JP2021033021A - Map display device, method, and program - Google Patents

Abstract

To improve visibility of a map.SOLUTION: A map display device (2) includes: storage means (221) for storing a map; acquisition means (211) for acquiring earthquake information including at least maximum seismic intensity; and display control means (214) for superposing the earthquake information on the map to display it on display means (1). The display control means (214) makes a center position of the map displayed on the display means (1) different according to the number of maximum seismic intensity included in the earthquake information.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technique for displaying a map.

Patent Document 1 discloses a technique for providing a user with various ground information in a desired position on an electronic map and a surrounding area by a simple operation by the user.

Japanese Unexamined Patent Publication No. 2010-54702

An object of the present invention is to improve the visibility of a map.

The map display device according to one aspect of the present invention is
A memory means to memorize the map and
An acquisition method for acquiring seismic information including at least the maximum seismic intensity,
It has a display control means that superimposes the earthquake information on the map and displays it on the display means.
The display control means is characterized in that the center position of the map displayed on the display means is changed according to the number of maximum seismic intensities included in the earthquake information.

It is a figure which shows the configuration example of the map display system. It is a figure which shows the data structure example of the map information storage part. It is a figure which shows the structural example of the transmittance table. It is a figure which shows the processing operation example of the map display device. It is a figure explaining an example which determines the center position of a map, and the display range of a map. It is a figure which shows the processing operation example of the map display device. It is a figure which shows the composition example of the map image to display on a user terminal. It is a figure explaining the modification which determines the center position of a map.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, those having the same reference numerals have the same or similar configurations.

<Map display system configuration example>
First, a configuration example of the map display system according to the present embodiment will be described with reference to FIG. FIG. 1 is a diagram showing a configuration example of a map display system according to the present embodiment.

As shown in FIG. 1, the map display system according to the present embodiment is configured by connecting a user terminal 1, a map display device 2, and an information providing device 3 via a network NW. The network NW can be applied to any communication form regardless of whether it is wired or wireless.

The information providing device 3 transmits disaster information such as an earthquake to the map display device 2, and the map display device 2 stores the disaster information in the disaster information storage unit 223. The disaster information includes a value indicating the degree of the magnitude of the disaster. For example, if the disaster information is an earthquake, the maximum seismic intensity is included.

The user terminal 1 transmits a disaster information display request to the map display device 2. When the map display device 2 receives a disaster information display request from the user terminal 1, the map display device 2 acquires the disaster information to be displayed from the disaster information storage unit 223. The map display device 2 displays the center position of the map displayed on the display unit of the user terminal 1 according to the number of values indicating the degree of the greatest degree of disaster among the values included in the disaster information to be displayed. To make it different. For example, when the disaster information to be displayed is an earthquake, the point where the maximum seismic intensity occurs is displayed on the map displayed on the display unit of the user terminal 1. Therefore, when the number of maximum seismic intensity displayed on the map is one, the display position of the maximum seismic intensity is set at the center position of the map to be displayed. When there are a plurality of maximum seismic intensity to be displayed on the map, a polygon including the display position of each maximum seismic intensity is created, and the center of gravity position of the polygon is set to the center position of the map to be displayed. As a result, even if there are multiple points with the maximum seismic intensity to be displayed on the map, the center position of the map to be displayed is set based on each point with the maximum seismic intensity, and the maximum is displayed on the display unit of the user terminal 1. It is possible to display a map containing information on multiple points where seismic intensity has occurred. As a result, the visibility of the map can be improved. Hereinafter, a configuration example of each device constituting the map display system of the present embodiment will be described.

<Configuration example of information providing device 3>
The information providing device 3 is a device that provides the map display device 2 with disaster information such as a tsunami, an earthquake, a typhoon, a landslide disaster, a tornado, and a river flood. The disaster information may be information provided by the Japan Meteorological Agency, a disaster prevention information sharing system (also referred to as SIP4D), or the like. The information providing device 3 includes a device such as a server. The information providing device 3 includes a control unit 31 and a storage unit 32.

