JP2002297641A - Storing method, updating method, and display method for map data, and software - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it easy to confirm an update history and confirm information with time on land uses by enabling updating operation to be quit halfway and registering update data of maps by holding difference data obtained through difference extraction processing by technology which updates maps by analyzing image data of aerial photographs by using map information and extracting secular changes, etc. SOLUTION: Map image data of the latest satellite image, an aerial photograph, etc., are superposed and displayed on map graphic data inputted to a computer and difference data are automatically extracted. The extracted difference data are saved. Then the difference data are superposed and displayed again on the map graphical data and map updating processing is carried on. When the map graphical data are updated, the update data are saved together with information regarding the update period. Then update data to be displayed are selected from the update data and superposed and displayed on the map graphic data. Consequently, which part has been updated can easily be confirmed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-registered map data and differential data obtained by analyzing the latest satellite image or aerial photograph, and a method of storing map data updated based on the differential data. , Update method, and display method.

[0002]

2. Description of the Related Art Conventionally, as a technique for analyzing image data such as aerial photographs using pre-registered map information, extracting aging and the like, and updating a map, Japanese Patent Application Laid-Open Publication No.
Techniques described in JP-A-5-181411 and JP-A-09-101742 are known. According to these technologies, the difference data is extracted from the pre-registered data and the new image data by using the image processing technology, and the registered map data is updated based on the result. Can be done automatically or manually.

Further, as disclosed in Japanese Patent Application Laid-Open No. 09-061164, a system is known in which a difference is extracted using two aerial photographs having different photographing dates and times, and the result is visually checked to mark a changed part of the building. Have been.

[0004]

However, in the conventional method, when the update of the map is completed using the difference data, the update history (age information) is not stored. In Japanese Patent Application Laid-Open Nos. 05-181411 and 09-101742, the purpose is to automatically update a map, so that update data cannot be stored and used as aging information. Also, in JP-A-09-061164,
The change determination process is performed on the entire large image,
When the change determination process is stopped halfway, there is no description for saving the progress of the change determination process.

[0005] An object of the present invention is to make it possible to hold the difference data obtained by the difference extraction processing so that the update operation can be completed halfway.
By registering map update data, you can check the update history,
It is an object of the present invention to enable easy confirmation of land use aging information.

[0006]

In order to achieve the above object, an invention according to claim 1 is a method for storing map data, wherein map area data representing a map of a predetermined area and the area are photographed. It is characterized by comprising a step of superimposing image data and extracting difference data representing a difference between them, and a step of storing the extracted difference data.

According to a second aspect of the present invention, there is provided an updating method for updating map graphic data according to the storage method according to the first aspect, wherein the difference data is displayed by being superimposed on the display of the map graphic data. And accepting an update operation of the map graphic data based on the difference data on the superimposed and displayed map.

According to a third aspect of the present invention, in the method for storing map data according to the first aspect or the method for updating the map data according to the second aspect, the difference data is obtained by: It contains information indicating that the shape of the building has not changed, information indicating that the building has been deformed or disappeared, or information indicating that the building has been newly added. I do.

According to a fourth aspect of the present invention, in the method of updating map data according to the second aspect, the step of displaying the difference data is performed with a display attribute based on the difference data. The display with the display attribute based on the difference data is, for example, a display in which the line width or the display color is changed between an existing building, a rebuilt building, and a new building.

A fifth aspect of the present invention is the map data updating method according to the fourth aspect, further comprising a step of setting a display attribute of the difference data.

According to a sixth aspect of the present invention, in the map data updating method according to the second aspect, when the map graphic data is updated based on the difference data, the update data relating to the update relates to an update timing. The method further comprises a step of storing the information together with the information. The information about the update time may be the date and time of the update, or information such as the number of the update work and the number of the update work.

According to a seventh aspect of the present invention, there is provided a display method for displaying map data updated by the map data updating method according to the sixth aspect, wherein the update data to be displayed is selected from the stored update data. And displaying the selected update data in a manner superimposed on the display of the map graphic data.
The invention according to claim 8 is the method for displaying map data according to claim 7, wherein for each of the selected update data,
Setting the display attribute; and displaying the selected update data with the set display attribute.

