JPH0944513A - Discrete system initial display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of record retrieval by a user when a discrete system record group is initially displayed. SOLUTION: In a data base 10 wherein information on respective buildings in a real estate map 200, coordinate data on the center of gravity of the building group are further registered as a gravity center point record. The coordinates of the center of gravity can be found by finding the mean of the position coordinates of respective records. This gravity center calculation is performed, for example, periodically. Then when a command for real estate map inquiry is inputted from the user to the computer, the computer reads the gravity center point record out of the data base 10, calculates the arrangement position of each record on a display screen so that the gravity center point matches the reference point of the display screen, and displays an initial screen on the display screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying a distribution arrangement of each record of a discrete record group on a screen, and more particularly to a method of displaying an initial screen of a discrete record group.

[0002]

2. Description of the Related Art A discrete record group is a record group composed of a plurality of records, focusing on a specific numerical data item (one numerical value or a set of plural numerical values) of each record. Is a record group in which the respective records are discretely scattered and arranged when they are spatially arranged (for example, two-dimensional arrangement).

A real estate map is an example of the discrete record group. In this case, information about each building scattered on the real estate map is registered as a record in the database. Each record includes, as data items, information such as a building identification code, position coordinates, owner name, and address. Then, the real estate map is obtained by arranging the symbols indicating these respective records two-dimensionally according to the respective position coordinates. In addition to this, the discrete system record group includes, for example, a distribution facility diagram, and in this case, information about each electric pole scattered in the distribution facility diagram becomes each record. In addition to the position coordinates, when the spatial arrangement of records is obtained and displayed according to other numerical data (the dimension of this arrangement space corresponds to the number of types of numerical data of interest), each record is When distributed as discrete points in the spatial arrangement, the set of these records can be said to be a discrete record group.

When a group of discrete records stored in a database is displayed on a display screen of a computer for use by a user, specific data items of each record, for example, position coordinates are extracted and each record is based on this. It is often practiced to obtain the layout configuration of and display the layout configuration on the screen. This display method is effective for the user to visually understand the arrangement configuration of each record. For example, in the case of real estate map data, the records for each building are arranged in the database according to the order of input, etc. By mapping and displaying on a two-dimensional plane based on this, it becomes easy for the user to grasp the positional relationship of each building, and the efficiency of data search / survey is improved.

A conventional example of a screen display method for such a discrete record group will be described below with reference to the drawings.

FIG. 8 is a diagram showing a data structure of a discrete record group and a display example thereof when a real estate map display is taken as an example. In the real estate map 800, symbols indicating each building are arranged according to the position coordinates of the building. Generally, since a real estate map often covers a wide area, it is divided into a plurality of sections for the convenience of search when performing computer processing. In the example of FIG. 8, the real estate map 800 is divided into four sections, and section codes A to D are attached to the respective sections. These partition codes are included in the data item of each record and are used as a search key or the like.

The information of the real estate map 800 is stored in the database 10 in a predetermined record format. That is, for each building, the identification code, the section where the building is located,
Location coordinates and other building attributes (owner name, construction date,
Records having data items such as addresses are created, and these records are registered in the database 10. When a real estate map is displayed on the screen 22 of the computer 20, the database 10 is searched for the record of each building, the layout configuration of each building is obtained based on the position coordinate data of each record, and the symbol of each building is determined according to the layout configuration. Is displayed on the screen. In addition, data items such as the owner can be displayed near the symbol of the corresponding building if necessary.

If the target area of the real estate map covers a wide area, the entire real estate map may not be displayed due to the scale of the screen display. In this case, only the displayable area is displayed on the screen, and a desired portion of the real estate map is displayed by scrolling the screen using a mouse or the like.

In this example, let us consider a case where the user inputs a command to the computer 20 to instruct the real estate map inquiry process. In this case, conventionally, when the user inputs a command for starting inquiry processing, the computer 20
Searches the database 10 for a predetermined area of the real estate map (for example, an area at the upper left corner of the map), obtains a layout configuration of buildings, configures a screen, and initially displays the screen. After this initial display, as shown in FIG. 9, the user scrolls the screen with the mouse or the like to move the display area to a desired area.

[0010]

As described above,
In the conventional discrete initial display method, the initial screen is an area that is set regardless of the distribution status of the discrete record group, so depending on the distribution status of the records, an area that has no records is initially displayed. For example, the initial screen was not always useful for subsequent user searches.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an initial display method useful for a user's search in displaying a discrete record group.