The control unit 31 controls each unit of the information providing device 3. The storage unit 32 stores various information. The information providing device 3 of the present embodiment stores disaster information in the storage unit 32, and provides the disaster information stored in the storage unit 32 to the map display device 2. In the case of an earthquake, for example, the time of occurrence of the earthquake, the epicenter, the depth, the scale, the latitude / longitude and place name of the epicenter, the maximum seismic intensity, the latitude / longitude and place name of the maximum seismic intensity, the seismic intensity of the seismic observation point in each region, etc. Contains information.

<Configuration example of user terminal 1>
The user terminal 1 is a terminal used by the user. Examples of the user terminal 1 include devices such as smartphones and PCs. The user terminal 1 includes a control unit 11, a storage unit 12, an input / output unit 13, and a position information acquisition unit 14.

The control unit 11 controls each unit of the user terminal 1. The control unit 11 provides map information to the user of the user terminal 1. For example, the control unit 11 specifies parameters such as the type of disaster information to be displayed on the map, transmits a map display request to the map display device 2, acquires information on the map to be displayed from the map display device 2, and obtains information on the map to be displayed. A map is displayed on the user terminal 1 via the input / output unit 13. As a trigger for the control unit 11 to send a map display request to the map display device 2, for example, when the user terminal 1 accepts a display switching operation of the type of disaster information, it is included in the list of disaster information that has occurred in the past. For example, when the user terminal 1 accepts the display request operation of the disaster information to be displayed.

The storage unit 12 stores various information used by the user terminal 1. The input / output unit 13 is various interfaces used for input / output of information between the user terminal 1 and the user. Examples of the input / output unit 13 include a touch panel as an input unit, an operation button, a microphone, a touch panel as an output unit, a liquid crystal panel, and a speaker. The input / output unit 13 functions as a display unit for displaying a map. The position information acquisition unit 14 acquires the current position of the user terminal 1. The position information acquisition unit 14 receives, for example, radio waves from a GPS (Global Positioning System) satellite or information from a base station, detects the current position of the user terminal 1, and data on the detected current position (for example,). Get data such as latitude, longitude, and height). The height data may be acquired using a barometric pressure sensor or the like. The position information acquisition unit 14 may perform self-position estimation using pedestrian autonomous navigation (Pedestrian Dead Reckoning) or the like.

<Configuration example of map display device 2>
The map display device 2 is a device that provides map information to the user terminal 1. Examples of the map display device 2 include a device such as a server. The map display device 2 includes a control unit 21 and a storage unit 22.

The control unit 21 controls each unit of the map display device 2, and also functions as an information acquisition unit 211, an information extraction unit 212, an information reception unit 213, and a map display control unit 214.

The information acquisition unit 211 acquires disaster information and the like from the information providing device 3. The information acquisition unit 211 stores the acquired disaster information in the disaster information storage unit 223, which will be described later, for each disaster information type. The map display device 2 of the present embodiment can provide various disaster information stored in the disaster information storage unit 223 to the user terminal 1.

Based on the map data stored in the map information storage unit 221 described later, the information extraction unit 212 displays the note information preferentially over the disaster information displayed on the map from the note information included in the map. Is extracted. Then, the information extraction unit 212 creates a note layer composed of only the extracted note information. The note information to be extracted may be different depending on the type of disaster information. For example, when the type of disaster information is earthquake, etc., note information about prefecture name and city / ward / town / village name is extracted. If the type of disaster information is flooding of a river, note information about the river name is extracted. As a result, the note information related to the disaster information can be displayed on the map with priority over the disaster information. In addition, the information extraction unit 212 deletes the extracted note information from the note information included in the map, and creates a background map (also referred to as a base map) that does not include the extracted note information. The information extraction unit 212 stores the created background map and note layer in the map information storage unit 221 in association with the display scale and the disaster information type. The disaster information type is information for identifying the type of disaster information.

The information reception unit 213 receives a map display request or the like from the user terminal 1. The map display request includes information such as the type of disaster information to be displayed on the map.

The map display control unit 214 specifies the type of disaster information included in the map display request received by the information reception unit 213. Further, the map display control unit 214 specifies the display range of the map provided to the user terminal 1 based on the disaster information to be displayed. The display range of the specified map may be an area larger than the display range of the user terminal 1 by a certain range (for example, display range + buffer). As a result, even if the map displayed on the user terminal 1 is moved, the map can be displayed without reacquiring. Further, the map display control unit 214 determines the display scale of the map provided to the user terminal 1 based on the disaster information to be displayed.