According to a ninth aspect of the present invention, there is provided software for implementing the method for storing, updating, or displaying map data according to any one of the first to eighth aspects.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a system for performing a difference extraction result confirmation operation according to an embodiment of the present invention. This system includes a processing device 11, a memory 15, and a hard disk 16. The processing device 11 includes the attribute setting unit 1
11, an update processing unit 113, an update data registration unit 114, an extraction result registration unit 115, an update data display unit 116, and an extraction result display unit 117. 1
11 to 117 are realized by a software program. Therefore, the present system can be generally realized by a personal computer or a workstation. The processing device 11 has a display 1 for displaying images, graphics, dialog boxes, and the like.
2, and a keyboard 13 and a mouse 14 for the operator to perform various input operations in the system. The memory 15 includes an image storage unit 151, an extraction result table 152, and an update data table 153.
Are stored. The hard disk 16 has an image data storage file 161, a graphic data storage file 16
2, an extraction result storage file 163, an update data storage file 164, and the like. The contents of other components will be clarified in the following description.

FIG. 3 is a flowchart showing a processing procedure in the system of the present embodiment. As shown
Processing is performed in the order of extraction result attribute setting processing S1, difference extraction processing S2, map updating processing S3, and map registration processing S4.

FIG. 4 shows the extraction result attribute setting process S1 of FIG.
It is a figure which shows the dialog box displayed by. The extraction result attribute setting process S1 is performed by the attribute setting unit 1 of the processing device 11.
11 is a process for setting a display color and a line width when displaying the extraction result on the display 12. Thereby, the extraction results are visually distinguished and easy to see. The setting is a building 31 determined to be an existing building, a building 32 determined to be removed or rebuilt, and a building 3 determined to be new.
3 for three. As will be described later, the setting of the updated building 34 to be displayed when the map graphic data is updated based on the extraction result is also performed at the same time.

A line width setting combo box 35 provided for each of the buildings 31 to 34 is a column for setting the line width of a figure representing the extraction result. In addition, each building 31-
When the color change button 36 is clicked corresponding to 34,
A color setting dialog is displayed, and the display color of the figure representing the extraction result can be set. When the color is set, the display color is displayed in the set color display edit box 37. When the standard value button 38 is clicked, a standard value prepared in advance by the system is set.

In the present embodiment, the color of the existing building is "yellow", the color of the removed and rebuilt building is "red", the color of the new building is "blue",
Although the updated building color is set to “green” and the line widths are all set to “1”, the state may be identified by other colors and line widths. When the OK button 39 is clicked, the designated extraction result display attribute is set. Clicking the cancel button 3A cancels the setting.

FIG. 5 is a diagram showing a processing procedure of the difference extraction processing S2 of FIG. The difference extraction processing S2 is performed by the processing device 11
Is performed by the difference extracting unit 112. First, in the image input process (step S20), the image storage unit 15 of the memory 15 is used.
1 and the hard disk 16
The map graphic data of the graphic data storage file 162 in the table is input. Positioning is performed so that the same point of the map image data and the map graphic data (vector data) overlaps (step S21), and an area for extracting the difference is designated to extract the difference data between the map image data and the map graphic data ( Step S22), and store the extracted difference data in the memory 1
5 in the extraction result table 152 (step S2).
3). Here, as a technique for aligning the map image data and the map graphic data in step S21, a known image processing technique or the like may be used. Also, a known difference extraction technique may be used for the difference extraction processing in step S22.

FIG. 2 shows an extraction result table 1 in the memory 15.
52 shows the contents of 52. In the extraction result table 152, the extraction result records 21 are stored as an array by the number of the extracted difference data. The original figure number 211 stores the figure number of the map figure data stored in the figure data storage file 162 of the hard disk 16.
The figure number is an index assigned to each map figure data. The result flag 212 stores the difference data extracted in step S23. In the present embodiment, a building determined to be an existing building is set to “10”, a building determined to be a removed / rebuilt building is set to “20”, and a building determined to be a new building is set to “30”. However, the state may be identified by other information. The update flag 213 stores the update information of the map graphic data. In the present embodiment, when the map graphic data is not updated (unprocessed state) “10”, when the update is performed but the map registration processing S4 is not yet performed (temporary processing state)
It is assumed that “20” is set and “30” is set when the map registration process S4 is performed (stored state).

Returning to FIG. 5, after setting the difference extraction result in the extraction result table 152 in step S23, the extracted difference data is stored in the result flag 212 of the detection result record 21 and the extraction result attribute setting process in step S24. S1
Is displayed on the display in a manner superimposed on the map graphic data in accordance with each set value set in. This display process is performed by the extraction result display unit 117 of the processing device 11.

Next, the map update processing S3 in FIG. 3 will be described in detail. In the above difference extraction processing S2, the existing building "1"
There is no need to modify the buildings determined to be "0",
For a building determined to be a removed / rebuilt building “20” or a building determined to be a new building “30”, the map graphic data is updated. The map update processing S3 is performed by the update processing unit 113.

