JP2008102252A - Map display device and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly display information of a large number of objects in a map display device for transmitting information to a user by displaying a figure such as an icon on an electronic map. <P>SOLUTION: A scale level calculating section 131 calculates a scale level in accordance with the scale of a display map. When the scale level is changed, a tabulation execution determining section 133 determines it as tabulation processing execution. When it is determined as tabulation processing execution: a tabulation area calculating section 134 sets a range larger than the display area of the display map as a tabulation area; a region dividing section 136 divides the tabulation area into divided regions; an object number tabulating section 137 tabulates the number of display objects in the divided region; and an aggregated figure selecting section 138 selects aggregated figures according to the tabulated number of display objects. An aggregated figure drawing section 150 creates an aggregated display picture whereon the aggregated figures selected by the aggregated figure selecting section 138 are drawn, and a map display section 180 superposes the aggregated display picture on the map and performs the display. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a map display device and a program for displaying a graphic indicating a display target on an electronic map.

There is a device that displays a graphic such as an icon on an electronic map and transmits information about an object existing at a geographical position corresponding to the display position of the graphic to a user viewing the electronic map.
If the scale is large, graphics such as icons can be individually identified. However, if the scale is small, the figures overlap and it becomes difficult to visually recognize information, so the convenience and visibility of information deteriorates.
In addition, when the scale is reduced, the display area displayed on one map becomes wider, and the number of objects to be displayed on the map increases, so that the process of displaying the map takes time and prompt information transmission is possible. become unable.
For this reason, there is a technique for displaying a plurality of graphics as one or displaying them by thinning them out when graphics such as icons overlap.
JP 2003-337041 A JP 2005-283630 A JP 2002-372427 A JP 2003-288005 A JP 2004-69561 A JP 2004-163592 A JP 2005-266094 A JP 2006-155603 A

In the method of thinning and displaying, information about the object corresponding to the thinned figure is discarded, so that there is a large lack of information transmitted to the user. In particular, when displaying the damage situation at the time of disaster occurrence, there is a risk that important information may be overlooked due to such lack of information.
In addition, the method for determining the overlap of figures may take time to determine when a large number of objects must be displayed, and the map may not be displayed quickly.
The present invention has been made to solve the above-described problems, for example, and when information about a large number of objects needs to be transmitted quickly, a map with little missing information is quickly displayed. It is an object of the present invention to provide a map display device that can be used.

The map display device according to the present invention includes:
A storage device that stores information; a processing device that processes information; a display device that displays information; a display target database storage unit; an aggregated graphic setting unit; an aggregated graphic drawing unit; and a map display unit ,
The display target database storage unit is
Using the storage device, the position data indicating the geographical position of the display target to be displayed on the map is stored,
The aggregate figure setting part
Using the above processing device, determine whether to execute the aggregation process,
When it is determined that the aggregation processing is to be executed, the processing device is used to divide the aggregation area including the display area to be displayed on the map and wider than the display area into a plurality of divided areas, and For each, using the processing device, based on the position data stored in the display target database storage unit, the number of display objects located in the divided area is totaled, and the display target is tabulated using the processing device The figure corresponding to the number of figures is selected, and using the storage device, the selected figure data indicating the selected figure is stored,
The aggregate figure drawing unit
Using the processing device, for each of the plurality of divided areas, the figure indicated by the selected figure data stored by the aggregated figure setting unit is drawn at a position on the figure corresponding to the geographical position of the divided area. , Generate an aggregate view,
The map display section
Using the processing device, the aggregated display diagram generated by the aggregated graphic drawing unit is superimposed on the map representing the display area to generate a display map, and the display generated using the display device It is characterized by displaying a map.

The map display device according to the present invention further includes an input device for inputting information, and a scale input unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The aggregate figure setting part
Using the processing device, the scale level is calculated based on the scale input by the scale input unit, the calculated scale level is stored using the storage device, and the calculated scale is calculated using the processing device. Determine if the level has changed,
When it is determined that the scale level has been changed, the processing device is used to determine that the aggregation process is to be executed.

The map display device according to the present invention further includes an input device for inputting information, a scale input unit, and an individual figure drawing unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The aggregate figure setting part
Based on the scale input by the scale input unit using the processing device, the scale level is calculated,
The individual figure drawing unit
Using the processing device, based on the position data stored in the display target database storage unit, a predetermined figure is drawn at a position on the diagram corresponding to the geographical position indicated by the position data, and an individual display diagram Produces
The map display section
When the scale level calculated by the aggregate figure setting unit is larger than a predetermined scale level, the individual display drawing generated by the individual figure drawing unit is displayed on the map representing the display area using the processing device. A display map is generated by superimposing them.

The map display device according to the present invention includes:
The display target database storage unit further includes:
Using the storage device, store urgency data indicating the necessity of emergency response of the display target,
The individual figure drawing unit
When the scale level calculated by the aggregate graphic setting unit is smaller than a predetermined scale level, the display device needs to be urgently handled based on the urgency data stored in the display target database storage unit using the processing device. The display data is determined based on the position data stored in the display object database storage unit for the display object that is determined to have a high necessity for emergency response using the processing device. Draw a specific figure at a location on the diagram corresponding to the geographic location shown to generate an individual view
The map display section
When the scale level calculated by the aggregated graphic setting unit is smaller than a predetermined scale level, the aggregated display diagram generated by the aggregated graphic drawing unit is created on the map representing the display area using the processing device. The display map is generated by superimposing and further superimposing the individual display drawings generated by the individual graphic drawing unit on the superimposition.

The map display device according to the present invention further includes an input device for inputting information, a scale input unit, and a center input unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The central input section is
Using the above input device, input the coordinates of the center point of the map to be displayed,
The aggregate figure setting part
Based on the scale input by the scale input unit using the processing device, the scale level is calculated,
When it is determined that the aggregation process is executed, the processing device is used to calculate the area of the aggregation area based on the calculated scale level, and the central point input by the central input unit using the processing apparatus The total area is calculated on the basis of the coordinates and the calculated total area size.

The map display device according to the present invention includes:
The aggregate figure setting part
Using the storage device, storing the calculated area data indicating the calculated area,
Using the processing device, based on the coordinates of the center point input by the center input unit and the stored total area data, determine whether the display area falls within the total area,
When it is determined that the display area does not fall within the total area, it is determined that the total process is performed using the processing device.

The map display device according to the present invention includes:
The aggregate figure setting part
Using the storage device, storing the calculated area data indicating the calculated area,
Using the processing device, based on the coordinates of the center point input by the center input unit and the stored total area data, determine whether the display area is near the end of the total area,
When it is determined that the display area is close to the end of the total area, it is determined that the total process is performed using the processing device.

The map display device according to the present invention includes:
The display target database storage unit further includes:
Using the storage device, state data indicating the state of the display target is stored,
The aggregate figure setting unit further includes:
When it is determined that the aggregation processing is to be executed, each of the plurality of divided areas is positioned in the divided area based on the position data and the state data stored in the display target database storage unit using the processing device. Among the display objects to be counted, the number of the predetermined state display objects in the predetermined state is counted, and the corresponding figure is calculated based on the total number of display objects and the number of the predetermined state display objects by using the processing device. It is characterized by selecting.

The map display device according to the present invention includes:
The aggregate figure setting part
Using the above processing device, calculate the predetermined state ratio by dividing the number of the total number of display target objects by the total number of display objects, and use the above processing device to correspond to the total number of display objects A figure having a shape to be selected and a color corresponding to the calculated predetermined state ratio is selected.

The map display device according to the present invention further includes a display target database update unit,
The display target database update unit
Update the data stored in the display target database storage unit,
The aggregate figure setting part
When the display target database update unit updates data, it is determined that the aggregation process is executed.

The map display device according to the present invention includes:
The display target database update unit
Update the data stored in the display target database storage unit at a predetermined cycle,
The aggregate figure setting part
When the predetermined period has elapsed, it is determined that the aggregation process is executed.

The program according to the present invention is
A computer having an input device for inputting information, a storage device for storing information, a processing device for processing information, and a display device for displaying information is made to function as the map display device according to the present invention. To do.

  According to the map display device of the present invention, for example, it is determined whether or not the aggregated graphic setting unit executes the aggregation process, and the aggregation process is executed only when it is determined that the aggregation process is performed. Has an effect of shortening the time required until the display map is displayed.

Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS.

FIG. 1 is a diagram showing an example of the appearance of the map display device 100 according to this embodiment.
The map display device 100 includes a system unit 910, a display device 901 having a CRT (Cathode / Ray / Tube) or LCD (liquid crystal) display screen, a keyboard 902 (Key / Board: K / B), a mouse 903, and an FDD904 (Flexible). (Disk / Drive), compact disk device 905 (CDD), printer device 906, scanner device 907, and other hardware resources, which are connected by cables and signal lines.
The system unit 910 is a computer, and is connected to the facsimile machine 932 and the telephone 931 with a cable, and is connected to the Internet 940 via a local area network 942 (LAN) and a gateway 941.

FIG. 2 is a diagram illustrating an example of hardware resources of the map display device 100 according to this embodiment.
In FIG. 2, the map display device 100 includes a CPU 911 (also referred to as a central processing unit, a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, or a processor) that executes a program. The CPU 911 is connected to a ROM 913, a RAM 914, a communication device 915, a display device 901, a keyboard 902, a mouse 903, an FDD 904, a CDD 905, a printer device 906, a scanner device 907, and a magnetic disk device 920 via a bus 912, and these hardware components. Control the device. Instead of the magnetic disk device 920, a storage device such as an optical disk device or a memory card read / write device may be used.
The RAM 914 is an example of a volatile memory. The storage media of the ROM 913, the FDD 904, the CDD 905, and the magnetic disk device 920 are an example of a nonvolatile memory. These are examples of a storage device or a storage unit.
A communication device 915, a keyboard 902, a scanner device 907, an FDD 904, and the like are examples of an input unit and an input device.
Further, the communication device 915, the display device 901, the printer device 906, and the like are examples of an output unit and an output device.

The communication device 915 is connected to a facsimile machine 932, a telephone 931, a LAN 942, and the like. The communication device 915 is not limited to the LAN 942, and may be connected to the Internet 940, a WAN (wide area network) such as ISDN, or the like. When connected to a WAN such as the Internet 940 or ISDN, the gateway 941 is unnecessary.
The magnetic disk device 920 stores an operating system 921 (OS), a window system 922, a program group 923, and a file group 924. The programs in the program group 923 are executed by the CPU 911, the operating system 921, and the window system 922.

The program group 923 stores programs that execute functions described as “˜units” in the description of the embodiments described below. The program is read and executed by the CPU 911.
In the file group 924, information, data, signal values, variable values, and parameters described as “determination results of”, “calculation results of”, and “processing results of” in the description of the embodiments described below. Are stored as items of “˜file” and “˜database”. The “˜file” and “˜database” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 911 via a read / write circuit, and extracted, searched, referenced, compared, Used for CPU operations such as calculation, calculation, processing, output, printing, and display. Information, data, signal values, variable values, and parameters are temporarily stored in the main memory, cache memory, and buffer memory during the CPU operations of extraction, search, reference, comparison, operation, calculation, processing, output, printing, and display. Is remembered.
In addition, the arrows in the flowcharts described in the following description of the embodiments mainly indicate input / output of data and signals. The data and signal values are the RAM 914 memory, the FDD 904 flexible disk, the CDD 905 compact disk, and the magnetic field. It is recorded on a recording medium such as a magnetic disk, other optical disk, mini disk, DVD (Digital Versatile Disc) of the disk device 920. Data and signals are transmitted online via a bus 912, signal lines, cables, or other transmission media.

  In the description of the embodiments described below, what is described as “to part” may be “to circuit”, “to device”, and “to device”, and “to step” and “to”. “Procedure” and “˜Process” may be used. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 913. Alternatively, it may be implemented only by software, or only by hardware such as elements, devices, substrates, and wirings, by a combination of software and hardware, or by a combination of firmware. Firmware and software are stored as programs in a recording medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, and a DVD. The program is read by the CPU 911 and executed by the CPU 911. That is, the program causes the computer to function as “to part” described below. Alternatively, the procedure or method of “to part” described below is executed by a computer.

