WO2007063610A1 - Map display system and map display program - Google Patents

Map display system and map display program Download PDF

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Publication number
WO2007063610A1
WO2007063610A1 PCT/JP2005/022590 JP2005022590W WO2007063610A1 WO 2007063610 A1 WO2007063610 A1 WO 2007063610A1 JP 2005022590 W JP2005022590 W JP 2005022590W WO 2007063610 A1 WO2007063610 A1 WO 2007063610A1
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WIPO (PCT)
Prior art keywords
map
displayed
scrolling
point
scroll
Prior art date
Application number
PCT/JP2005/022590
Other languages
French (fr)
Japanese (ja)
Inventor
Kazuaki Iwamura
Original Assignee
Hitachi, Ltd.
Hitachi Software Engineering Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Hitachi, Ltd., Hitachi Software Engineering Co., Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP2005/022590 priority Critical patent/WO2007063610A1/en
Publication of WO2007063610A1 publication Critical patent/WO2007063610A1/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00Navigation; Navigational instruments not provided for in preceding groups G01C1/00-G01C19/00

Abstract

A method where, when information on a place which is not currently displayed is searched, a viewpoint is moved along a route leading to that place (a route along a linear line or a structure such as a pipeline) and a reference place is displayed in an enlarged scale in combination with focus/defocus, facilitating display and understanding of target position. Furthermore, a method for eliminating the need for resetting the line-of-sight by shifting the display to the center without changing the direction of current line-of-sight is provided. In this method, when the target point of scroll is determined, a scroll scenario is created, and a function for scrolling the direction of line-of-sight and a function of horizontal scroll are effected according to the scroll scenario.

Description

Technical field of map display system and map display program

 The present invention relates to a method for indicating a geographic information system that manages long-distance structures such as pipelines, railways, rivers, and roads. Technical background

 Until now, navigation has been considered as a typical example of a scroll application using maps. For example, in Japanese Patent Laid-Open No. 9-81628, when moving to an adjacent facility, scrolling in the shortest distance direction is performed so that the adjacent facility comes to the center of the screen at a preset magnification. Japanese Patent Application Laid-Open No. 2003-240586 also scrolls sequentially to the guide point, changes the scale to adjust the scroll time, expands the display scale when the guide point is reached, and in some cases displays a 3D shape.

 Further, Japanese Patent Laid-Open No. 2004-341028 discloses navigation having a function of scrolling along a selected line and displaying the vehicle position so that it is at the center of the screen.

In the method described in the background art above, consideration for visibility from the start of scrolling to the final purpose display based on the user's search is not perfect. Specifically, when scrolling to the destination, the viewpoint switching in the vertical direction cannot be maintained and the viewpoint switches in the middle. Also, since it is always premised on scrolling a plane map, scrolling on a stereoscopic display that is viewed obliquely is not shown. According to the invention, when information on a place not currently displayed is searched, a viewpoint is moved along a route (a route along a structure such as a straight line distance or a pipeline), and further, In combination with the focus / defocus, the reference location is enlarged and displayed, making it easy to display and grasp the target location. It is another object of the present invention to provide a method for eliminating the need to reset the line of sight by moving the display to the center without changing the current line of sight. Disclosure of the invention

 A typical configuration of the present invention for solving the above problems is as follows.

A map display unit for displaying a map including a long-distance structure, a selection unit for receiving designation of a target point of a long-distance structure that is not displayed on the display means, and the map from the displayed point to the designated target point. A map system comprising: a focus scenario determination unit that generates a scroll scenario for scrolling a map; and a scroll execution unit that scrolls and displays a map according to the focus scenario. In particular, the scroll part gradually raises the altitude of the line-of-sight position from the displayed map, scrolls horizontally from the raised viewpoint to the target point, and at the point where the specified point becomes the center of the screen of the map display part. Move the viewpoint position closer to the target point until the zoom ratio before scrolling is reached. Brief Description of Drawings

FIG. 1 is a diagram showing a functional configuration of the focus display.

Fig. 2 shows the flow of focus display.

Figure 3 shows the algorithm flow for focus display. Fig. 4 shows the algorithm flow of focus display. Fig. 5 shows the algorithm flow for focus display. Figure 6 shows the calculation of the moving vector.