[0012]

In order to achieve the above-mentioned object, a discrete system initial display method according to the present invention has a discrete system record group consisting of a plurality of records in which at least one of data items is numerical data. And a layout configuration of each of the records relating to the designated one or more numerical data items, and each of the regions having a predetermined size in the distribution space of each record relating to the designated numerical data item. In a discrete record processing device having display processing means for displaying the arrangement configuration of records, a center of gravity point for the designated numeric data item of the discrete record group is determined based on the designated numeric data item of each record. The calculated center of gravity point is registered in the database in association with the discrete record group, and the display processing is performed. When displaying the initial screen of the discrete record group by the step, the barycentric point corresponding to the discrete record group is read from the database, and the barycentric point is matched with the reference point of the screen to display the arrangement configuration. To do. The designated numerical data item includes, for example, position coordinates of each record. With such a configuration, when the discrete record group is initially displayed, the display area is selected so that the center of gravity G of the discrete record group coincides with the reference point of the screen, so that the initial display is always performed. An area with a dense record distribution is displayed. Therefore, the probability that the record that the user wants to inquire is displayed at the time of initial display is high, and even if the inquiry target is not displayed on the screen at the time of initial display, the distance to scroll the screen to the inquiry target is average. Since the length becomes shorter, the efficiency of user search can be improved.

Further, in the discrete system initial display method according to the present invention, each record of the discrete system record group is divided into a plurality of groups with respect to a predetermined data item, and the centroid point is calculated for each group to calculate the database. If the group designation is added to the command for instructing the initial display of the discrete record group, the barycentric point of the designated group is matched with the reference point of the screen to arrange the records. It is characterized by displaying. According to this configuration, when the discrete record group is divided into groups based on specific data items, a portion where the distribution of records belonging to a desired group is dense can be initially displayed.

Further, in the discrete system initial display method according to the present invention, the distribution space is divided into a plurality of sections, the center of gravity point is calculated for each section and registered in the database, and the initial display of discrete system records is performed. When a section designation is added to the command to be instructed, the barycentric point of the designated section is matched with the reference point of the screen to display the arrangement configuration of each record. With such a configuration, when the distribution space of the discrete record group is divided into a plurality of sections, it is possible to initially display a portion where the record distribution is dense in a desired section.

Further, in the discrete system initial display method according to the present invention, the distribution space is divided into a plurality of sections, and the number of records contained in the section is calculated for each section. It is characterized in that the barycentric point of the discrete system record group is calculated based on the information of the section in which the number of belonging records is equal to or more than a predetermined threshold value. According to this configuration, it is possible to reduce the calculation amount of the center-of-gravity point calculation by considering that the section with a small number of records has little influence on the determination of the position of the center-of-gravity point and excludes it from the calculation target.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of a discrete system initial display method according to the present invention will be described below with reference to the drawings.

Configuration example 1. FIG. 1 is a schematic diagram showing an initial display state of a discrete record group when the discrete initial display method according to the present invention is applied. The feature of this configuration example is that the data of the center of gravity of the discrete record group is stored in the database 10, and the display is performed in the layout such that the center of gravity is the reference point of the display screen 22 at the time of initial display. It is in. This center of gravity is obtained from a numerical data item (for example, in the case of a real estate map, position coordinates of each building) relating to the layout configuration of each record.

That is, the database 10 stores records for each element 101 of the discrete system 100 in a predetermined format, and the center of gravity G of the discrete system record group.
Coordinate data is stored in association with the discrete record group. For example, when displaying the arrangement of each record with respect to the xy coordinate system as in a real estate map, the center of gravity G
Each coordinate component of is the average value of the x coordinate and the average value of the y coordinate of each record. Thus, the center of gravity G is the average value of each numerical data item of the discrete record,
Each coordinate component is used. The calculation of the center of gravity G is performed every time each record of the database 10 is updated or periodically, and reflects the latest state of the database 10. And computer 2
When the user inputs a command for inquiring discrete record group to 0, the computer 20 makes the database 1
The coordinates of the center of gravity are read from 0, and the center of gravity is displayed on the screen 22.
The initial screen is displayed in a layout that matches the reference point (for example, the screen center).

As described above, according to this configuration, when the discrete record group is initially displayed, the display area is selected so that the center of gravity G of the discrete record group coincides with the reference point on the screen. , In the initial display, the area where the record distribution is always dense is displayed, which leads to the improvement of the search efficiency of the user.

