JP5824682B2 - Scale display control device - Google Patents

Description

  The present invention relates to a variable scale display control device for creating a map display image by changing the scale of standard map information according to a predetermined display condition, and transmitting the map display image to a client device for display. Is.

  In recent years, it has become possible to easily display a map including various information on a client device that can be connected to the Internet (Patent Documents 1, 2, etc.). The various information includes all information displayed on the map such as place names represented by characters and symbols, facilities, and regional information.

JP 2008-216841 A JP 2011-123086 A

  However, since the map that is normally displayed is a standard map that faithfully reflects the actual area ratio, information cannot be confirmed without zooming in on the location where the information to be displayed is dense. In many cases, it takes time and effort for the user to perform an enlargement operation. As a result, an event that the enlargement operation is not executed depending on the user occurs, and there is a high possibility that information will be missed. In addition, since it is difficult to visually recognize the density ratio in an information-dense area, an event of recognition at an incorrect density ratio occurs, resulting in missed information. The possibility is high. Therefore, it is necessary to prevent the information from being overlooked due to the complicated operation and the difficulty of visual recognition for the user.

  In view of the above situation, according to the present invention, since the map display is displayed at a constant scale according to the actual area ratio, specific information is concentrated in an area where the area ratio is low, and the information is visually decoded. It is an object of the present invention to provide a map display control device that can avoid missing information due to difficulty.

In order to achieve the above object, the present invention provides a variable scale map display control apparatus that controls each part (unit of division) of a standard map to be changed and displayed at an appropriate scale according to display conditions. I will provide a.
A display control device for a variable scale map according to the present invention is a display control device that performs processing of creating a map display image for display on a client device and transmitting the map display image to the client device.
A first database storing map information of a standard map for each division unit obtained by dividing the entire map display image into a plurality of divisions according to a predetermined division;
A second database in which each of a plurality of display conditions is associated with the classification and stored;
A third database that sets and stores a condition value when the division unit becomes a display target for each division unit for one display condition;
Receiving designation of display conditions from the client device, obtaining a corresponding category of the second database based on the received display condition, and including in the category from the first database based on the obtained category Means for obtaining all map units of all the display objects,
Means for creating a map display image of a standard map based on all the acquired map information and transmitting it to the client device;
Information on the display target of the start point specified in the map display image of the standard map is received from the client device, the third database is referred to based on the received display target of the start point, and the display target of the start point Means for calculating the ratio between the condition value of each and the other condition values of the display objects,
Means for respectively changing the scale of the map information corresponding to each of the display objects based on the calculated ratio;
Means for creating a map display image whose scale has been changed based on all the map information whose scales have been changed and transmitting the map display image to the client device.

According to the display control apparatus for a variable scale of the present invention, information can be easily recognized from a map display image even when information is concentrated in an area having a low area ratio.
The effects of the present invention are summarized as follows.
(1) Depending on the user's purpose, each map unit of the standard map is changed to an appropriate scale according to the display conditions, and a map display image is created and displayed, so that information can be easily grasped visually. Therefore, it is possible to reduce missed information.
(2) Since the user can specify a division unit such as a prefecture that is the starting point of the scale changing process, the user can select a starting point according to the user's needs and scale it at a predetermined ratio based on this. Correspondence becomes possible.

FIG. 1 is a system configuration diagram schematically showing an example of an embodiment of the present invention. FIG. 2 is a schematic configuration diagram of an example of the map information database. FIG. 3 is a schematic configuration diagram of an example of a display value table in the display condition database. FIG. 4 is a schematic configuration diagram of an example of a display condition table in the display condition database. FIG. 5 is a schematic configuration diagram of an example of a display target list table in the display condition database. FIG. 6 is a schematic diagram of a message between the client device and the host device. FIG. 7 is a schematic configuration diagram of an example of the display order list. FIG. 8 is a schematic sequence diagram between the client device and the host device. FIG. 9 is a detailed flow of the standard map information acquisition process of FIG. FIG. 10 is a detailed flow of the display scale information calculation and transmission information creation processing of FIG. FIG. 11 shows an example of a screen displayed on the client device.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a variable scale display control apparatus according to the present invention will be described with reference to the drawings showing an example of an embodiment to which the present invention is applied.

  FIG. 1 is a system configuration diagram schematically showing an example of an embodiment of the present invention. The system includes a host device 1 and a map display client device (hereinafter referred to as “client device”) 10.

  The host device 1 has a function as a map display control device with a variable scale. The main function of the host device 1 is to create a map display image by changing the scale of standard map information according to a predetermined display condition, and transmit the created map display image to the client device 10. The client device 10 transmits map display image display conditions and the like to the host processing device 1, receives the map display image whose scale has been changed from the host processing device 1, and displays the map display image on a display device (not shown). The host device 1 and the client device 10 can be connected via the public Internet network 9.