Figure 7 shows the configuration of the focus scenario. BEST MODE FOR CARRYING OUT THE INVENTION

 In the present application, the long-distance structure is linear graphic data described on a map, and is described by a broken line (polyline) described by a plurality of coordinates. A long-distance structure may have a width on a map, and specifically refers to a map figure representing a pipeline, road, or the like. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 This function can be implemented by a software program that is operated by a computer such as a personal computer or workstation, or can be realized by a cooperative operation with hardware. Further, it may be implemented by linking with a map database system connected via a network or the like without being constituted by a single computer.

 (Example 1)

In this embodiment, explanation will be made based on an embodiment related to facility management of a cross-country pipeline with a distance ranging from several hundred kilometers to several thousand kilometers. For structures such as pipelines where the distance is extremely long compared to their width, it is not possible to display all of them on a computer screen against a highly accurate map (large scale map). It is possible to display only a specific range. In particular, when searching and displaying information within a specific range, it may be necessary to search for information at a remote location that is not currently displayed. In this case, it is desirable to scroll to see a map of a distant place. Has occurred.

 (1) There is a possibility of losing sight of the facility that the user pays attention to while scrolling over long distances.

 (2) If the line of sight from the current location is interrupted when scrolling away, the relationship with the current location will not be understood.

 In the present application, a facility information display system having a location focus display function for solving such problems is shown. Figure 1 shows the functional configuration of the focus display function.

 Figure 1 consists of the following functional elements.

 (1) Map database 1 0 1

 A database that stores high-precision maps (large-scale maps) and low-precision wide-area maps (small-scale maps). These maps are managed in association with the coordinates of the four corners of each area. In addition, the entire facility shape data is managed as a unit of the map data as coordinate map data. Since this facility shape data is expressed as polyline data, it can be associated with distance using scale information.

 (2) Attribute database 1 0 2

 A database that manages the attributes of managed facilities associated with map coordinates. The attribute data has distance information from the base point as code information related to the facility shape data. Facility attributes are managed in association with combinations of start and end distances.

 (3) Map data search section 1 0 3

A function that searches map data such as large scale maps and small scale maps from the map database 1 0 1. If a position coordinate is specified, a map including that coordinate is searched. This map search is performed during scrolling 'focusing' and as the 'viewing point' changes. (4) Attribute search part 1 04

 The attribute database 1 0 2 is searched for the attribute related to the facility shape data described on the map. These attributes are managed in association with facility distance information.

 (5) Map display section 1 0 5

 The display unit displays map data managed for each area. (6) Attribute display area 1 06

 Display the searched attribute data. If there are multiple facility attributes, an attribute list may be created and displayed.

 (7) Attribute selection part 1 0 7

 The facility attribute item displayed as a text list is selected based on an instruction from the user.

 (8) Distance / position converter 1 0 8

 The facility shape data (line data or polyline data consisting of multiple line segments) is tracked, and the position coordinates of the attribute data for which retrieval is requested are obtained based on the distance information of the attribute data.

 (9) Focus scenario determination unit 1 0 9

 The distance between the two points is calculated from the position of the map that intersects the current line-of-sight direction and the position coordinates of the attribute detected by the distance / position converter 1 0 8, and a scroll 'focus execution scenario is created.

 (1 0) Eye-gaze direction scroll part 1 1 0

 Move to change the viewpoint and line of sight at a certain distance in the direction of the focus (focus) and in the opposite direction (defocus) with respect to the current 3D map or flat map display.

 (1 1) Horizontal scroll section 1 1 1

Horizontal view without changing the viewpoint height relative to the current 3D map display Viewpoint · Move to change the line of sight.

 (1 2) Viewpoint calculator 1 1 2

 The viewpoint coordinates and line-of-sight parameters are calculated along with the gaze direction scroll and horizontal scroll.

