JP7153819B1 - Image display device, image display method, and image display program - Google Patents

Abstract

An object of the present invention is to check the shape and state of a feature desired by a user from multiple viewpoints.
A map server (10) includes a first receiving unit (11) that receives an input of a display target position specified by a user (U) on a base map displayed on a user terminal (20) from the user terminal (20), and a first receiving unit (11) that receives from the user terminal (20) an input of a display target position, each of which includes a display target position. and a first display processing unit 12 for generating a plurality of identification information for identifying a plurality of unit orthoimages from mutually different viewpoints and displaying them on the user terminal 20; The user terminal 20 is provided with a unit orthoimage identified by the selected identification information, which is the identification information selected by the user from the identification information.
[Selection drawing] Fig. 1

Description

The present disclosure relates to an image display device, an image display method, and an image display program.

In Patent Document 1, a plurality of orthographic projection images are formed by converting a plurality of numerical photographs obtained by digitizing aerial photographs from central projection to orthographic projection, and image processing is performed on the plurality of orthographic projection images. Techniques for obtaining digital orthophotos by performing processing such as digital processing for combining are disclosed.

JP 2006-195032 A

Such digital orthoimages may be used, for example, to confirm the shape and condition of features, such as in fixed asset operations. The fixed asset business is the business of accurately grasping the status of property taxable objects such as land and houses. A house in the fixed assets business is one that satisfies the requirements such as a roof and outer walls on three or more directions surrounded by durable materials. As a general rule, fixed asset operations require annual on-site confirmation, but confirmation by aerial photographs may be substituted. At this time, it is conceivable to use, for example, the above-mentioned digital orthorectified image.

However, as described above, mosaic processing is intervened when creating a digital orthoimage (or a simple orthoimage (hereinafter the same)). Mosaic processing is the work of using a plurality of unit orthorectified images and using a range close to the center of the photograph where features are as few as possible to make them seamless. For this reason, it is difficult to confirm whether or not the roof has an outer wall as described above by confirming the collapse of the feature (by viewing the feature from the side) in the digital orthoimage. In such a case, it is necessary to check the site, which is troublesome for the user. In order to avoid such troubles, it is desirable to develop a technique that allows confirmation of the shape and state of a feature on an image from multiple viewpoints.

An object of the present disclosure is to provide an image display device, an image display method, and an image display program that enable the user to check the shape and state of a feature desired to be grasped from multiple viewpoints.

An image display device according to the present disclosure includes a first receiving unit that receives input from a user terminal of a display target position specified by a user on a base map displayed on the user terminal; a first display processing unit that generates a plurality of identification information for identifying a plurality of unit orthoimages from the plurality of unit orthoimages and displays them on a user terminal; A unit orthoimage identified by selected identification information, which is identification information selected by the user, is provided to the user terminal.

Further, the image display method according to the present disclosure includes a first step of receiving from the user terminal an input of a display target position specified by a user on a base map displayed on the user terminal, and a second step of generating a plurality of pieces of identification information for identifying a plurality of unit orthoimages from a viewpoint and displaying them on a user terminal, A unit orthorectified image identified by the selected identification information, which is the identification information selected by , is provided to the user terminal.

Further, the image display program according to the present disclosure includes a computer, a first receiving unit that receives from the user terminal an input of a display target position specified by a user on a base map displayed on the user terminal, and each of the display target positions and functions as a first display processing unit that generates a plurality of identification information for identifying a plurality of unit orthoimages from different viewpoints and displays them on a user terminal, and among the plurality of unit orthoimages, a plurality of A unit orthoimage identified by the selected identification information selected by the user from the identification information is provided to the user terminal.

In these devices, methods, and programs, when an input of a display target position designated by a user is accepted, a plurality of pieces of identification information are generated and displayed on the user terminal. The plurality of pieces of identification information are information for identifying a plurality of unit orthoimages that include display target positions and are viewed from different viewpoints. Then, the unit orthoimage identified by the selected identification information, which is the identification information selected by the user from among the plurality of identification information, is provided to the user terminal. With this, by arbitrarily providing a plurality of unit orthoimages to the user terminal, it is possible to check the shape and state of the feature at the display target position from multiple viewpoints. A unit orthoimage is a digital terrain model that converts the elevation data into a grid for a single digital photograph, and is orthographically converted to a uniform scale in the photograph. It is an orthographic image. The orthographic conversion process here is a process for correcting this because the photographing camera is a central projection and the scale decreases as the distance from the center of the photograph increases.

In the image display device according to the present disclosure, the second reception unit receives input of the selection identification information from the user terminal, and the second reception unit causes the user terminal to display the unit orthoimage identified by the selection identification information among the plurality of unit orthoimages. and a display processing unit. Thereby, a plurality of unit orthorectified images can be arbitrarily displayed on the user terminal, and the shape and state of the feature at the display target position can be reliably confirmed from multiple viewpoints.

In the image display device according to the present disclosure, the first display processing unit causes the user terminal to display the position information of each of the plurality of unit orthoimages in association with the identification information corresponding to each of the plurality of unit orthoimages. good. Accordingly, by referring to the position information of each unit orthorectified image, the user can easily grasp the unit orthorectified image including the display target position imaged from the viewpoint to be confirmed.

In the image display device according to the present disclosure, each of the plurality of pieces of identification information includes a URL for identifying each of the plurality of unit orthoimages, and an icon indicating the URL, and the first display processing unit displays Generating position information including the relative position of the reference point of each of the plurality of unit orthoimages with respect to the target position, and presenting a URL for identifying the unit orthoimage corresponding to the relative position for each of the plurality of unit orthoimages. The icon may be arranged at a position corresponding to the relative position and displayed on the user terminal, and the second reception unit may receive an input of a URL as the selection identification information from the user terminal in response to an operation on the icon by the user. As a result, each icon is arranged according to the relative position of each unit orthoimage with respect to the display target position, so that the user can intuitively grasp the unit orthoimage including the display target position captured from the viewpoint to be confirmed. can.

In the image display device according to the present disclosure, the second reception unit detects a plurality of different types of operations on the icon by the user, and the second display processing unit detects the operation type detected by the second reception unit. Alternatively, the unit orthoimage may be displayed on the user terminal by a plurality of different display methods. As a result, the unit orthoimage can be presented to the user in accordance with the manner in which the user wants to check the unit orthoimage, so that the user's convenience can be enhanced.

In the image display device according to the present disclosure, when the second reception unit detects a selection operation on an icon, the second display processing unit performs the selection operation on the target of the selection operation until the selection operation on the icon is canceled. A unit orthoimage identified by a URL corresponding to a certain icon may be displayed on the user terminal. As a result, the unit orthoimage that the user wants to check can be displayed according to the user's timing.