  The host device 1 can be implemented by an appropriate computer, and a function of each processing unit described later is realized by a built-in CPU reading and executing a predetermined program in a memory. The client device 10 can be implemented by various terminals such as a normal client PC 7 and a mobile terminal 8 such as a tablet terminal.

The host device 1 includes a map information database 5 and a display condition information database 6.
In the map information database 5, for example, in the case of a Japanese map, the map information of a standard map (a normal map having a constant scale as a whole) necessary for map display such as area, latitude, longitude, etc. is divided based on various categories. It is registered for each map of the specified division unit.
In the display condition information database 6, display conditions for creating a map display image whose scale has been changed are registered.

The host device 1 includes a map information management unit 2, a map display image creation diagram 3, and a map display processing unit 4 as a processing unit that implements a function as a variable scale display control device.
The map information management unit 2 performs processing such as acquisition and update management of map information from the map information database 5.
The map display image creation unit 3 generates a map display image that has been subjected to a predetermined scale change based on the start point and display conditions specified by the client device 10 and the details of the display conditions registered in the display condition information database 6. create.
The map display processing unit 4 transmits the map display image created by the map display image creation unit 3 to the client device 10, or information on the starting point and display conditions for changing the scale of the map display image from the client device 10. Receive.

  FIG. 2 is a schematic configuration diagram of an example of the map information database 5 shown in FIG. As the map information of each table, basic information including a division unit 51, a main government office location name 52, and a latitude 53 and a longitude 54 of a starting point location (prefecture office location in this example) used in creating a map display image, and a map Registration / update date / time 55 of information update date / time, classification 56 indicating the target map granularity when performing map scale setting, and other data 57 necessary for map display are registered. For example, the classification unit 51 is “Kanagawa Prefecture”, the main government office location name 52 is “Yokohama City”, the latitude 53 is “north latitude 35 degrees 26 minutes”, the longitude 54 is “east longitude 139 degrees 39 minutes”, and the registration / update date Is “April 1, 2012”, and the category 56 is “Prefecture”.

  The map information registered in the table of FIG. 2 is the map information of the standard map, and is used as it is to display the standard map before the scale change or relative information when displaying the map after the scale change. Used as basic information.

The division 56 represents a reference for dividing the entire displayed map display image into a plurality of units. In the category 56, in addition to “prefecture”, categories such as “region” and “country” can be set. When the division 56 is “region”, a map of Japan with the region of Japan (Kanto, Kansai, etc.) as a unit is displayed.
Each of a plurality of units divided according to the contents of the division 56 is a division unit 51. When the division 56 is “region”, the division unit 51 is “Kansai region” or “Kanto region”.
The division unit 51 is a unit that is a target of the scale changing process according to the present invention, and is referred to as a “display target” when extracted as a target of the scale changing process described below.

  FIG. 3 is a schematic configuration diagram of an example of a display value table included in the display condition information database 6 shown in FIG. In the display value table, a display condition 61 indicating a condition for creating a scale-changed map display image, a display object 62 indicating the name of a division unit to be displayed, and the display object assigned to the display condition are assigned. A condition value 63, which is a value, and other data 64 necessary for map display are registered. For example, the display condition 66 is “population density (prefecture)”, the display object 62 is “Hokkaido”, and the condition value 63 is “66”. The condition value is used for calculation when creating a map display image by changing the scale of the standard map. For example, when the display condition is “population density (prefecture)”, a value reflecting the level of the population density of each prefecture is assigned as the condition value. In that case, it is not always necessary to set a value that is exactly proportional to the population density. Since the scale-changed map display image created in the present invention is only for the purpose of making information easy to see, the condition value is set in consideration of this purpose.

  FIG. 4 is a schematic configuration diagram of an example of the display condition table included in the display condition information database 6 shown in FIG. The display condition table includes a display condition X 161 (X: an integer of 1 or more) for specifying one of a plurality of display conditions, a section 162 indicating a section related to the display condition, and other display conditions. Related data 163 is registered. For example, the display condition 1 161 is “population density (prefecture)”, and the section 162 is “prefecture”.

  FIG. 5 is a schematic configuration diagram of an example of a display target list table included in the display condition information database 6 shown in FIG. In the display target list table, when one display condition X 161 of the display condition table of FIG. 4 is designated, the display condition 164 and a display target YY 165 (YY: 1 or more) composed of one or a plurality of display targets List) is registered.