FIG. 3 is a system configuration diagram showing an example of the overall configuration of the disaster information system 200 using the map display device 100 in this embodiment.
The map information providing server apparatus 201 receives a request from the map display apparatus 100 via a network such as the Internet 940, for example, generates data indicating a map representing the requested area, and sends it to the map display apparatus 100. It is the device which transmits to. The map information providing server device 201 provides, for example, an ASP (Application Service Provider) type service (map information providing ASP service).
In addition, when the map display apparatus 100 produces | generates a map itself, the map information provision server apparatus 201 does not need to be.
The sensor 203 is a sensor installed in a building 803, for example. The sensor 202 is a device that detects a target disaster, such as a seismic intensity sensor that detects the occurrence of an earthquake, a fire sensor that detects the occurrence of a fire, and a power failure sensor that detects a power failure. When detecting a disaster, the sensor 203 transmits disaster information indicating the content of the detected disaster to the map display device 100 via a network such as the Internet 940, for example.
The portable terminal device 202 is a terminal device carried by the worker 802. The worker 802 visits the site when a disaster occurs, confirms the damage status, and takes necessary measures. When the worker 802 inputs the damage status, the progress status of the recovery work, and the like to the mobile terminal device 202, the mobile terminal device 202 inputs the information input to the map display device 100 via a network such as the Internet 940, for example. Send.
In addition, a user such as a controller who has viewed the map displayed on the map display device 100 inputs an instruction to the worker 802 (for example, the next work site or a known disaster situation) to the map display device 100. The map display device 100 may transmit information indicating the input instruction to the mobile terminal device 202 via the Internet 940, for example, and the mobile terminal device 202 may display the information.
The map display device 100 receives information transmitted from the mobile terminal device 202 or the sensor 203 via the Internet 940, for example.

FIG. 4 is a block configuration diagram showing an example of a functional block configuration of the map display device 100 according to this embodiment.
The map display device 100 includes a scale input unit 111, a center input unit 112, a map acquisition unit 120, an aggregated graphic setting unit 130, a display target database storage unit 140, an aggregated graphic drawing unit 150, an individual graphic drawing unit 160, and an icon storage unit 170. A map display unit 180 and a display target database update unit 190.

The scale input unit 111 inputs the scale of the map to be displayed using an input device such as a mouse 903. The scale is expressed by a fraction such as “one thousandth of a thousand” or “one half of a hundred thousand”. The larger the denominator (the smaller the scale), the wider the map, and the smaller the denominator (the scale is smaller). A larger map represents a detailed map of a narrow area.
For example, the user designates the scale of the map displayed by the map display unit 180 by operating a scroll bar indicating the scale displayed by the map display unit 180 in the vicinity of the map. The scale input unit 111 calculates a scale specified by the user using a processing device such as the CPU 911.
The scale input unit 113 stores scale data using a storage device such as the magnetic disk device 920. The scale data is data indicating the scale input by the scale input unit 113.

The center input unit 112 inputs the center coordinates of the map to be displayed using an input device such as a mouse 903. The center coordinates indicate the coordinates of the center point of the map displayed by the map display unit 180, and are represented by the latitude of the center point and the longitude of the center point, for example.
For example, the user clicks one point on the map displayed by the map display unit 180 to specify the clicked point as the center point of the map to be displayed. The center input unit 112 uses a processing device such as the CPU 911 to calculate center coordinates corresponding to the position on the screen clicked by the user.
The center input unit 112 stores the center data using a storage device such as the magnetic disk device 920. The center data is data indicating the center coordinates input by the center input unit 112.

The map acquisition unit 120 inputs scale data stored in the scale input unit 111 and center data stored in the center input unit 112 using a processing device such as the CPU 911.
The map acquisition unit 120 calculates a display area of the map displayed by the map display unit 180 based on the coordinates of the center point indicated by the center data and the scale indicated by the scale data, using a processing device such as the CPU 911. For example, when the display area is rectangular, the map acquisition unit 120 calculates the display area by obtaining the latitude and longitude of the four corners of the display area.
The map acquisition unit 120 uses a processing device such as the CPU 911 to generate a map representing the calculated display area.
For example, the map acquisition unit 120 stores map information data using a storage device such as the magnetic disk device 920, and generates a map based on the stored map information data using a processing device such as the CPU 911. To do. The map information data is data that is a source of a map to be displayed, and is, for example, map image data or vector data indicating terrain, administrative boundaries, roads, buildings, and the like.
The map acquisition unit 120 stores map data using a storage device such as the magnetic disk device 920. The map data is data indicating a map generated by the map acquisition unit 120.

Note that the map acquisition unit 120 does not generate a map, but, for example, uses the communication device 915 to transmit scale data and center data to the map information providing server device 201, and the map information providing server device 201 The map may be acquired by receiving map data indicating the generated map using the communication device 915.
This saves the trouble of updating the map information data stored in the map display device 100 and is preferable because a map based on the latest information can always be displayed. Thereby, the maintenance cost of the map display apparatus 100 can also be reduced.

  The display target database storage unit 140 stores a database in which information about display targets to be displayed on the map displayed by the map display unit 180 is collected using a storage device such as the magnetic disk device 920.

  The database stored in the display target database storage unit 140 includes, for example, information such as the building number of the building 803 to be displayed, the building name, the latitude / longitude of the point where the building is located, the disaster occurrence time, the type of damage, and the recovery time. Including.

  The disaster occurrence time is the time when the sensor 203 installed in the building 803 detects the occurrence of the disaster when the disaster occurs. When the sensor 203 detects the occurrence of a disaster, information notifying the fact is transmitted to the map display device 100. The map display apparatus 100 receives this and reflects it in the database stored in the display target database storage unit 140.

The type of damage indicates what kind of damage has occurred in the building 803 when a disaster occurs. For example, “Power outage” indicating that the building 803 has failed, “Water damage” indicating that the building 803 has been submerged, “Stop” indicating that the elevator has been automatically stopped upon detection of an earthquake, and the elevator has failed. There is a “failure” that indicates that the vehicle has stopped moving, and a “requires rescue” that indicates that a person is trapped in the stopped elevator.
This is also detected by the sensor 203 installed in the building 803, transmits disaster information indicating the detected damage status to the map display device 100, and the map display device 100 receives the disaster information transmitted by the sensor 203. And reflected in the database stored in the display target database storage unit 140.

Depending on the type of disaster, there are cases where an immediate response is needed immediately and cases where it is not. For example, in the case of “require rescue”, an emergency response is required immediately.
In the event of a disaster such as an earthquake, damage will occur simultaneously in many buildings in the same area, so there will be a shortage of workers for emergency response. Therefore, it is necessary to determine the priority order according to the necessity of emergency response and take action.

  The recovery time is the time when the worker 802 who responds urgently arrives at the site and completes the response. The worker 802 inputs the completion of the recovery to the portable terminal device 202 after the emergency response is completed. The mobile terminal device 202 transmits recovery information indicating the completion of recovery to the map display device 100, the map display device 100 receives the recovery information transmitted by the mobile terminal device 202, and the display target database storage unit 140 stores the recovery information. To be reflected in the database.

  The display target database storage unit 140 includes a position storage unit 141, an emergency level storage unit 142, and a state storage unit 143.

The position storage unit 141 stores position data using a storage device such as the magnetic disk device 920. The position data is data indicating the position to be displayed. For example, it includes latitude data indicating the latitude of a point to be displayed, longitude data indicating longitude, and the like. In the example described above, information indicating the latitude and longitude of a point where the building 803 is located corresponds to the position data.
In the case of a display target that does not move like a building, the position storage unit 141 stores position data input in advance. However, the display target may be moved. In that case, for example, the position of the display target may be measured by GPS (Global Positioning System), transmitted to the map display device 100, and stored in the position storage unit 141.

  The urgency storage unit 142 stores urgency data using a storage device such as the magnetic disk device 920. Urgency data is data indicating the necessity of emergency response. In the example described above, information indicating the type of disaster corresponds to urgency data.

  The state storage unit 143 stores state data using a storage device such as the magnetic disk device 920. The state data is data indicating the state of the display target. For example, it includes data indicating whether the display target has been damaged or not, and has been restored. In the example described above, information indicating the disaster occurrence time / recovery time corresponds to the state data.

The display target database update unit 190 updates the database stored in the display target database storage unit 140 using a processing device such as the CPU 911.
For example, the display target database update unit 190 may update the database stored in the display target database storage unit 140 each time information is received from the sensor 203 or the like installed at the site, or the update information may be updated for a certain period. It may be stored and updated at a predetermined cycle.

The aggregate graphic setting unit 130 sets an aggregate graphic (aggregate icon) to be displayed on the map displayed by the map display unit 180 using a processing device such as the CPU 911.
The aggregated graphic is that when the scale of the map displayed by the map display unit 180 is small (a wide area map), when icons corresponding to individual display objects are displayed, the icons are overlapped and visibility is deteriorated. Since it takes time to display when the number of objects is large, a plurality of icons are displayed together.
In this embodiment, mesh-shaped divided areas divided by latitude and meridians are provided, and aggregated figures corresponding to the number of display objects existing in each divided area are displayed.
The aggregate graphic setting unit 130 is also referred to as an icon pasting calculation unit.

  The aggregate graphic setting unit 130 includes a scale level calculation unit 131, a scale level storage unit 132, a total execution determination unit 133, a total region calculation unit 134, a total region storage unit 135, a region division unit 136, a target number total unit 137, and an aggregate graphic. A selection unit 138 and a selected figure storage unit 139 are provided.

The scale level calculation unit 131 inputs scale data stored by the scale input unit 111 using a processing device such as the CPU 911.
The scale level calculation unit 131 uses a processing device such as the CPU 911 to calculate a scale level based on the scale indicated by the input scale data.
The scale level refers to whether the map displayed by the map display unit 180 is a wide area map such as a full map of Japan or a local map, a mid-range map such as a prefecture map or a city map, or a residential map. Whether the map is a detailed map as shown in FIG.
For example, if the scale is less than 1 / 500,000, the scale level is “0”. If the scale is less than 1 / 500,000 and less than 1 / 300,000, the scale level is “1”, 1 / 300,000 or more. Scale level “2” if less than 1 / 30,000, scale level “3” if less than 1 / 30,000 to 1 / 10,000, 1 / 10,000 or less than 1/500 A scale level corresponding to the scale of the map displayed by the map display unit 180 is determined, such as a scale level “4” and a scale level “5” if it is 1/500 or more. In this embodiment, the scale level is assumed to increase as the scale increases. The scale level is not limited to six levels, and may be more or less. The scale level threshold value may be a fixed value set in advance or may be changed by the user according to his / her preference.
The scale level calculation unit 131 stores a predetermined threshold (or input by a user) using a storage device such as the magnetic disk device 920, and inputs scale data input using a processing device such as the CPU 911. Is compared with a threshold value to calculate a scale level.
The scale level calculation unit 131 outputs scale level data using a processing device such as the CPU 911. The scale level data is data indicating the scale level calculated by the scale level calculation unit 131.

The scale level storage unit 132 receives the scale level data output from the scale level calculation unit 131 using a processing device such as the CPU 911.
The scale level storage unit 132 stores the input scale level data using a storage device such as the RAM 914.
Accordingly, the scale level storage unit 132 stores data indicating the scale level calculated by the scale level calculation unit 131.

The aggregation execution determination unit 133 determines whether to execute the aggregation processing using a processing device such as the CPU 911.
The aggregation execution determination unit 133 inputs the old scale level data stored by the scale level storage unit 132 using a processing device such as the CPU 911 before the scale level storage unit 132 stores new scale level data.
The aggregation execution determination unit 133 inputs new scale level data output from the scale level calculation unit 131 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 compares the old scale level data with the new scale level data using a processing device such as the CPU 911 and determines whether or not the scale level has been changed.
When it is determined that the scale level has been changed, the aggregation execution determination unit 133 determines that the aggregation process is executed using a processing device such as the CPU 911.
Here, “aggregation process execution and determination” is to determine that the aggregation process is to be executed.
Note that even when the scale level storage unit 132 does not store old scale level data, that is, when the map display device 100 is in a state where the map display device 100 has not yet displayed a map immediately after startup, the aggregation execution determination unit 133 also It is determined that the aggregation process is executed.

  When there are thousands or tens of thousands of display objects, the processing time required for the aggregation process for aggregating the number of display objects in the divided area for the aggregate display cannot be ignored. Therefore, in this embodiment, when there is no change in the scale level, aggregation processing is not performed, and aggregation display is performed using the previous aggregation result.

  In this embodiment, as will be described later, when the scale level is higher than a predetermined scale level, the aggregated display is not performed. Therefore, when the scale level is larger than the predetermined scale level, the aggregation execution determination unit 133 determines that the aggregation process is not executed even if the scale level is changed.

The total area calculation unit 134 calculates the total area using a processing device such as the CPU 911 when the total execution determination unit 133 determines that the total process is executed. The total area is an area where the number of display objects is totaled. The total area is divided into a plurality of divided areas, and for each divided area, the number of display objects located in the area is totaled.
The total area includes the display area of the map displayed by the map display unit 180 and is wider than the display area.
This is because when the user does not change the scale of the map and moves the center point (that is, when the map is scrolled), it is not necessary to perform the counting process.