Further, the map display control unit 214 specifies the transmittance corresponding to the above-determined display scale from the transmittance table stored in the transmittance information storage unit 224 described later, and displays the specified transmittance. Set in the target disaster information. Further, the map display control unit 214 sets the display color according to the type of disaster information to be displayed and the content of the disaster information in the disaster information. For example, if the type of disaster information is earthquake, set as follows.

If the seismic intensity is 1, set the display color to light blue. If the seismic intensity is 2, set the display color to green. If the seismic intensity is 3, set the display color to yellow. If the seismic intensity is 4, set the display color to orange. If the seismic intensity is 5, set the display color to red. The above setting is an example, and the seismic intensity information is further subdivided (for example, seismic intensity 5 lower, seismic intensity 5 upper, etc.), and an arbitrary color is set for each subdivided seismic intensity. May be good. As a result, the map display control unit 214 can set the display color according to the degree of magnitude of each seismic intensity.

Further, the map display control unit 214 acquires the background map and the note layer corresponding to the above-determined display scale and the type of disaster information from the background map and the note layer stored in the map information storage unit 221. Then, the display control unit 215 displays the information of the map image in which the disaster information of the transmittance and the display color set above exists on the acquired background map and the note layer acquired above exists on the disaster information. It is transmitted to the user terminal 1 and displayed on the user terminal 1.

The storage unit 22 stores various information used in the map display device 2. The storage unit 22 includes a map information storage unit 221, a route information storage unit 222, a disaster information storage unit 223, and a transmittance information storage unit 224.

As shown in FIG. 2, the map information storage unit 221 stores the map data for display in association with the display scale. For example, map data 1/1500, 1/3000, 1/8000, 1/21000, 1/75000, 1/150,000, 1/300,000, 1/900,000, wide area (for example, 1 / 1.5 million), It is stored in association with the display scale of the whole country (for example, 1 / 7.8 million). The map data includes information such as topography, buildings, roads, facilities, and notes necessary for constructing a background map, and the information differs depending on the display scale. For example, taking a road as an example, when the display scale is small, only the main roads such as highways and national roads and the notes attached to the roads are included in the map data, and the display scale is medium. In addition to the above, prefectural roads, major municipal roads, and notes attached to the roads are included in the map data, and if the display scale is large, in addition to the above, notes attached to narrow streets and the roads are added to the map data. include.

Further, as shown in FIG. 2, the map information storage unit 221 stores the background map and the note layer created by the information extraction unit 212 described above in association with the display scale and the disaster information type.

The route information storage unit 222 stores road network data. Road network data includes nodes and links connecting the nodes. Each link is associated with the distance of the road represented by the link and the average travel time (also referred to as travel time) as the link cost. Road network data is stored for each means of transportation (for example, walking, automobile, bicycle, etc.).

The disaster information storage unit 223 stores various disaster information acquired by the information acquisition unit 211.

The transmittance information storage unit 224 stores the transmittance table. As shown in FIG. 3, the transmittance table is a table in which the transmittance is registered for the display scale, and the transmittance registered for each display scale is set so as to increase as the display scale increases. ing.

<Example of processing operation of map display device 2>
Next, an example of processing operation performed by the map display device 2 will be described with reference to FIG. FIG. 4 describes an example of processing operation when displaying seismic information including a point where the maximum seismic intensity has occurred on a map.

When the map display device 2 receives the earthquake information display request from the user terminal 1 (step S1 / Yes), the map display device 2 acquires the earthquake information to be displayed from the disaster information storage unit 223 (step S2). For example, the user terminal 1 selects the earthquake information to be displayed from the list of earthquake information stored in the disaster information storage unit 223 of the map display device 2, and requests the display of the earthquake information on the map display device 2. Send to. In this case, the map display device 2 acquires the earthquake information to be displayed received from the user terminal 1 from the disaster information storage unit 223. The user terminal 1 may transmit an earthquake information display request to the map display device 2 without selecting the earthquake information to be displayed. In this case, the map display device 2 acquires the latest earthquake information stored in the disaster information storage unit 223.