Next, the method according to this configuration will be described in more detail by taking a real estate map as an example.

FIG. 2 shows an example of the data structure of the discrete record group when the real estate map display is taken as an example. In the data structure shown in FIG. 2, the database 10
The center of gravity G (xg, yg) of the discrete record (building) group
Is stored. That is, in this configuration,
In the database 10, records including predetermined data items (similar to those shown in FIG. 8) such as an identification code and position coordinates for each building of the real estate map 200 are registered, and the center of gravity G of all the buildings is registered. Coordinates are registered in association with the discrete record group.

In this example, the center of gravity G is calculated by the center of gravity calculating process shown in FIG. In the center-of-gravity point calculation process, first, the database is searched to read the coordinate data of each record (building) in the discrete record group (S30).
0). Next, the average value Xg of the X coordinates of each coordinate data is calculated (S302), and the average value Yg of the Y coordinates is calculated (S304). The calculation of this average value is performed based on the following equation.

Xg = ΣXi / N, Yg = ΣYi / N In the above equation, N is the total number of discrete records, (X
i, Yi) indicate position coordinate data of each record (building) (i = 1, 2, ..., N). Then, the operator Σ indicates that i adds 1 to N and Xi or Yi.

The coordinates of the center of gravity G thus obtained are registered in the center of gravity record of the database 10 (S306).

Such a center-of-gravity point calculation process is periodically performed by a timed start-up process such as a nighttime batch process. That is, the center-of-gravity point calculation processing is performed at preset time intervals by a timer or the like, and the center-of-gravity point of the discrete system record at that time point is calculated and registered. Note that this center-of-gravity point calculation processing is performed by a computer (so-called host computer) that manages the database 10. Considering the processing efficiency of the host computer, it is desirable to perform such a center-of-gravity point calculation process during a time period when the user's use of the computer is low.
In this way, by periodically updating the center of gravity, it is possible to deal with the case where the distribution state of discrete records changes. Then, the time interval for performing this centroid calculation process is
It is set by the user according to the length of the fluctuation cycle of the record distribution state. If the distribution of records fluctuates significantly, the time interval is shortened, and if the records fluctuate gently, the time interval is lengthened.

If the computer has a large capacity, it is possible to perform the center-of-gravity point calculation process each time each record in the database is updated. In this case, the initial screen display can always be performed based on the barycentric point corresponding to the latest state of the discrete record group even when the distribution state of the discrete record changes rapidly.

The above is the flow of the centroid calculation process in this configuration example. Next, the initial screen display processing in this configuration example will be described with reference to the flowchart in FIG.

First, when the user inputs a command for inquiring a real estate map (S400), it is necessary to perform an initial display of the real estate map. Therefore, first, from the center of gravity record of the database, the coordinates (Xg, Y
g) is read (S402).

Here, in the database 10, the position coordinates of each building when the origin of the coordinates of the real estate map is the origin are registered as the coordinate data of each building. When this is displayed on the screen 22, Displays the coordinates of each building on screen 2
It is necessary to perform coordinate conversion to the coordinate system of 2. So, next,
The position of the coordinate origin of the real estate map when the center of gravity G is matched with the reference point of the screen 22 (for example, the center point of the screen) is calculated in the coordinate system of the screen 22 (S40).
4). That is, in S404, the position coordinates that represent the position of the real estate map origin in the screen coordinate system are obtained. And
Each record is read from the database, and each record on the screen 22 is based on the coordinates of each record (represented by a coordinate system with the origin of the real estate map as the origin) and the position of the origin of the real estate map represented by the screen coordinate system. The layout position of the record is calculated, and only each record (building) included in the display area of the screen 22 is displayed on the screen 22 (S406). After such initial screen display, the user can search for a desired record by scrolling the screen with a mouse or the like as in the conventional case.

According to such processing, since the center of gravity of the discrete record group always comes to the center of the screen 22 at the time of initial display, the screen 22 always initially displays a dense portion of records (buildings). . Therefore, the user can start the inquiry work of the real estate map from the area in which the records are densely arranged in this way, and the efficiency of searching for the desired record can be improved. That is, according to this configuration, since the area where the distribution of records is dense is initially displayed, the probability that the record that the user wants to inquire is displayed at the time of initial display is high, and the inquiry target is at the time of initial display. Even if it is not displayed on the screen, the distance to scroll the screen to the inquiry target becomes shorter on average. Therefore, the efficiency of user search can be improved.