In creating the list, a classification (for example, “prefecture”) corresponding to the display condition X 161 (for example, “population density (prefecture)”) is acquired with reference to the display condition table of FIG. 4, and based on the acquired classification. The map information database shown in FIG. 2 is referred to, and all corresponding division units are acquired, and a list is created with each of these division units as a display target YY.
For example, when the display condition 164 is “population density (prefecture)”, the display target 1, the display target 2,..., The display target YY are “Hokkaido”, “Aomori” ... “Okinawa”.

  FIG. 6 is a schematic diagram illustrating an example of a message transmitted and received between the client device and the host device. (A) is a display condition, (b) is a map display classification designation command, (c) is a map display result, and (d) is a message of a start point designation command. The display condition message (a) and the map display result message (c) are transmitted from the host device to the client device. Messages of the map display category designation command (b) and the start point designation command (d) are transmitted from the client device to the host device.

  The display condition message in FIG. 6A is a message for transmitting a display condition list created based on the display condition table held in the display condition information database of the host apparatus to the client apparatus. The display condition list is a list of all display conditions that can be selected. This message frame includes a header “display condition” 201 indicating that it is a display condition message, a display condition list 202 that is a list of display conditions that can be specified as a display condition, and a display that identifies one display process. It consists of ID 203 and user ID 204 that identifies the client device. Here, “one-time display process” refers to a series of processes from creating a map display image subjected to one scale change process to displaying it on the client device.

  The map display condition designation command message in FIG. 6B transmits the display condition selected by the client device from the display condition list displayed on the screen of the client device display device according to the display condition message in FIG. 6A to the host device. Message. The frame of this message includes a header “map display condition designation command” 211 indicating that it is a command for designating a display condition, a designated display condition 212, a display ID 213 for specifying one display process, and a client device. The user ID 214 for specifying For example, the display condition 212 is “population density (prefecture)” or “population density (region)”.

  Based on the display conditions specified by the above command, the host device first displays the segment units included in the segments that match the specified display conditions, and maps all standard maps corresponding to these segment units. Extract from information database. Further, the display target list table of FIG. 5 is created based on the designated display conditions. Next, the host device transmits the map display image of the extracted standard map from the host device to the client device using the map display result message of (c).

  The frame of the map display result message in FIG. 6C includes a header “map display result” 221 indicating map display result information, position identification information 222 which is a map display image of a standard map, and one display. It consists of a display ID 223 that identifies the process and a user ID 224 that identifies the client device.

  The start point designation command message in FIG. 6 (d) is a segment unit designated by the client device as the start point on the standard map from the standard map displayed on the display screen of the client device by the map display result message in (c). This is a command for transmitting the information to the host device. This message frame includes a header “start point specification command” 231 indicating that the command is a command for specifying a start point, a specified start point 232, a display ID 233 for specifying one display process, and a user for specifying a client device. It consists of ID234.

  Based on the start point designated by the start point designation command message in FIG. 6 (d) and the display conditions designated by the map display condition designation command message in FIG. 6 (b), the host device displays the map information of the standard map. Create a map display image that has been scaled. The map display image created as a result is transmitted again to the client device using the map display result message in FIG.

  In creating a map display image with a reduced scale, the creation order of map display images for each display target registered in the display target list table of FIG. 5 created based on the designated display conditions is determined. It will be necessary. The list for that is a display order list, and FIG. 7 shows a schematic configuration diagram of an example thereof.

  FIG. 7 is a schematic configuration diagram of an example of a display order list to be displayed. This table includes a display target name 601, a display name 602, and a processing order 603. The processing order 603 sets a processing order in which the scale changing process is performed on each standard map of a plurality of display objects. In order to determine the processing order, first, in the table, the display target registered in the upper row than the display target row designated as the start point is given an order incremented by one in order. When the display target is searched and numbering up to the top line is completed, the process returns to the starting point again. Next, the display object registered in the lower row from the starting point row is given an order incremented by one in order. When the number assignment is completed up to the lowest line to be displayed, the number assignment process is terminated.

  FIG. 8 is a schematic sequence between the client device and the host device. An initial screen activation request is made by the client device (301). The host device acquires a display condition list from the display condition information database (302), and transmits an initial screen to the client device using a display condition message (FIG. 6A).

  The client device that has acquired the initial screen including the display condition list displays the display condition list in the pull-down menu on the display condition selection screen (303). One display condition selected from the pull-down menu in the client device is transmitted to the host device by a map display condition designation command message (FIG. 6B).

  Based on the designated display conditions, map information of all corresponding standard maps is acquired from the map information database (304), and the acquired map display image of the standard map is displayed in a map display result message (FIG. 6 (c)). To the client device.