The total area calculation unit 134 inputs (new) scale level data stored in the scale level storage unit 132 using a processing device such as the CPU 911.
The total area calculation unit 134 calculates the size of the total area based on the scale level indicated by the input scale level data using a processing device such as the CPU 911.
For example, when the scale level is “0”, a range of a latitude difference of 10 degrees and a longitude difference of 10 degrees is set as the total area. When the scale level is “1”, the range of the latitude difference of 2 degrees and the longitude difference of 2 degrees is set as the total area. When the scale level is “2”, a range having a latitude difference of 0.4 degrees and a longitude difference of 0.4 degrees is set as the total area. When the scale level is “3” or more, since the aggregation execution determination unit 133 determines that the aggregation process is not performed, the aggregation region calculation unit 134 does not calculate the aggregation region.

The total area calculation unit 134 inputs the central data stored in the central input unit 112 using a processing device such as the CPU 911.
The total area calculation unit 134 calculates the total area based on the coordinates of the center point indicated by the input center data and the calculated area of the total area.
For example, when the scale level is “1” or “2”, a range having a calculated area centered on the center point is set as the total area. When the scale level is “0”, regardless of the position of the center point, the range from 130 degrees to 140 degrees east longitude and 25 degrees to 35 degrees north latitude is set as the total area.

The total area calculation unit 134 outputs the total area data using a processing device such as the CPU 911. The total area data is data indicating the total area calculated by the total area calculation unit 134.
In this embodiment, an area surrounded by two meridians and two latitudes is defined as a total area. Therefore, the aggregate area data includes, for example, east-end longitude data indicating the longitude of the east end meridian that is the eastern boundary of the aggregate area, west-end longitude data indicating the longitude of the west end meridian that is the west boundary of the aggregate area, North-end latitude data indicating the latitude of the northernmost latitude line, which is the northern boundary of the total area, and south-end latitude data indicating the latitude of the southern edge, which is the southern boundary of the total area, are included.

  The shape of the total area may be different from the shape surrounded by the two meridians and the two latitudes. For example, a circular area centered on the center point may be set as the total area. In addition, the total area may be fixed regardless of the center point or scale, or may be the entire range where the display target can be located (for example, all over Japan). When the total area is fixed, the total area calculation unit 134 may not be provided.

The total area storage unit 135 inputs the total area data output from the total area calculation unit 134 using a processing device such as the CPU 911.
The total area storage unit 135 stores the input total area data using a storage device such as the magnetic disk device 920.

The area dividing unit 136 divides the total area into a plurality of divided areas using a processing device such as the CPU 911. The divided area is an area that is a unit for counting the number of display objects located therein.
For example, the area dividing unit 136 divides the tabulated area into 100 equal parts in the east and west and 100 parts in the north and south, and divides it into 10,000 divided areas. The number of divisions may be more or less, or may be variable. When the division number is variable, the area dividing unit 136 may calculate the division number based on the scale level stored in the scale level storage unit 132. Alternatively, the user may input a desired number of divisions, and the area dividing unit 136 may store them using a storage device such as the magnetic disk device 920. Further, the shape of the divided regions may not be a mesh shape, and the width of each divided region may not be the same. For example, an area close to the center point may be divided finely, and an area far from the center point may be divided roughly.

The area dividing unit 136 inputs the total area data output from the total area calculation unit 134 using a processing device such as the CPU 911.
The area dividing unit 136 divides the total area indicated by the input total area data into a plurality of divided areas using a processing device such as the CPU 911.
The area dividing unit 136 outputs divided area data using a processing device such as the CPU 911. The divided area data is data indicating a divided area divided by the area dividing unit 136. The divided area data includes, for example, divided longitude data indicating longitudes of meridians serving as boundaries of the divided areas, divided latitude data indicating latitudes of latitudes serving as the boundaries of the divided areas, and the like. Alternatively, only the division number data indicating the division number may be included.

FIG. 5 is a diagram showing an example of the relationship between the display area, the total area, and the divided area in this embodiment.
A display area 501 is a portion surrounded by a central thick frame. The map display unit 180 displays a map representing the display area 501.
The total area 510 is the entire broken line mesh shape. In this example, the total area 510 is centered on the center point of the display area 501, includes the display area 501, and is wider than the display area 501.
The divided area 511 is a small square portion surrounded by a broken line. In this example, the total area 510 is divided into 10 equal parts in the east and west and 10 parts in the north and south, and is divided into a total of 100 divided areas 511.

  Returning to FIG. 4, the description of the functional blocks of the map display device 100 is continued.

The target number counting unit 137 uses the processing device such as the CPU 911 for each of the plurality of divided areas divided by the area dividing unit 136 to total the number of display objects located in the area.
It should be noted that the display targets to be totaled by the target number counting unit 137 may be all display targets stored by the display target database storage unit 140 or may be display targets that satisfy a specific condition. In the following description, a case will be described in which the number of display objects is totalized for a damaged building on the condition that it is a damaged building.

The target number totalization unit 137 inputs the total area data stored in the total area storage unit 135 using a processing device such as the CPU 911.
The target count totaling unit 137 uses a processing device such as the CPU 911 to secure a storage area for storing the same number of display targets as the number of divided areas on a storage device such as the magnetic disk device 920. The target number counting unit 137 generates, for example, a 100 × 100 array.
The target number counting unit 137 initializes all the display target numbers to zero using a processing device such as the CPU 911.

The target number totaling unit 137 uses a processing device such as the CPU 911 to input the position data stored in the position storage unit 141 and the state data stored in the state storage unit 143 for one display target.
When the input state data indicates “damaged”, the target number totaling unit 137 uses a processing device such as the CPU 911 to determine whether the geographical position indicated by the input position data is within the total area. .
The case where the state data indicates “stricken” is, for example, data indicating that the disaster has occurred such as “power failure” or “water damage”.
For example, the target number counting unit 137 has a longitude indicated by the longitude data included in the position data equal to or less than the longitude indicated by the east end longitude data included in the total area data, and is equal to or greater than the longitude indicated by the west end longitude data included in the total area data. And the latitude indicated by the latitude data included in the position data is less than or equal to the latitude indicated by the northernmost latitude data included in the aggregated region data and greater than or equal to the latitude indicated by the southernmost latitude data included in the aggregated region data. The target number counting unit 137 determines that it is within the counting area.
When determining that the target number is within the total area, the target number totaling unit 137 uses a processing device such as the CPU 911 to calculate a divided area where the display target is located, and increases the number of objects corresponding to the calculated divided area by one.
By repeating the above for all display targets, the target number counting unit 137 counts the number of display targets.

  The target number counting unit 137 outputs target number data using a processing device such as the CPU 911. The target number data is data indicating the number of display targets totaled by the target number totaling unit 137. Note that the target number totaling unit 137 indicates data (reference, pointer, address, file name, etc.) indicating a storage area such as an array storing the number of display targets totaled by the target number totaling unit 137 instead of the target number data. It may be.

  The aggregated graphic selection unit 138 uses a processing device such as the CPU 911 for each of the divided areas divided by the area dividing unit 136, and the aggregated graphic (aggregated icon) corresponding to the number of display objects totaled by the target number totaling unit 137. Select.

FIG. 6 is a diagram showing an example of an aggregate graphic selected by the aggregate graphic selection unit 138 in this embodiment.
When the number of display objects in the area is 0, the aggregated graphic selection unit 138 does not select the aggregated graphic. That is, the aggregated graphic is not displayed at the position corresponding to the area.
When the number of display objects in the area is 1 or more and less than a predetermined threshold (21 in this example), the aggregated graphic selection unit 138 selects an aggregated graphic (aggregated icon 1) when the number of display objects is small. .
When the number of display objects in the area is equal to or greater than a predetermined threshold value and less than the second threshold value (51 in this example), the aggregate graphic selection unit 138 displays an aggregate graphic (aggregation icon) when the number of display objects is intermediate. 2) is selected.
When the number of display objects in the area is equal to or greater than the second threshold, the aggregate graphic selection unit 138 selects an aggregate graphic (aggregation icon 3) when the number of display objects is large.
In this example, the aggregated figures are all conical, and the higher the number of display objects, the higher the height of the cone, so that the user can intuitively grasp the number of display objects located in that area. I have to.
Note that the threshold value is not fixed, and may be configured to change according to the user's preference.
Different thresholds may be used depending on the scale level. If the scale level is increased, the area of the divided area is reduced, and therefore the number of display objects located in one divided area is reduced. Therefore, it is preferable to decrease the threshold when the scale level is large, and increase the threshold when the scale level is small.
Furthermore, the aggregated graphic to be displayed may be changed according to the scale level. In particular, when the threshold value is changed according to the scale level, it is preferable to change the aggregate graphic because the user can intuitively grasp the number of display objects located in the area. This is because if the same aggregated graphic is displayed even if the threshold value changes, the user may misunderstand that the number of display objects located in the area is the same.

  Returning to FIG. 4, the description of the functional blocks of the map display device 100 is continued.

The aggregated graphic selection unit 138 outputs selected graphic data for each of the divided areas divided by the area dividing unit 136 using a processing device such as the CPU 911. The selected graphic data is data indicating the aggregate graphic selected by the aggregate graphic selection unit 138. For example, the graphic name and number of the selected aggregate graphic, the file name of the file storing the image data of the aggregate graphic, and the like. Alternatively, the image data itself of the selected aggregate graphic may be used.
In addition, since the number of aggregated graphics selected by the aggregated graphic selecting unit 138 is the same as the number of divided areas divided by the area dividing unit 136, as with the number of display objects totaled by the target number totalizing unit 137, for example, the aggregated graphic selection The unit 138 generates a 100 × 100 array using a storage device such as the magnetic disk device 920, stores the selected figure data, and data (reference, pointer, address, file) indicating the array (storage area) Name etc.) may be output.

The selected figure storage unit 139 inputs the selected figure data output from the aggregated figure selection unit 138 using a processing device such as the CPU 911.
The selected figure storage unit 139 stores input selected figure data using a storage device such as the magnetic disk device 920.
The selected figure data stored in the selected figure storage unit 139 is updated when the aggregation execution determination unit 133 determines that the aggregation process is executed and the aggregation figure setting unit 130 performs the aggregation process. When the aggregation execution determination unit 133 determines not to execute the aggregation process, the selection graphic storage unit 139 holds selected graphic data based on the previous aggregation result.

  The icon storage unit 170 stores a plurality of graphic data such as aggregated graphics (aggregated icons) and individual graphics (individual icons) using a storage device such as the magnetic disk device 920. The individual graphic is a graphic indicating an individual display object, and is displayed by the map display unit 180 when the scale of the map to be displayed is large and the aggregate display is not performed.

  The aggregated graphic drawing unit 150 generates an aggregated display diagram using a processing device such as the CPU 911. The aggregate display diagram is a diagram showing the same area as the display area of the map acquired by the map acquisition unit 120 and is a diagram in which an aggregate graphic is drawn at a position corresponding to the divided area. When the map display unit 180 displays the aggregated display diagram on the map acquired by the map acquisition unit 120, the user understands which divided area the displayed aggregated graphic is for.

The aggregated graphic drawing unit 150 performs initialization processing using a processing device such as the CPU 911 and prepares data indicating an undrawn (transparent) aggregated display diagram.
The aggregated graphic drawing unit 150 uses the processing device such as the CPU 911 to select the selected graphic stored in the selected graphic storage unit 139 for each of the divided areas that overlap the display area among the divided areas divided by the area dividing unit 136. Enter the data.
The aggregated graphic drawing unit 150 inputs graphic data, which is an aggregated graphic indicated by the selected selected graphic data, from among a plurality of graphic data stored in the icon storage unit 170 using a processing device such as the CPU 911.
The aggregated graphic drawing unit 150 uses the processing device such as the CPU 911 to draw the aggregated graphic indicated by the input graphic data on the aggregated display diagram at a position on the diagram corresponding to the geographical position of the divided area. . The position on the figure corresponding to the geographical position of the divided area is, for example, a position representing the geographical position of the center point of the divided area on the map acquired by the map acquisition unit 120.
By repeating the above for all the divided areas that overlap the display area, the aggregated graphic drawing unit 150 generates an aggregated display diagram.
The aggregated graphic drawing unit 150 stores aggregated display diagram data using a storage device such as the magnetic disk device 920. The aggregate display diagram data is data indicating the aggregate display diagram generated by the aggregate graphic drawing unit 150.

  In this embodiment, when the scale level is higher than a predetermined level, the collective display is not performed. Therefore, when the scale level stored in the scale level storage unit 132 is smaller than the predetermined scale level, the aggregated graphic drawing unit 150 performs the above processing, and the scale level stored in the scale level storage unit 132 is the predetermined scale level. If it is larger, the above processing is not performed.