In the above example, the center point of the screen is given as an example of the reference point of the screen 22, but any point may be selected as the reference point of the screen.

Further, in the above example, it is explained that only one discrete record group is stored in the database 10, but the method of the present invention stores plural kinds of discrete record groups in one database. It is also effective when it is. In this case, the center of gravity is calculated and registered for each discrete record group. In this case, each barycentric point record includes the identification code of the discrete system record group and the coordinates of the barycentric point in order to identify which discrete system record group the barycentric point corresponds to.

Configuration example 2. Next, a second configuration example of the discrete system initial display method according to the present invention will be described. This configuration example is a suitable initial screen display method when the discrete record group is divided into a plurality of groups in advance by focusing on a certain data item. This configuration example will be described by taking a real estate map as an example.

In the case of inquiring a real estate map, for example, a host computer having a database is installed at the head office of a real estate company, and the host computer at the head office is accessed online from the terminal of each branch to inquire the real estate map. In this case, since a holding area is generally set for each branch, the real estate map is often inquired around this holding area. Therefore, in the case of an inquiry from a branch, it is desirable that the acceptance area of the branch is displayed as the initial screen.

Therefore, in this configuration example, the center of gravity of the record (building) is obtained in advance for each holding area and registered in the database. Then, when there is a real estate map inquiry from a branch, the host computer examines the holding area of the branch, reads the center of gravity of the holding area from the database, and the center of gravity becomes the reference point on the screen. Display each record on screen to match.

FIG. 5 is a diagram schematically showing an initial display state in this configuration example. In FIG. 5, each building of the real estate map 500 is divided into a plurality of receiving areas 510. In the database 10, in addition to the record for each building, the record of the center of gravity of each receiving area 510 is registered. Here, the record of each building has a field of a holding area, and the identification code (area code) of the holding area in which the building exists is stored.

The center of gravity of each of the receiving areas is obtained by averaging the coordinates of the buildings included in the receiving area, as in the case of the configuration example 1. Then, it is registered in the database 10 as a center of gravity record having the area code and the coordinates of the center of gravity as data items.

When it is desired to initially display the coverage area of the branch from the terminal of the branch, for example, by inputting the identification code of the coverage area of the branch (for example, as an argument) to the real estate map inquiry command, the host The computer reads the area code and reads the center of gravity of the receiving area corresponding to the area code from the database 10. Then, each building is displayed on the screen so that its center of gravity coincides with the reference point on the screen 22.

With such a configuration, since the area most frequently accessed by the branch is initially displayed, it is possible to improve the efficiency of user search.

In this example, the receiving area code added to the inquiry command is not limited to the receiving area of the branch, and may be the code of the receiving area of another branch. That is, by designating the identification code of each area, it is possible to access the area where the distribution of the desired area is the most dense when the initial screen is displayed.

Configuration example 3. Another example of a suitable initial screen display method in the case where a discrete record is focused on a certain data item and is divided into a plurality of groups in advance will be described. This configuration example is also based on the real estate map.

Although various buildings are registered in the real estate map, each building may be grouped according to its type for convenience of management. For example, a building can be roughly divided into private houses, shops, public facilities, and the like. In using such a real estate map, it may be desired to focus on a specific type of building for the investigation. In this case, it is desirable from the viewpoint of efficiency of subsequent searches that the initial screen of the real estate map display shows a region in which buildings of the type of interest are most densely distributed. Therefore, in this configuration, the center of gravity of the distribution is calculated for each type of building, and the type of interest is specified when the inquiry command of the real estate map is input, so that the center of gravity of the type of interest is the center of the screen. It is displayed so that it comes to. Hereinafter, a specific example of this configuration will be described with reference to FIG.

As shown in FIG. 6, in this example, the real estate map 600 includes a private house layer 600a and a store layer 6
00b and the public facility layer 600c are considered to be superposed. In this case, a field indicating the type (layer) of the building is added to each record of the database 10 in addition to the usual identification code and coordinates. Then, the record of the center of gravity of each layer is further registered in the database 10.

The center of gravity of each of these layers is the same as in the above-mentioned configuration example 1.
Similar to the above, it is obtained by averaging the coordinates of the buildings included in each layer. The result of this calculation is registered in the database 10 as a center-of-gravity point record having the layer code and the center-of-gravity point coordinate as data items.

