JP2015200548A - Map information display system, method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a map information display system capable of displaying a moving body while determining an appropriate display scale of a time and space data when the speed and distance of the moving body changes.SOLUTION: A storage stores a time and space data in which time and space on a map is divided into grids and a unique time and space ID is given to each grid. A reduction scale is calculated for each time range while searching the storage and calculating the number of grids in which the moving body is included in a specified time range and the moving body is displayed using the reduction scale. With this, the moving body can be displayed with an appropriate reduction scale without calculating the moving distance and speed thereof.

Description

  The present invention relates to a map information display system, method, and program, and more particularly, to a geographic information display system, method, and program for displaying a mobile object whose position on a map changes with time at an appropriate map scale. is there.

  In GIS (Geographic Information System) that handles spatial information, it is possible to handle data including time information and visualize changes with time of a moving object such as a person or a vehicle. Various techniques have been proposed in which a moving body is represented by time information and spatial information (time-space information), and the trajectory of the moving body is analyzed or the trajectory is displayed.

  For example, Patent Document 1 discloses a display device that displays a video image of main trajectories representing concentration / divergence of data including time information and spatial information, and movement for each time. Patent Document 2 assigns an identifier common to grid time-series data and point time-series data in order to quickly search spatio-temporal data in which a spatio-temporal region is defined by time and space. A spatio-temporal data management system that searches for grid time-series data and point time-series data in association with each other by specifying is disclosed.

  In a navigation system that displays a moving object, it is preferable to display map information on a scale that is easy for the user to see. As an example, in Patent Document 3, even if the movement speed changes by setting / changing the optimal map scale according to the movement speed, map information of the optimum scale is always displayed corresponding to the movement speed. A navigation system for display is disclosed.

JP 2011-8635 A JP 2014-2519 A Japanese Patent Laid-Open No. 5-35183

  In many cases, animation display is used to confirm the position of the moving object in a certain time zone including the current time. In this case, in the data in which the time zone in which the moving body moves finely within a narrow range and the time zone in which the mobile body moves greatly over a wide range are mixed, if the display scale is determined from a wide range including all the movement ranges, the movement is fine. The movement of the target cannot be grasped in the time zone.

  In the navigation system, the type of target moving object (person, vehicle, aircraft, ship, etc.) is generally fixed, and parameters such as moving speed and moving distance can be set by focusing on the object of the system. It is. However, in GIS, the type of moving object is not fixed, and there is a possibility that an appropriate display scale cannot be calculated with a single parameter such as speed or moving distance. In Patent Document 3, it is described that the optimal map scale is set / changed according to the moving speed. However, in the system that processes the spatio-temporal data of the moving body, how the moving speed is reflected on the map scale. There is no suggestion of.

  An object of the present invention is to provide a map information display system, method, and program capable of displaying a moving body by determining an appropriate display scale using spatio-temporal data when the speed and distance of the moving body change. is there.

In order to solve the above problems, the map information display system according to the present invention preferably includes a processing device that executes a program and a storage unit that stores data, and the mobile device that executes the program by the processing device. Is a map information display system that displays the information on the display screen,
The storage unit divides the space-time in which the moving body moves into a plurality of space-time regions in time and space, and stores space-time data in which each space-time region is given a unique space-time ID,
The processing device is executed by executing a program.
Obtaining spatio-temporal data having a spatio-temporal ID in a specified time range from the storage unit, and calculating the number of the spatio-temporal data in which the mobile object is included;
Calculate the scale based on the calculated number of spatiotemporal data and the size of the display screen,
In accordance with the calculated scale, the spatiotemporal data having the spatiotemporal ID is displayed on the display screen.
It is configured as a map information display system characterized by this.