In the image display device according to the present disclosure, when the second reception unit detects a selection operation on a plurality of icons, the second display processing unit identifies by URLs corresponding to the plurality of icons that are targets of the selection operation. A plurality of unit orthorectified images may be arranged and displayed on the user terminal. As a result, it is possible to check a plurality of viewpoints at once, so that it is possible for the user to efficiently and easily grasp the shape and state of the display target position that the user wants to check.

In the image display device according to the present disclosure, the first display processing unit may display the icon superimposed on the base map displayed on the user terminal. As a result, the user can select the unit orthoimage to be confirmed while grasping the positional relationship between the display target position on the base map and the icon corresponding to the relative position.

In the image display device according to the present disclosure, the first reception unit further receives an input of the display target period specified by the user from the user terminal, and the first display processing unit creates images from photographs taken during the display target period. A plurality of pieces of identification information for identifying a plurality of unit orthorectified images may be generated and displayed on the user terminal. As a result, the user can be presented with the feature at the display target position at the time the user wants to check.

In the image display device according to the present disclosure, the second display processing section may cause the user terminal to display the unit orthoimage so that the display target position is enlarged. This makes it easier for the user to grasp the shape and state of the feature at the display target position that the user wants to check.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide an image display device, an image display method, and an image display program that enable a user to confirm the shape and state of a feature desired to be grasped from multiple viewpoints.

3 is a block diagram showing the functional configuration of a map server according to this embodiment; FIG. It is an image figure which shows the target area imaged from the sky. FIG. 4 is a diagram showing an example of a plurality of unit orthoimages including the same display target position; 2 is a diagram showing the hardware configuration of a computer system related to the map server of FIG. 1; FIG. 4 is a sequence diagram of a method including an image display method according to the embodiment; FIG. 2 is a diagram showing an example of a base map displayed on the user terminal shown in FIG. 1; FIG. 2 is a diagram showing an example of related information stored in the database shown in FIG. 1; FIG. FIG. 4 is a diagram for explaining the relative position of the center point of each unit orthorectified image with respect to the position to be displayed; FIG. 4 is a diagram for explaining identification information and position information; 2 is a diagram for explaining an example of an image displayed on the user terminal shown in FIG. 1; FIG. 2 is a diagram for explaining an example of an image displayed on the user terminal shown in FIG. 1; FIG. 3 is a functional block diagram of an image display program according to the embodiment; FIG. FIG. 11 is a block diagram showing a modification of the map server; FIG. 11 is a block diagram showing a modification of the map server; FIG. 11 is a sequence diagram of a method including an image display method according to a modification; FIG. 11 is a block diagram showing a modification of the map server; FIG. 11 is a sequence diagram of a method including an image display method according to a modification; It is a figure which shows the modification of an icon. It is a figure which shows the modification of an icon. It is a figure which shows the modification of an icon. It is a figure which shows the modification of an icon.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and overlapping parts are omitted.

FIG. 1 is a block diagram showing the functional configuration of a map server (image display device) 10. As shown in FIG. The map server 10 shown in FIG. 1 is a device that provides an image display service for displaying an image of a feature that the user U wants to check from multiple viewpoints. Specifically, when the user U selects the position of a feature to be confirmed in the target area of the image display service via the user terminal 20 as the display target position, the map server 10 selects the display target position from different viewpoints. display a plurality of unit orthorectified images containing the image on the user terminal 20 .

The user terminal 20 is a terminal used by the user U. Examples of the user terminal 20 include smart phones, tablet terminals, notebook PCs (Personal Computers), and desktop PCs. The user U uses the user terminal 20 to input display target positions and the like in an application for using the map server 10, for example. The user terminal 20 transmits the display target position and the like input by the user U to the map server 10 . The user terminal 20 has a display section 21 . The display unit 21 displays a plurality of unit orthorectified images including display target positions from different viewpoints according to instructions from the map server 10 . The display unit 21 is, for example, a display device included in the user terminal 20 . Note that the display unit 21 may function as an interface unit that configures a GUI (Graphical User Interface) and receives various data input from the user U, for example.

For unit orthoimages, the digital terrain model converted from the elevation data into a grid is used for each digital photo that is a digitalized aerial photo, and the scale is unified in the photo by orthographic projection processing. It is an orthographic projection image. An aerial photograph is an image of a target area captured from above by an imaging device (not shown). An imaging device is a device that incorporates a camera having an imaging function, and is provided in an aircraft (not shown) such as a helicopter, for example. The aircraft flies over the area to be imaged. In this embodiment, examples of target areas include urban areas and mountainous areas.

Since the camera built into the photographing device is a central projection, the scale of the object captured in the aerial photograph becomes smaller as the distance from the center of the aerial photograph increases. Therefore, by subjecting a numerical photograph obtained by digitizing an aerial photograph to orthogonal conversion processing, it is possible to obtain a unit orthoimage in which the reduced scale of the object captured in the aerial photograph is corrected. In other words, the unit orthoimage is an image obtained by orthogonally transforming a numerical photograph of an aerial photograph, and is an image that has not undergone mosaic processing.

Here, the unit orthorectified image will be described in detail with reference to FIGS. 2 and 3. FIG. FIG. 2 is an image diagram showing a target area y imaged from above. FIG. 3 is a diagram showing an example of a plurality of unit orthoimages including the same display target position. In the example shown in FIG. 2, a route L along which an aircraft travels is shown. The aircraft acquires aerial photographs along the route L at each point H1-H6. The imaging ranges of a plurality of aerial photographs acquired in this manner may partially overlap each other, and the overlapped portions may be imaged from different viewpoints. For example, a range K is included in each aerial photograph (and thus each unit orthoimage) acquired at each of the points H1 to H6. The range K included in each aerial photograph is imaged from different viewpoints at each of the points H1 to H6.

3, the range J10 included in the unit orthorectified image J1 shown in FIG. , the same region corresponding to the range K is included. Here, when comparing the image J100 in which a part of the range J10 is enlarged and the image J200 in which a part of the range J20 is enlarged, the images J100 and J200 include the same feature, but they are different from each other. Different perspectives represent different aspects of the feature. By utilizing such unit orthophotographs, the map server 10 can display images of features that the user U wants to confirm from multiple viewpoints (multiple side views).

The configuration of the map server 10 will be described in detail below. FIG. 4 is a diagram showing the hardware configuration of a computer system related to the map server 10 of FIG. As shown in FIG. 4, the map server 10 physically includes a CPU (Central Processing Unit) 101, a RAM (Random Access Memory) 102 as a main storage device, a ROM (Read Only Memory) 103, and a data transmission/reception device. a communication module 104, an output device 105 such as a touch panel display or a liquid crystal display, and an input device 106 such as an input key or a touch sensor. Each function of the map server 10 shown in FIG. 1 is performed under the control of the CPU 101 by loading the image display program according to the present embodiment onto hardware such as the CPU 101 and RAM 102 shown in FIG. It is realized by operating the communication module 104, the output device 105, and the input device 106, and reading and writing data in the RAM 102 and the like.