If the user wants to pay particular attention to a specific type of building in the inquiry of the real estate map, the user adds the designation of the specific building type (layer code) to the command for instructing the inquiry. When the computer detects that the layer code is added to the command, the computer reads the barycentric point coordinates corresponding to the layer code from the database 10 so that the barycentric point coordinates match the reference point on the screen 22. Display each building on the screen.

According to such a configuration, in the initial display of the real estate map, it becomes possible to display the region in which the distribution of the type of building the user is paying attention to is the densest, and the subsequent search by the user is facilitated. Become.

As described above, in the configuration examples 2 and 3, the real estate map is taken as an example to describe the method of initial display when each building is divided into groups according to the coverage area of the branch and the type of building. However, the methods shown in the configuration examples 2 and 3 are applicable not only to the coverage area of the branch office and the type of building, but also to the case of grouping based on other attributes of the building. In other words, this method is a discrete system in which each building is divided into groups by paying attention to a specific attribute among building attributes (data items), and data can be searched by focusing on one of those groups. Effective for record processing equipment.

Configuration example 4. This configuration example aims at reducing the calculation amount of the center-of-gravity point calculation when the number of records in the discrete record group becomes enormous.

When the distribution range of the records of the discrete record group is wide, it is explained in the prior art (see FIG. 8) that the distribution space of the discrete record group is divided into a plurality of sections for management for the convenience of computer processing. But said. And
In the case where the number of records in the discrete record group is extremely large, the distribution space may be divided into smaller partitions so that the number of elements per partition falls within an appropriate range. This configuration example aims to reduce the amount of calculation of the center of gravity operation when the distribution space of the discrete record group is divided into a plurality of sections and many records are included.

The procedure of calculating the center of gravity in this configuration example will be described with reference to the drawing. As shown in FIG. 7A, the distribution space of the discrete record group is divided into a plurality of sections in advance. To do. Then, in the database, as in the case of FIG. 8, the record of each element includes the code of the belonging section as a data item. In such a case,
In this configuration example, first, for each section, the number of records included in that section is obtained. The number of records is calculated by using the belonging section as a key, searching for an element that belongs to the section for each section, and counting the number. In the example of FIG. 7, the number of records in each section is as shown in (b). In FIG. 7B, the number in parentheses indicates the number of records in the section, and the symbols A to F above the section indicate the identification code of the section. When the number of records in each section is obtained in this way, only the section having the number of records equal to or greater than a predetermined threshold value is selected from among them, and the data of the elements included in these selected sections are averaged. Find the center of gravity of discrete records. That is, in the example of FIG. 7, the center of gravity of the discrete record group is obtained by averaging the predetermined numerical data of the records included in the sections K, S, J, T, and N. That is, here
A section with a small number of records is considered to have little influence on the determination of the position of the center of gravity, and is excluded from the calculation, thereby reducing the calculation amount of the calculation of the center of gravity. As a result, the number of data used for the calculation of the center of gravity is reduced, and the calculation amount can be reduced.

Next, an example in which this method is developed will be described. In this example, the data of each record of the discrete system itself is not used in the calculation of the center of gravity. That is, in this example, the number of records is calculated for each section, the section with the number of records equal to or greater than a predetermined threshold value is selected, and instead of averaging each record in the selected section, the number of records equal to or greater than the threshold value is selected. The center of gravity is obtained by averaging the representative points (for example, the center points of the sections) of the sections having. For example, in the example of FIG. 7, the average of the coordinates of the representative points of the sections K, S, J, T, and N is the center of gravity of the entire discrete record group. According to such processing, the amount of calculation can be significantly reduced.

Further, as a modification of this method, a method of taking a weighted average of the representative points of each section by using the number of records of the section as “weight” instead of selecting the section by a threshold value is also conceivable. That is, this is a method in which the data of the representative point of each section is multiplied by the number of records in that section, the multiplication result is added for all the sections, and the result of dividing the addition result by the total number of records is used as the center of gravity point. According to this method, it is possible to obtain the center of gravity with a certain degree of precision with a calculation amount much smaller than that of averaging all elements.

The specific example of the embodiment of the discrete system initial display method according to the present invention has been described above. In the above example, the real estate map was used as an example of the discrete record group, but the method according to the present invention is not limited to the real estate map, and can be applied to various other discrete record groups. For example, as the discrete record group to which the present invention can be applied, in addition to the above-described distribution facility diagram, a diagram showing a meteorological phenomenon (this is a discrete system in which atmospheric pressure at each spatial point is a constituent element). And diagrams showing the habitat of animals (this is a discrete system in which animals are components). Furthermore, the discrete system record group to which the present invention is applicable is not limited to the discrete system related to spatial position coordinates such as the real estate map.
According to the method of the present invention, each record includes a data item having numeric data as an element, and what kind of data is a discrete record group for displaying the spatial distribution state of each record for the numeric data? Can also be applied to.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an initial display state of a discrete system record group when a discrete system initial display method according to the present invention is applied.