According to a preferred example, there is provided a map information display system that includes a processing device that executes a program and a storage unit that stores data, and that displays the information of the moving object on the display screen by executing the program on the processing device. And
The storage unit divides the space-time in which the moving body moves into a plurality of space-time regions in time and space, and stores space-time data in which each space-time region is given a unique space-time ID,
The processing device is executed by executing a program.
Means for searching the storage unit to obtain spatiotemporal data having a spatiotemporal ID in a specified time range;
Means for specifying a spatial range in which the moving object is included from the acquired spatio-temporal data;
Means for calculating a rectangular width according to the relationship between the specified spatial range and the vertical and horizontal lengths of the display screen;
Means for obtaining a scale based on the calculated small value of the rectangular width;
A map information display system comprising: means for displaying spatiotemporal data having the spatiotemporal ID on the display screen according to the calculated scale.

  The present invention can also be understood as a map information display method in the map information display system and a program executed by the processing device of the map information display system.

  ADVANTAGE OF THE INVENTION According to this invention, the display scale suitable for the display of the mobile body in arbitrary time zones can be easily calculated | required using the spatiotemporal data which divided | segmented the map into the grid | lattice form in spatiotemporal. This makes it possible to easily calculate the optimum display scale regardless of changes in the moving distance and speed of the moving body.

It is a system configuration | structure figure of GIS by one Example. It is a function block diagram of GIS by one Example. It is a figure which shows the example of the display scale determination based on the moving distance of a moving body. It is a figure which shows the example of the display scale determination based on the speed of a moving body. It is a schematic diagram which shows the example which changes the display scale of a moving body. It is a flowchart figure which shows the processing operation of the display scale of a moving body. It is a flowchart figure which shows the calculation processing operation of the display scale of a moving body. It is a figure which shows the example of space-time data (point time series data). It is a figure which shows the example of space-time data (point time series data). It is a figure explaining the registration process of spatiotemporal data. It is a figure which shows the example of space-time management data. It is a figure which shows the structural example of the spatiotemporal data in which the point time series data was registered. It is a figure which shows the physical arrangement | positioning of point time series data. It is a figure explaining the outline | summary of the extraction operation | movement (S701) of the spatiotemporal management data in the scale calculation example 1. FIG. It is a figure explaining the outline | summary of the operation | movement (S702-S703) which specifies a space-time range from the space-time ID in the scale calculation example 1. FIG. It is a figure explaining the outline | summary of the determination operation (S704) of the scale in the scale calculation example 1. FIG. It is a figure explaining the outline | summary of the extraction operation | movement (S701) of the spatiotemporal management data in the scale calculation example 2. FIG. It is a figure explaining the outline | summary of the operation | movement (S702-S703) which specifies a space-time range from the space-time ID in the scale calculation example 2. FIG. It is a figure explaining the outline | summary of the determination operation (S704) of the scale in the scale calculation example 2. FIG. It is a figure explaining the outline | summary of the extraction operation | movement (S701) of the spatiotemporal management data in the scale calculation example 3. FIG. It is a figure explaining the outline | summary of the operation | movement (S702-S703) which specifies a spatiotemporal range from spatiotemporal ID in the scale calculation example 3. FIG. It is a figure explaining the outline | summary of the determination operation (S704) of the scale in the scale calculation example 3. FIG.

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.
FIG. 1 is an overall configuration diagram of a GIS according to an embodiment. The GIS includes a GIS client 100, a GIS server 102, and a map database 103. The GIS client 100 is a personal computer (PC) or a terminal, and includes a storage unit that stores programs and data, a processing device that executes the programs, an input device, and a display. In this embodiment, the map display program 101 is stored in the storage unit. The map display program is executed by the processing device, thereby realizing a function of performing data communication with the GIS server 102 and displaying the map data transmitted from the GIS server 102 on the display screen. This function will be described later with reference to FIG.

  The GIS server 102 includes a storage unit that stores programs and data, a processing device that executes the programs, an input device, and a display device. In the present embodiment, the map search program 103 is executed by the processing device, thereby realizing a function specific to the present embodiment. These functions will be described later with reference to FIG.

FIG. 2 is a functional configuration diagram realized by executing a GIS program.
The GIS system according to the present embodiment is a grid (space) as defined in Patent Document 2, which is defined by dividing a moving body that moves in a certain area into time and space and assigning a unique identification number to each. This is realized by applying a spatio-temporal data management system that can be represented by data.