The map display device 2 determines whether or not the maximum seismic intensity included in the seismic information to be displayed is one (step S3). When the maximum seismic intensity is one (step S3 / Yes), the display position of the maximum seismic intensity is set to be the center of the map to be displayed (step S4). For example, it is assumed that information on seismic intensity (for example, information on seismic intensity 1, seismic intensity 2, etc.) is divided and stored in 250 m mesh units. In this case, based on the information on the seismic intensity in units of 250 m mesh, the mesh in which the information on the maximum seismic intensity exists is specified, and it is determined whether or not there is one mesh. If there is one mesh in which the maximum seismic intensity information exists, the center coordinates of that mesh are set to be the center of the map to be displayed. As a result, for example, when the maximum seismic intensity included in the seismic information to be displayed is seismic intensity 5, and there is only one mesh of the seismic intensity 5, the display position of the mesh of the seismic intensity 5 is set at the center of the map to be displayed. Can be set.

Next, the map display device 2 creates a map image in which earthquake information is superimposed on a map at the center position set in step S4 and at a predetermined display scale, and the information of the map image is used as a user terminal. It is transmitted to 1 and displayed on the display unit of the user terminal 1 (step S5). As a result, when the maximum seismic intensity included in the seismic information to be displayed is one, the map display device 2 outputs a map centered on the display position of the maximum seismic intensity to the user terminal 1 and outputs the map to the user terminal 1. It can be displayed on the display unit.

In step S3, when there are a plurality of maximum seismic intensity included in the seismic information to be displayed (step S3 / No), the map display device 2 creates a polygon including the display position of each maximum seismic intensity, and the polygon is The position of the center of gravity of is set to the center of the map (step S6). For example, as shown in FIG. 5, it is assumed that there are three meshes in which the information on the maximum seismic intensity exists in the information on the seismic intensity managed in units of 250 m meshes. In FIG. 5, the three meshes indicated by reference numeral 100 are meshes in which information on the maximum seismic intensity exists. In this case, a polygon 200 connecting the center coordinates 101, 102, 103 of each mesh 100 is created. Then, the center of gravity position 201 of the created polygon 200 is set at the center of the map. The position of the center of gravity of the polygon 200 can be calculated by using a known calculation method. As a result, for example, if the maximum seismic intensity included in the seismic information to be displayed is seismic intensity 5, and there are a plurality of meshes of the seismic intensity 5, the display target is based on the display position of each mesh of the seismic intensity 5. The center of the map can be determined.

Next, the map display device 2 calculates a rectangle including the polygon 200, and determines a display scale capable of displaying the map included in the calculated rectangle on the display unit of the user terminal 1 (step S7). For example, as shown in FIG. 5, a rectangle 300 including the polygon 200 is calculated, the lower left coordinate 301 and the upper right coordinate 302 of the calculated rectangle 300 are calculated, and the rectangle is based on the calculated coordinate positions 301 and 302. The display scale that can display the map in 300 on the display unit of the user terminal 1 is determined. Thereby, the display scale that can display the map in the rectangle 300 can be determined. In FIG. 5, the rectangle 300 includes the outer shape of each mesh 100 that displays the maximum seismic intensity. However, a rectangle including the center coordinates 101, 102, 103 of each mesh 100 displaying the maximum seismic intensity may be calculated. Further, in FIG. 5, the display scale that allows the map in the rectangle 300 to be displayed on the display unit of the user terminal 1 is determined, but the map including at least the display position of the maximum seismic intensity is displayed on the display unit of the user terminal 1. It suffices if it is possible to determine the display scale that can be displayed. For example, as shown in FIG. 5, a rectangle 303 obtained by enlarging the rectangle 300 with a predetermined magnification is calculated, and the map in the rectangle 303 is used as a user terminal. The display scale that can be displayed on the display unit of 1 may be determined. If there are a plurality of display scales capable of displaying the map included in the rectangle on the display unit of the user terminal 1, the display scale having the largest display scale is selected from the plurality of display scales. May be good. This makes it possible to achieve the display scale with the highest visibility of the map included in the rectangle.