A method of scrolling using the focus display function shown in Fig. 1 is shown. First, it is assumed that the map data is displayed on the display screen as shown in Fig. 2 (A). In this embodiment, it is assumed that a part of the pipeline facility is displayed in the displayed map. The map data may be a flat map or a three-dimensional map. It is assumed that the feature is expressed in a three-dimensional space and the viewpoint is in the air. The line-of-sight direction only needs to face downward, and may be perpendicular or oblique to the map. This angle can be set initially or can be set by the user. Furthermore, in the present embodiment, the user searches for an attribute relating to a desired point, and the facility position having the attribute is displayed in focus. Attribute data is assumed to be managed by distance. This indicates that the facility is managed by the start distance and end distance from the base point. Figure 2 shows a specific image of the focus process. Here, the result of searching the tube diameter between the start distance and the end distance is shown. Since the position corresponding to the next selected attribute is more than 200 km away from the currently referenced position, the screen will be scrolled. The focus scenario determination unit determines the combination of gaze direction scrolling and horizontal direction scrolling. In Fig. 2 (B), the result of scrolling in the direction opposite to the line of sight is displayed. When scrolling (defocused) in the direction opposite to the line of sight, a large-scale map needs to display a large amount of data. Scrolling by computer may not be able to be performed smoothly. Therefore, the map search unit 1 0 3 retrieves the small scale map 2 0 7 from the map database 1 0 1 Search, display and move to the desired location by horizontal scrolling. Then, scroll the line of sight to the center of the target facility range (focus) and continue focus display 2 0

7 is done. In FIG. 2 (C), the range of attribute data is indicated by the designation symbol 2 0 8.

.. The steps for executing the focus display are shown in Fig. 3, Fig. 4 and Fig. 5. Step 1: Search for attributes (Step 3 0 1): First, as shown in Fig. 2 (a), a specific range (in the figure, a range of 300 to 3500 km) 2 0 1 pipeline Suppose you are referring to facility 2 0 2. Then, a new pipeline range to be referred to is received using the input man-machine interface 2 0 3. Next, the attribute search unit 10 4 searches for attribute data associated with the pipeline facilities in the range input from the attribute database 10 2 (1 1 4). In Fig. 2, first, referring to the integrated value of distance stored in the attribute data, the ID of the specified section is searched to search for attribute data having the same ID. Here, as shown in 204, there is a table in which distance information and ID information are associated with each other. By obtaining the distance information, a corresponding attribute ID within the distance is searched. Then, attribute data is searched based on the attribute ID. This is particularly effective when attributes are managed separately in a plurality of tables. However, the start distance and end distance can be given directly to the attribute data without having the attribute ID. At this time, since a plurality of attributes may be extracted to meet the user's search request, in this case, a list showing an outline of the attribute data is created by the attribute search unit 104. Step 2: Display of attributes (Step 3 0 2): The searched attribute data list is sent to the attribute display section 10 6 (1 1 6), and the list list is displayed as text information 2 0 4. The At this time, it is specified by the distance There may be a plurality of attribute data satisfying the range conditions. Therefore, a list that outlines multiple attribute data is created from the attribute data and displayed as shown in 204.

 Step 3: Select attribute (Step 3 0 3): Send attribute data list to attribute selector 1 0 7 (1 1 7), and select one attribute data to be referred from multiple items list from user Accept input to select. The input is notified to the attribute display section 106. This attribute data is associated with distance data.

 Step 4: Calculate facility location (Step 3 04): Search map data of specified facility shape data based on distance information from map database 1 0 1 by map search unit 1 0 3 (1 1 3) . The retrieved map is sent to the distance / position conversion unit 108 (1 2 5), and the facility shape data is sent from the attribute selection unit 1 ◦ 7 (1 1 8) Based on the distance information, the position coordinates are tracked. Specifically, polyline data that is facility shape data is tracked based on the start distance and end distance. The tracking range is converted to distance by scale. The coordinates of the points on the polyline that tracked each distance are specified. It is easy to specify the coordinates using the polyline coordinate sequence data.

Step 5: Calculation of distance between gazing points (Step 3 0 5): In the focus scenario determination unit 1 09, the coordinates of the intersection (gazing point) between the current viewpoint and the map and the facility position obtained in Step 4 Using coordinates, (1 1 9) Find the linear distance between the two positions. There are two types of scrolling: scrolling along the pipeline facility and scrolling the shortest distance between two points. When scrolling along a pipeline, you can always check the location of the pipeline. On the other hand, if you scroll the shortest distance between two points, you may lose track of the pipeline position along the way. Although it can be done in a short amount of time, it is possible to perform scoring.