  In the GIS system, a function realized by executing the map display program 101 in the GIS client 100 includes a condition designation interface 201 that designates conditions (range and time zone) of data to be displayed, and a search result that changes with time. In accordance with the conditions designated by the condition designation interface 201, the animation display function 202 for displaying the map data in animation, the map data display function 203 for normally displaying the searched map data, and the data transmission / reception with the map search program 103 This is a transmission / reception function 202. The map data (that is, the moving object) that satisfies the conditions is animated or displayed normally.

  The functions realized by the execution of the map search program 103 in the GIS server 102 are a data transmission / reception function 206 for transmitting / receiving data to / from the map display program 101, and a function for calculating a grid number from a map range of a specified condition. 207, a function 208 for calculating the number of grids satisfying a condition from the map range and time zone of the designated condition, and a database connection function 209 for searching from the map database 104 under the designated condition. The map database 210 stores spatio-temporal data composed of time, space, and grid identification ID (referred to as spatio-temporal ID).

  Here, an example of spatiotemporal data used in the spatiotemporal data management system and a spatiotemporal data registration process will be described with reference to FIGS. 8A and 8B to 12.

8A and 8B show examples of spatiotemporal data (point time series data).
In the illustrated example, the spatio-temporal data is shown as grid time-series data in a two-dimensional space. As shown in FIG. 8B, the spatial range is a range from the lower left coordinate (0, 0) to the upper right coordinate (100, 100). The start time of the grid time-series data is t = 0, the period is 150, t = 150, and t = 300. In order to simplify the explanation, the time and coordinate values are expressed by simple integer values. Actually, for example, the time is expressed by year / month / day / hour / minute / second or UNIX time, and the coordinate value is expressed by latitude / longitude coordinates or a plane rectangular coordinate system.

The spatiotemporal data (point time series data) includes time, space (coordinate values), and object ID, as in the table shown in FIG. 8A. In the “space” column of this table, the coordinate value of the position where the object exists is described. The object ID is an identifier for uniquely identifying the object.
FIG. 8B shows the positions (coordinates) of the moving object with the object IDs 1 and 2 on the xy plane (time-space division region) at times t = 0, t = 150, and t = 300.

FIG. 9 is a diagram for explaining the registration processing of spatiotemporal data.
The spatiotemporal data is point time series data that is spatially divided into grids and includes time series data (time, coordinates, attribute values) in each division.

  First, as shown in FIG. 9A, before registration of the spatio-temporal data, the spatio-temporal division area is determined by dividing the spatio-temporal area according to the spatio-temporal management data 111 (see FIG. 10) input by the user. Each space-time division area is associated with time-series data. As shown in FIG. 9B, the point time series data may include a plurality of time series data in one space-time division region. If there is no data on the positions of multiple trajectories included in one spatio-temporal division region or the boundary of the spatio-temporal division region, the plurality of attribute values are obtained by interpolation using neighboring data. The data registered at the boundary.

  Thereafter, the spatio-temporal ID of each spatio-temporal data is calculated, and as shown in FIG. 9C, the spatio-temporal division area (object ID and time-series data) is associated with the spatio-temporal ID. By expressing the spatio-temporal ID with a one-dimensional integer value and associating each spatio-temporal divided area with the spatio-temporal ID, each spatio-temporal divided area can be expressed with a unique integer value. Furthermore, an index (spatiotemporal index data) of the spatiotemporal division region associated with the spatiotemporal ID is generated.

  As shown in FIG. 9D, the spatio-temporal data of one spatio-temporal divided area includes a spatio-temporal ID, object ID, time-series data (time, coordinate value, attribute value), minimum attribute value, and attribute value. Including the maximum value of. By expressing the time, coordinate value, and attribute value of the time series data of the point time series data as relative values, the time series data can also be expressed with a small number of bytes. In addition, if the same coordinate value and attribute value continue in time series data, the data size may be reduced by equivalent compression that thins out the data between them.