FIG. 2 is a diagram showing an example of a data structure of a discrete record group in the case of displaying a real estate map in Configuration Example 1 of the present invention.

FIG. 3 is a flowchart showing a flow of a centroid calculation process.

FIG. 4 is a flowchart showing a flow of initial screen display processing.

FIG. 5 is a schematic diagram showing an initial display state of a discrete system record group in Configuration Example 2 of the present invention.

FIG. 6 is a schematic diagram showing an initial display state of a discrete system record group in Configuration Example 3 of the present invention.

FIG. 7 is a diagram for explaining a procedure for calculating the center of gravity of a discrete system record group in Configuration Example 4 of the present invention.

FIG. 8 is a diagram for explaining a method of displaying a discrete record group.

FIG. 9 is a diagram for explaining a method of displaying a discrete record group.

[Explanation of symbols]

 10 database, 20 computer, 22 display screen.

Claims (8)

[Claims] 1. A database storing a discrete record group consisting of a plurality of records in which at least one of the data items is numerical data, and an arrangement configuration of each of the records relating to one or more designated numerical data items. In the discrete record processing apparatus, the display processing unit obtains and displays the arrangement configuration of each record for a region of a predetermined size in the distribution space of each record related to the designated numerical data item. Based on the designated numerical data item of the record, calculate the center of gravity for the designated numerical data item of the discrete system record group, and register the obtained center of gravity point in the database in association with the discrete system record group, When the initial screen of the discrete record group is displayed by the display processing means, it corresponds to the discrete record group. An initial display method for a discrete system, characterized in that the center of gravity point is read from the database, and the center of gravity point is matched with a reference point on the screen to display the arrangement configuration. 2. A database storing a discrete record group consisting of a plurality of records including position coordinates as data items, an arrangement configuration of each record regarding the position coordinates, and a distribution space of each record regarding the position coordinates. In a discrete record processing device having a display processing means for displaying the arrangement configuration of each record for a region of a predetermined size, a center of gravity of the discrete record group is calculated based on the position coordinates of each record, The obtained center of gravity is registered in the database in association with the discrete record group, and the center of gravity corresponding to the discrete record group is displayed from the database at the time of displaying the initial screen of the discrete record group by the display processing means. It is characterized in that the arrangement configuration is displayed by reading out and making the center of gravity point coincide with a reference point on the screen. Discrete system initial display method. 3. The discrete system initial display method according to claim 1, wherein each record of the discrete system record group is divided into a plurality of groups with respect to a predetermined data item, and the center of gravity of each group. When the point is calculated and registered in the database, and the group designation is added to the command for instructing the initial display of the discrete record group, the center of gravity point of the designated group is matched with the reference point on the screen. A discrete system initial display method characterized by displaying the arrangement configuration of each record. 4. The discrete system initial display method according to claim 1 or 2, wherein the distribution space is divided into a plurality of sections, and a centroid point is calculated for each section and registered in the database. When a section designation is added to the command for instructing the initial display of the system record, the barycentric point of the designated section is made to coincide with the reference point of the screen and the arrangement configuration of each record is displayed. Discrete system initial display method. 5. The discrete system initial display method according to claim 1 or 2, wherein the distribution space is divided into a plurality of sections, and the number of records included in each section is calculated for each section to obtain a discrete system record. In the initial display of, the discrete system initial display method is characterized in that the center of gravity of the discrete record group is calculated based on the information of the section in which the number of belonging records is equal to or more than a predetermined threshold value among the sections. 6. The discrete system initial display method according to claim 5, wherein the center of gravity of the discrete system record group is calculated based on the representative points of the sections in which the number of belonging records is equal to or more than the predetermined threshold value. Initial display method. 7. The discrete system initial display method according to any one of claims 1 to 6, characterized in that the center of gravity is calculated periodically to update the registration of the database. . 8. The discrete system initial display method according to claim 1, wherein each bar of the database is interlocked with updating to calculate the barycentric point, and the barycentric point registered in the database is updated. A discrete system initial display method characterized by: