JP2020134702A - Device, method, and program for map display - Google Patents

Abstract

To increase the visibility of a map.SOLUTION: A map display device (2) according to an embodiment includes: map storage means (221) for storing a map to be displayed in a display unit (1), in relation to the display scale of the map; acquisition means (211) for acquiring area information on a specific area on the map; extraction means (212) for extracting drawing information to be displayed preferentially to the area information from the drawing information in the map; acceptance means (213) for accepting the display scale of the map to be displayed in the display unit (1); and map display control means (214) for specifying the map of the accepted display scale and the drawing information extracted from the map, and displaying, in the display unit (1), a map image in which the area information is present on the specified map and the specified drawing information is present on the area information.SELECTED DRAWING: Figure 1

Description

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

In recent years, there is a map display device that superimposes and displays area information related to a specific area such as weather information and disaster information on a map. The area information is superimposed on the map as an image having a constant transmittance.

However, when the area information is superimposed and displayed on the map with a constant transmittance, the visibility of the area information and the map may not be ensured depending on the display scale of the map. For example, when a wide area map or the like is displayed with the map display scale reduced, it may be difficult to see the area information at a certain transmittance. On the contrary, when the map display scale is increased to display a detailed map or the like, it may be difficult to see the map under the area information at a certain transmittance.

In order to solve the above problem, for example, in Patent Document 1, the transmittance of the area information superimposed and displayed on the map is set so as to increase as the map display scale increases, and the area information is set by the set transmittance. Is superimposed and displayed on the map image. As a result, when the detailed map is displayed by increasing the display scale of the map, the transmittance of the area information is increased and the map under the area information can be easily seen. Further, when the wide area map is displayed with the map display scale reduced, the transmittance of the area information is lowered and the area information can be easily seen.

JP-A-2017-68168

Patent Document 1 changes the transmittance of the area information superimposed and displayed on the map according to the display scale of the map so as not to interfere with the visibility of the map. However, it may be difficult to see drawing information such as note information included in the map simply by changing the transmittance. For example, when displaying a wide area map, the transmittance is lowered and the area information is superimposed and displayed on the map, so that the visibility of the area information is improved, but the drawing information existing under the area information becomes difficult to see. In addition, when displaying a detailed map, the transmittance is increased and the area information is superimposed and displayed on the map, so the visibility of the map under the area information is better than before, but on the drawing information included in the map. Since the area information is superimposed and displayed on the map, the drawing information existing under the area information may appear dim and the drawing information may be difficult to see.

The present invention solves at least a part of the above-mentioned problems, and can be realized as the following forms.

The map display device according to one aspect of the present invention is
A map display device that displays a map on the display unit.
A map storage means for storing the map to be displayed on the display unit in association with the display scale of the map.
An acquisition means for acquiring area information regarding a specific area on the map, and
An extraction means for extracting drawing information to be displayed with priority over the area information from the drawing information included in the map.
A reception means that accepts the display scale of the map to be displayed on the display unit,
The map corresponding to the received display scale and the drawing information extracted from the map are specified, the area information exists on the specified map, and the specified drawing information exists on the area information. A map display control means for displaying a map image on the display unit,
It is characterized by having.

It is a figure which shows the configuration example of the map display system. It is a figure which shows precipitation in the meteorological information which is an example of area information. 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 1st Embodiment. It is a figure which shows the configuration example of the map which is displayed on the user terminal 1. It is a figure which shows the processing operation example of the 2nd Embodiment.

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.

(First Embodiment)
<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 is a device that provides area information such as traffic information, disaster information, weather information, and river information to the map display device 2. Examples of the information providing device 3 include 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 divides various area information such as traffic information, disaster information, weather information, and river information related to a specific area on the map into area units and stores them in the storage unit 32, and stores the storage unit 3. Various area information stored in 32 is provided to the map display device 2 in area units. Examples of traffic information include information such as traffic congestion information and traffic regulation information. Disaster information includes information such as tsunamis, earthquakes, typhoons, landslides, and tornadoes. Meteorological information includes, for example, rain clouds, weather (fine, cloudy, rain, etc.), precipitation, precipitation probability, maximum temperature, minimum temperature, ultraviolet intensity, pollen scattering amount, snowfall amount, sunshine duration, total solar radiation amount, wind speed. Information such as can be given. Examples of river information include information such as flood occurrence information and water level information. As the area information, not only the current information but also the past and future information is stored in the storage unit 32 in chronological order.

FIG. 2 is a diagram showing the amount of precipitation among the meteorological information stored in the storage unit 32. As shown in FIG. 2, the information providing device 3 divides the map information into mesh units of 1 km square, and stores the precipitation amount of the mesh in association with each mesh in the storage unit 32. For example, in the example shown in FIG. 2, mesh A shows that the current precipitation is 0 mm, the predicted precipitation after 10 minutes is 1 mm, and the predicted precipitation after 20 minutes is 2 mm. Similarly, the predicted precipitation amount up to a predetermined time (for example, after 3 hours) is stored in units of 10 minutes. The information providing device 3 can provide various area information to the map display device 2 in mesh units by dividing various area information into mesh units and storing and managing them in the storage unit 32. The mesh unit is not limited to 1 km, and can be divided into arbitrary units such as 250 m. Further, the area information can be managed by dividing it into a plurality of units such as 250 m mesh and 1 km mesh. Further, the area information can be managed not by dividing into mesh units but by various area units such as administrative divisions (city, ward, town, village, large character, town street name, small character, block) polygon unit.

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 latitude and longitude of the center point of the map to be displayed, the display scale, and the type of area information to be displayed on the map, sends a map display request to the map display device 2, and maps. The information of the map to be displayed is acquired from the display device 2, and the map is displayed on the user terminal 1 via the input / output unit 13. As the latitude and longitude of the center point of the map to be displayed, the position information acquired by the position information acquisition unit 14 may be used. 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 map enlargement / reduction operation, the user terminal 1 changes the map display range. When the user terminal 1 accepts the display switching operation of the area information type.

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 detects the detected current position data (latitude, Get longitude and height data). 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 (PDR: Dead reckoning) or the like.

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.

In addition to controlling each unit of the map display device 2, the control unit 21 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 various area information such as traffic information, disaster information, weather information, and river information from the information providing device 3 on an area-by-area basis. The information acquisition unit 211 stores the acquired various area information in the area information storage unit 223, which will be described later.

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 area 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 area information. For example, when the type of area information is traffic information, etc., note information regarding the road name is extracted. In the case of disaster information, etc., extract note information about prefecture names, city / ward / town / village names, and station names. In the case of river information, etc., note information about river names is extracted. As a result, the note information related to the area information can be displayed on the map with priority over the area 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 (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 area information type. The area information type is information for identifying the type of area 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 latitude and longitude of the center point of the map to be displayed, the display scale, and the type of area information to be displayed on the map.

The map display control unit 214 specifies the map display scale and the type of area information included in the map display request received by the information reception unit 213. Further, the map display control unit 214 displays the map provided to the user terminal 1 based on the latitude / longitude of the center point of the display target map included in the map display request received by the information reception unit 213, the display scale, and the like. Specify the range. The display range of the specified map is preferably an area (display range + buffer) larger than the display range of the user terminal 1 by a certain range. 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 is the area information of the specified type from the various area information stored in the area information storage unit 223, and the area information included in the display range of the specified map. Is extracted. Further, the map display control unit 214 specifies the transmittance corresponding to the specified display scale from the transmittance table stored in the transmittance information storage unit 224 described later, and sets the specified transmittance as described above. Set in the extracted area information. Further, the map display control unit 214 sets the display color according to the type of the extracted area information and the content of the area information in the area information. For example, if the type of area information is meteorological information and the content of the area information is precipitation, set as follows.