  After that, sort the highly related data so that they are placed close to the physical. For example, it arrange | positions in order from an old time slot | zone, and if it is the same time slot | zone, it arrange | positions in the order which traces space in Z order. As a result, as shown in FIG. 9E, the spatio-temporal ID of each spatio-temporal divided region on the xy plane whose time zone is t1 is given.

FIG. 10 shows an example of spatiotemporal management data.
The spatiotemporal management data 111 of the point time series data includes a data name, a management parameter, and a value.

  The data name represents the type of data targeted by the management parameter registered in the spatiotemporal management data 111, and includes, for example, “point time series data” and “grid time series data”.

Among the management parameters, “number of space-time ID bits” defines how many bits an integer value represents the space-time ID. The “space dimension” is “2” for a two-dimensional xy plane and “3” for a three-dimensional xyz space.
From the space-time management data 111, the number of space bits of the space-time ID (the minimum number of bits necessary to represent the number of divisions of each axis of space) and the number of time bits can be obtained.

  For example, if the space-time management data 111 is divided into four in the x-axis direction, the x-axis direction is 2 bits, and if the y-axis direction is divided into four bits, the y-axis is 2 bits, and the total number of space bits is 4 bits. The number of time bits is a value obtained by subtracting the number of space bits from the number of space-time ID bits, and the space-time management data 111 is 4 bits.

FIG. 11 shows a configuration example of spatio-temporal data in which point time-series data is registered.
The illustrated spatiotemporal data 112 is generated by applying the definition of the spatiotemporal management data 111 shown in FIG. 10 to the spatiotemporal data (point time series data) shown in FIG. 8A.

  As shown in FIG. 11, the spatio-temporal data (point time-series data) 112 includes a spatio-temporal ID, an object ID, and time-series data (time, coordinates), and is configured by, for example, a tabular spatio-temporal table. The time series data may include attribute values in addition to time and coordinates. In this case, the spatiotemporal table may include a minimum value and a maximum value (attribute value MIN and attribute value MAX) of the attribute value. The attribute value MIN is the minimum value of the attribute value of the time series data of the corresponding record, and the attribute value MAX is the maximum value of the attribute value of the time series data of the record. The attribute value MIN and the attribute value MAX are used in a spatio-temporal search including attribute value conditions.

  In this embodiment, data is registered at the boundary of the spatio-temporal division region for use during spatio-temporal search. In this example, since the time unit division width is 100, the attribute values at times t = 100 and t = 200 are registered by interpolation from actual data. For example, in a record with a space-time ID of 0 and an object ID of 1, data on a line with y = 25 (75) is obtained by interpolation using time-series data (0, 10, 10) and (150, 10, 40). , 10, 25) can be generated. Further, in a record with a space-time ID of 2 and an object ID of 1, data on a line at t = 100 (100 is obtained by interpolation using time-series data (0, 10, 10) and (150, 10, 40). , 10, 30) can be generated.

FIG. 12 shows the physical arrangement of the point time series data.
In FIG. 12, numerical values in squares indicate space-time IDs and object IDs in order from the left, and each square is a record of space-time data including time-series data (attribute value MIN and attribute value MAX as necessary). . The spatiotemporal data is stored in the map DB 104 or other storage device (not shown) (for example, a disk device) in the order of the spatiotemporal ID. In the same time zone, data is arranged in the storage device in the order of close spatial distance (in order of space-time ID), and further, the data is arranged in time zone order.

  In the animation display, data of a certain time width T is acquired and imaged. In this embodiment, the animation range is 0 to 100 seconds. This range is given by user operations or program defaults.

  In a system using spatio-temporal data as in the present embodiment, retrieval is often performed on the condition of a place having a certain time and width, so that data having a short spatial distance is often accessed together. . For this reason, by arranging such data having a short spatial distance close to each other on the disk, it is possible to reduce the I / O processing at the time of searching, search at high speed, and display an animation.

  The overview of the spatio-temporal data and its management system has been described above. Next, an example of calculating a map scale using the above-described spatiotemporal data will be described.

FIG. 3 conceptually shows an example of display scale determination based on the number of grids.
A map obtained by dividing a map into a grid at regular intervals and assigning a unique grid identification ID (for example, a grid number) to each grid is defined (300). At this time, when considering a case where the moving body moves over a long distance (wide range) in a certain time zone (301), the number of lattices including the locus of the moving body increases (302). On the other hand, when considering a case where the moving body moves in a narrow range in a certain time zone (303), the number of grids including the trajectory of the moving body within that time decreases (304).

FIG. 4 also conceptually shows an example of display scale determination based on the number of grids.
FIG. 3 shows an example of changes in the number of lattices depending on the moving range of the moving body, while FIG. 4 shows changes in the number of lattices based on the speed of the moving body. Similar to FIG. 3, a unique grid number assigned to each grid is defined (400). At this time, considering the case where the moving body moves at high speed in a certain time zone (401), the number of lattices included in the moving body moving at high speed increases (402). On the other hand, considering the case where the moving body moves at a low speed in a certain time zone (403), the number of grids included in the time of the moving body decreases (404). As described above, the display scale calculation based on the number of grids is realized for moving bodies of various speeds as in the example of FIG.

  As shown in FIGS. 3 and 4, the method for calculating the moving distance and moving speed of the moving body based on the number of grids in space and time needs to calculate the displacement of the speed and distance from the spatial information as in the prior art. Absent. For this reason, if the display scale is calculated based on the number of grids, the display scale can be obtained at high speed.

  FIG. 5 shows an outline of the operation of changing the display scale from the number of grids in which the trajectory of the moving object is included. Since the moving body (501) moving in the direction of the arrow in the current display scale (500) is moving at high speed, it is in an inclusive relationship with a wide range of grids (502). Thereafter, when the moving body (504) moves at a low speed with a reduced speed, the number of grids in an inclusive relationship with the moving body decreases. As a result, the display scale can be changed to the optimum display scale by detecting the increase / decrease in the number of grids without calculating the speed or moving distance of the moving body (503).

FIG. 6 shows an example of the display scale processing operation in a certain time zone.
This processing is performed by executing the lattice number calculation function 207 and the lattice number calculation function 208 of the map search program 103 in the GIS server 102 and the map display program 101 in the GIS client 100.

  First, for the map display program 101, the user designates time information and space information to be searched from the input device of the GIS client 100 (S600). Then, the map search program 103 calculates the number of grids included in the information based on the specified time information and space information (S601). Then, an appropriate display scale is calculated from the obtained number of grids (S602). Finally, according to the obtained display scale, the moving object is displayed on the display of the GIS client 100 as an animation or a normal map by the animation display function 202 or the map data display function 203 of the map display program 101 (S603).

  Next, with reference to FIG. 7, the details of the processing of steps S601 and S602 (display scale calculation processing) will be described. In order to facilitate understanding, FIGS. 13 to 15 are also referred to.

<Scale calculation example 1>
First, a list of space-time IDs in the time zone specified in step S601 is extracted (S701). As shown in FIG. 13, the time-space table (see FIG. 11) for registering the point time-series data 112 is searched and the space-time ID and the corresponding object ID and Extract time-series data. In the illustrated example, the point time series data is extracted from the range of 0 ≦ space-time ID <16 every 16-time space-time ID (FIG. 13B). At this stage, the first time series data to be animated was extracted.

Next, the space-time ID list is converted into lattice coordinates (S702). This process is shown in FIG.
The relationship (x, y) between each divided region and the spatiotemporal ID in the spatiotemporal region is as shown in the upper left diagram of FIG. It is necessary to specify a spatial range from the extracted space-time ID. As shown in the middle part of FIG. 14, this specifying method is represented by four digits when expressed in binary when the space-time ID is in the range of 0 to 15. For example, in the spatio-temporal ID = 2, each digit of (y2, x2, y1, x1) corresponds to the x, y coordinates and is represented by (0, 0, 1, 0), and (x, y) = (0, 1).