Returning to FIG. 1, the map server 10 includes, as functional components, a first reception unit 11, a first display processing unit 12, a generation unit 13, a storage unit 14, a second reception unit 15, and a 2 display processing unit 16; Each component will be briefly described here, and will be described in detail in the processing of each component described later.

The first reception unit 11 is a functional unit that receives from the user terminal 20 an input of a display target position specified by the user U on the base map displayed on the user terminal 20 . The base map is a map showing ground buildings, roads, mountainous areas, etc. within a range where the map server 10 can display unit orthoimages from a plurality of viewpoints. The display target position is, for example, coordinate information indicating the absolute position of the position designated by the user U on the base map.

In the present embodiment, the first reception unit 11 further receives an input of the display target period designated by the user U from the user terminal 20 . The first reception unit 11 further receives from the user terminal 20 image size information indicating the size of the unit orthorectified image to be displayed on the user terminal 20 by processing described later. The image size information is predetermined, for example. The first reception unit 11 outputs the image size information, the display target position specified by the user U, and the display target period to the first display processing unit 12 .

The first display processing unit 12 is a functional unit that generates a plurality of pieces of identification information and position information and displays them on the display unit 21 of the user terminal 20 . The plurality of pieces of identification information are information for identifying a plurality of unit orthoimages each including a display target position and viewed from different viewpoints. As an example, each piece of identification information includes a URL (Uniform Resource Locator) for identifying each unit orthoimage and an icon indicating the URL. When the first display processing unit 12 receives the display target position and the display target period from the first reception unit 11, the first display processing unit 12 generates from the database 30 the aerial photograph taken during the display target period and includes the display target position. Information of a unit orthoimage (hereinafter sometimes referred to as "object information") is acquired. Then, the first display processing unit 12 generates a plurality of pieces of identification information and position information based on the acquired target information. The database 30 is a database in which information related to unit orthorectified images is stored. Details of the database 30 will be described later.

As an example, the position information is information on the relative position between the position to be displayed and the reference point of the unit orthoimage. The first display processing unit 12 causes the display unit 21 to display the position information of each unit orthoimage in association with identification information (for example, URL and icon) corresponding to each unit orthoimage. The details of the contents displayed on the display unit 21 by the first display processing unit 12 will be described later. The first display processing unit 12 also outputs the image size information, the display target position, each generated URL, and the target information acquired from the database 30 to the generation unit 13 .

The generating unit 13 is a functional unit that generates display images. The display image is, for example, a unit orthoimage, and is an image obtained by enlarging the display target position of the unit orthoimage including the display target position. The display image is generated in the size indicated by the image size information. The generation unit 13 outputs each generated display image to the storage unit 14 in association with a URL.

The storage unit 14 is a functional unit that stores display images. The storage unit 14 stores the display image received from the generation unit 13 in association with the URL.

The second reception unit 15 is a functional unit that receives input of selected identification information from the user terminal 20 . The selected identification information is identification information selected by the user U from among a plurality of pieces of identification information, and in this embodiment, a URL indicating the location of the display image (that is, a URL for identifying the display image). is. Hereinafter, the URL may be referred to as a selection URL. In addition, in the present embodiment, the second reception unit 15 detects different types of operations by the user U on icons. The second reception unit 15 outputs each selection URL and the type of operation detected to the second display processing unit 16 .

The second display processing unit 16 is a functional unit that causes the display unit 21 to display a display image (unit orthorectified image) identified by a selection URL among the plurality of unit orthoimages. The second display processing unit 16 refers to the selection URL received from the second reception unit 15 and acquires the display image corresponding to the selection URL from the storage unit 14 . Then, the second display processing unit 16 causes the display unit 21 to display the acquired display image according to the type of operation detected by the second reception unit 15 .

Next, the operation (processing) of the functional components of the map server 10 and the image display method according to this embodiment will be described in detail. FIG. 5 is a sequence diagram of a method including an image display method according to this embodiment.

First, the first accepting unit 11 accepts input from the user terminal 20 of the display target position, the display target period, and the image size information specified by the user U on the base map displayed on the display unit 21 (step S11: 1 step). The user U operates the user terminal 20 using, for example, a web application for using the map server 10, an application installed in the user terminal 20, etc., to display a predetermined position on the base map. Obtained by selection. The user U designates a display target position as the position of a feature that the user U wants to check from multiple viewpoints. FIG. 6 is a diagram showing an example of the base map displayed on the display unit 21. As shown in FIG. In the example shown in FIG. 6, the display target position T displayed on the base map M is designated by the user U operating the user terminal 20 . Figures 6, 10, 11, 13-16 Source: MapData(C) OpenStreetMap contributors (License:www.openstreetmap.org/copyright) (Base map and data from OpenStreetMap and OpenStreetMap Foundation) The image may have been superimposed by the applicant.)

The display target period is also obtained by inputting an arbitrary period by the user U using an application or the like, similarly to the display target position. Examples of the display target period include a yearly period such as "2022" and a monthly period such as "March 2022". The user U designates a display target period as a time when he/she wants to check the feature at the display target position. The first receiving unit 11 outputs the image size information, the display target position, and the display target period received from the user terminal 20 to the first display processing unit 12 .

Subsequently, when the first display processing unit 12 receives the image size information, the display target position, and the display target period from the first reception unit 11 , the target information that satisfies the conditions of the display target position and the display target period is stored in the database 30 . An acquisition request for (information of a unit orthoimage generated from aerial photographs taken within the display target period and including the display target position) is transmitted (step S12).

The database 30 is a database that stores related information of a large number of unit orthorectified images in which the target area of the image display service provided by the map server 10 is photographed. FIG. 7 is a diagram showing an example of related information stored in database 30 shown in FIG. As shown in FIG. 7, the related information includes an image ID (identifier), shooting date, name, range, and URL.

The image ID is information that can uniquely identify a unit orthoimage. The photographing date indicates the date when the aerial photograph, which is the source of the unit orthoimage, was photographed. The name indicates the name of the unit orthoimage. The range indicates the position information of the unit orthoimage. are the minimum XY coordinates and the maximum XY coordinates of . Using the example shown in FIG. 3, the database 30 stores the minimum XY coordinates (x1, y1) and the maximum XY coordinates (X1, Y1) of the unit orthoimage J1 as other information related to the unit orthoimage J1. are stored in association with . Similarly for the unit orthoimage J2, the database 30 stores the minimum XY coordinates (x2, y2) and the maximum XY coordinates (X2, Y2) of the unit orthoimage J2 in association with other information related to the unit orthoimage J2. stored in

The URL is information indicating the location (link destination) of the unit orthoimage on the network. As an example, each unit orthoimage is stored in an external database or the like (not shown), and can be obtained by accessing from the URL.