Next, the map display device 2 creates a map image in which the earthquake information is superimposed on the map at the center position set in step S6 and the display scale determined in step S7, and the information of the map image is used by the user. It is transmitted to the terminal 1 and displayed on the display unit of the user terminal 1 (step S8). As a result, the map display device 2 can be used based on the points of the maximum seismic intensity even if there are a plurality of points of the maximum seismic intensity included in the seismic information for which the display request is received from the user terminal 1. It is possible to determine the center position of the map to be displayed on the display unit of the user terminal 1, output the map of the determined center position to the user terminal 1, and display it on the display unit of the user terminal 1.

Next, another processing operation example performed by the map display device 2 will be described with reference to FIG. FIG. 6 is a diagram showing an example of processing operation when displaying disaster information on a map.

When the map display device 2 receives a disaster information display request from the user terminal 1 (step A1 / Yes), the map display device 2 stores the disaster information to be displayed based on the type of disaster information included in the display request. Obtained from 222 (step A2). The disaster information includes a value indicating the degree of the magnitude of the disaster. For example, in the case of the above-mentioned earthquake, the maximum seismic intensity is included.

The map display device 2 determines whether or not there is one value (maximum value) indicating the degree of magnitude of the disaster among the values included in the disaster information to be displayed (step A3). When there is one maximum value (step A3 / Yes), the display position of the maximum value is set at the center position of the map (step A4). Next, the display scale of the map to be displayed on the display unit of the user terminal 1 is determined (step A5). For example, in the map display device 2, the display scale is determined according to the disaster information to be displayed based on the display scale predetermined for each disaster information type.

Further, in step A3, when there are a plurality of values indicating the degree of magnitude of the disaster (step A3 / No), a polygon including the display position of each maximum value is created, and the position of the center of gravity of the polygon is set. Set to the center position of the map (step A6).

Next, the map display device 2 calculates a rectangle including polygons, and determines a display scale that can display the map in the calculated rectangle on the display unit of the user terminal 1 (step A7).

Next, the map display device 2 specifies the transmittance corresponding to the above-determined display scale from the transmittance table stored in the transmittance information storage unit 224, and displays the specified transmittance. Set in disaster information (step A8). For example, when the determined display scale is 1/3000, refer to FIG. 3, specify 65%, which is the transmittance corresponding to the display scale of 1/3000, and use the specified 65% transmittance as disaster information. Set to. As a result, disaster information will be displayed on the map with a transmittance of 65%.

Next, the map display device 2 is more than the disaster information to be displayed on the map from the note information included in the map of the display scale determined above based on the map data stored in the map information storage unit 221. Extract the note information to be displayed preferentially. Then, a note layer composed of only the extracted note information is created (step A9).

Further, the map display device 2 creates a background map in which the extracted note information is deleted from the note information included in the map of the determined display scale (step A10).

Next, the map display device 2 uses the information of the map image in which the disaster information of the transmittance set above exists on the background map created above and the note layer created above exists on the disaster information. It is transmitted to the terminal 1 and displayed on the user terminal 1 (step A11).

As shown in FIG. 7, the map display device 2 can display a map image configured in the order of background map → disaster information → note layer on the user terminal 1 by the process of step A11.

<Operation / effect of the map display system of this embodiment>
The map display device 2 of the present embodiment is the center position of a map that displays disaster information according to the number of maximum values (also referred to as values indicating the degree of the greatest degree of disaster) included in the disaster information to be displayed. To make it different. Specifically, when there is one maximum value, the display position of the maximum value is set at the center position of the map. When there are a plurality of maximum values, a polygon including the display position of each maximum value is created, and the position of the center of gravity of the polygon is set at the center position of the map. As a result, when displaying disaster information including information on the point where the magnitude of the disaster is the largest (also called the point with the maximum value) on the map, the suitable center position of the map is determined according to the number of the maximum values. be able to. As a result, the visibility of the map can be improved.

For example, in the present embodiment, when the disaster information to be displayed is an earthquake, the point where the maximum seismic intensity occurs is displayed on the map displayed on the display unit of the user terminal 1. Therefore, when the number of maximum seismic intensity displayed on the map is one, the display position of the maximum seismic intensity is set to the center position of the map displayed on the display unit of the user terminal 1. When there are a plurality of maximum seismic intensity to be displayed on the map, a polygon including the display position of each maximum seismic intensity is created, and the position of the center of gravity of the polygon is displayed at the center of the map displayed on the display unit of the user terminal 1. Set to position. As a result, even if there are multiple points with the maximum seismic intensity to be displayed on the map, the center position of the map to be displayed is set based on each point with the maximum seismic intensity, and the maximum is displayed on the display unit of the user terminal 1. It is possible to display a map containing information on multiple points where seismic intensity has occurred.