  In this way, the same processing is performed on all the acquired space-time IDs, and the maximum and minimum values of x and y are obtained. Thereby, the rectangular widths Δx and Δy are calculated from the lattice coordinates (S703). In the illustrated example, the rectangular width in the space-time ID in the range of 0 to 15 is Δx = 1 and Δy = 1.

Next, the scale s is calculated from the obtained rectangular widths Δx and Δy (S704). This process is shown in FIG. Here, it is assumed that the number of pixels (x, y) of the display screen is horizontal w = 640 and vertical h = 480. Assuming that the divided spatiotemporal regions (Δx, Δy) are displayed on this display screen, the scale s is the smaller of w / Δx and h / Δy (the spatial range is longer with respect to the screen width). Determined. For example, it is obtained as follows.
Δx = number of grids in the x direction × x-axis unit division width (see FIG. 10) = 2 × 25 = 50
Δy = number of grids in y direction × y-axis unit division width (see FIG. 10) = 2 × 25 = 50
That is, the scale s = min (640/50, 480/50) = 9.6.

Therefore, with respect to the time-series data for each object ID of the space-time ID extracted earlier, each coordinate value is scaled by s, and these objects are displayed as an animation.
If (x0, y0) = (0, 0) becomes the lower left position (0,480), (0,10,10) → (0, (10-x0) × 9.6, 480+ (10-y0 ) × 9.6,) = (0, 96, 384) is (t, x, y) in the screen coordinate system.
By the above processing operation, the animation of the point time series data corresponding to the object ID in the range of 0 ≦ time-space ID <16 extracted first is performed.

<Scale calculation example 2>
Similarly, point time-series data corresponding to the following 16 space-time IDs are extracted, and the same processing is performed (S701 to S704). This process is shown in FIGS. As shown in FIG. 16, as a result of searching the spatio-temporal table (see FIG. 11), two spatio-temporal IDs (18 19) is extracted. Thereafter, the same processing in steps S702 to S703 as shown in FIG. 17 is performed, and as a result, the scale s = 12.8 is obtained as shown in FIG. Then, the point time series data of the object IDs of the space-time IDs 18 and 19 are displayed in an animated manner at this scale s.

<Scale calculation example 3>
Similarly, as shown in FIG. 19 to FIG. 21, the scale s (= 12) for the following 16 space-time IDs, 32 ≦ space-time ID <48 space-time ID (= 34, 35, 36). .8) is required. Then, the point time series data corresponding to these object IDs is displayed in an animation at the scale s.

  From the scale calculation example described above, the scale s can be calculated by specifying the spatial range from the number of spatio-temporal IDs extracted for each predetermined range (for example, 16-space-time IDs). In this case, it can be seen that the calculated scale s differs depending on the amount of space-time ID in a predetermined range (in other words, the number of grids). That is, when the scale calculation example 1 is compared with the scale calculation examples 2 and 3, the scale calculation example 1 has a larger number of spatio-temporal IDs (the scale calculation example 1 has four spatio-temporal IDs, and the scale calculation example 2 Then two). This is because the moving distance (or moving speed) of the moving object is large in the scale calculation example 1, and the scale s is small (= 9.6). On the other hand, the scale calculation example 2 has a smaller moving distance (or moving speed) of the moving body (two extracted space-time IDs) and a larger scale s than the scale calculation example 1 (= 12.8). .

As mentioned above, although one Example was described, this invention is not limited to the said Example, It can implement by changing variously.
For example, in the above embodiment, the map search program 103 has the data transmission / reception function 206, the lattice number calculation function 207, the lattice number calculation function 208, and the database connection function 209. However, in a modified example, these functions may be configured as separate programs, or may be configured as a program having one or more functions. Similarly, the map display program 101 may be configured as a program having one or more functions.