  The individual figure drawing unit 160 generates an individual display diagram using a processing device such as the CPU 911. The individual display diagram is a diagram representing the same area as the display area of the map acquired by the map acquisition unit 120, and is a figure in which an individual figure is drawn at a position corresponding to a display target. When the map display unit 180 displays the individual display diagram on the map acquired by the map acquisition unit 120, the user can know the exact position of the display target.

  In this embodiment, when the scale level is smaller than a predetermined level, the aggregate display is performed and the individual display is not performed. Therefore, the individual figure drawing unit 160 performs the following processing when the scale level stored in the scale level storage unit 132 is larger than a predetermined scale level.

  The individual figure drawing unit 160 performs initialization processing using a processing device such as the CPU 911 and prepares data indicating an individual display diagram on which nothing is drawn (transparent).

The individual figure drawing unit 160 uses a processing device such as the CPU 911 to input the position data stored in the position storage unit 141 and the state data stored in the state storage unit 143 for one display target.
When the input state data indicates “disaster”, the individual figure drawing unit 160 uses a processing device such as the CPU 911 to determine whether the geographical position indicated by the input position data is within the display area. .
When it is determined that the individual graphic drawing unit 160 is within the display area, the individual graphic drawing unit 160 is an individual graphic corresponding to a display target from among a plurality of graphic data stored in the icon storage unit 170 using a processing device such as the CPU 911. Enter graphic data.
The individual graphic drawing unit 160 uses a processing device such as the CPU 911 to draw the individual graphic indicated by the input graphic data at a position on the diagram corresponding to the geographical position indicated by the position data.
By repeating the above for all display objects, the individual figure drawing unit 160 generates an individual display diagram.
The individual figure drawing unit 160 stores individual display diagram data using a storage device such as the magnetic disk device 920. The individual display diagram data is data indicating an individual display diagram generated by the individual figure drawing unit 160.

  The map display unit 180 displays a display map using a display device 901 such as a CRT. The display map is obtained by superimposing the aggregate display diagram generated by the aggregate graphic drawing unit 150 and the individual display diagram generated by the individual graphic drawing unit 160 on the map acquired by the map acquisition unit 120.

When the scale level stored in the scale level storage unit 132 is smaller than the predetermined scale level, the map display unit 180 displays the aggregated display diagram generated by the aggregated graphic drawing unit 150 on the map acquired by the map acquisition unit 120. To create a display map.
That is, the map display unit 180 inputs map data stored in the map acquisition unit 120 and aggregated display diagram data stored in the aggregated graphic drawing unit 150 using a processing device such as the CPU 911.
The map display unit 180 uses a processing device such as the CPU 911 to perform a process of superimposing the aggregate display diagram indicated by the input aggregate display diagram data on the map indicated by the input map data, thereby generating a display map. .
The map display unit 180 displays the generated display map using a display device 901 such as a CRT.

When the scale level stored in the scale level storage unit 132 is larger than the predetermined scale level, the map display unit 180 generates an individual display diagram generated by the individual figure drawing unit 160 on the map acquired by the map acquisition unit 120. To create a display map.
The detailed contents of the display map generation are the same as those in the case where the aggregated display diagrams are superimposed, and thus the description thereof is omitted.

FIG. 7 is a diagram showing an example of a display map displayed by the map display unit 180 in this embodiment.
The target number data 637 is target number data indicating the number of display targets totaled by the target number totaling unit 137. The object number totaling unit 137 totals the number of display objects located in each of the divided regions (10 × 10 = 100 in this example) divided by the region dividing unit 136.
The selected figure data 638 is selected figure data indicating the aggregate figure selected by the aggregate figure selection unit 138. The aggregate graphic selection unit 138 selects an aggregate graphic for each of the divided areas divided by the area division unit 136. In this example, the number of the aggregated graphic selected as the selected graphic data 638 is used. Of the selected figure data 638, a portion corresponding to the display area is indicated by a thick frame.

The aggregate display diagram 650 is an aggregate display diagram generated by the aggregate graphic drawing unit 150.
A map 620 is a map acquired by the map acquisition unit 120.
The display map 680 is a display map generated by the map display unit 180 by superimposing the aggregated display diagram 650 on the map 620. The map display unit 180 displays a display map 680 using a display device 901 such as a CRT.

  Next, the operation will be described.

  FIG. 8 is a flowchart showing an example of the flow of map display processing in which the map display device 100 in this embodiment displays a display map.

In S <b> 11, the scale input unit 111 inputs the scale of the map to be displayed using an input device such as a mouse 903.
The scale input unit 111 stores scale data indicating the input scale using a storage device such as the magnetic disk device 920.

In S12, the center input unit 112 inputs the center coordinates of the map to be displayed using an input device such as a mouse 903.
The center input unit 112 stores center data indicating the input center coordinates using a storage device such as the magnetic disk device 920.

In S13, the map acquisition unit 120 inputs the scale data stored in the scale input unit 111 in S11 using a processing device such as the CPU 911.
The map acquisition unit 120 inputs the center data stored in the center input unit 112 in S12 using a processing device such as the CPU 911.
The map acquisition unit 120 uses a processing device such as the CPU 911 to acquire a map having a scale indicated by the input scale data and representing a display area centered on the point of the center coordinates indicated by the input center data.
The map acquisition unit 120 stores map data indicating the acquired map using a storage device such as the magnetic disk device 920.

In S14, the scale level calculation unit 131 inputs the scale data stored in the scale input unit 111 in S11 using a processing device such as the CPU 911.
The scale level calculation unit 131 uses a processing device such as the CPU 911 to calculate a scale level based on the scale indicated by the input scale data.
The scale level calculation unit 131 outputs scale level data indicating the calculated scale level using a processing device such as the CPU 911.

In S15, the aggregation execution determination unit 133 inputs the scale level data stored in the scale level storage unit 132 using a processing device such as the CPU 911.
At this time, since the scale level storage unit 132 has not yet stored the scale level data output by the scale level calculation unit 131 in S14, the scale level storage unit 132 stores the scale level stored in the previous map display process. I remember the data. Hereinafter, this is referred to as “scale level data before update”, and the (old) scale level indicated by the scale level data before update is referred to as “scale level before update”. On the other hand, the (new) scale level calculated by the scale level calculation unit 131 in this map display process is called “updated scale level”, and the data indicating the updated scale level is called “updated scale level data”. Distinguish between the two.
The aggregation execution determination unit 133 inputs the updated scale level data output from the scale level calculation unit 131 using a processing device such as the CPU 911.
Similarly, the scale level storage unit 132 receives the updated scale level data output from the scale level calculation unit 131 using a processing device such as the CPU 911.
The scale level storage unit 132 stores the input post-update scale level data using a storage device such as the magnetic disk device 920.
The aggregation execution determining unit 133 compares the updated scale level indicated by the input updated scale level data with a predetermined scale level, and determines which is larger.
If it is determined that the updated scale level is greater than the predetermined scale level, the process proceeds to S16.
If it is determined that the post-update scale level is smaller than the predetermined scale level, the process proceeds to S17.

In S <b> 16, the individual graphic drawing unit 160 generates an individual display diagram using a processing device such as the CPU 911.
The individual figure drawing unit 160 stores individual display diagram data indicating the generated individual display diagram using a storage device such as the magnetic disk device 920.
Thereafter, the process proceeds to S25.

In S <b> 17, the aggregation execution determining unit 133 uses a processing device such as the CPU 911 and the post-update scale level indicated by the post-update scale level data input in S <b> 15 and the pre-update scale shown by the pre-update scale level data input in S <b> 15. Compare with the level to determine if the scale level has changed.
If it is determined that the scale level has been changed, the process proceeds to S18.
If it is determined that there is no change in the scale level, the process proceeds to S24.

  In S <b> 18, the aggregation execution determination unit 133 determines that the aggregation process is executed using a processing device such as the CPU 911.

In S19, the total area calculation unit 134 inputs the scale level data stored in the scale level storage unit 132 in S15 using a processing device such as the CPU 911.
The total area calculation unit 134 calculates the size of the total area based on the scale level indicated by the input scale level data using a processing device such as the CPU 911.
The total area calculation unit 134 inputs the central data stored in the central input unit 112 in S12 using a processing device such as the CPU 911.
The total area calculation unit 134 calculates a total area using a processing device such as the CPU 911 based on the center coordinates indicated by the input center data and the calculated area of the total area.
The total area calculation unit 134 outputs total area data indicating the calculated total area using a processing device such as the CPU 911.
The total area storage unit 135 inputs the total area data output from the total area calculation unit 134 using a processing device such as the CPU 911.
The total area storage unit 135 stores the input total area data using a storage device such as the magnetic disk device 920.

In S20, the area dividing unit 136 inputs the total area data output from the total area calculating unit 134 in S19 using a processing device such as the CPU 911.
The area dividing unit 136 divides the input total area data into a plurality of divided areas using a processing device such as the CPU 911.
The area dividing unit 136 outputs divided area data indicating the divided areas by using a processing device such as the CPU 911.

In S21, the target number totalization unit 137 uses the processing device such as the CPU 911 to input the total area data output by the total area calculation unit 134 in S19.
The target number totalization unit 137 uses the processing device such as the CPU 911 to input the divided region data output by the region dividing unit 136 in S20.
The target number totalization unit 137 inputs data (position data, status data, etc.) regarding the display target stored in the display target database storage unit 140 using a processing device such as the CPU 911.
The target number counting unit 137 uses a processing device such as the CPU 911, among the input data, the status data indicates “stricken”, and the geographical position indicated by the position data indicates the total area indicated by the input total area data. The data about the display target that is within is extracted.
The object count totaling unit 137 uses a processing device such as the CPU 911 to determine which divided area of the divided areas indicated by the input divided area data the geographical position indicated by the position data is within the extracted display object. And the number of display objects located in the divided area is totaled.
The target number totaling unit 137 uses a processing device such as the CPU 911 to output target number data indicating the total number of display targets for each of the divided areas divided by the area dividing unit 136 in S20.

In S22, the aggregated graphic selection unit 138 uses the processing device such as the CPU 911 to input the target number data output by the target number totaling unit 137 in S21 for each of the divided areas divided by the area dividing unit 136 in S20. .
The aggregated graphic selection unit 138 uses a processing device such as the CPU 911 to select among the plurality of aggregated graphics indicated by the plurality of graphic data stored in the icon storage unit 170 for each of the divided areas divided by the area dividing unit 136 in S20. The aggregate figure corresponding to the input target number data is selected.
The aggregated graphic selection unit 138 uses a processing device such as the CPU 911 to output selected graphic data indicating the selected aggregated graphic for each of the divided areas divided by the area dividing unit 136 in S20.

In S23, the selected figure storage unit 139 inputs the selected figure data output from the aggregated figure selection unit 138 in S22 for each of the divided areas divided by the area division unit 136 in S20 using a processing device such as the CPU 911. .
The selected figure storage unit 139 stores input selected figure data for each of the divided areas divided by the area dividing unit 136 in S20 using a storage device such as the magnetic disk device 920.

In S <b> 24, the aggregated graphic drawing unit 150 uses the processing device such as the CPU 911 to input selected graphic data for a divided area that overlaps the display area among the selected graphic data stored in the selected graphic storage unit 139.
The aggregated graphic drawing unit 150 inputs graphic data indicated by the selected selected graphic data from the graphic data stored in the icon storage unit 170 for each of the divided areas overlapping the display area, using a processing device such as the CPU 911. To do.
The aggregated graphic drawing unit 150 draws the aggregated graphic indicated by the input graphic data for each of the divided areas overlapping the display area on a single aggregated display diagram using a processing device such as the CPU 911, and displays the aggregated display diagram. Is generated.
The aggregated graphic drawing unit 150 stores aggregated display diagram data indicating the generated aggregated display diagram using a storage device such as the magnetic disk device 920.

In S25, the map display unit 180 inputs the map data stored by the map acquisition unit 120 in S13 using a processing device such as the CPU 911.
The map display unit 180 uses a processing device such as the CPU 911 to display either the individual display diagram data stored in the individual graphic drawing unit 160 in S16 or the aggregated display diagram data stored in the integrated graphic drawing unit 150 in S24. input.
The map display unit 180 uses a processing device such as the CPU 911 to display the individual display diagram indicated by the input individual display diagram data and the aggregate display indicated by the input aggregate display diagram data on the map indicated by the input map data. A display map is generated by superimposing any of the figures.
The map display unit 180 displays the generated display map using a display device 901 such as a CRT.

  In the map display process described with reference to FIG. 7, the “total number of display objects” process in step S <b> 21 is to extract and total those whose status data is “stricken”. As described above, when the status data is “damaged”, it indicates that there has been a disaster such as “power failure” or “water damage”. Further, “power outage”, “water damage”, and the like that specifically indicate the contents of the disaster are stored in the state data, and the processing of step S21 is configured only for the state data “power outage”. Is possible. In that case, a processing device such as a CPU 911 is used to accept specification of status data from a user such as a controller, and the display device 901, keyboard 902, and mouse 903 are used to specify the status data. The status data is the target of the “total number of display objects” process. As a result, it is possible to grasp the state of specific disaster contents.