Upon receiving the target information acquisition request from the first display processing unit 12, the database 30 transmits the requested target information to the first display processing unit 12 (step S13). Specifically, the database 30 refers to the photographing year and month and range included in each related information, and the range generated from the aerial photograph taken in the photographing year and month during the display target period and including the display target position is specified, and information about each specified unit orthoimage is transmitted to the first display processing unit 12 as target information. The target information is information including at least the range and URL among the related information of each identified unit orthoimage.

Subsequently, when the first display processing unit 12 receives the target information from the database 30, it generates identification information and position information for each unit orthoimage (step S14: second step).

Here, an outline of identification information and position information will be described. The image display service provided by the map server 10 displays on the display unit 21 a plurality of unit orthorectified images from different viewpoints including the display target position (feature) that the user U wants to check. It is possible to check the desired feature from multiple viewpoints. At this time, the user U does not necessarily want to check all the unit orthoimages including the display target position. It becomes difficult to find a unit orthoimage that includes an object, and there is a risk that operability will deteriorate. Therefore, the first display processing unit 12 generates identification information for each unit orthoimage, and displays the generated identification information on the display unit 21 so that the user U can select only the unit orthoimage to be confirmed. It is

At this time, if the identification information of each unit orthoimage is displayed on the display unit 21 so that the user U can easily grasp what kind of display target position mode is included in each unit orthoimage, operability can be improved. Further improve. Therefore, the first display processing unit 12 generates position information including the relative position of the reference point of each unit orthoimage with respect to the display target position, and along with this process, for each unit orthoimage, the unit orthoimage corresponding to the relative position is generated. is arranged at a position corresponding to the relative position and displayed on the display unit 21 . That is, the first display processing unit 12 displays the identification information together with the position information on the display unit 21, so that the user U can easily grasp from what viewpoint the display target position is shown in the unit orthoimage. . In this embodiment, the first display processing unit 12 uses the center point of each unit orthorectified image as the reference point of each unit orthorectified image with respect to the display target position.

An example of processing for generating identification information and position information by the first display processing unit 12 will be described below with reference to FIGS. FIG. 8 is a diagram for explaining the relative position of the center point of each unit orthorectified image with respect to the display target position. FIG. 9 is a diagram for explaining identification information and position information. The unit orthoimages A1, A2, A3, B1, and B2 shown in FIG. 8 are unit orthoimages whose related information is stored in the database 30. In FIG. In the example shown in FIGS. 8 and 9, the first receiving unit 11 receives from the user terminal 20 the predetermined display target period and the display target position T shown in FIG. Therefore, the first display processing unit 12 acquires the target information of the three unit orthorectified images A1, A2, A3 including the display target position T in the display target period from the database 30. FIG. Note that the unit orthorectified images B1 and B2 shown in FIG. 8 do not include the display target position T, so they are not subject to this processing by the first display processing section 12 .

Here, the unit orthoimage A1 will be described as an example. The display target position T is positioned diagonally to the lower right (that is, the positive X direction and the negative Y direction) in the unit orthorectified image A1. In other words, the center point AP1 of the unit orthorectified image A1 is positioned diagonally to the upper left of the display target position T (that is, the negative X direction and the positive Y direction). Based on the range included in the target information received from the database 30 and the display target position received from the first reception unit 11, the first display processing unit 12 displays the display target position T in the unit orthorectified image A1 and the unit orthorectified image A1. and the direction of the center point AP1 with respect to the display target position T are calculated, and the position information of the unit orthorectified image A1 indicating the distance and direction is generated. Since the distance and direction can be calculated using a known technique, detailed description is omitted.

For the unit orthoimage A2 as well, the first display processing unit 12 determines the distance between the display target position T and the center point AP2 of the unit orthoimage A2, and the distance between the display target position T and the center point AP2 of the unit orthoimage A2. Calculate directions. The first display processing unit 12 also calculates the distance between the display target position T and the center point AP3 of the unit orthorectified image A3 and the direction of the center point AP3 with respect to the display target position T for the unit orthorectified image A3. Thereby, the first display processing unit 12 generates the position information of each of the unit orthorectified images A2 and A3. That is, in this example, the relative position of the reference point of the unit orthoimage with respect to the display target position T is the distance between the display target position T in the unit orthoimage and the center point of the unit orthoimage, and the distance between the display target position T and the center point with respect to the display target position T. is the direction.

The first display processing unit 12 generates identification information together with the position information generation processing described above. In this embodiment, as an example, the identification information indicates a URL indicating the location (link destination) of a display image to be described later, that is, a display URL that is a URL for identifying the display image, and a display URL. Contains icons and . At this time, the first display processing unit 12 generates identification information by associating the position information of each unit orthoimage with the display URL and icon (identification information) corresponding to each unit orthoimage.

Here, the process of generating identification information by the first display processing unit 12 will be described using the example shown in FIG. 9 . In the example shown in FIG. 9, position information and identification information I1, I2, and I3 are generated for each unit orthoimage A1, A2, and A3.

Taking the unit orthoimage A1 as an example, the first display processing unit 12 generates a display URL for the unit orthoimage A1, and generates and arranges an icon C1 indicating the display URL based on position information. . Specifically, the first display processing unit 12 arranges the icon C1 indicating the display URL of the unit orthorectified image A1 at a position corresponding to the relative position (distance and direction) of the center point AP1 with respect to the display target position T. .

Here, an example of arrangement of icons indicating display URLs will be described. When the distance between the display target position T and the center point AP1 of the unit orthorectified image A1 is equal to or less than a predetermined value, the first display processing unit 12 performs , the icon C1 is arranged at a position along the direction of the center point AP1 with respect to the position T to be displayed. On the other hand, when the distance between the display target position T and the center point AP1 is greater than the predetermined value, the first display processing unit 12 sets the center point relative to the display target position T in the ring-shaped region R2 surrounding the region R1. An icon C1 is arranged at a position along the direction of AP1. In the example shown in FIG. 9, the distance between the display target position T and the unit orthorectified image A1 is greater than a predetermined value, so the first display processing unit 12 places the icon C1 at the center point in the region R2. An icon C1 is arranged along the direction corresponding to AP1. Note that the number of regions may be three or more.

In the example shown in FIG. 9, the icon C1 is generated so as to color the area having an angle α in both the forward direction and the reverse direction with respect to the virtual line connecting the display target position T and the center point AP1. The angle α is a preset value. As an example, if the icons are arranged close to each other and overlap each other, the overlapping portions may be colored darker than the non-overlapping portions.

As with the unit orthoimage A1, the first display processing unit 12 processes the identification information I2 (display URL and icon C2) of the unit orthoimage A2 and the identification information I3 (display URL and icon C3) of the unit orthoimage A3. also generate As described above, the first display processing unit 12 generates identification information and position information. Note that, as in the example shown in FIG. 9, the first display processing unit 12 may further generate lines that define the regions R1 and R2. The first display processing unit 12 outputs the image size information, the display target position, the generated display URLs, and the target information acquired from the database 30 to the generation unit 13 .