  In the GIS, when the data is displayed as an animation in monitoring a moving object including time information or analyzing the movement history, the display scale of the map can be optimized. This can be expected to improve the efficiency of monitoring and behavior analysis of moving objects.

100: GIS client 101: Map display program 102: GIS server 103: Map search program 104: Map database 202: Animation display function 203: Map data display function 207: Grid number calculation function 208: Grid number calculation function

Claims (7)

A map information display system having a processing device for executing a program and a storage unit for storing data, and executing the program on the processing device to display information on a moving body on a display screen,
The storage unit divides the space-time in which the moving body moves into a plurality of space-time regions in time and space, and stores space-time data in which each space-time region is given a unique space-time ID,
The processing device is executed by executing a program.
Obtaining spatio-temporal data having a spatio-temporal ID in a specified time range from the storage unit, and calculating the number of the spatio-temporal data in which the mobile object is included;
Calculate the scale based on the calculated number of spatiotemporal data and the size of the display screen,
In accordance with the calculated scale, the spatiotemporal data having the spatiotemporal ID is displayed on the display screen.
A map information display system characterized by that. A map information display system having a processing device for executing a program and a storage unit for storing data, and executing the program on the processing device to display information on a moving body on a display screen,
The storage unit divides the space-time in which the moving body moves into a plurality of space-time regions in time and space, and stores space-time data in which each space-time region is given a unique space-time ID,
The processing device is executed by executing a program.
Means for searching the storage unit to obtain spatiotemporal data having a spatiotemporal ID in a specified time range;
Means for specifying a spatial range in which the moving object is included from the acquired spatio-temporal data;
Means for calculating a rectangular width according to the relationship between the specified spatial range and the vertical and horizontal lengths of the display screen;
Means for obtaining a scale based on the calculated small value of the rectangular width;
A map information display system comprising: means for displaying spatiotemporal data having the spatiotemporal ID on the display screen according to the calculated scale. The spatio-temporal data is time-series data representing the boundary of the spatio-temporal division region,
The time series data is animated on the display screen at the calculated scale.
The map information display system according to claim 1 or 2. The spatial range is specified by converting the acquired spatio-temporal data into x and y coordinates, and obtaining the maximum and minimum values of the x and y coordinates to identify the spatial range.
The map information display system according to any one of claims 1 to 3. The rectangular width calculation means includes:
Divide the number of vertical and horizontal pixels of the rectangular display screen by the maximum / minimum values of the specified x and y coordinates, and set the smallest one of the calculated values as the scale s to be obtained,
5. The map information display system according to claim 4, wherein each coordinate value of the time-series data corresponding to the time-space ID is displayed on the display screen after being scaled by s. A map information display method in a system that has a processing device that executes a program and a storage unit that stores data, and that displays information on a moving object on the display screen by executing the program on the processing device,
Dividing the spatiotemporal space in which the mobile body moves into a plurality of spatiotemporal regions in time and space, and storing spatiotemporal data in which a spatiotemporal ID unique to each spatiotemporal region is given to the storage unit;
The processing device is executed by executing a program.
Obtaining spatio-temporal data having a spatio-temporal ID in a specified time range from the storage unit, and calculating the number of spatio-temporal data in which the mobile object is included;
Calculating a scale based on the calculated number of spatiotemporal data and the size of the display screen;
Displaying the spatiotemporal data having the spatiotemporal ID on the display screen according to the calculated scale. In a map information display system that includes a processing device that executes a program and a storage unit that stores data, and that displays information on a moving body by executing the program using the processing device, the storage unit includes the storage device The space-time in which the moving body moves is divided into a plurality of space-time areas in time and space, and the space-time data in which each space-time area is given a unique space-time ID is stored.
The program executed by the processing device is:
Searching the storage unit to obtain spatiotemporal data having a spatiotemporal ID in a specified time range, and calculating the number of spatiotemporal data in which a moving object is included;
Calculating a scale based on the calculated number of spatiotemporal data and the size of the display screen;
And displaying the spatiotemporal data having the spatiotemporal ID on the display screen according to the calculated scale.

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