  Note that the map display process may be executed when an event occurs such as a user performing an operation to change the scale of the display map.

  Next, how the map display device 100 in this embodiment operates in response to a user's operation by having the above-described configuration will be described.

FIG. 9 is a diagram showing an example of the relationship between the operation by the user and the operation of the map display device 100 in this embodiment.
In this figure, an ellipse indicates a user operation. The thin line rectangle indicates the operation of the map display device 100. A thick square indicates a display map displayed by the map display unit 180 using a display device 901 such as a CRT.

First, when the user turns on the power of the map display device 100 and starts up the map display device 100, the map display device 100 displays a display map of the scale determined by the initial setting and the center point determined by the initial setting. indicate. If the initial scale is a scale that should be aggregated, the map display device 100 executes the aggregation process prior to display.
The time from when the map display device 100 is activated until the display of the display map is completed includes the time taken to execute the aggregation process and the time taken to generate the aggregated display diagram.
On the other hand, when the individual display is performed for the same display area, the time until the display of the display map is completed includes the time taken to generate the individual display diagram.

  Comparing the time taken to generate the consolidated display diagram and the time taken to generate the individual display diagram, the number of figures that need to be drawn is smaller when the aggregate display diagram is generated. The time required to generate the aggregate display diagram is shorter than the time required. Even when the time required for executing the aggregation processing is taken into consideration, the time until the display of the display map is completed is shorter in the case of the aggregate display.

Next, it is assumed that the user performs an operation of moving the center point of the map.
In this case, the map display device 100 does not execute the aggregation process. This is because in the first aggregation process, aggregation is also performed outside the display area, so that it is not necessary to perform aggregation again. Therefore, the time taken to complete the display of the display map includes the time taken to generate the aggregated display diagram, but does not include the time taken to execute the aggregation process. For this reason, it takes only a short time to complete the display of the display map.

Next, it is assumed that the user increases the scale of the map and performs an operation for enlarging the map.
Even if the scale changes, the map display device 100 does not execute the aggregation process if the scale level is within a range that does not change. In this case, on the display screen, the range representing one divided area is increased, and therefore the interval between aggregated figures is increased. Therefore, the time taken to complete the display of the display map includes the time taken to generate the aggregated display diagram, but does not include the time taken to execute the aggregation process. For this reason, it takes only a short time to complete the display of the display map.

  When the user further enlarges the scale of the map and the scale level changes, the map display device 100 executes a totaling process. Therefore, the time taken to complete the display of the display map includes the time taken to execute the aggregation process and the time taken to generate the aggregated display diagram. However, as the scale is increased and the scale level is increased, the total area is narrowed, so the time required for executing the total process can be shortened. For this reason, it takes only a short time to complete the display of the display map.

The map display device 100 in this embodiment is
A storage device such as a magnetic disk device 920 that stores information, a processing device such as a CPU 911 that processes information, a display device 901 such as a CRT that displays information, a display target database storage unit 140, and an aggregated graphic setting unit 130 And an aggregated graphic drawing unit 150 and a map display unit 180.
The display target database storage unit 140
Using a storage device such as a magnetic disk device 920, position data indicating a geographical position of a display target to be displayed on a map is stored.
The aggregate figure setting unit 130
Using a processing device such as the CPU 911, determine whether to execute the aggregation process,
When it is determined that the aggregation processing is to be executed, a processing area such as the CPU 911 is used to divide the aggregation area including the display area to be displayed on the map and wider than the display area into a plurality of divided areas, and divide the plurality of divided areas. For each of the areas, the number of display objects located in the divided area is totaled based on the position data stored in the display target database storage unit 140 using a processing apparatus such as the CPU 911, and the processing apparatus such as the CPU 911 is used. Then, an aggregated figure corresponding to the total number of display objects is selected, and selected figure data indicating the selected aggregated figure is stored using a storage device such as a magnetic disk device 920.
The aggregate graphic drawing unit 150
Using a processing device such as the CPU 911, for each of the plurality of divided areas, the aggregate graphic indicated by the selected graphic data stored by the aggregate graphic setting unit 130 at a position on the diagram corresponding to the geographical position of the divided area is displayed. Drawing is performed to generate an aggregate display diagram.
The map display unit 180
Using a processing device such as the CPU 911, the aggregated display diagram generated by the aggregated graphic drawing unit 150 is superimposed on the map representing the display area to generate a display map, and a display device 901 such as a CRT is used. The generated display map is displayed.

According to the map display device 100 in this embodiment, the aggregation graphic setting unit 130 determines whether or not to execute the aggregation process, and the aggregation process is executed only when it is determined that the aggregation process is executed. There is an effect that the time required for the unit 180 to display the display map can be shortened.
In addition, when the aggregation process is executed, the aggregation graphic setting unit 130 performs the aggregation process in the aggregation area wider than the display area represented by the display map. Even if the display area changes, there is no need to re-execute the counting process, and the time required for the map display unit 180 to display the display map can be shortened.
In addition, when executing the aggregation process, the aggregate graphic setting unit 130 divides the aggregation area into a plurality of divided areas, totals the number of display objects located in the divided areas, and aggregates the display objects. Since the aggregated graphic corresponding to the number of images is selected, the number of graphics to be drawn by the aggregated graphic drawing unit 150 is small, and the time required for the map display unit 180 to display the display map can be shortened. Play.

The map display device 100 in this embodiment further includes:
An input device such as a mouse 903 for inputting information and a scale input unit 111 are provided.
The scale input unit 111 is
A scale of a map to be displayed is input using an input device such as a mouse 903.
The aggregate figure setting unit 130
Using a processing device such as the CPU 911, the scale level is calculated based on the scale input by the scale input unit 111, and the calculated scale level is stored using a storage device such as the magnetic disk device 920. Using the processing device, determine whether the calculated scale level has changed,
When it is determined that the scale level has been changed, it is determined that the aggregation processing is performed using a processing device such as the CPU 911.

  According to the map display device 100 in this embodiment, the aggregated graphic setting unit 130 calculates the scale level based on the scale of the input display map, and determines that the aggregation process is executed when the scale level is changed. Therefore, even when the scale is changed, the scale level does not change if the scale is within a certain range, and the aggregation process is not executed. Therefore, it is possible to reduce the time required for the map display unit 180 to display the display map. There is an effect.

The map display device 100 in this embodiment further includes:
An input device such as a mouse 903 for inputting information, a scale input unit 111, and an individual figure drawing unit 160 are provided.
The scale input unit 111 is
A scale of a map to be displayed is input using an input device such as a mouse 903.
The aggregate figure setting unit 130
A scale level is calculated based on the scale input by the scale input unit 111 using a processing device such as a CPU 911.
The individual figure drawing unit 160
Using a processing device such as the CPU 911, based on the position data stored in the display target database storage unit 140, an individual graphic is drawn at a position on the diagram corresponding to the geographical position indicated by the position data, and displayed individually. A figure is generated.
The map display unit 180
When the scale level calculated by the aggregated figure setting unit 130 is larger than a predetermined scale level, the individual display drawing generated by the individual figure drawing unit 160 on the map representing the display area by using a processing device such as the CPU 911. Are superimposed on each other to generate a display map.

According to the map display device 100 in this embodiment, when the scale level is larger than a predetermined scale level and the display map is a detailed map representing a narrow area, the display is not an aggregated display in which the number of display objects is tabulated. Since individual display in which individual figures corresponding to each display object are drawn is displayed, there is no deterioration in information, and the user can obtain necessary information from the display map displayed by the map display unit 180. Play.
Further, since the individual display is performed only when the display area is small, the number of figures to be drawn by the individual figure drawing unit 160 is small, and the time taken for the map display unit 180 to display the display map can be shortened. There is an effect that can be done.
Further, since the aggregate display and the individual display are automatically switched by simply changing the scale, the user does not need to perform the display switching operation, and the operability is improved.

The map display device 100 in this embodiment further includes:
It has an input device such as a mouse 903 for inputting information, a scale input unit 111, and a center input unit 112.
The scale input unit 111 is
A scale of a map to be displayed is input using an input device such as a mouse 903.
The center input unit 112
The coordinates of the center point of the map to be displayed are input using an input device such as a mouse 903.
The aggregate figure setting unit 130
Using a processing device such as the CPU 911, the scale level is calculated based on the scale input by the scale input unit 111,
If it is determined that the aggregation processing is to be executed, the processing area such as the CPU 911 is used to calculate the area of the aggregation area based on the calculated scale level, and the central input unit 112 uses the processing apparatus such as the CPU 911. The total area is calculated based on the coordinates of the input center point and the calculated area of the total area.

  According to the map display device 100 in this embodiment, the aggregated figure setting unit 130 calculates the size of the total area based on the scale level. Therefore, when the scale level is large, the total area is narrow and when the scale level is small. The tabulation process can be efficiently executed such as increasing the tabulation area, and the time required for the tabulation process can be shortened.

The map display device 100 in this embodiment can be realized by causing a computer to execute a program that causes the computer to function as the map display device 100.
The program in this embodiment is:
It has an input device such as a mouse 903 for inputting information, a storage device such as a magnetic disk device 920 for storing information, a processing device such as a CPU 911 for processing information, and a display device 901 such as a CRT for displaying information. The computer is caused to function as the map display device 100.

  According to the program in this embodiment, the aggregation graphic setting unit 130 determines whether or not to execute the aggregation process, and the aggregation process is executed only when it is determined that the aggregation process is executed. There is an effect that the map display device 100 capable of reducing the time taken to display the display map can be realized by a computer.

  In the map display device 100 described above, when the scale change is performed on the map screen, the scale change event is detected by the aggregate graphic setting unit 130 (icon pasting calculation unit), and the current scale and the current position are acquired. The count range and the number of buildings for the scale are acquired from the setting information, and the number of buildings on the map is acquired from the icon setting information. It is determined whether it is individual display or aggregate display from the scale, and the display icon is determined and pasted on the map.

The map display device 100 described above is characterized in that display objects such as buildings are individually or collectively displayed according to a map scale range.
Switching between the individual display and the consolidated display is automatically performed as the scale is changed.
The individual display is an icon display method in which an icon is displayed on a map with the east longitude north latitude information as it is, and there is no information deterioration.
In the aggregate display, the number of buildings existing within a certain range of east longitude and north latitude is totaled, and the icon type is changed and displayed according to the total value. Aggregate display is an icon display method with information deterioration, but it can represent the number of buildings by changing the type of icon depending on the aggregate value, and it can show that the number of buildings is high, and the visibility is high. There are few omissions.
Further, since the number of icons to be displayed can be reduced, processing at the time of screen update is reduced, and the processing performance of the map display device 100 can be improved. That is, the map display device 100 can display the display map within a time period that does not affect the operability of the user even if the number of display objects to be processed increases.

According to the map display apparatus 100 described above, even if the scale is small, the icons do not overlap each other, so that the convenience and usefulness of the information can be ensured.
Further, instead of determining whether or not the icons overlap each other, the range of the divided area is determined based on the scale, and the aggregation process is executed.
The range of the divided area can be changed by setting, and the coordinate range can be specified step by step according to the scale. Therefore, according to the processing capability of the map display device 100, resources necessary for icon display The balance with the amount of icon information displayed can be finely set.
Thereby, resources required for icon display can be reduced.

When a disaster such as an earthquake occurs, many damages occur simultaneously over a wide area. Therefore, it is necessary for the user of the map display device 100 to be able to easily understand the overall situation and to acquire detailed information about individual display objects.
Therefore, it is assumed that the user repeats the operation of displaying the wide area map to grasp the entire situation, displaying the detailed map and grasping the individual situation, and the scale of the map display device 100 has changed greatly. Even in this case, it is necessary to display the display map quickly.

  According to the map display device 100 described above, since the processing amount of the processing device such as the CPU 911 is small, the display map can be displayed in real time.

Embodiment 2. FIG.
A second embodiment will be described with reference to FIG.
Since the appearance, hardware resources, and functional block configuration of the map display device 100 in this embodiment are the same as those described in the first embodiment, description thereof is omitted here.

  In the first embodiment, the case where the aggregation process is re-executed with the change of the scale has been described, but in this embodiment, the case where the aggregation process is re-executed with the movement of the center point will be described.

FIG. 10 is a flowchart showing an example of the flow of map display processing in which the map display device 100 in this embodiment displays a display map.
In addition, about the process common to the process of the map display process demonstrated using FIG. 8 in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted here.

  In S17, when the aggregation execution determination unit 133 determines that there is no change in the scale level, the process proceeds to S31.