Further, in the present embodiment, the note information (also referred to as the note layer) according to the display scale of the map to be displayed on the user terminal 1 is displayed on the map with priority over the disaster information. As a result, the map display device 2 of the present embodiment can improve the visibility of the note information even when the disaster information is displayed on the map.

Further, the map display device 2 of the present embodiment displays disaster information set with a transmittance according to the display scale of the map displayed on the user terminal 1 on the map, and displays note information on the disaster information. .. As a result, the map display device 2 of the present embodiment can improve the visibility of both the disaster information and the note information. For example, when a wide area map is displayed with the map display scale reduced, specific note information is displayed on the disaster information with clear colors, which enhances the visibility of both the disaster information and the note information. be able to. In addition, when the detailed map is displayed with the map display scale increased, specific note information is displayed on the disaster information displayed over a wide area on the map, so both the disaster information and the note information can be visually recognized. You can improve your sex.

<Modification example>
The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment, but various modifications are made without departing from the gist of the present invention. Can be implemented.

(Modification example 1)
In the above-described embodiment, as shown in FIG. 5, a polygon 200 including the display positions 101, 102, and 103 of the maximum values included in the disaster information to be displayed is created, and the position of the center of gravity of the polygon 200 is mapped. It is set to the center position of. However, as shown in FIG. 8, the rectangle 300 including the polygon 200 may be calculated, and the intersection 400 where the diagonal lines of the rectangle 300 intersect may be set at the center position of the map. Also in this case, a suitable center position of the map can be determined according to the number of maximum values included in the disaster information, and the disaster information can be displayed.

(Modification 2)
In the above-described embodiment, the center position of the map for displaying the disaster information is changed according to the number of maximum values included in the disaster information to be displayed. However, when the disaster information is an earthquake, the information on the epicenter is also included, so the center position of the map may be set in consideration of not only the display position of the maximum seismic intensity but also the display position of the epicenter. For example, when the display position of the epicenter is included in the polygon 200 connecting the center coordinates 101, 102, 103 of the maximum seismic intensity shown in FIG. 5, the display position of the epicenter is not considered and the polygon 200 is displayed. Set the position of the center of gravity to the center position of the map. If the display position of the epicenter is not included in the polygon 200 connecting the center coordinates 101, 102, 103 of the maximum seismic intensity, a new polygon including the display position of the epicenter is created and the polygon is created. Set the position of the center of gravity of the map to the center position of the map. As a result, the center position of the map can be set in consideration of the display position of the epicenter.

(Modification example 3)
In the above-described embodiment, the map display device 2 refers to the transmittance table in which the transmittance corresponding to the display scale shown in FIG. 3 is registered, specifies the transmittance corresponding to the display scale of the map to be displayed, and specifies the transmittance. The specified transmittance is set in the disaster information. However, a transmittance table in which the transmittance according to the display scale and the type of disaster information is registered may be used. As a result, the map display device 2 can set not only the map display scale but also different transmittances for each type of disaster information.

(Modification example 4)
In the above-described embodiment, the note information (also referred to as the note layer) according to the display scale of the map displayed on the user terminal 1 is displayed on the map with priority over the disaster information. However, the information to be displayed with priority over the disaster information may be not only the note information but also various drawing information constituting the map such as the boundary line of the administrative division, the road shape, and the river shape. In this case, the drawing information to be displayed with priority over the disaster information may be different depending on the disaster information. For example, when the disaster information is an earthquake or the like, the boundaries and names of administrative divisions are displayed with priority over the disaster information. If the disaster information is flooding of a river, the river shape and river name are displayed with priority over the disaster information. As a result, the drawing information that the user wants to grasp together with the disaster information on the map can be displayed on the map with priority over the disaster information.

(Modification 5)
The control operation of each part constituting the user terminal 1, the map display device 2, and the information providing device 3 of the present embodiment described above can be executed by using hardware, software, or a composite configuration of both. Is.