For areas with precipitation of 80 mm or more, the purple display color is set in the area information. For areas where the amount of precipitation is 50 mm or more and less than 80 mm, the red display color is set in the area information. For areas of 30 mm or more and less than 50 mm, the yellow display color is set in the area information. For areas of 20 mm or more and less than 30 mm, the dark blue display color is set in the area information. For areas of 10 mm or more and less than 20 mm, the blue display color is set in the area information. For areas larger than 0 mm and less than 10 mm, the light blue display color is set in the area information. As a result, the map display control unit 214 can set the display color in the area information according to the amount of precipitation in each area.

Further, the map display control unit 214 acquires the background map and the note layer corresponding to the above-specified display scale and area information type 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 area 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 area 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, an area information storage unit 223, and a transmittance information storage unit 224.

As shown in FIG. 3, 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 (1 / 1.5 million), nationwide (1 / 1.5 million) It is stored in association with the display scale of 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. 3, 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 area information type. In FIG. 3, traffic information, disaster information, and weather information are shown as area information types, but more detailed traffic information, traffic regulation information, tsunami, earthquake, typhoon, precipitation, etc. than the above information are shown as area information. It may be a 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 (travel time) as the link cost. Road network data is stored for each means of transportation (walking, car, bicycle, etc.).

The area information storage unit 223 stores various area information acquired by the information acquisition unit 211 in area units.

The transmittance information storage unit 224 stores the transmittance table. As shown in FIG. 4, 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. 5 is a diagram showing an example of map display processing operation.

Based on the map data stored in the map information storage unit 221, the map display device 2 extracts the note information to be displayed with priority over the area information to be displayed on the map from the note information included in the map. To do. Then, a note layer composed of only the extracted note information is created and stored in the map information storage unit 221 (step S1). The map display device 2 stores the created note layer in the map information storage unit 221 in association with the display scale and the area information type.

Further, the map display device 2 creates a background map in which the above-extracted note information is deleted from the note information included in the map, and stores it in the map information storage unit 221 (step S2). The map display device 2 stores the created background map in the map information storage unit 221 in association with the display scale and the area information type. As a result, the map information storage unit 221 stores the information shown in FIG.

Next, when the map display device 2 receives the map display request from the user terminal 1 (step S3 / Yes), the map display device 2 specifies the map display scale and the type of area information included in the display request. Further, the display range of the map provided to the user terminal 1 is specified based on the latitude / longitude of the center point of the display target map included in the display request, the display scale, and the like (step S4).

Next, the map display device 2 is the area information of the specified type from the various area information stored in the area information storage unit 223, and the area information included in the display range of the specified map. Is extracted (step S5).

Next, the map display device 2 specifies the transmittance corresponding to the specified display scale from the transmittance table stored in the transmittance information storage unit 224, and extracts the specified transmittance. Set in the area information (step S6).

Next, the map display device 2 refers to the map information storage unit 221 and acquires a background map and a note layer corresponding to the specified display scale and area information type from the map information storage unit 221 (step S7).

Next, the map display device 2 uses the information of the map image in which the area information of the transmittance set above exists on the acquired background map and the acquired note layer exists on the area information. It is transmitted to the terminal 1 and displayed on the user terminal 1 (step S8).

As shown in FIG. 6, the map display device 2 can display a map image configured in the order of background map → area information → note layer on the user terminal 1 by the process of S8.

<Action / effect of the map display system of this embodiment>
The map display device 2 of the present embodiment displays the note information (note layer) according to the display scale of the map displayed on the user terminal 1 on the map with priority over the area information. As a result, the map display device 2 of the present embodiment can improve the visibility of the note information even when the area information is displayed on the map.

Further, the map display device 2 of the present embodiment displays the area information set by the transmittance according to the display scale of the map displayed on the user terminal 1 on the map, and displays the note information on the area information. .. As a result, the map display device 2 of the present embodiment can improve the visibility of both the area information and the note information. For example, when a wide area map is displayed with the scale of the map reduced, specific note information is displayed on the area information with clear colors, so the visibility of both the area information and the note information should be improved. Can be done. In addition, when the detailed map is displayed by increasing the scale of the map, specific note information is displayed on the area information displayed over a wide area on the map, so that the visibility of both the area information and the note information is visible. Can be enhanced.