 Let the current coordinates of the point of interest be (X1, Y1) and the coordinates of the search point found in step 4 be (X2, Y2). The straight line distance L when scrolling at the shortest distance between two points is

L = Sqrt ((X 1— Χ 2) · (Χ 1— X 2) + (Y 1— Υ 2) · (Υ 1— Y 2))

It becomes. Where Sqrt is the calculation to find the square root. In the case of a horizontal scroll that moves along a pipeline facility, the distance is determined by the sum of the line segments that make up the pipeline. The viewpoint calculation unit 1 1 2 receives the coordinates (X 2, Y 2) (1 2 0), and calculates the range of the viewpoint position coordinates for the gaze direction scramble (defocus and focus) and horizontal scrolling. The correct calculation method is shown in Step 6.

 Step 6: Scroll 'Select focus method (Step 3 0 6): Send the linear distance value obtained in Step 5 to the focus scenario determination unit 1 0 9 (1 1 9), and find the scroll' focus scenario. We consider the following two scenarios based on the threshold £. Here, f is determined in advance and registered as a fixed value in the system.

 Case 1: When L <E: Scroll horizontally while maintaining the line of sight. At this time, the movement distance is calculated so that the gaze point of the line of sight is the position coordinate obtained in step 4. This corresponds to the case where the moving distance is short, and scrolling can be performed in a short time with only horizontal scrolling without scrolling in the gaze direction.

Case 2: L≥ £: Scroll in the opposite direction of the line of sight (default) and continue to adjust the point of interest to the position coordinate obtained in step 4 Scroll horizontally until it reaches 0, and then scroll (focus) in the direction of the line of sight again. Since the coordinates of the current viewpoint are known, the gaze vector is determined when the coordinates of the target value are determined. From this, a force is applied to restore the original magnification even if a new viewpoint position on the vector is calculated. Specifically, this will be described later with reference to FIG.

 Next, Step 7: Scroll 'Execute focus (Step 3 07): Scroll and focus according to the focus scenario. If only horizontal scrolling is performed, perform steps 8 and after, and if scrolling in the line of sight, perform steps 11 and after.

 Step 8: Execution of Case 1 (Step 3 08): When scrolling in the horizontal direction, the horizontal scroll execution unit (1 1 1) that moves in the horizontal direction is started (1 2 1). This selection is made by the user.

 Step 9: Additional display of map data (Step 3 0 9): If the currently referenced map is interrupted, the map search section 1 0 3 will display the position coordinates for the map search (newly required map corners). (Coordinates) is sent (1 1 9), and the required map is searched from the map data base 1 0 1 and displayed on the map display section 1 0 3.

 Step 10: Scroll continuation determination (Step 3 10): Here, if the specified coordinate (X2, Y2) has not been reached, horizontal scrolling continues. Perform step 8 to continue horizontal scrolling. Exit if scrolling is not required. Here, it ends when the new gaze point is set to the center of the screen. This makes it easier to check facility data because the location of interest can be brought to the center of the screen.

Step 1 1: Case 2 execution (Step 3 1 1): In this case It is executed by a combination of linear scrolling and horizontal scrolling. When performing gaze direction scrolling, the gaze direction scroll execution unit (1 1 0) is activated (1 2 2). When scrolling in the horizontal direction, the horizontal scroll execution unit (1 1 1) that moves in the horizontal direction is started (1 2 1).