FIG. 6 is a flowchart showing a processing procedure of the map update processing S3. First, in the map update processing S3,
A map update panel as shown in FIG. 7 is displayed, and the user is allowed to select what kind of update processing is to be performed (step S3).
0).

In the map update panel shown in FIG.
The three buttons 41 to 43 below the label are buttons that are clicked when drawing a new building. In this embodiment, a rectangle plotting button 41 for plotting a rectangle and a tilted rectangle plotting button 4 for plotting a tilted rectangle
2, and a multi-point designation drawing button 43 for drawing by multi-point designation is prepared. Other drawing methods may be prepared as buttons. Similarly, below the “Removal / Rebuilding” label, there are three buttons that are clicked when renewing the rebuilding / rebuilding building. To draw the updated building, use rectangles like buttons 41-43.
A tilted rectangle and buttons for specifying multiple points are provided.

Returning to FIG. 6, in step S30, the user presses the three buttons 4 under the "new construction" label on the map update panel.
When any one of 1 to 43 is clicked, it is determined that a new building is to be constructed, and the process proceeds to step S31. When the user clicks any one of the three buttons under the label "Removal / Rebuild" on the map update panel, it is determined that the update for removing or rebuilding the building is performed, and the process proceeds to step S33.

In the case of drawing a new building, a building figure is drawn on the map figure data (step S31). The constituent points constituting the drawn building graphic and the number of the constituent points are stored in the update data table 153 of the memory 15 (step S32), and the process proceeds to step S3A.

In the case of updating a figure of a building that has been removed or rebuilt, a figure whose shape is to be deleted or updated (a figure of a building that has been removed or rebuilt) is selected on the map with the mouse ( Step S33). Next, it is determined whether or not the selected figure is a figure on which the difference extraction processing S2 of FIG. 3 has been performed (steps S34 and S35). If the figure is a corresponding figure, the constituent points of the selected figure and the number of the constituent points are stored in the update data table 153 of the memory 15 (step S36). If the selected graphic is not the graphic on which the difference extraction processing S2 in FIG. 3 has been performed, the processing ends as it is as a selection error.

Next, the selected figure is deleted, and if it is determined that the figure is to be removed, the next processing is performed as it is, and if it is determined that the building is to be replaced, a new building figure is drawn (step S37). Then, the original graphic number 2 of the extraction result record 21 storing the graphic number of the selected graphic is stored.
11 is updated (step S38). Here, when the removal is determined, the original graphic number 211 is initialized,
When a new building is drawn, the figure number of the figure is stored in the original figure number 211. Further, the update flag 213 of the extraction result record 21 is set to the unprocessed state “10”.
To a temporary processing state "20" (step S39). At the same time, the extraction result displayed in the removed / rebuilt building result display attribute 32 is changed to the updated building result display attribute 34 and displayed again so that the user can visually recognize that the map update processing has been performed. .

After steps S32 and S39, the update data table 153 is updated (step S3A).
This is because when the new construction process is performed, the update process flag 511 of the update data table 153 is set to the new construction process “10”, and when the removal / rebuild process is performed, the update process flag 511 is set to the removal / rebuild process “ 20 ". When a new graphic is drawn, the mesh number 512 of the update data table 153 where the graphic is located is registered.

In this embodiment, the coordinate values constituting the figure are not stored in the extraction result record 21 on the memory, but are obtained from the figure data storage file 162 using the registration number (graphic number) as a key. However, the coordinate values may be stored in a memory in advance and used.

FIG. 8 shows the contents of the update data table 153 of the memory 15. The update data table 153 has a certain amount of memory area. An update data record 51 is created each time a map update process is performed on the memory area. The update process flag 511 stores information for specifying the map update process that has been performed. In the present embodiment, “10” is set for the new construction process and “20” is set for the removal / rebuilding process. However, the status may be identified by other information, or the status may be further classified. You may. Next, the mesh number 512 stores the mesh number in which the graphic data exists. The mesh number is a number managed by the graphic data storage file 162 by dividing the entire map drawing into meshes, and can be represented by coordinates (X, Y). The result graphic composing point number 513 is the number of vertices of the building graphic, and the result graphic composing point 514.
Represents a vertex of a building figure. Result graphic constituent point 51
Reference numeral 4 denotes an array, which exists as many as the number registered in the resultant graphic configuration points 513. One element of the result graphic composing point 514 is information such as coordinates of one composing point.

FIG. 9 is a diagram showing a processing procedure of the map registration processing S4 of FIG. The map registration process S4 is started when the map registration button 44 on the map update panel in FIG. 7 is clicked. The map registration process S4 is performed by the update data registration unit 114 and the extraction result registration unit 115 of the processing device 11.