Subsequently, the first display processing unit 12 causes the display unit 21 to display the identification information and position information of each unit orthoimage (step S15: second step). In this embodiment, the first display processing unit 12 causes the icon of each unit orthoimage to be superimposed on the base map displayed on the display unit 21 . Note that the first display processing unit 12 may display the icon of each unit orthoimage by a method different from the method of superimposing it on the base map.

FIG. 10 is a diagram for explaining an example of an image displayed on the display unit 21. As shown in FIG. In the example shown in FIG. 10, the icon C of the identification information I of each unit orthoimage is superimposed on the base map M and displayed on the display section 21 . Further, in the example shown in FIG. 10, the display unit 21 displays a region R1, a region R2, and a region R3 surrounding the region R2.

As described above, in steps S14 and S15, a plurality of pieces of identification information for identifying a plurality of unit orthoimages each including the display target position T and from different viewpoints are generated and displayed on the user terminal 20. FIG.

Subsequently, the generation unit 13 generates a display image (step S16). When receiving the image size information, the display target position, each display URL, and the target information from the first display processing unit 12, the generation unit 13 uses the URL included in the target information for each received display URL, A unit orthoimage corresponding to the display URL is obtained from the above-described external database or the like. Then, the generation unit 13 generates a display image in which the display target position in the unit orthoimage is enlarged for each acquired unit orthoimage. The generation unit 13 outputs each generated display image to the storage unit 14 in association with the corresponding display URL. Note that the generation unit 13 may generate the display image (at the same size) without enlarging the display target position.

Subsequently, the storage unit 14 stores the display image received from the generation unit 13 in association with the corresponding display URL (step S17). Each display image is stored in the storage unit 14 so as to be accessible by the display URL associated by the generation unit 13 .

Subsequently, the second reception unit 15 receives the input of the selected identification information from the user terminal 20, and detects the type of operation on the icon by the user U (step S18: third step). In the present embodiment, the second reception unit 15 receives an input of a selection URL as selection identification information from the user terminal 20 from a plurality of display URLs in response to the user U's operation on the icon.

Multiple types of operations include individual selection operations and multiple selection operations. When the user U performs an individual selection operation (selection operation) on an icon, the user terminal 20 transmits the URL corresponding to the icon to the second reception unit 15, and the second reception unit 15 transmits the received URL is the selected URL.

Further, when the user U performs a selection operation on a plurality of icons, the user terminal 20 transmits a plurality of URLs corresponding to the plurality of icons to the second reception unit 15, and the second reception unit 15 receives An input is received from the user terminal 20 in which a plurality of selected URLs are selected as a plurality of selected URLs (a plurality of selected identification information). The second reception unit 15 outputs each selection URL and the type of operation detected to the second display processing unit 16 . Note that the operation of selecting an icon is an operation including clicking and tapping an icon.

As described above, in step S18, an input of selected identification information, which is identification information selected by the user U from among a plurality of pieces of identification information, is received from the user terminal 20. FIG.

Subsequently, the second display processing unit 16 causes the display image identified by the selected URL to be displayed on the display unit 21 (step S19: fourth step). When the type of operation received from the second reception unit 15 is an individual selection operation (that is, when the second reception unit 15 detects an individual selection operation for an icon), the second display processing unit 16 The display image identified by the selection URL, which is the target of the selection operation, is displayed on the display unit 21 until the selection operation for is released. Specifically, the second display processing unit 16 acquires the display image corresponding to the received selection URL from the storage unit 14 and causes the display unit 21 to display the acquired display image. Examples of individual selection operations include a hover operation on an icon, a click operation including a double click, a cross key of the interface unit of the user terminal 20, a key operation on an arbitrary key, and the like. In addition, as an example of "until the selection operation for the icon is canceled", after the selection operation for the icon is detected, the selection operation for an icon different from the icon (hover operation, click operation, and key operation, etc.) is detected, and from detection of a selection operation on the icon until detection of a selection operation on a key for canceling the display of the icon or a cancellation icon.

When the type of operation received is a plurality of selection operations (that is, when the second reception unit 15 detects a selection operation for a plurality of icons), the second display processing unit 16 identifies by a plurality of selection URLs. A plurality of display images are displayed side by side on the display unit 21 . Specifically, the second display processing unit 16 acquires a plurality of display images corresponding to the received plurality of selection URLs from the storage unit 14 and causes the display unit 21 to display the acquired plurality of display images side by side. .

In the example shown in FIG. 10, the user U operates the user terminal 20 to place the pointer PT displayed on the display unit 21 on the icon CS among the plurality of icons C, and selects the icon CS. ing. By this operation, the second reception unit 15 receives the selection URL corresponding to the icon CS from the user terminal 20 and detects individual selection operations. Subsequently, the second display processing unit 16 acquires the display image X corresponding to the selected URL received from the second reception unit 15 from the storage unit 14 and causes the display unit 21 to display the acquired display image X. As an example, the second display processing unit 16 causes the display unit 21 to display the display image X superimposed on the base map M. FIG.

FIG. 11 is a diagram for explaining an example of an image displayed on the display unit 21. As shown in FIG. In the example shown in FIG. 11, the user U operates the user terminal 20 and uses the pointer PT displayed on the display unit 21 to click the icons CS1, CS2, and CS3 among the plurality of icons C. , icons CS1, CS2 and CS3 are selected. By this operation, the second reception unit 15 receives the selection URLs "1", "2", and "3" corresponding to the icons CS1, CS2, and CS3 from the user terminal 20, and detects multiple selection operations. Subsequently, the second display processing unit 16 retrieves the display images X1, X2, and X3 corresponding to the plurality of selection URLs “1”, “2”, and “3” received from the second reception unit 15 from the storage unit 14. The acquired display images X1, X2, and X3 are displayed side by side on the display unit 21. FIG. The second display processing unit 16 may generate or acquire a list image of the display images X1, X2, and X3, and cause the display unit 21 to display the list image.

The processes of steps S18 and S19 are executed each time the second reception unit 15 receives a selection URL and detects the type of operation. For example, every time the second reception unit 15 detects an individual selection operation, the second display processing unit 16 causes the display unit 21 to display a display image identified by the selection URL received by the second reception unit 15. .

With the above, a series of processes of the image display method are completed. Note that steps S16 and S17 may be performed before step S15, or may be performed in parallel with step S15. Further, the display image generation processing in step S16 may be performed after step S18, targeting only the unit orthorectified image corresponding to the selected URL. In other words, a display image may be generated for each selected URL received from the user terminal 20 .

Next, an image display program for causing a computer to function as the map server 10 will be described with reference to FIG. FIG. 12 is a functional block diagram of an image display program according to this embodiment.