In S31, the aggregation execution determination unit 133 inputs the scale data stored in the scale input unit 111 in S11 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 inputs the center data stored in the center input unit 112 in S12 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 calculates the latitudes and longitudes of the four corners of the display area based on the input scale data and the input center data using a processing device such as the CPU 911.
Note that the aggregation execution determination unit 133 may acquire the latitudes and longitudes of the four corners of the display area from the map acquisition unit 120.

The aggregation execution determination unit 133 inputs the aggregation area data stored in the aggregation area storage unit 135 using a processing device such as the CPU 911.
Aggregation execution determination unit 133 uses a processing device such as CPU 911 to display the display area within the aggregation area based on the calculated latitude and longitude of the four corners of the display area and the aggregation area indicated by the input aggregation area data. Determine whether or not.
Specifically, the aggregation execution determination unit 133 uses a processing device such as the CPU 911 to compare the latitude of the upper left corner of the display area with the latitude indicated by the northernmost latitude data included in the aggregation area data. When the latitude in the upper left corner is larger, it is determined that the display area does not fit within the total area.
Further, the aggregation execution determination unit 133 uses a processing device such as the CPU 911 to compare the longitude of the upper left corner of the display area with the longitude indicated by the west end latitude data included in the aggregation area data, and to determine the upper left corner of the display area. When the longitude is smaller, it is determined that the display area does not fit within the total area.
Similarly, the aggregation execution determination unit 133 determines the latitude and longitude of the four corners, and determines whether or not the display area falls within the aggregation area.
If it is determined that the display area falls within the total area, the process proceeds to S24. That is, the aggregation process is not performed.
If it is determined that the display area does not fit within the total area, the process proceeds to S18. That is, the aggregation process is executed.

A user usually displays a display map of a certain area on the map display device 100, grasps the situation of that area, reduces the scale of the display map, grasps the overall situation, and then expands another area. It is assumed that the operation of viewing is performed.
For this reason, it is rare for the user to change the display area of the display map from one area to another by simply moving the center point without changing the scale.
When the user performs such an operation, since the aggregation processing is not performed in the first embodiment, if the display area extends outside the aggregation area, the aggregated graphic cannot be displayed.
Therefore, in Embodiment 1, it is necessary to make the total area relatively wide so that the display area does not protrude outside the total area.

  In this embodiment, when the user moves the center point of the display map and the display area does not fit within the total area, the total area is automatically changed and the total process is executed. As a result, the display area of the display map always falls within the aggregation area, and the aggregated figure can be correctly displayed.

The map display device 100 in this embodiment is
The aggregate figure setting unit 130
Using a storage device such as the magnetic disk device 920, the total area data indicating the calculated total area is stored,
Using a processing device such as the CPU 911, based on the coordinates of the center point input by the center input unit 112 and the stored total area data, it is determined whether or not the display area falls within the total area.
When it is determined that the display area does not fall within the aggregation area, it is determined that the aggregation process is performed using a processing device such as a CPU 911.

According to the map display device 100 in this embodiment, when the display area of the display map falls within the total area, the total process is not executed, so that it takes time for the map display unit 180 to display the display map. There is an effect that it can be shortened.
In addition, when the display area of the display map does not fit within the total area, the total process is executed even if the scale level is not changed. There is an effect that can be.
Further, when the display area of the display map does not fit within the total area, the total area is changed and the total process is executed. Therefore, even if the total area is a relatively narrow area, the aggregate figure can be displayed correctly. Since the total area can be narrowed, the time required for executing the totaling process can be shortened, and the time required for the map display unit 180 to display the display map can be shortened.

Embodiment 3 FIG.
Embodiment 3 will be described with reference to FIG.
Since the appearance, hardware resources, and functional block configuration of the map display device 100 in this embodiment are the same as those described in the first embodiment, description thereof is omitted here.

  In the second embodiment, the aggregation process is executed after the display area does not fit within the aggregation area. In this embodiment, a case will be described in which the aggregation process is executed while the display area is still within the aggregation area.

FIG. 11 is a flowchart showing an example of the flow of map display processing in which the map display device 100 according to this embodiment displays a display map.
In addition, about the process common to the process of the map display process demonstrated using FIG. 8 in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted here.

In S17, when the aggregation execution determination unit 133 determines that there is no change in the scale level, the process is branched into two, and the process of S24 and the process of S36 are executed in parallel.
That is, while the aggregated graphic drawing unit 150 generates an aggregated display diagram, the following processing is performed in parallel with it.

In S <b> 36, the aggregation execution determination unit 133 inputs the scale data stored in the scale input unit 111 in S <b> 11 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 inputs the center data stored in the center input unit 112 in S12 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 calculates the latitudes and longitudes of the four corners of the assumed display area based on the input scale data and the input center data using a processing device such as the CPU 911.
The display assumed area is an area that may become a display area when the user moves the center point of the display area in the near future. For example, a display assumed area is centered on the same central point as the display area, and is twice as wide as the display area and four times as wide as the area.

The aggregation execution determination unit 133 inputs the aggregation area data stored in the aggregation area storage unit 135 using a processing device such as the CPU 911.
The aggregation execution determination unit 133 uses the processing device such as the CPU 911 to calculate the display assumed area within the aggregation area based on the calculated latitude and longitude of the four corners of the assumed display area and the aggregation area indicated by the input aggregation area data. It is judged whether it fits.
Thereby, the aggregation execution determination unit 133 can determine whether the display area is close to the end of the aggregation area.

  If it is determined that the display area is close to the end of the total area, the process proceeds to S18. That is, the aggregation process is executed.

In Embodiment 2, since the aggregation process is executed after the display area does not fit within the aggregation area, the aggregation graphic drawing unit 150 cannot generate an aggregation display diagram until the aggregation process is completed. There is a time lag before the map display unit 180 displays the display map.
In this embodiment, the aggregation process is executed when the display area is close to the end of the aggregation area. Since the display area is still within the total area, the aggregate graphic drawing unit 150 can generate an aggregate display diagram in parallel with the total process. Therefore, the time taken for the map display unit 180 to display the display map can be shortened.

  The generation of the aggregated display diagram and the aggregation process may not be executed in parallel, but the aggregation process may be executed after the generation of the aggregated display diagram is completed.

The map display device 100 in this embodiment is
The aggregate figure setting unit 130
Using a storage device such as the magnetic disk device 920, the total area data indicating the calculated total area is stored,
Using a processing device such as the CPU 911, based on the coordinates of the center point input by the center input unit 112 and the stored total area data, it is determined whether the display area is close to the end of the total area,
When it is determined that the display area is close to the end of the total area, it is determined that the total process is performed using a processing device such as a CPU 911.

  According to the map display device 100 in this embodiment, since the center point is moved and the display area of the display map is close to the end of the total area, the total process is executed, so the end of the total process is not waited. In addition, the aggregated graphic drawing unit 150 can generate an aggregated display diagram, and the time required for the map display unit 180 to display the display map can be shortened.

Embodiment 4 FIG.
The fourth embodiment will be described with reference to FIG.
Since the appearance, hardware resources, and functional block configuration of the map display device 100 in this embodiment are the same as those described in the first embodiment, description thereof is omitted here.

  In this embodiment, a configuration will be described in which when the database stored in the display target database storage unit 140 is updated, the updated content is reflected on the display map.

FIG. 12 is a flowchart showing an example of the flow of map display processing in which the map display device 100 in this embodiment displays a display map.
In addition, about the process common to the process of the map display process demonstrated using FIG. 8 in Embodiment 1, the same code | symbol is attached | subjected and description is abbreviate | omitted here.

  In S17, when the aggregation execution determination unit 133 determines that there is no change in the scale level, the process proceeds to S41.

In S41, the aggregation execution determination unit 133 determines whether the display target database update unit 190 has updated the database stored in the display target database storage unit 140 using a processing device such as the CPU 911.
For example, when the display target database update unit 190 updates the database, a flag indicating that the database has been updated is set and stored using a storage device such as the magnetic disk device 920, and the tabulation execution determination unit 133 By looking at the flag, it is determined whether or not the display target database update unit 190 has updated the database.
Or if the display object database update part 190 is the structure which updates the database which the display object database memory | storage part 140 memorize | stored regularly with a predetermined period, the aggregation execution determination part 133 will have the predetermined period passed? By determining whether or not, the display target database update unit 190 may determine whether or not the database has been updated.

When it is determined that the database stored in the display target database storage unit 140 has been updated, the process proceeds to S18. That is, the aggregation process is executed.
When it is determined that the database stored in the display target database storage unit 140 has not been updated, the process proceeds to S24. That is, the aggregation process is not executed.

  As described above, when the display target database update unit 190 updates the database stored in the display target database storage unit 140, even if the scale level and the center point are not changed, the aggregation process is executed, and the map display unit 180 Display a display map based on the latest information. Thereby, the user can avoid missing important information newly generated.

  The totaling process at the time of updating the database may be the same as the normal totaling process, but only the changed part is totaled, and the increase / decrease in the number of display objects is totalized. The totaled results may be increased or decreased.

The map display device 100 in this embodiment further includes:
It has the display object database update part 190, It is characterized by the above-mentioned.
The display target database update unit 190
The data stored in the display target database storage unit 140 is updated.
The aggregate figure setting unit 130
When the display target database update unit 190 updates the data, it is determined that the aggregation process is executed.

  According to the map display device 100 in this embodiment, when the display target database update unit 190 updates the data, the aggregate graphic setting unit 130 executes the aggregation process, so that the map display unit 180 displays the latest information. There is an effect that can be done.

The map display device 100 in this embodiment is
The display target database update unit 190
The data stored in the display target database storage unit 140 is updated at a predetermined cycle.
The aggregate figure setting unit 130
When the predetermined period has elapsed, it is determined that the aggregation process is executed.

  According to the map display device 100 in this embodiment, the display target database update unit 190 updates the data at a predetermined cycle, and the aggregated graphic setting unit 130 executes the aggregation process at the same cycle as the update cycle. There is an effect that the data is not updated in the May rain type, and therefore, the counting process is frequently performed and the processing time of the entire map display device 100 is not affected.

  In this embodiment, the case where a configuration for determining update of the database is added to the configuration described in the first embodiment, but the database described in the second embodiment and the third embodiment is added to the configuration described in the first embodiment. A configuration for determining whether to update can be added.

Embodiment 5. FIG.
The fifth embodiment will be described with reference to FIGS.
Since the appearance, hardware resources, and functional block configurations of the map display device 100 in this embodiment are the same as those described in the first embodiment, description thereof is omitted here.

  In this embodiment, a case will be described in which not only the number of display targets in the divided area but also other additional information is displayed in the aggregate display.

FIG. 13 is a flowchart showing an example of the flow of target number totaling processing in which the aggregate graphic setting unit 130 in this embodiment totals the number of display targets.
In addition, the process which this figure shows is a process corresponded to S21 among the map display processes demonstrated using FIG. 8 in Embodiment 1. FIG.

In S <b> 51, the target number counting unit 137 inputs the total area data output by the total area calculation unit 134 using a processing device such as the CPU 911.
The target number counting unit 137 receives the divided region data output from the region dividing unit 136 using a processing device such as the CPU 911.
The target count totaling unit 137 uses a storage device such as the magnetic disk device 920 to store the number of disaster targets (an example of the number of display targets) and the number of recovery targets (predetermined state display) for each of the split regions indicated by the input split region data. A storage area for storing an example of the number of objects) is secured.
The target number counting unit 137 initializes the secured storage area to 0 by using a processing device such as the CPU 911.

  In S <b> 52, the target number counting unit 137 inputs data about one display target from the database stored in the display target database storage unit 140 using a processing device such as the CPU 911. That is, the target number counting unit 137 uses a processing device such as the CPU 911 to store the position data stored in the position storage unit 141, the urgency level data stored in the urgency level storage unit 142, the status data stored in the state storage unit 143, and the like. Enter.

In S53, the target number counting unit 137 uses a processing device such as the CPU 911 to compare the position indicated by the position data input in S52 with the total area indicated by the total area data input in S51, and display the display target. It is determined whether or not is located in the total area.
If it is determined that the position is within the total area, the process proceeds to S54.
If it is determined that it is located outside the total area, the process proceeds to S59.

In S <b> 54, the target number counting unit 137 uses a processing device such as the CPU 911 to determine whether the display target is “damaged” based on the state indicated by the state data input in S <b> 52.
If it is determined that the disaster has occurred, the process proceeds to S55.
If it is determined that there is no damage, the process proceeds to S59.

  In S55, the target number counting unit 137 uses a processing device such as the CPU 911 to compare the position indicated by the position data input in S52 with the divided area indicated by the divided area data input in S51, and display the display target. The divided area where is located is calculated.