First, it is determined whether or not to register the map graphic data updated in step S3A of FIG. 6 (step S40). When registering, the updated map graphic data is written into the graphic data storage file 162 (step S41). Further, the flag in the temporary processing state “20” in the update flag 213 of the extraction result record 21 corresponding to the map graphic data is rewritten to the stored state “30” (step S41). If not registered, the update flag 213 of the extraction result record 21 is set to the unprocessed state “1”.
"0" (step S42), and the process proceeds to step S45.

After step S41, it is determined whether to register the update data table 153 (step S4).
3). When registering, the update data table 153 of the memory 15 is registered in the update data storage file 164 (step S44). If not registered, step S4
Go to 5. The update data table 153 is registered separately for a figure subjected to a new construction process and a figure subjected to a removal / rebuilding process, and a data name created by a single registration operation can be arbitrarily set. Saved in.

Next, it is determined whether or not to register the extraction result table 152 (step S45). When registering, the extraction result table 152 of the memory 15 is registered in the extraction result storage file 163 (step S46). If not registered, the process ends. The extraction result storage file 163 is displayed again when the extraction result display button 45 on the map update panel in FIG. 7 is clicked. As a result, when the map graphic data update process is terminated halfway,
The progress of the update process can be confirmed.

In step S44, the update data table 153 can be stored with an arbitrary name. Therefore, the update information of the map data can be managed in the same state as the file management. At the time of registration, a series of update work may be registered so that it can be known on what day and how many times the update work has been performed. Even if the graphic update processing (S3) is performed, no update data (file) is created unless the registration processing (S4) is performed.

FIG. 10 shows an update result log list. The update result log list is a dialog box displayed when the log display button 46 on the map update panel in FIG. 7 is clicked. Using this dialog box, map update data arranged in time series (the map update data is an update data record of the update data table 153 stored in the update data storage file 164) is stored in the graphic data storage file. 162 can be superimposed and displayed. The map update data is displayed as a tree view like 61. As shown at 62, a check box is checked for the map update data to be superimposed and displayed with the map graphic data. When the OK button 63 is clicked after the selection of the map update data to be superimposed on the map graphic data is completed, a dialog box shown in FIG. 11 is displayed. When the cancel button 64 is clicked, the map update data is not displayed.

In the update data table 153 stored in the update data storage file 164, the update work of the update data table 153 is performed according to the date of the update work and the number of the work Or have the information. Therefore, by arranging and displaying the information in the order of the information, the display as shown in FIG. 10 is possible.

The check boxes in FIG. 10 (for example, check boxes for “removal / rebuilding” and “new construction”) correspond to a plurality of updated graphics. One update result data stores "a figure updated from the previous registration to the current registration".

FIG. 11 is a dialog box for setting the display attribute of the map update data selected in the dialog box of FIG. Reference numeral 71 denotes a view for displaying a list of map update data checked in the dialog box of FIG. The map update data is arbitrarily selected from this list, and the display attribute for superimposed display with the map graphic data is set. With the combo box 72, the line width of the display graphic can be specified. By clicking the color change button 73, a color setting dialog box is displayed, and the color of the display figure can be arbitrarily set. The color set in the color setting dialog box is displayed in a set color display edit box 74.
After setting for all map update data,
When the K button 75 is clicked, map update data is displayed on the update data display section 116 of the processing device 11. When the cancel button 76 is clicked, the setting of the display attribute is canceled.

According to the above embodiment, the extraction result table 152 shown in FIG. 2, which is the difference data obtained by comparing the map graphic data and the map image data, can be stored in the extraction result storage file 163. Update flag 213 of each extraction result record 21 of extraction result table 152
, The progress of the update process can be known, so that even if the update process is interrupted, it can be easily resumed. That is, the extraction result table 152 may be read from the extraction result storage file 163, and the process may be restarted from step S24 in FIG. By clicking the extraction result display button 45 in FIG. 7, the contents of the extraction result storage file 163 are displayed again, so that the map data updating process can be restarted even if it is terminated halfway.

According to the above embodiment, the update data table 153 shown in FIG.
4 and the update data specified on the screen of FIG. 10 can be displayed on the map with the display attribute specified on the screen of FIG. 11, so that the user can obtain the aging information indicating when and where the data was updated on the map. Can be easily confirmed.