The image display program PR1 includes a main module PR11, a first reception module PR12, a first display processing module PR13, a generation module PR14, a storage module PR15, a second reception module PR16, and a second display processing module PR17. , contains

The main module PR11 is a part that controls the operation of the map server 10 in an integrated manner. Functions realized by executing the first reception module PR12, the first display processing module PR13, the generation module PR14, the storage module PR15, the second reception module PR16, and the second display processing module PR17 are The functions are the same as those of the unit 11 , the first display processing unit 12 , the generation unit 13 , the storage unit 14 , the second reception unit 15 , and the second display processing unit 16 .

The image display program PR1 is provided by, for example, a computer-readable storage medium such as a CD-ROM, DVD, or ROM, or a semiconductor memory. Also, the image display program PR1 may be provided via a network as a computer data signal superimposed on a carrier wave.

As described above, in the map server 10, the image display method, and the image display program PR1 according to the present embodiment, when the input of the display target position specified by the user U is accepted, a plurality of identification information (a plurality of A display URL and a plurality of icons indicating each display URL) are generated and displayed on the user terminal 20 . Then, an input of a selection URL (selection identification information), which is identification information selected by the user U from among a plurality of pieces of identification information, is received from the user terminal 20, and a unit identified by the selection URL is received from the plurality of unit orthoimages. An orthoimage (display image) is displayed on the user terminal 20 . This makes it possible to arbitrarily display a plurality of unit orthorectified images on the user terminal 20 and check the shape and state of the feature at the display target position from multiple viewpoints.

The map server 10, the image display method, and the image display program PR1 according to the present embodiment are particularly effective for confirming the shape and state of features such as fixed asset operations. As a general rule, fixed asset operations require annual on-site confirmation, but confirmation by aerial photographs may be substituted. At this time, conventionally, for example, it is conceivable to use a simple orthoimage or a digital orthoimage.

Simple orthoimages are created by using multiple unit orthoimages, and using a range close to the center of the photo where there is as little collapse of features as possible. It is an image generated by automatically executing based on A digital orthoimage is an image generated by performing the above-described mosaic processing on a simple orthoimage by manually adjusting it so as not to cause collapse of features, misalignment, and the like. For example, in simple orthoimages, fine image distortions that cannot be adjusted by automatic processing such as alignment of viaducts and steep slopes at the joints between unit orthoimages can be manually adjusted and joined to create a digital image. An orthoimage is generated.

In the digital orthoimage (or simple orthoimage (same below)) generated as described above, by confirming the collapse of the feature (by viewing the feature from the side), it is possible to see that the outer wall is on the roof as described above. It is difficult to confirm whether or not there is. Also, with digital orthoimages, the same problem arises in confirming the height difference between land and roads. In such a case, it is necessary to check the site, which is troublesome for the user.

In this regard, in this embodiment, since the shape and state of the feature can be confirmed from multiple viewpoints on the image, the outer wall of the house, the height difference between the land and the road, etc. can be confirmed on the image. As a result, for example, it is possible to eliminate the need for on-site confirmation in the fixed assets business, reduce the user's labor, and shorten the work period for on-site investigation.

In addition, in this embodiment, by utilizing the unit orthoimages that have been conventionally used to create simple orthoimages, it is possible to reproduce the shape and shape of features at display target positions without newly performing processing such as mosaic processing. The status can be checked from multiple viewpoints. Further, in this embodiment, instead of aerial photographs, unit orthoimages whose scales are unified by orthogonally transforming aerial photographs are used. It is possible to obtain it with certainty.

In this embodiment, the first display processing unit 12 causes the user terminal 20 to display the position information of each unit orthoimage in association with the identification information corresponding to each unit orthoimage. Specifically, the first display processing unit 12 generates position information including the relative position of the center point (reference point) of each unit orthorectified image with respect to the display target position, and corresponds to the relative position of each unit orthorectified image. An icon indicating a URL for identifying the unit orthoimage to be displayed is arranged at a position corresponding to the relative position and displayed on the user terminal 20, and the second reception unit 15 selects the selected URL in response to the user U's operation on the icon. is received from the user terminal 20 . As a result, by referring to the position information of each unit orthoimage, the user U can easily grasp the unit orthoimage including the display target position imaged from the viewpoint to be confirmed. In particular, in the present embodiment, each icon is arranged according to the relative position of each unit orthoimage with respect to the display target position. can be grasped.

In the present embodiment, the second reception unit 15 detects a plurality of different types of operations on the icon by the user U, and the second display processing unit 16 detects the operation type detected by the second reception unit 15. , the unit orthorectified image is displayed on the user terminal 20 by a plurality of display methods different from each other. As a result, the unit orthorectified image can be presented to the user U in accordance with the manner in which the user U wants to check the unit orthorectified image, so that the convenience for the user U can be enhanced.

Specifically, when the second reception unit 15 detects a selection operation on an icon, the second display processing unit 16 displays the icon that is the target of the selection operation until the selection operation on the icon is canceled. The unit orthoimage identified by the selection URL corresponding to is displayed on the user terminal 20 . As a result, the unit orthoimage that the user U wants to check can be displayed according to the user's timing.

Further, when the second reception unit 15 detects a selection operation for a plurality of icons, the second display processing unit 16 displays a plurality of unit orthorectified images identified by the selection URLs corresponding to the plurality of icons that are the targets of the selection operation. The images are displayed side by side on the user terminal 20 . As a result, it is possible to check a plurality of viewpoints at once, so that it is possible for the user U to efficiently and easily grasp the shape and state of the display target position that the user U wants to check.

In this embodiment, the first display processing unit 12 superimposes the icon on the base map and displays it. As a result, the user U can select a unit orthorectified image to be confirmed while grasping the positional relationship between the display target position on the base map and the icon corresponding to the relative position.

In the present embodiment, the first reception unit 11 further receives an input of the display target period specified by the user U from the user terminal 20, and the first display processing unit 12 creates a display from photographs taken during the display target period. A plurality of pieces of identification information for identifying the plurality of unit orthoimages are generated for the plurality of unit orthoimages, and displayed on the user terminal 20 . Thereby, the user U can be presented with the feature at the display target position at the time the user U wants to check.

In this embodiment, the second display processing unit 16 causes the user terminal 20 to display the unit orthoimage so that the display target position is enlarged. This makes it easier for the user U to grasp the shape and state of the feature at the display target position that the user wants to check.

The above embodiment describes one mode of the present disclosure. Therefore, the present disclosure is not limited to the forms described above and can be arbitrarily modified.

For example, the map server 10 may be composed of one device that is physically or logically connected, or may be composed of multiple devices that are physically or logically separated from each other. For example, the map server 10 may be realized by multiple computers distributed over a network like cloud computing. As described above, the configuration of the map server 10 may include any configuration capable of realizing the functions of the map server 10. FIG.