  In S <b> 56, the target number counting unit 137 increases the number of disaster targets for the divided area calculated in S <b> 55 by using a processing device such as the CPU 911.

In S57, the target number counting unit 137 determines whether or not the display target has been “recovered” based on the state indicated by the state data input in S52, using a processing device such as the CPU 911.
If it is determined that the recovery has been made, the process proceeds to S58.
If it is determined that it has not been recovered, the process proceeds to S59.

  In S58, the target number counting unit 137 uses the processing device such as the CPU 911 to increase the number of restoration targets for the divided area calculated in S55 by one.

In S59, the target number totaling unit 137 uses a processing device such as the CPU 911 to determine whether or not all display target data has been input from the database stored in the display target database storage unit 140 and processed. .
If it is determined that there is an unprocessed display target, the process returns to S52.
If it is determined that the processing has been completed for all display targets, the process proceeds to S60.

  In S <b> 60, the target number counting unit 137 outputs the disaster target number data and the recovery target number data for each of the divided areas using a processing device such as the CPU 911. The disaster target number data is data indicating the total number of disaster targets, and is an example of display target number data. The recovery target number data is data indicating the total number of recovery targets, and is an example of predetermined state display target number data.

FIG. 14 is a diagram showing an example of an aggregate graphic selected by the aggregate graphic selection unit 138 in this embodiment.
The aggregate graphic selection unit 138 selects an aggregate graphic (aggregate icon) based on the number of disaster targets and the recovery rate. The recovery rate is the ratio of display targets that have completed emergency response and have been recovered from the display target that has been damaged, and is calculated using the formula "(Recovery rate) = (number of recovery targets) ÷ (number of disaster targets)" It is a value. The recovery rate is an example of a predetermined state rate.
In this example, when the number of disaster targets is the same, an aggregated figure having the same shape is selected regardless of the recovery rate. If the recovery rate is the same, an aggregate figure with the same color is selected regardless of the number of disaster targets. For example, when the restoration rate is less than 40%, the color of the aggregated figure is “red”, when the restoration rate is 40% or more and less than 70%, “orange”, when it is 70% or more and less than 100%, “yellow”, In the case of 100%, a color is assigned such as “green”.
As a result, the user can intuitively understand the situation of the disaster and can also intuitively understand which local site response is delayed, and take appropriate measures such as placement instructions of workers. Can do.

The aggregated graphic selection unit 138 uses the processing device such as the CPU 911 to input the disaster target number data and the recovery target number data output by the target number totaling unit 137 for each of the divided areas.
Using the processing device such as the CPU 911, the aggregated graphic selection unit 138 calculates the recovery rate by dividing the recovery target number indicated by the input recovery target number data by the disaster target number indicated by the input disaster target number data. .
The aggregated graphic selection unit 138 uses a processing device such as the CPU 911 to select a corresponding aggregated graphic based on the number of disaster targets indicated by the input number of disaster target data and the calculated recovery rate.
The aggregated graphic selection unit 138 outputs selected graphic data indicating the selected aggregated graphic using a processing device such as the CPU 911.

  The aggregate graphic selected by the aggregate graphic selection unit 138 may have any shape, pattern, or color, and may or may not be unified as in this example.

The map display device 100 in this embodiment is
The display target database storage unit 140 further includes:
State data indicating the state of the display object is stored using a storage device such as a magnetic disk device 920.
The aggregate figure setting unit 130 further
When it is determined that the aggregation processing is to be executed, the divided areas are divided into a plurality of divided areas based on the position data and state data stored in the display target database storage unit 140 using a processing device such as the CPU 911. The number of the predetermined state display objects in the predetermined state among the display objects located in the position is counted, and using the processing device such as the CPU 911, based on the total number of display objects and the number of the predetermined state display objects, It is characterized by selecting a corresponding aggregated figure.

  According to the map display device 100 in this embodiment, the aggregate graphic setting unit 130 selects the aggregate graphic displayed by the map display unit 180 at the time of the aggregate display based on the number of display targets and the number of predetermined state display targets. Therefore, it is possible to notify the user who views the display map displayed by the map display unit 180 not only the number of display objects in the divided area but also other additional information.

The map display device 100 in this embodiment is
The aggregate figure setting unit 130
Using the processing device such as the CPU 911, the predetermined state ratio is calculated by dividing the total number of the predetermined state display targets by the number of the total display targets, and the total display target is calculated using the processing device such as the CPU 911. The aggregate figure which has the shape corresponding to the number of and the color corresponding to the calculated predetermined state ratio is selected.

  According to the map display device 100 in this embodiment, the aggregate figure displayed by the map display unit 180 during aggregate display has a shape corresponding to the number of display objects and a color corresponding to a predetermined state rate. Therefore, there is an effect that information can be presented in an easy-to-understand manner to a user who views the display map displayed by the map display unit 180.

The display object database storage unit 140 of the map display device 100 in this embodiment further includes:
A storage device such as a magnetic disk device 920 is used to store status data indicating whether or not the display target has been damaged and whether or not the display target has been recovered.
The aggregate figure setting unit 130 further
When it is determined that the aggregation processing is to be executed, the divided areas are divided into a plurality of divided areas based on the position data and state data stored in the display target database storage unit 140 using a processing device such as the CPU 911. The number of display targets affected by the disaster is counted as the number of damaged display targets, the number of restored display targets is totaled as the number of recovery display targets, and the total is restored using a processing device such as the CPU 911. Divide the number of display objects by the total number of disaster display objects to calculate the recovery rate, and use a processing device such as the CPU 911 to perform the corresponding aggregation based on the total number of disaster targets and the calculated recovery rate It is characterized by selecting a figure.

  According to the map display device 100 in this embodiment, the aggregated graphic displayed by the map display unit 180 at the time of the aggregated display represents the number of disaster display targets in the divided area and the recovery rate. By looking at the display map displayed by the unit 180, there is an effect that appropriate measures such as the placement of workers can be quickly performed.

The recovery rate is an example of additional information, and other additional information may be displayed.
For example, the configuration may be such that the urgency level of the display target having the highest necessity of emergency response among the display targets in the divided area is displayed as additional information.

FIG. 15 is a flowchart showing another example of the flow of the target number totaling process in which the aggregated graphic setting unit 130 totals the number of display targets in this embodiment.
In addition, the same code | symbol is attached | subjected about the process in common with the process of the object number totaling process demonstrated using FIG. 13, and description is abbreviate | omitted here.
This is an example of the target number counting process in the case where the urgency level of the display target having the highest necessity of emergency response is displayed as additional information.

In S71, the target count totaling unit 137 uses a processing device such as the CPU 911, and based on the urgency indicated by the urgency data input in S52, the urgency of the display target is higher than the urgency of the divided area. Determine whether or not.
The urgency level of the divided area is the urgency level of the display object that is most necessary for urgent response among the display objects located in the divided area, and is set to 0 in the initialization process (S51). It is set.
When it is determined that the urgency level of the display target is higher than the urgency level of the divided area, the process proceeds to S72.
When it is determined that the urgency level of the display target is lower than the urgency level of the divided area, the process proceeds to S59.

  In S72, the target number counting unit 137 uses the processing device such as the CPU 911 to set the urgency level of the display target as the urgency level of the divided area. That is, the target number totalization unit 137 stores the urgency data indicating the urgency level of the display target as the urgency level data indicating the urgency level of the divided area by using a storage device such as the magnetic disk device 920.

  In S <b> 73, the target number counting unit 137 uses the processing device such as the CPU 911 to output the disaster target number data and the divided region urgency data for each divided region. Divided area urgency data is data indicating the urgency of the divided area obtained by aggregation, and is the display target with the highest necessity of emergency response among the display objects located in the divided area. This data indicates the degree of urgency.

The aggregated graphic selection unit 138 uses the processing device such as the CPU 911 to input the disaster target number data and the divided area urgency data, and selects the corresponding aggregated graphic.
As a result, it is possible to notify the user who views the display map displayed by the map display unit 180 whether or not there is a display target that requires emergency response in the divided area.

The display object database storage unit 140 of the map display device 100 in this embodiment further includes:
The urgent data indicating the necessity of the emergency response of the display target is stored using a storage device such as a magnetic disk device 920.
The aggregate figure setting unit 130 further
When it is determined that the aggregation process is to be executed, the divided areas are divided into a plurality of divided areas based on the position data and the urgency data stored in the display target database storage unit 140 using a processing device such as the CPU 911. Among the display objects located within, the necessity of emergency response for the display object having the highest necessity for emergency response is calculated to obtain the divided region urgency level, and using the processing device such as the CPU 911, the aggregated display objects are displayed. A corresponding aggregated graphic is selected based on the number and the divided region urgency.

  According to the map display device 100 in this embodiment, the aggregated graphic setting unit 130 selects the aggregated graphic displayed by the map display unit 180 at the time of the aggregated display based on the number of display objects and the divided area urgency. Notifying the user who views the display map displayed by the map display unit 180 not only the number of display objects in the divided area but also whether or not there is a display object that requires emergency response in the divided area. There is an effect that can be done.

  In this way, the number of types of graphics such as icons is increased, and the information required by the user is improved by changing the shape based on not only the number of display objects in the divided area but also other additional information. Can be transmitted.

Embodiment 6 FIG.
The sixth embodiment will be described with reference to FIGS.
Since the appearance, hardware resources, and functional block configuration of the map display device 100 in this embodiment are the same as those described in the first embodiment, description thereof is omitted here.

  In this embodiment, a description will be given of a configuration in which individual display is performed for a display target that is highly necessary for emergency response even during consolidated display.

FIG. 16 is a flowchart showing an example of the flow of map display processing in which the map display device 100 in this embodiment displays a display map.
In addition, the same code | symbol is attached | subjected about the process common to the process of the map display process demonstrated using FIG. 8 in Embodiment 1, and description is abbreviate | omitted here.

In S81, the individual figure drawing unit 160 generates an individual display diagram using a processing device such as the CPU 911, and stores the individual display diagram data using a storage device such as the magnetic disk device 920.
The individual display diagram generated here is different from the one generated in S16, and is only for the display target having a high necessity for emergency response.

  In S25, the map display unit 180 generates a display map using a processing device such as the CPU 911, and displays the generated display map using a display device 901 such as a CRT.

When the scale level is smaller than the predetermined scale level, the map display unit 180 inputs the map data stored by the map acquisition unit 120 using a processing device such as the CPU 911.
The map display unit 180 inputs the aggregated display diagram data stored in the aggregated graphic drawing unit 150 using a processing device such as the CPU 911.
The map display unit 180 inputs the individual display diagram data stored by the individual figure drawing unit 160 using a processing device such as the CPU 911.
The map display unit 180 uses a processing device such as the CPU 911 to execute a process of superimposing the aggregate display diagram indicated by the input aggregate display diagram data on the map indicated by the input map data. A process of superimposing the individual display diagrams indicated by the input individual display diagram data is executed to generate a display map.
The map display unit 180 displays the generated display map using a display device 901 such as a CRT.

FIG. 17 is a diagram showing an example of a display map displayed by the map display unit 180 in this embodiment.
The map 620 is a map indicated by the map data stored by the map acquisition unit 120.
The aggregate display diagram 650 is an aggregate display diagram indicated by the aggregate display diagram data stored in the aggregate graphic drawing unit 150.
The individual display diagram 660 is an individual display diagram indicated by the individual display diagram data stored in the individual graphic drawing unit 160.
The map display unit 180 uses a processing device such as the CPU 911 to superimpose the aggregated display diagram 650 on the map 620 and further superimpose the individual display diagram 660 thereon to generate a display map 680.

In this way, for display targets that require a high level of emergency response, individual figures (individual icons) are displayed even at the scale level of the aggregate display. Therefore, not only the number of display targets in the divided area but also the emergency display The user can quickly know whether there is a display target that needs to be handled.
Furthermore, when the detailed information about the display object is displayed by clicking on the individual figure, the detailed information about the display object that is highly necessary for emergency response is maintained at the scale level of the consolidated display. Since it becomes possible to display, a user can respond quickly.

FIG. 18 is a flowchart showing an example of an emergency display diagram generation process in which the individual figure drawing unit 160 in this embodiment generates an individual display diagram for a display object with a high degree of urgency.
The emergency display map generation process is a process corresponding to S81 of FIG.

  In S91, the individual graphic drawing unit 160 performs an initialization process using a processing device such as the CPU 911, prepares individual display diagram data indicating an individual display diagram on which nothing is drawn (transparent), and performs magnetic processing. The data is stored using a storage device such as a disk device 920.

  In S <b> 92, the individual graphic drawing unit 160 inputs data about one display target from the database stored in the display target database storage unit 140 using a processing device such as the CPU 911. That is, the individual graphic drawing unit 160 uses a processing device such as the CPU 911 to store the position data stored in the position storage unit 141, the urgency data stored in the urgency storage unit 142, the status data stored in the state storage unit 143, and the like. Enter.