When executing processing using software, it is possible to install a program that records the processing sequence in the memory in the computer embedded in the dedicated hardware and execute it. Alternatively, it can be installed and executed in a memory in a general-purpose computer that can execute various processes.

For example, the program can be recorded in advance on a hard disk or ROM as a recording medium. Alternatively, the program can be temporarily or permanently recorded on a removable recording medium. Such a removable recording medium can be provided as so-called package software. Examples of the removable recording medium include various recording media such as a magnetic disk and a semiconductor memory.

The program will be installed on the computer from the removable recording medium as described above. In addition, it will be transferred wirelessly from the download site to the computer. In addition, it will be transferred to the computer by wire via the network.

As a form of the program, it can be used from a server on the Internet such as in the cloud. There may be a form in which only a part of the program is transferred to a computer for use.

(Modification 6)
Each part constituting the map display system of the above-described embodiment is not limited to executing the processing in time series according to the processing operation described in the above-described embodiment. For example, it is possible to construct the processing capacity of the device that executes the processing, or to execute the processing in parallel or individually as needed. Further, each function of the map display system of the above-described embodiment may be realized by the cooperation of a plurality of information processing devices, and at least a part of the information stored in the above-mentioned storage units 22 and 32 may be other. It may be stored in the internal / external storage device of the device, and may be built on the cloud, for example.

(Modification 7)
The embodiments described in all or part of the above embodiments are for improving the visibility of the map, improving the processing speed, improving the processing accuracy, improving the usability, improving the function using data, or providing the appropriate function. Providing appropriate data, programs, recording media, devices and / or systems, such as other enhancements or provision of appropriate functions, reduction of data and / or program capacity, miniaturization of devices and / or systems, and data. , Reduction of production / manufacturing cost of programs, devices or systems, facilitation of production / manufacturing, shortening of production / manufacturing time, etc. Solve one problem.

1 User terminal 11 Control unit 12 Storage unit 13 Input / output unit 14 Position information acquisition unit 2 Map display device 21 Control unit 211 Information acquisition unit 212 Information extraction unit 213 Information reception unit 214 Map display control unit 22 Storage unit 221 Map information storage Unit 222 Route information storage unit 223 Disaster information storage unit 224 Permeability information storage unit 3 Information provider 31 Control unit 32 Storage unit NW network

Claims (6)

A memory means to memorize the map and
An acquisition method for acquiring seismic information including at least the maximum seismic intensity,
It has a display control means that superimposes the earthquake information on the map and displays it on the display means.
The display control means is a map display device characterized in that the center position of the map to be displayed on the display means is changed according to the number of maximum seismic intensities included in the earthquake information. When the maximum seismic intensity is one, the display control means sets the display position of the maximum seismic intensity to the center position, and when there are a plurality of maximum seismic intensity, a polygon including the display position of each maximum seismic intensity is created. The map display device according to claim 1, wherein the position of the center of gravity of the polygon is set to the center position. 2. The display control means according to claim 2, wherein the display control means calculates a rectangle including the polygon, and displays the map in the rectangle on the display means at a scale that can be displayed on the display means. Map display device. A memory means to memorize the map and
An acquisition method for acquiring disaster information including at least a value indicating the degree of disaster magnitude,
It has a display control means that superimposes the disaster information on the map and displays it on the display means.
The display control means changes the center position of the map to be displayed on the display means according to the number of the values indicating the degree of the magnitude of the disaster among the values included in the disaster information. , A map display device characterized by that. This is the method used by map display devices.
The acquisition process to acquire seismic information including at least the maximum seismic intensity,
The map display device performs a display control step of superimposing the earthquake information on a map and displaying it on a display means.
The display control step is a method characterized in that the center position of the map displayed on the display means is changed according to the number of maximum seismic intensities included in the earthquake information. A program that is executed by the computer of the map display device.
Acquisition process to acquire seismic information including at least the maximum seismic intensity,
The computer is made to execute the display control process of superimposing the earthquake information on the map and displaying it on the display means.
The display control process is a program characterized in that the center position of the map displayed on the display means is changed according to the number of maximum seismic intensities included in the earthquake information.

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