Step 1 2: Perform defocus (Step 3 1 2): Zoom down from the viewpoint to the direction opposite to the line of sight, which is the direction of the ground. At this time, as a method of defocusing, the line-of-sight direction may be oblique to the vertical direction, but the focus is maintained while maintaining the angle. This allows the user to look over a wider area without losing sight of the point of interest. However, if the normal vector of the vertical direction and the oblique line of sight has a value close to 90 degrees, the change in the height value may not change greatly even if the scoring is performed in the opposite direction. In this case, consider changing the start position in the vertical direction with respect to the ground plane, and change the viewing angle. Specifically, by changing the angle of the step viewpoint rotation matrix, the viewing direction is changed to be closer to the vertical direction without changing the gaze point and distance of the line-of-sight normal vector. The minimum angle is stored in advance, and the viewpoint direction is changed until the angle is exceeded. Then, scroll in the reverse direction until the height value exceeds a predetermined threshold. The values for the rotation angle of the viewpoint and the movement distance in the direction opposite to the line of sight are temporarily stored in memory. As a result, the time required for reverse scoring can be shortened. At this time, the display range expands, so if the display area exceeds the current map range, the map search unit 10 Send the necessary map corner coordinates) (1 2 0) and switch the map (step 3 1 3). In addition, the scroll scenario 2 If an instruction is given to load a map that is rougher than the map scale that was originally displayed, the displayed map can be switched to the display of a coarse scale map. The map database 1 0 1 retrieves the necessary map and displays it in the map display section 1 0 3. In this way, it is possible to avoid losing sight of the facility due to a sudden change of viewpoint by raising the map smoothly while switching. This flow can be realized by zoom-up processing that moves the viewpoint away from the screen. Step 1 3: Map change (Step 3 1 3): As described above, when adding a map according to the focus scenario, the map search unit 1 0 3 searches the map database 1 0 1 for a new map. . The map to be searched is described in the focus scenario. Steps 3 1 3 and 3 1 4 may be repeated multiple times as needed.

 Step 14: Defocus continuation determination (Step 3 1 4): If defocus is not completed in the scroll scenario, continue defocus. If you want to continue defocusing, perform steps 1 and 2. Otherwise, perform steps 1-5.

 Step 15: Execute horizontal scroll (Step 3 15): Execute horizontal scroll following the default. This is almost the same as steps 9 to 11. However, the end described in step 10 is not accompanied. The horizontal scroll in this case is the same as in step 8,

(1) Scroll along pipeline path

 (2) Scroll to move the linear distance between gazing points

Select. The selection is made by the user. Display at a higher height The distance to scroll can be reduced by converting the map scale to a larger one.

Step 1 6: Change map (Step 3 1 6): Focus scenario When a map is added in horizontal scrolling according to 3), a new map is searched from the map database 1 0 1 in the map search unit 1 0 3. The map to search is listed in the focus scenario.

 Step 1 7: Scroll continuation judgment (Step 3 1 7): Judge whether the target coordinates (X2, Y2) have been reached. Execute. Otherwise, carry out step 18.

 Step 18: Focus execution (Step 3 1 8): In Step 1-5, after aligning the line of sight with the center of the screen as the target value as the target value, zoom in to the line of sight and zoom in on the reference location. Do up. Here, scrolling is performed in the reverse order of scrolling in the reverse direction. In other words, when a new gazing point is caught in the line of sight, the line of sight is scrolled so that the line-of-sight distance and line-of-sight angle used before the horizontal scroll are the same. Therefore, in Step 3 1 8, the rotation angle of the viewpoint temporarily stored in the memory in Step 1 2 and the movement distance in the opposite direction of the line of sight are read in advance, and horizontal scrolling is performed from the target point to the point considering the viewpoint angle. Cancel. Then, while approaching the ground surface in the direction approaching the ground surface from the viewpoint position, the distance to the gazing point is changed while approaching. This zooms in and ends scrolling at the initial viewpoint distance (altitude). This action brings the gaze point to the center of the screen. When moving, the user looks at the entire map and eventually automatically returns to the original magnification, making it easy for the user to grasp the map size.

In step 1 or 2, when defocusing is performed after the line-of-sight angle is converted to the vertical direction smaller than the predetermined value, focus is performed in the converted viewpoint direction and focus is stopped at the predetermined distance. conversion Conversion to the previous viewpoint angle is performed. This allows the user to maintain the preferred viewing direction.

 Step 19: Map change (Step 3 19): In addition, when adding a map according to the focus scenario at the time of the focus in Step 18, the map search unit 10 To search a simple map. The map to be searched is listed in the focus scenario. The map to be searched here refers to a case where a map with a gradually reduced scale is necessary for focusing. Step 3 1 In the same way as 3), it is easy to grasp the map of the user by switching the map and focusing.