(Second Embodiment)
Next, the second embodiment will be described.

In the first embodiment, as shown in FIG. 5, when a note layer and a background map are created in advance and stored in the map information storage unit 221 (steps S1 and S2) and a map display request is received. (Step S3 / Yes), the map information storage unit 221 is referred to, and the note layer and the background map corresponding to the display request are acquired (step S7).

In the second embodiment, as shown in FIG. 7, when the map display request is received (step A1 / Yes), the note layer and the background map are created (steps A5 and A6). As a result, as shown in FIG. 6, in the order of background map → area information → note layer, even if the note layer and the background map are not created in advance and stored in the map information storage unit 221 as in the first embodiment. The map image composed of the above can be displayed on the user terminal 1.

<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-mentioned 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, the map display device 2 refers to the transmittance table in which the transmittance corresponding to the display scale shown in FIG. 4 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 area information. However, a transmittance table in which the transmittance according to the display scale and the area information type 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 area information type.

(Modification 2)
In the above-described embodiment, the note information (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 area information. However, the information to be displayed preferentially over the area 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 area information may be different depending on the area information. For example, when the area information is disaster information, meteorological information, etc., the boundaries and names of administrative divisions are displayed with priority over the area information. When the area information is traffic information, the road shape, road name, etc. are displayed with priority over the area information. When the area information is river information, the river shape, river name, etc. are displayed with priority over the area information. As a result, the drawing information that the user wants to grasp together with the area information on the map can be displayed on the map with priority over the area information.

(Modification 3)
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. It will also be wirelessly transferred from the download site to your 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 net 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 example 4)
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.

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 Area information storage unit 224 Permeability information storage unit 3 Information providing device 31 Control unit 32 Storage unit NW network

Claims (7)

A map display device that displays a map on the display unit.
A map storage means for storing the map to be displayed on the display unit in association with the display scale of the map.
An acquisition means for acquiring area information regarding a specific area on the map, and
An extraction means for extracting drawing information to be displayed with priority over the area information from the drawing information included in the map.
A reception means that accepts the display scale of the map to be displayed on the display unit,
The map corresponding to the received display scale and the drawing information extracted from the map are specified, the area information exists on the specified map, and the specified drawing information exists on the area information. A map display control means for displaying a map image on the display unit,
A map display device characterized by having. The map display device according to claim 1, wherein the drawing information extracted from the map differs depending on the area information. The map display device according to claim 1 or 2, wherein the drawing information included in the map differs depending on the display scale of the map. The map display control means
Any of claims 1 to 3, wherein the transmittance of the area information displayed on the map is set so as to increase as the scale increases according to the display scale of the specified map. The map display device described in. The map display control means
The map display device according to any one of claims 1 to 4, wherein the map is displayed after the extracted drawing information is deleted from the drawing information included in the map. This is the method used by the map display device that displays the map on the display unit.
The acquisition process for acquiring area information related to a specific area on the map, and
An extraction step of extracting drawing information to be displayed with priority over the area information from the drawing information included in the map.
The reception process that accepts the display scale of the map to be displayed on the display unit,
The map corresponding to the received display scale and the drawing information extracted from the map are specified, the area information exists on the specified map, and the specified drawing information exists on the area information. A map display control process for displaying a map image on the display unit,
A method, characterized in that the map display device performs the above. A program that is executed by the computer of the map display device that displays the map on the display unit.
The acquisition process for acquiring area information related to a specific area on the map, and
Extraction processing that extracts drawing information to be displayed with priority over the area information from the drawing information included in the map, and
Reception processing that accepts the display scale of the map to be displayed on the display unit,
The map corresponding to the received display scale and the drawing information extracted from the map are specified, the area information exists on the specified map, and the specified drawing information exists on the area information. Map display control processing that displays a map image on the display unit,
A program, characterized in that the computer is executed.

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