  The client device that acquired the map display result displays a map display image of the standard map on the screen of the display device of the client device (305). The display target information (306) of the start point selected from the displayed standard map is transmitted to the host device by the start point designation command message (FIG. 6 (d)). Based on the start point and display conditions, the host device that acquired the display target information that is the starting point performs a predetermined calculation for changing the scale for each standard display target map, and displays the scale-changed map display image. Create (307). The map display image creation result is transmitted to the client device by a map display result message (FIG. 6C). The client device that has acquired the map display result message displays the scale-changed map display image on the screen of the client device display device (308).

FIG. 9 is a flowchart showing details of the process of step 304 in FIG. 8 (acquisition of map information of a standard map based on display conditions).
A map display condition designation command message (FIG. 6B) is received from the client device, and the designated display condition is acquired (401). Based on the designated display condition, the corresponding category is acquired in the display condition table of FIG. 4 (402). Based on the acquired classification, the map information of the standard map of all classification units corresponding to the classification is acquired from the map information database of FIG. 2 (403). (Although not shown, all the classification units acquired at this time are determined as display targets, and the display target list table in FIG. 5 is also created.) Map display image generated from map information of acquired standard map The result message (FIG. 6C) is transmitted to the client device.

FIG. 10 is a process flow diagram showing details of the process of step 307 in FIG. 8 (creating a map display image whose scale has been changed based on the start point and display conditions).
A start point designation command message (FIG. 6 (d)) is received from the client device, information on the display target serving as the start point is acquired, and the display target designated as the start point is determined (501). Next, the display order list of FIG. 7 is created based on the start point and the display target list table of FIG. 5 (502).

  The display target map information set in the display target list table is acquired from the map information database according to the processing order of the display order list of FIG. 7 (503). The condition value of the display target that is the processing target is acquired from the display value table (FIG. 3) of the display condition information database (504). Then, the ratio between the condition value of the display target specified at the start point and the condition value of the display target that is the processing target is calculated (505).

  Next, the display position of the starting point of the display target that is the processing target is set based on the latitude and longitude of the map information database in FIG. 2, and the display area of the display target that is the processing target is calculated in step 503. (506). The display area on the standard map is changed by multiplying this ratio, and the scale on the standard map is thereby changed. For the display target specified at the start point, only the display position of the start point may be set (no change in scale is required). That is, the scale of the display target specified at the starting point is set to 1, and the scales of other display targets are changed at a ratio calculated based on the condition value.

  Subsequently, the processing order number is compared with the last number, and it is determined whether or not the scale change processing has been completed for all the display targets YY in the display target list table (507). If the map has been processed, a map display result message (FIG. 6C) is set and the scaled map display image is transmitted to the client device (509). When the processing has not been completed, the processing order is incremented by 1, and the display target that is the next processing target is set (508), and then the processing of 503 is performed again.

  FIG. 11 shows an example of a screen displayed on the client device. The display condition selection screen 601 is a screen displayed in step 303 of FIG. 8 and displays a pull-down menu for selecting display conditions.

  A screen denoted by reference numeral 602 is a screen that displays a map display image of a standard map after selecting display conditions. In this screen, the scale of each display object (each division unit) is constant. One display object (section unit) that is the starting point is selected on the screen denoted by reference numeral 602.

  A screen denoted by reference numeral 603 is a screen that displays a map display image whose scale has been changed after the scale change processing has been performed after the selection of one display target (unit of division) as a starting point. In this screen, the scale of each display target (each division unit) is variously changed.

DESCRIPTION OF SYMBOLS 1 Host apparatus 2 Map information management part 3 Map display image preparation part 4 Map display process part 5 Map information database 6 Display condition information database 7 Client PC
8 Mobile terminal 10 Map display client device

Claims (1)

In a display control device that performs processing for creating a map display image for display on a client device and transmitting the map display image to the client device,
A first database storing map information of a standard map for each division unit obtained by dividing the entire map display image into a plurality of divisions according to a predetermined division;
A second database in which each of a plurality of display conditions is associated with the classification and stored;
A third database that sets and stores a condition value when the division unit becomes a display target for each division unit for one display condition;
Receiving designation of display conditions from the client device, obtaining a corresponding category of the second database based on the received display condition, and including in the category from the first database based on the obtained category Means for obtaining all map units of all the display objects,
Means for creating a map display image of a standard map based on all the acquired map information and transmitting it to the client device;
Information on the display target of the start point specified in the map display image of the standard map is received from the client device, the third database is referred to based on the received display target of the start point, and the display target of the start point Means for calculating the ratio between the condition value of each and the other condition values of the display objects,
Means for respectively changing the scale of the map information corresponding to each of the display objects based on the calculated ratio;
A scale-variable map display control apparatus comprising: means for creating a map display image whose scale has been changed based on all the map information whose scales have been changed and transmitting the map display image to the client device.

Images