Step 20: Focus continuation determination (Step 3 20): Step 18 is executed to continue focusing. Otherwise it ends. This ends when the focus reaches a predetermined magnification. Figure 6 shows the flow of such defocals, horizontal movement, and focus. First, the current map (4 1 1) reference is the range shown in the screen 4 0 1. The normal direction 40 3 of the screen is the gaze direction, which has a gaze point 4 0 2. Then, when executing steps 11 to 14, the flow is as follows. First, the screen 4 0 1 moves to 4 0 4 by defocusing in the direction opposite to the line of sight. The focus scenario determination unit 1 9 manages this defocus distance. The screen then moves according to the moving direction vector 40 6 by horizontal scrolling and reaches the position indicated by 4 07. At this position, the direction of the line of sight coincides with the coordinates of the point of gaze 4 10. Then, in order to focus according to the normal vector 40 9 of the screen, the screen is moved to the position 40 8 in the direction of the line of sight. Here, the distance between the screen 4 0 1 and the screen 4 0 4 is a large scale map This distance is a predetermined threshold until 5 searches are involved. The moving direction vector 40 6 is determined so that the point of interest 41 0 is the point where the normal vector of screen 40 7 intersects the map 4 1 1. As a result, the display magnification before scrolling and display with only the display position changed in the line-of-sight direction can be displayed.

 Figure 7 shows an example of a focus scenario. 5 0 1 is a parameter for defocusing, <defocus> is the length to move in the direction opposite to the line of sight, <defocus map change> is the moving distance when switching maps, <map accuracy > Indicates the basic scale of the map to be changed, and <Map> indicates the map number. 5 0 2 is a parameter for horizontal scrolling. <Moving distance X> is the moving distance in the X axis direction, <Moving distance Y> is the moving distance in the Y axis direction, and <Map> is the above moving distance. Indicates the map number to be switched. In the case of horizontal scrolling, the display is changed to a map in a different area according to the moving distance. 5 0 3 is a parameter for focus, <Focus> is the length to move in the direction of the line of sight, <Further Force Map Change> is the moving distance when switching maps, <Map Accuracy> is the map to change The basic scale of <Map> is the map number. These values will be determined in Step 6.

 (Example 2)

The focus display can also be applied when detecting oil leaks or gas leaks in the pipeline. When oil or gas leaks occur, there is a function to determine the distance from the base point or sensor in the fluid transport control system (SCADA: Supervised Control and Data Acquisition). Power The place cannot be specified. Therefore, by applying the present application, the position is specified by a map, and when the position is detected, the above defocus / focus display steps are applied to display the location. 6 Do it. At this time, the search of attribute data is a search of distance information of oil ♦ gas leak by SCADA. The steps are as follows.

 Step 1: Oil 'Gas Leak Sensor Data Acquisition: Acquire oil' gas leak sensor data from SCADA etc. This is acquired as distance information.

 Step 2: Distance information and position conversion: This corresponds to step 304. The distance information acquired in step 1 is sent to the distance / position converter 1 0 8 and converted into position coordinates.

 Step 3: Execution of focus: Apply the above steps 3 0 5 to 3 1 4 to create a focus scenario and display a defocused focus display.

 In addition, such focus can be applied when the attribute itself is moving in a long-distance structure. For example, the product interface tracking tracking is shown as an example. A product interface is a mixing zone that occurs at the boundary when different oils flow continuously through a pipeline. Usually, the flow rate and the delivery pressure are controlled to minimize the size of this mixing area. However, this mixing area gradually increases as it flows through the pipeline. By grasping the position of this product interface, separation work becomes easy. Here, the location of the product interface changes from moment to moment. For this reason, the scrolling method will also change. The steps are shown below.

Step 1: Interface position calculation: The distance of the product interface is obtained by SCADA. The position of the product interface is acquired from SCADA. This distance can also be calculated. However, this calculation method may be arbitrary. 7 Step 2: Calculate the position of the product interface: Distance / position converter 1 0 8 converts the distance to the interface into position coordinates. At this time, the disclosure position and end position of the interface are obtained.