The display image may be generated and managed by an external server or the like. In that case, the map server 10 does not have to include the generation unit 13 and the storage unit 14 .

The map server 10 includes at least a first reception unit 11 and a second display processing unit 16, and is configured to provide the user terminal 20 with a unit orthoimage identified by selection identification information from among a plurality of unit orthoimages. I wish I had. In the example shown in FIG. 13, the user terminal 20 has the second reception section 22 and the second display processing section 23 instead of the map server 10 having the second reception section 15 and the second display processing section 16 . Basic functions of the second reception unit 22 and the second display processing unit 23 are the same as those of the second reception unit 15 and the second display processing unit 16 . The second display processing unit 23 acquires the display image corresponding to the received selection URL from the storage unit 14 of the map server 10 and causes the display unit 21 to display the acquired display image. According to the above modification, by arbitrarily providing a plurality of unit orthoimages to the user terminal 20, it is possible to check the shape and state of the feature at the display target position from multiple viewpoints.

14 and 15, in addition to the second receiving unit 22 and the second display processing unit 23, the user terminal 20 includes the storage unit 24 instead of the map server 10 including the storage unit 14. ing. Basic functions of the storage unit 24 are similar to those of the storage unit 14 . Note that the storage unit 24 may function as a cache memory of the user terminal 20 .

In the example shown in FIG. 15, the processes of steps S11-S15 are the same as the processes of steps S11-15 shown in FIG. After step S15, the generation unit 13 generates display images (step S26), and outputs each generated display image to the storage unit 24 of the user terminal 20 in association with the corresponding display URL. . Subsequently, the storage unit 24 stores the display image received from the generation unit 13 in association with the corresponding display URL (step S27).

The processing of steps S28 and S29 performed by the user terminal 20 is basically the same as the processing of steps S18 and S19 performed by the map server 10 . Specifically, the second reception unit 22 of the user terminal 20 receives the input of the selection identification information and detects the type of operation on the icon by the user U (step S28: third step). Subsequently, the second display processing unit 23 causes the display image identified by the selected URL to be displayed on the display unit 21 (step S29: fourth step). According to the above modification, by optionally providing a plurality of unit orthoimages to the user terminal 20, it is possible to confirm the shape and state of the feature at the display target position from multiple viewpoints.

The order of processing of each component of the map server 10 is not limited to the above embodiment. In the example shown in FIGS. 16 and 17 , instead of the processing by the generation unit 13 following the processing by the first display processing unit 12, the processing by the generation unit 13 is performed independently of the processing by the first display processing unit 12. processing takes place. That is, as shown in FIGS. 16 and 17, after step S15, when the second receiving unit 15 receives the input of the selection identification information from the user terminal 20 and detects the type of operation on the icon by the user U (step S36 : third step), and outputs the selected identification information to the generation unit 13 via the second display processing unit 16 .

Subsequently, the generation unit 13 generates display images (step S37), and outputs each generated display image to the storage unit 14 in association with the corresponding display URL. At this time, the display image may be generated for each selected URL included in the selection identification information. Subsequently, the storage unit 14 stores the display image received from the generation unit 13 in association with the corresponding display URL (step S38). Subsequently, the second display processing unit 16 causes the display image identified by the selected URL to be displayed on the display unit 21 (step S39: fourth step). The above modified example can also provide the same effects as the above embodiment. In the example shown in FIG. 17, the processing of steps S11-S15 is the same as the processing of steps S11-15 shown in FIG.

The form of the icon included in the identification information is not limited to the example of the above embodiment. 18 to 21 are diagrams showing modified examples of icons. For example, in the above embodiment, the position where each icon is arranged in the circumferential direction around the display target position T is determined only by the direction of the center point AP1 with respect to the display target position T within the region R1 or within the region R2 (in other words, was determined without being fixed within the region R1 or within the region R2). However, the first display processing unit 12 may arrange the icons in any one of a plurality of regions preliminarily partitioned in the circumferential direction. In the example shown in FIG. 18, a plurality of regions R in which icons C can be displayed are defined along the circumferential direction. It is arranged in one of the plurality of regions R according to the distance between A1 and the center point AP1 and the center point AP1 with respect to the position T to be displayed.

Also, the form of the plurality of areas in which icons can be arranged is not particularly limited. For example, the plurality of regions R may be circular as in the example shown in FIG. 19, trapezoidal as in the example shown in FIG. 20, or polygonal such as hexagons as in the example shown in FIG. It may be in shape. Also, the plurality of regions R may be arranged so as to surround the display target position T, as in the examples shown in FIGS. Further, when a plurality of icons are arranged in one area (that is, when the central points of two or more unit orthorectified images are located in one area), the first display processing unit 12 arranges the icons in the area. may be displayed. In the example shown in FIG. 21, two icons are arranged in the area RN. That is, in the example shown in FIG. 21, two unit orthorectified images can be displayed by selecting the region RN.

The first display processing unit 12 may generate a plurality of pieces of identification information and display them on the user terminal 20. For example, the position information of each unit orthoimage is associated with the identification information corresponding to each unit orthoimage, and is displayed by the user. It does not have to be displayed on the terminal 20, and for example, the location information does not have to be generated. In that case, the first display processing unit 12 may arrange icons and display them on the user terminal 20, for example. Further, the aspect of the identification information is not limited to the example of the above embodiment. For example, instead of generating the icon, the first display processing unit 12 may You may generate a string that indicates The positional information is also not limited to the example of the above embodiment. For example, the first display processing unit 12 may generate the minimum XY coordinates and the maximum XY coordinates of the unit orthoimage as the positional information.

In addition to or instead of individual selection operations and multiple selection operations by the user U, the second reception unit 15 may detect other types of operations. In addition, the second reception unit 15 does not have to detect a plurality of different types of operations by the user U on the icon. In that case, for example, the second display processing unit 16 may cause the user terminal 20 to display the unit orthoimage by a predetermined display method.

The first reception unit 11 may not further receive the input of the display target period specified by the user U from the user terminal 20, and may display the latest unit orthorectified image, for example. Further, the first reception unit 11 may not further receive input of image size information from the user terminal 20, and may generate a display image in a preset size.

The second display processing unit 16 does not have to cause the user terminal 20 to display the unit orthoimage so that the display target position is enlarged. Further, each unit orthoimage may be stored in the database 30 instead of an external server or the like.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present disclosure.