In S93, the individual figure drawing unit 160 uses a processing device such as the CPU 911 to determine whether or not the display target is located in the display area based on the position indicated by the position data input in S92.
If it is determined that it is located within the display area, the process proceeds to S94.
If it is determined that it is located outside the display area, the process proceeds to S96.

In S94, the individual figure drawing unit 160 determines whether the urgency level is high by comparing the urgency level indicated by the urgency level data input in S52 with a predetermined urgency level using a processing device such as the CPU 911. To do.
If it is determined that the degree of urgency is high, the process proceeds to S95.
If it is determined that the degree of urgency is low, the process proceeds to S96.

  In S95, the individual figure drawing unit 160 draws the individual figure at a position on the diagram corresponding to the geographical position indicated by the position data input in S52, using a processing device such as the CPU 911.

In S <b> 96, the individual figure drawing unit 160 uses a processing device such as the CPU 911 to determine whether or not data about all display targets has been input and processed from the database stored in the display target database storage unit 140. .
If it is determined that there is an unprocessed display target, the process returns to S92.
If it is determined that the processing has been completed for all display targets, the process proceeds to S97.

  In S97, the individual graphic drawing unit 160 stores individual display diagram data indicating the generated individual display diagram using a storage device such as the magnetic disk device 920.

  In this way, the individual graphic drawing unit 160 generates an individual display diagram in which only individual graphics for a display target that is highly necessary for emergency response among the display targets located in the display area are drawn.

In this example, all display objects having a higher urgency level than the predetermined urgency level are individually displayed. However, for example, those with higher urgency levels in the display area may be individually displayed.
That is, the individual figure drawing unit 160 uses a processing device such as the CPU 911 to rearrange the display objects in the display area in descending order of urgency, and in order from the highest urgency, for a predetermined number of display objects. Draw individual figures.

  In this example, the individual display diagram is generated after the generation of the aggregate display diagram is completed. However, the individual display diagram may be generated in parallel with the generation of the aggregate display diagram or the aggregation process.

The map display device 100 in this embodiment is
The display target database storage unit 140 further includes:
The urgent data indicating the necessity of the emergency response of the display target is stored using a storage device such as a magnetic disk device 920.
The individual figure drawing unit 160
When the scale level calculated by the aggregated figure setting unit 130 is smaller than a predetermined scale level, using a processing device such as the CPU 911, based on the urgency data stored in the display target database storage unit 140, the emergency response of the display target The display target database storage unit 140 stores the display target that is determined to have a high necessity for emergency response using a processing device such as the CPU 911, based on the position data stored in the display target database storage unit 140. An individual display diagram is generated by drawing a predetermined figure at a position on the figure corresponding to the geographical position indicated by the position data.
The map display unit 180
When the scale level calculated by the aggregate graphic setting unit 130 is smaller than a predetermined scale level, the aggregate graphic drawing unit 150 generates the aggregate display on the map representing the display area using a processing device such as the CPU 911. The figures are superimposed, and further, the display map is generated by superimposing the individual display diagrams generated by the individual figure drawing unit 160 thereon.

According to the map display device 100 in this embodiment, even when the scale level of the aggregate display is used, individual display is performed for a display target that is highly necessary for emergency response. At the same time as grasping, it is possible to obtain detailed information about the display target that requires emergency response, and it is possible to quickly respond.
In addition, the display objects to be displayed individually are only those that are highly necessary for emergency response, and there are fewer figures to be displayed than when all display objects are displayed individually. The time required for generation can be shortened, and the time required for the map display unit 180 to display the display map can be shortened.

FIG. 3 is a diagram showing an example of the appearance of the map display device 100 according to the first embodiment. FIG. 3 is a diagram illustrating an example of hardware resources of the map display device 100 according to the first embodiment. The system block diagram which shows an example of the whole structure of the disaster information system 200 using the map display apparatus 100 in the portable 1 of implementation. FIG. 3 is a block configuration diagram illustrating an example of a functional block configuration of the map display device 100 according to the first embodiment. FIG. 4 is a diagram illustrating an example of a relationship between a display area, a total area, and a divided area in the first embodiment. The figure which shows an example of the aggregate figure which the aggregate figure selection part 138 in Embodiment 1 selects. FIG. 5 shows an example of a display map displayed by the map display unit 180 in the first embodiment. The flowchart figure which shows an example of the flow of the map display process in which the map display apparatus 100 in Embodiment 1 displays a display map. FIG. 5 is a diagram illustrating an example of a relationship between an operation by a user and an operation of the map display device 100 in the first embodiment. The flowchart figure which shows an example of the flow of the map display process in which the map display apparatus 100 in Embodiment 2 displays a display map. The flowchart figure which shows an example of the flow of the map display process in which the map display apparatus 100 in Embodiment 3 displays a display map. The flowchart figure which shows an example of the flow of the map display process in which the map display apparatus 100 in Embodiment 4 displays a display map. The flowchart figure which shows an example of the flow of the object number totaling process which the total figure setting part 130 in Embodiment 5 totals the number of display objects. FIG. 20 is a diagram illustrating an example of an aggregate graphic selected by an aggregate graphic selection unit 138 according to the fifth embodiment. The flowchart figure which shows another example of the flow of the object number totaling process in which the aggregate figure setting part 130 in Embodiment 5 totals the number of display objects. The flowchart figure which shows an example of the flow of the map display process in which the map display apparatus 100 in Embodiment 6 displays a display map. The figure which shows an example of the display map which the map display part 180 in Embodiment 6 displays. The flowchart figure which shows an example of the flow of the emergency display figure production | generation process in which the separate figure drawing part 160 in Embodiment 6 produces | generates the individual display figure about the display target with high urgency.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 Map display apparatus, 111 Scale input part, 112 Center input part, 120 Map acquisition part, 130 Aggregate figure setting part, 131 Scale level calculation part, 132 Scale level memory | storage part, 133 Aggregation execution determination part, 134 Aggregation area calculation part, 135 total area storage unit, 136 area division unit, 137 target number totalization unit, 138 aggregated graphic selection unit, 139 selected graphic storage unit, 140 display target database storage unit, 141 position storage unit, 142 urgency level storage unit, 143 state storage Unit, 150 aggregated graphic drawing unit, 160 individual graphic drawing unit, 170 icon storage unit, 180 map display unit, 190 display target database update unit, 200 disaster information system, 201 map information providing server device, 202 portable terminal device, 203 sensor , 802 worker, 803 building, 901 display Device, 902 keyboard, 903 mouse, 904 FDD, 905 CDD, 906 printer device, 907 scanner device, 910 system unit, 911 CPU, 912 bus, 913 ROM, 914 RAM, 915 communication device, 920 magnetic disk device, 921 OS, 922 window system, 923 programs, 924 files, 931 telephone, 932 facsimile machine, 940 Internet, 941 gateway, 942 LAN.

Claims (12)

A storage device that stores information; a processing device that processes information; a display device that displays information; a display target database storage unit; an aggregated graphic setting unit; an aggregated graphic drawing unit; and a map display unit ,
The display target database storage unit is
Using the storage device, the position data indicating the geographical position of the display target to be displayed on the map is stored,
The aggregate figure setting part
Using the above processing device, determine whether to execute the aggregation process,
When it is determined that the aggregation processing is to be executed, the processing device is used to divide the aggregation area including the display area to be displayed on the map and wider than the display area into a plurality of divided areas, and For each, using the processing device, based on the position data stored in the display target database storage unit, the number of display objects located in the divided area is totaled, and the display target is tabulated using the processing device The figure corresponding to the number of figures is selected, and using the storage device, the selected figure data indicating the selected figure is stored,
The aggregate figure drawing unit
Using the processing device, for each of the plurality of divided areas, the figure indicated by the selected figure data stored by the aggregated figure setting unit is drawn at a position on the figure corresponding to the geographical position of the divided area. , Generate an aggregate view,
The map display section
Using the processing device, the aggregated display diagram generated by the aggregated graphic drawing unit is superimposed on the map representing the display area to generate a display map, and the display generated using the display device A map display device characterized by displaying a map. The map display device further includes an input device for inputting information, and a scale input unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The aggregate figure setting part
Using the processing device, the scale level is calculated based on the scale input by the scale input unit, the calculated scale level is stored using the storage device, and the calculated scale is calculated using the processing device. Determine if the level has changed,
The map display device according to claim 1, wherein, when it is determined that the scale level has been changed, the processing device is used to determine that the aggregation processing is to be executed. The map display device further includes an input device for inputting information, a scale input unit, and an individual figure drawing unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The aggregate figure setting part
Based on the scale input by the scale input unit using the processing device, the scale level is calculated,
The individual figure drawing unit
Using the processing device, based on the position data stored in the display target database storage unit, a predetermined figure is drawn at a position on the diagram corresponding to the geographical position indicated by the position data, and an individual display diagram Produces
The map display section
When the scale level calculated by the aggregate figure setting unit is larger than a predetermined scale level, the individual display drawing generated by the individual figure drawing unit is displayed on the map representing the display area using the processing device. The map display device according to claim 1, wherein a display map is generated by superimposing the map. The display target database storage unit further includes:
Using the storage device, store urgency data indicating the necessity of emergency response of the display target,
The individual figure drawing unit
When the scale level calculated by the aggregate graphic setting unit is smaller than a predetermined scale level, the display device needs to be urgently handled based on the urgency data stored in the display target database storage unit using the processing device. The display data is determined based on the position data stored in the display object database storage unit for the display object that is determined to have a high necessity for emergency response using the processing device. Draw a specific figure at a location on the diagram corresponding to the geographic location shown to generate an individual view
The map display section
When the scale level calculated by the aggregated graphic setting unit is smaller than a predetermined scale level, the aggregated display diagram generated by the aggregated graphic drawing unit is displayed on the map representing the display area using the processing device. 4. The map display device according to claim 3, wherein the display map is generated by superimposing and further superimposing the individual display drawing generated by the individual graphic drawing unit thereon. The map display device further includes an input device for inputting information, a scale input unit, and a center input unit,
The scale input unit is
Using the above input device, enter the scale of the map to be displayed,
The central input section is
Using the above input device, input the coordinates of the center point of the map to be displayed,
The aggregate figure setting part
Based on the scale input by the scale input unit using the processing device, the scale level is calculated,
When it is determined that the aggregation process is executed, the processing device is used to calculate the area of the aggregation area based on the calculated scale level, and the central point input by the central input unit using the processing apparatus The map display device according to claim 1, wherein the total area is calculated based on the coordinates of the calculated area and the calculated area of the total area. The aggregate figure setting part
Using the storage device, storing the calculated area data indicating the calculated area,
Using the processing device, based on the coordinates of the center point input by the center input unit and the stored total area data, determine whether the display area falls within the total area,
6. The map display device according to claim 5, wherein when it is determined that the display area does not fit within the total area, the processing apparatus is used to determine that the total process is to be executed. The aggregate figure setting part
Using the storage device, storing the calculated area data indicating the calculated area,
Using the processing device, based on the coordinates of the center point input by the center input unit and the stored total area data, determine whether the display area is near the end of the total area,
The map display device according to claim 5, wherein when it is determined that the display area is close to the end of the total area, the processing apparatus is used to determine that the total process is to be executed. The display target database storage unit further includes:
Using the storage device, state data indicating the state of the display target is stored,
The aggregate figure setting unit further includes:
When it is determined that the aggregation processing is to be executed, each of the plurality of divided areas is positioned in the divided area based on the position data and the state data stored in the display target database storage unit using the processing device. Among the display objects to be counted, the number of the predetermined state display objects in the predetermined state is counted, and the corresponding figure is calculated based on the total number of display objects and the number of the predetermined state display objects by using the processing device. The map display device according to claim 1, wherein the map display device is selected. The aggregate figure setting part
Using the above processing device, calculate the predetermined state ratio by dividing the number of the total number of display target objects by the total number of display objects, and use the above processing device to correspond to the total number of display objects The map display device according to claim 8, wherein a figure having a shape to be processed and a color corresponding to the calculated predetermined state ratio is selected. The map display device further includes a display target database update unit,
The display target database update unit
Update the data stored in the display target database storage unit,
The aggregate figure setting part
The map display device according to claim 1, wherein when the display target database update unit updates data, the display target database update unit determines that the aggregation processing is executed. The display target database update unit
Update the data stored in the display target database storage unit at a predetermined cycle,
The aggregate figure setting part
The map display device according to claim 10, wherein when the predetermined period has elapsed, it is determined that the aggregation process is executed.   A map according to any one of claims 1 to 11, comprising a computer having an input device for inputting information, a storage device for storing information, a processing device for processing information, and a display device for displaying information. A program that functions as a display device.

Images