 Step 3: Execute to focus: Apply the above steps 3 0 5 to 3 1 4 to create a focus scenario and display a defocused focus display.

 According to the present invention, it is easy to switch a region to be referenced with the same line of sight. Also, the location (gaze point) that you want to refer to is always placed in the center of the screen and displayed in an enlarged manner, making it easier for users to refer to the location on the map. Since the point of interest is placed at the center of the screen in the three-dimensional space, it is possible to enlarge the point of interest even when using a three-dimensional map as well as a planar map. Industrial applicability

 The present invention is effective when searching and displaying information for managing facilities over long distances. In addition to pipelines, it can be applied to roads, railways, rivers, and other scrolls.

Claims

The scope of the claims
1. a map display that displays a map containing long-distance structures;
A selection unit that receives designation of a target point of a long-distance structure that is not displayed on the display means;
A focus scenario determination unit that generates a scroll scenario for scrolling the map from the displayed point to the specified target point;
A scroll mouth execution unit that scrolls and displays a map according to the focus scenario,
The scroll execution unit gradually increases the altitude of the line-of-sight position from the displayed map, horizontally scrolls from the raised viewpoint to the specified target point horizontally, and the specified point is the map. A map display system that displays a map of the designated point at a point that is the center of the screen of the display unit with the viewpoint position close to the target point until the enlargement ratio before scrolling is reached.
 2. The map display system according to claim 1, wherein the scroll execution unit further includes means for horizontally scrolling to the designated point without changing the altitude.
 3. The scroll execution unit determines whether to perform scrolling according to claim 1 or to perform scrolling according to claim 2, according to the distance from the displayed map to the designated point. The map display system according to claim 2.
4. The scroll execution unit selects and executes either scrolling the shortest distance from the displayed map to the designated target point, or scrolling along the long distance structure. To do 9. The map display system according to claim 1, wherein
5. The attribute of the long-distance structure is displayed on the map display section, and the designation of the point of the long-distance structure not displayed is received by receiving the selection of the attribute. A map display system according to any one of the above.
 6. The scroll execution unit gradually raises the altitude of the line-of-sight position while maintaining the viewpoint angle for viewing the map displayed on the map display unit, and moves the viewpoint position closer to the target point. The map display system according to any one of claims 1 to 5.
7. The scroll execution unit gradually increases the gaze position altitude from the displayed map while switching the displayed map to a map having a larger scale when the viewpoint height reaches a predetermined value. 7. The map display system according to claim 1, wherein the map display system is a feature.
 8. The scroll execution unit switches the displayed map to a map having a smaller scale when the viewpoint height reaches a predetermined value, and sets the viewpoint position to the target point until the enlargement ratio before scrolling is reached. The map display system according to any one of claims 1 to 7, wherein the map display system is brought closer.
 9. When the viewpoint angle for viewing the map displayed on the map display unit is smaller than a predetermined value, the scroll execution unit performs a process of gradually increasing the gaze position altitude after changing it to the predetermined value or more. The map display system according to any one of claims 1 to 8, characterized in that:
 1 0. Display a map containing long-range structures,
Receives designation as a target point for a long-distance structure that is not displayed, generates a scroll scenario that scrolls the map from the displayed point to the specified target point, In accordance with the focus scenario, the altitude of the line-of-sight position is gradually raised from the displayed map, and the display is scrolled horizontally from the raised viewpoint to the designated target point horizontally, and the designated point is displayed on the map. In order to execute the map display method, the map of the designated point is displayed with the viewpoint position close to the target point until the enlargement rate before scrolling is reached at the point at the center of the screen program.
1 1. When scrolling horizontally, scrolling the shortest distance from the displayed map to the specified target point, or scrolling along the long distance structure. The program according to claim 10, wherein the program is selected.
 1 2. The program according to claim 10 or 11, wherein the altitude is raised or lowered while maintaining a viewing angle with respect to the displayed map.
PCT/JP2005/022590 2005-11-30 2005-11-30 Map display system and map display program WO2007063610A1 (en)

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Cited By (3)

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