This specification discloses the following appendices.
(Appendix 1)
a first reception unit that receives an input of a display target position specified by a user on a base map displayed on the user terminal from the user terminal;
a first display processing unit that generates a plurality of pieces of identification information for identifying a plurality of unit orthoimages each including the display target position and from different viewpoints, and causes the user terminal to display the plurality of pieces of identification information;
with
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image display device.
(Appendix 2) a second reception unit that receives input of the selected identification information from the user terminal;
a second display processing unit that causes the user terminal to display a unit orthoimage identified by the selection identification information among the plurality of unit orthoimages;
further comprising
The image display device according to appendix 1.
(Appendix 3)
The first display processing unit causes the user terminal to display the position information of each of the plurality of unit orthoimages in association with the identification information corresponding to each of the plurality of unit orthoimages.
The image display device according to appendix 1.
(Appendix 4)
each of the plurality of identification information includes a URL for identifying each of the plurality of unit orthoimages, and an icon indicating the URL;
The first display processing unit
generating the position information including the relative position of each reference point of the plurality of unit orthorectified images with respect to the display target position;
For each of the plurality of unit orthorectified images, the icon indicating the URL for identifying the unit orthorectified image corresponding to the relative position is arranged at a position corresponding to the relative position and displayed on the user terminal. ,
The second reception unit receives input of the URL as the selected identification information from the user terminal in response to an operation on the icon by the user.
The image display device according to appendix 3.
(Appendix 5)
The second reception unit detects a plurality of different types of operations on the icon by the user,
The second display processing unit causes the user terminal to display the unit orthoimage by a plurality of different display methods according to the type of the operation detected by the second reception unit.
The image display device according to appendix 4.
(Appendix 6)
When the second reception unit detects a selection operation on the icon, the second display processing unit may correspond to the icon that is the target of the selection operation until the selection operation on the icon is canceled. causing the user terminal to display the unit orthoimage identified by the URL;
The image display device according to appendix 5.
(Appendix 7)
When the second reception unit detects a selection operation on a plurality of the icons, the second display processing unit selects a plurality of the units identified by the URLs corresponding to the plurality of icons that are the targets of the selection operation. display the orthorectified images side by side on the user terminal;
7. The image display device according to appendix 5 or 6.
(Appendix 8)
The first display processing unit displays the icon superimposed on the base map displayed on the user terminal.
The image display device according to any one of Appendices 4 to 7.
(Appendix 9)
The first reception unit further receives an input of a display target period specified by the user from the user terminal,
The first display processing unit generates the plurality of identification information for identifying the plurality of unit orthoimages created from photographs taken during the display target period. to display on the user terminal,
The image display device according to any one of Appendices 1 to 8.
(Appendix 10)
The second display processing unit causes the user terminal to display the unit orthoimage so that the display target position is enlarged.
The image display device according to any one of Appendices 1 to 9.

This specification also discloses the following remarks.
(Appendix 11)
a first step of receiving, from the user terminal, an input of a display target position specified by a user on a base map displayed on the user terminal;
a second step of generating a plurality of pieces of identification information for identifying a plurality of unit orthoimages each including the display target position and from different viewpoints, and causing the user terminal to display the pieces of identification information;
including
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image display method.

This specification also discloses the following remarks.
(Appendix 12)
a first reception unit that receives an input of a display target position specified by a user on a base map displayed on a user terminal from the user terminal;
Functioning as a first display processing unit for generating a plurality of identification information for identifying a plurality of unit orthorectified images each including the display target position and from different viewpoints, and for displaying the plurality of identification information on the user terminal;
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image viewing program.

DESCRIPTION OF SYMBOLS 10... Map server (image display apparatus), 11... 1st reception part, 12... 1st display processing part, 15, 22... 2nd reception part, 16, 23... 2nd display processing part, 20... User terminal, A1 , A2, A3... unit orthoimage, AP1 to AP3... center point (reference point), C, C1, CS, CS1, CS2, CS3... icon, I, I1, I2, I3... identification information, M... base map, PR1: image display program, T: position to be displayed, U: user, X, X1, X2, X3: image for display (unit orthoimage).

Claims (12)

a first reception unit that receives an input of a display target position specified by a user on a base map displayed on the user terminal from the user terminal;
a first display processing unit that generates a plurality of pieces of identification information for identifying a plurality of unit orthoimages each including the display target position and from different viewpoints, and causes the user terminal to display the plurality of pieces of identification information;
with
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image display device. a second reception unit that receives input of the selected identification information from the user terminal;
a second display processing unit that causes the user terminal to display a unit orthoimage identified by the selection identification information among the plurality of unit orthoimages;
further comprising
The image display device according to claim 1. The first display processing unit causes the user terminal to display the position information of each of the plurality of unit orthoimages in association with the identification information corresponding to each of the plurality of unit orthoimages.
3. The image display device according to claim 2. each of the plurality of identification information includes a URL for identifying each of the plurality of unit orthoimages, and an icon indicating the URL;
The first display processing unit
generating the position information including the relative position of each reference point of the plurality of unit orthorectified images with respect to the display target position;
For each of the plurality of unit orthorectified images, the icon indicating the URL for identifying the unit orthorectified image corresponding to the relative position is arranged at a position corresponding to the relative position and displayed on the user terminal. ,
The second reception unit receives input of the URL as the selected identification information from the user terminal in response to an operation on the icon by the user.
The image display device according to claim 3. The second reception unit detects a plurality of different types of operations on the icon by the user,
The second display processing unit causes the user terminal to display the unit orthoimage by a plurality of different display methods according to the type of the operation detected by the second reception unit.
The image display device according to claim 4. When the second reception unit detects a selection operation on the icon, the second display processing unit may correspond to the icon that is the target of the selection operation until the selection operation on the icon is canceled. causing the user terminal to display the unit orthoimage identified by the URL;
The image display device according to claim 5. When the second reception unit detects a selection operation on a plurality of the icons, the second display processing unit selects a plurality of the units identified by the URLs corresponding to the plurality of icons that are the targets of the selection operation. display the orthorectified images side by side on the user terminal;
The image display device according to claim 5. The first display processing unit displays the icon superimposed on the base map displayed on the user terminal.
The image display device according to claim 4. The first reception unit further receives an input of a display target period specified by the user from the user terminal,
The first display processing unit generates the plurality of identification information for identifying the plurality of unit orthoimages created from photographs taken during the display target period. to display on the user terminal,
The image display device according to any one of claims 1 to 8. The second display processing unit causes the user terminal to display the unit orthoimage so that the display target position is enlarged.
The image display device according to any one of claims 2-8. a first step of receiving, from the user terminal, an input of a display target position specified by a user on a base map displayed on the user terminal;
a second step of generating a plurality of pieces of identification information for identifying a plurality of unit orthoimages each including the display target position and from different viewpoints, and causing the user terminal to display the pieces of identification information;
including
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image display method. a first reception unit that receives an input of a display target position specified by a user on a base map displayed on a user terminal from the user terminal;
Functioning as a first display processing unit for generating a plurality of identification information for identifying a plurality of unit orthorectified images each including the display target position and from different viewpoints, and for displaying the plurality of identification information on the user terminal;
providing, to the user terminal, a unit orthoimage identified by selected identification information, which is the identification information selected by the user from among the plurality of identification information, from among the plurality of unit orthoimages;
Image viewing program.

Images