displayed.

Next, in step S7, the information control unit 6 can display the legend item data display permission / inhibition setting field A4 corresponding to the attribute in the legend item management table 8 which has been identified and displayed by coloring in step S6. Set to. After making this setting, return to step S1 and again
The operation after step S1 is repeatedly executed.

On the other hand, in step S8, the information control section 6 determines whether or not to display the legend item data corresponding to the mark on which the identification is displayed, based on the judgment that the identification is the mark in step S5. Set A4 to displayable.
After making this setting, the process returns to step S1 and the operations after step S1 are repeatedly executed again.

The process of displaying the legend list in the geographic system according to this embodiment will be described in more detail with reference to the flowchart shown in FIG.

First, in step S11, the information control unit 6 accesses the legend item management table 8 and determines whether or not the first legend item data is read from the legend item management table 8 as identification data. . Then, when it is determined that the identification data has been read (Y), the process proceeds to the next step S12, while when it is determined that the identification data has not been read (N), the processing of this series of flowcharts is performed. finish.

Next, in step S12, the information control section 6 determines whether or not the display propriety setting field A4 in the read identification data is set to be displayable. When it is determined that the display propriety setting field A4 is set to be displayable (Y), the process proceeds to the next step S13,
On the other hand, when it is determined that the display propriety setting field A4 is not set to be displayable (N), the process of the series of flowcharts is ended.

Next, in step S13, the information control section 6 uses the legend type column A in the read identification data.
It is determined whether or not the legend type of 2 is color-coded. If it is determined that the legend type is color-coded (Y), the process proceeds to the next step S14. On the other hand, if it is determined that the legend type is not color-coded (a mark) (N), another step S15 is performed. Transition.

Then, in step S14, the information control section 6 extracts the explanation character string corresponding to the color of the color judged in step S13 from the explanation character string column A5 in the read identification data, and the color and its explanation. The character string is displayed as the display content of the legend first column 15. After performing this display, the process returns to step S11, and the operations after step S11 are repeatedly executed again.

On the other hand, in step S15, the information control section 6 extracts the explanation character string corresponding to the mark judged in step S13 from the explanation character string column A5 in the read identification data, The mark and its description character string are displayed as the display contents of the legend first column 15. After performing this display, the process returns to step S11, and again to step S11.
The operations after 11 are repeatedly executed.

Each of the flowcharts shown in FIGS. 4 and 5 is usually carried out by using an operation program stored in a recording medium such as a CD-ROM.

In each of the above explanations, the case where the identification display for various attributes is color-coded has been described.
The identification display according to the present invention is not limited to the case of color classification, and may be a pattern of vertical stripes, horizontal stripes, diagonal stripes, small circles, or the like, or a combination of color classification and patterns.

When the map area displayed on the input unit 4 is continuously selected and changed and the display screen of the display unit 3 is moving, that is, when image scrolling is being performed, the image scrolling is ended. Up to this point, if the legend items in the legend list 15 displayed on the display image of the display unit 3 in the information control unit 6 are not updated, the control operation of the information control unit 6 is exclusively performed to form the display image. It can be spent, and the drawing speed of the display image can be increased.

[0047]

As described above, according to the present invention, by the control of the control unit, the legend item management table in which the displayability of each legend item is set is provided in the control unit, and the map selected by the input unit is provided. When the area is displayed with the list of legends in the display section, only the legend items for which various attributes of the selected map area displayed in the display section are displayed are set to be displayable, and the selected legend is displayed. Since the items are supplied to the display unit together with the selected area map information, the display unit displays the identification of the various attributes that make up the selected map area, and also the minimum required attribute of the displayed map area. The legend list that consists of the legend items is displayed, and the map area can be displayed in a concise and clear state as a whole, and a part of the displayed map area can be displayed in the legend list. Yo Ratio to be concealed Te is an effect that decreases.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a geographical system according to the present invention.

2 is an explanatory diagram showing an example of a data storage state in a legend item management table used in the geographic information system shown in FIG. 1. FIG.

FIG. 3 is an explanatory diagram showing an example of display contents of a selected map area and a legend list displayed on the display screen of the display unit in the geographic system shown in FIG.

FIG. 4 is a flowchart showing an operation process when displaying a map area selected in the geographic system shown in FIG. 1 and identifying and displaying various attributes forming the map area.

5 is a flow chart showing an operation history when displaying a legend list in the geographic system shown in FIG. 1. FIG.

FIG. 6 is an explanatory diagram showing an example of display contents of a map area and a legend list displayed on a display screen of a display unit in a known legend display geographical information system.

[Explanation of symbols]

1 control unit 2 memory 3 Display 4 Input section 5 File management department 6 Information control unit 7 Display control section 8 Legend item management table 9 map files 10 Legend item file 11 forest 12 fields 13 paddy fields 14 Other areas 15 Legend list A1 item type column A2 Legend type column A3 Legend pattern column A4 display propriety setting column A5 Description character string column

Claims (4)

(57) [Claims] 1. A map file storing map information of each region, a storage section having a legend item file storing identification data for identifying attributes on a map, an information control section for integrally controlling each section, and display information for input information. Display control unit to convert to
The control unit includes a control unit having a file management unit that inputs and outputs information to and from the storage unit, a display unit that displays the display information, and an input unit that selects a map area by a manual operation, and the control unit includes: The selected area map information and identification data corresponding to the map area selected by the input unit are read from the storage unit, and the read selected area map information and identification data are displayed together with a legend list including legend items representing the identification data. In a geographical information system displayed by a unit, the control unit is provided with a legend item management table for setting display availability for each legend item, and the control unit reads the selected area map information and identification data from the storage unit every time. , The read selected area map information in the legend item management table
Only the legend items representing the identification data within the display are set to be displayable, the read selected area map information and the identification data are displayed on the display unit, and the legend list consisting of the respective legend items set to the displayable is set to the above. A geographical information system characterized by being displayed together on a display unit. 2. When the map area is continuously selected by the input section and the display screen of the display section is scrolled, the control section displays the map area on the display section until the scroll is completed. The geographical information system according to claim 1, wherein the legend items in the legend list are not updated. 3. The identification data is color data or pattern data representing a corresponding attribute and its character string data, and mark data representing a mark on a map and its character string data. The geographical information system according to Item 1. 4. A program recording medium for recording a program for controlling the operation of the control unit for realizing the geographical information system according to claim 1, wherein the program corresponds to an operation of the input unit. Operation of generating selected area map information, operation of reading selected area map information and identification data corresponding to the map area information from the storage unit, the read selection in the legend information management table based on the read identification data operation for setting only the legend item representing identification data in the region map information displayable, and a legend items set the a read selection area map information and identification data to said displayable supplied to the display unit, the The operation of displaying the map area selected on the display unit and its identification together with the legend list including the legend items set to be displayable is executed. A program recording medium characterized by being executed.