[0044]

As described above, according to the present invention,
Image data such as the latest satellite image or aerial photograph is superimposed and displayed on the vector map graphic data input to the computer, and the difference data is automatically extracted and saved, so the map update work is being performed. It will be possible to interrupt. Further, since the map update data is stored, it is possible to easily confirm the aging information. Since the display of the difference data or the display of the update data is performed with the display attribute corresponding to the data, it is possible to easily grasp visually what kind of difference has been detected or when it has been updated.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a system for performing a difference extraction result confirmation operation according to an embodiment;

FIG. 2 shows the contents of an extraction result table.

FIG. 3 is a diagram showing a processing procedure in the system according to the embodiment;

FIG. 4 is a diagram showing a dialog box displayed in an extraction result attribute setting process.

FIG. 5 is a flowchart illustrating a processing procedure of a difference extraction process.

FIG. 6 is a flowchart illustrating a processing procedure of a map updating process.

FIG. 7 is a diagram showing a display screen of a map update panel.

FIG. 8 is a diagram showing contents of an update data table;

FIG. 9 is a flowchart showing a processing procedure of map registration processing.

FIG. 10 is a diagram showing a dialog box of an update result log list.

FIG. 11 is a diagram showing a dialog box for setting display attributes of map update data.

[Explanation of symbols]

11 processing device, 111 attribute setting unit, 112 difference extraction unit, 113 update processing unit, 114 update data registration unit, 115 extraction result registration unit, 116 update data display unit, 117 extraction result display unit , 12 ... display, 1
3 ... keyboard, 14 ... mouse, 15 ... memory, 151
... Image storage unit, 152 ... Extraction result table, 153 ... Update data table, 16 ... Hard disk, 161 ... Image data storage file, 162 ... Graphic data storage file, 163 ... Extraction result storage file, 164 ... Update data storage file, 21 ... Extraction result record, 211 ... Original figure number, 212 ... Result flag, 213 ... Update flag, 31 ... Existing building result display attribute, 32 ... Removed / replaced building result display attribute, 33 ... New building result display attribute, 34 ... Updated building result display attribute, 35: line width setting combo box, 36: color setting button, 37: setting color display edit box, 38: standard value button, 39: setting button, 3A: setting cancel button, 41: rectangle drawing button ..., 42... Inclined plotting button, 43. 44, a map registration button, 45, an extraction result display button, 46, a log display button, 51, an update data record, 511, an update processing flag, 512, a mesh number, 513, a result graphic configuration point, 514, a result graphic configuration point, 61… Extraction result log data tree view,
62: log data display designation check box, 63: setting button, 64: setting cancel button, 71: result display list view, 72: line width setting combo box, 73 ...
Color setting button 74, setting color display edit box
75 ... setting button, 76 ... setting cancel button.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09B 29/00 G09B 29/00 Z F term (Reference) 2C032 HB03 HB05 HB11 HC05 HC22 HC27 5B050 BA06 BA10 BA17 CA07 EA18 EA19 FA02 FA13 FA19 5B057 AA13 CA12 CB12 CC02 CE08 DA07 DA16 DB02 DC09 DC32 5B075 ND06 NK06 PP03 UU13

Claims (9)

[Claims] 1. A method for storing map data, comprising: superimposing map graphic data representing a map of a predetermined region with image data obtained by photographing the region, and extracting difference data representing a difference between the two. And storing the extracted difference data. 2. An updating method for updating map graphic data according to the storage method according to claim 1, wherein the step of superimposing the difference data on a display of the map graphic data and displaying the difference data; Receiving an update operation of the map graphic data based on the difference data on the combined map. 3. The method for storing map data according to claim 1 or the method for updating map data according to claim 2, wherein the difference data is such that the shape of the building represented by the map graphic data is changed. Information indicating that they have not
A method for storing or updating map data, characterized by including information indicating that the building has been deformed or disappeared, or information indicating that the building has been newly added. 4. The map data updating method according to claim 2, wherein the step of displaying the difference data includes displaying with a display attribute based on the difference data. 5. The map data updating method according to claim 4, further comprising a step of setting a display attribute of said difference data. 6. The method of updating map data according to claim 2, further comprising the step of: when updating the map graphic data based on the difference data, storing the update data relating to the update together with information on an update time. And a map data updating method, further comprising: 7. A display method for displaying map data updated by the method for updating map data according to claim 6, wherein: a step of selecting update data to be displayed from the stored update data; Displaying the updated data in a manner superimposed on the display of the map graphic data. 8. The method for displaying map data according to claim 7, wherein a display attribute is set for each of the selected update data, and the selected update data is displayed with the set display attribute. And a step of displaying map data. 9. Software for realizing the method for storing, updating or displaying map data according to claim 1. Description: