CN220584832U - Digital sand table system - Google Patents

Abstract

The application discloses digital sand table system, including sand table stage body, one or more interactive device, GIS image processing equipment and MR interactive processing equipment, one or more interactive device connects MR interactive processing equipment respectively, and GIS image processing equipment connects MR interactive processing equipment and sand table stage body respectively. The sand table body is used for displaying the sand table model and interacting with a user; the GIS image processing equipment is used for deploying GIS geographic application and a database, and the database stores a sand table model; the MR interaction processing equipment is used for processing and rendering the sand table model to obtain a holographic model; the one or more interactive devices are used to present a holographic model of the sand table model and to interact with the user in man-machine. In the embodiment of the application, the interactive linkage can be realized by the two three-dimensional information data presented by the sand table body and the holographic three-dimensional information data presented by one or more interactive devices.

Description

Digital sandbox system

Technical field

This application relates to the field of virtual reality technology, and specifically to a digital sandbox system.

Background technique

A sand table is a tool for simulating the real environment. It is usually a model made of specific materials according to a certain proportion based on topographic maps, aerial photos or on-site terrain. With the development of virtual reality technology, the virtual environment can be simulated and presented through computers. The holographic sand table can use holographic display technology to integrate digital scenes, and then combine it with hardware devices to present a virtual three-dimensional sand table image. Holographic display generally uses holographic projection, 3D display and other technologies. The map data displayed in holographic display is usually pre-produced, so the map data cannot be interactively linked.

Utility model content

Embodiments of the present application provide a digital sandbox system, and the map data presented in the digital sandbox can be interactively linked.

The embodiment of the present application discloses a digital sand table system, which includes a sand table body, one or more interactive devices, a GIS image processing device, and an MR interactive processing device, wherein:

One or more interactive devices are respectively connected to the MR interactive processing device, and the GIS image processing device is respectively connected to the MR interactive processing device and the sand table;

The sandbox platform is used to display the sandbox model and interact with users;

GIS image processing equipment, used to deploy GIS geographical applications and databases, and the database stores sandbox models;

MR interactive processing equipment, used to process and render sand table models to obtain holographic models;

One or more interactive devices, used to present the holographic model of the sandbox model and conduct human-computer interaction with the user.

In the embodiment of the present application, the digital sand table system includes a sand table body, one or more interactive devices, a GIS image processing device and an MR interactive processing device. The one or more interactive devices are respectively connected to the MR interactive processing device, and the GIS image processing device is respectively connected to MR interactive processing equipment and sand table. The sand table body is used to display the sand table model and interact with users; the GIS image processing equipment is used to deploy GIS geographical applications and databases, and the database stores the sand table model; the MR interactive processing equipment is used to process and render the sand table model to obtain a holographic model; One or more interactive devices are used to present the holographic model of the sandbox model and conduct human-computer interaction with the user. Through information transmission between the sand table, one or more interactive devices, GIS image processing equipment and MR interactive processing equipment, the two-dimensional and three-dimensional information data presented by the sand table and the holographic three-dimensional information data presented by one or more interactive devices can be Realize interactive linkage.

Description of the drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can also be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic structural diagram of a digital sandbox system disclosed in the embodiment of the present application;

Figure 2 is a schematic structural diagram of another digital sandbox system disclosed in the embodiment of the present application;

Figure 3 is a schematic structural diagram of a sand table body disclosed in the embodiment of the present application;

Figure 4 is a schematic diagram of the internal structure of a sand table body disclosed in the embodiment of the present application.

Detailed ways

The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and cannot be understood as limiting the present application.

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of this application.

With the development of virtual reality technology, the virtual environment can be simulated and presented through computers. The holographic sand table can use holographic display technology to integrate digital scenes, and then combine it with hardware devices to present a virtual three-dimensional sand table image. Holographic displays generally use holographic projection, 3D display and other technologies. Holographic displays are usually used to display holographic effects and cannot achieve interaction between the virtual world and the real world.

Front-projected Holographic Display is a technology that uses the principles of interference and diffraction to record and reproduce the true three-dimensional image of an object. Holographic electronic sand tables generally use 360° holographic display technology. This technology uses the projector or display screen and spectroscope inside the device, and uses optical principles to project the image on a high-speed rotating mirror, thereby suspending the three-dimensional map on the real scene. In mid-air imaging, the computer renders the video signal and integrates it to produce a multi-angle, all-round 360° three-dimensional suspended map image. It cooperates with the visual error of the human eye to create a spatial three-dimensional effect.

3D display technology is a new type of display technology. Compared with ordinary 2D screen display, 3D technology can make the picture become three-dimensional and realistic. The image is no longer limited to the plane of the screen, giving the audience an immersive feeling. According to the principle of the human eye, 3D display technology is divided into three types: chromatic aberration, polarization and active shutter. Holographic sand tables generally use polarization, also called polarization 3D technology (Polarization 3D), and are used in conjunction with passive polarized glasses. Polarized 3D technology uses the principle of "vibration direction" of light to decompose the original image. First, the image is divided into two groups of vertically polarized light and horizontally polarized light. Then the left and right sides of the 3D glasses use polarized lenses with different polarization directions. In this way, a person's left and right eyes can receive two sets of images, and then the three-dimensional images are synthesized by the brain.

However, the map data displayed by holographic projection technology is pre-made, and it can only display the pre-made content in a single way, and cannot interact with holographic data and display synchronous changes in two-dimensional data; the data of holographic imaging in 3D display technology is isolated and discrete. , cannot interact and link with two-dimensional data, and cannot reflect changes in data.

In order to solve the above problems, in the embodiment of the present application, the digital sandbox system includes a sandbox platform, one or more interactive devices, a geographic information system (Geographic Information System, GIS) image processing device, and mixed reality (Mixed Reality, MR) interactive processing. equipment, one or more interactive devices are respectively connected to the MR interactive processing device, and the GIS image processing device is respectively connected to the MR interactive processing device and the sand table body. The sand table body is used to display the sand table model and interact with users; the GIS image processing equipment is used to deploy GIS geographical applications and databases, and the database stores the sand table model; the MR interactive processing equipment is used to process and render the sand table model to obtain a holographic model; One or more interactive devices are used to present the holographic model of the sandbox model and conduct human-computer interaction with the user. Through information transmission between the sand table, one or more interactive devices, GIS image processing equipment and MR interactive processing equipment, the two-dimensional and three-dimensional information data presented by the sand table and the holographic three-dimensional information data presented by one or more interactive devices can be Realize interactive linkage.

Please refer to Figure 1, which is a schematic structural diagram of a digital sandbox system disclosed in an embodiment of the present application. As shown in FIG. 1 , the digital sandbox system may include a sandbox body 100 , a GIS image processing device 200 , an MR interactive processing device 300 and an interactive device 400 . One or more interactive devices 400 can be connected to the MR interactive processing device 300 respectively, and the GIS image processing device 200 can be connected to the MR interactive processing device 300 and the sand table 100 respectively;

The sand table body 100 is used to display the sand table model and interact with the user;

GIS image processing equipment 200, used to deploy GIS geographical applications and databases, and the database stores sandbox models;

MR interactive processing device 300 is used to process and render the sand table model to obtain a holographic model;

One or more interactive devices 400 are used to present the holographic model of the sandbox model and conduct human-computer interaction with the user.

Among them, the sand table model can include information data such as two- and three-dimensional geographic data, environmental data, and plotting symbols. The sandbox model can be a two-dimensional model or a three-dimensional model. The holographic model can be a holographic three-dimensional map constructed in real time by analyzing and rendering the sand table model and combining it with three-dimensional plotting and three-dimensional models. The GIS image processing device 200 can be used to process map data such as high-level maps, images, and vectors, and can also process data such as oblique photographic models, unit models, and plotting symbols. The GIS geographical application may include a data processing module, which may standardize map data imported by users through the sand table 100 to obtain a sand table model, and may store the sand table model in a database. The MR interactive processing device 300 can deploy an MR holographic interactive engine application, which can parse and render the information data of the sand table model and combine it with three-dimensional plotting and three-dimensional models to build a holographic three-dimensional map in real time. One or more interactive devices 400 have the function of resisting interference from the natural environment and are not affected by external light, ambient brightness, and indoor lighting. One or more interactive devices 400 also have an extremely large field of view. For example, the vertical field of view angle is no less than 57° and the horizontal field of view angle is no less than 70°. One or more interactive devices 400 can also automatically adjust the depth of the lens according to the light intensity of the external environment, so that the presented holographic model is not affected by environmental factors such as external light and indoor lighting.

After the digital sandbox system is started, the user can send a model acquisition request to the GIS image processing device 200 through the sandbox body 100 . After receiving the model acquisition request from the sand table 100, the GIS image processing device 200 may send all sand table models stored in the database to the sand table 100. After the sand table body 100 receives all sand table models sent from the GIS image processing device 200, all sand table models can be displayed.

In the case where all the sandbox models include the sandbox model required by the user, the user can select the required first sandbox module from all the sandbox models. After detecting the user's selection operation on the first sandbox model, the sandbox platform 100 can display the first sandbox model, and can send information about the first sandbox model to the GIS image processing device 200 . After receiving the information of the first sandbox model from the sandbox platform 100 , the GIS image processing device 200 may send the first sandbox model to the MR interactive processing device 300 . After receiving the first sandbox model from the GIS image processing device 200, the MR interactive processing device 300 can process and render the first sandbox model to obtain the first holographic model, and then can send the first holographic model to one or more interactive devices 400. After one or more interactive devices 400 receive the first holographic model from the MR interactive processing device 300, the first holographic model may be presented.

When all the sandbox models do not include the sandbox model required by the user, the user can import the data information corresponding to the first sandbox model to the GIS image processing device 200 through the sandbox platform 100 as needed. After receiving the data information corresponding to the first sand table model from the sand table body 100, the GIS image processing device 200 can determine the first sand table model based on the data information, and then can send the first sand table model to the sand table body 100 and the MR interactive processing device 300. Sand table model. After the sand table body 100 receives the first sand table model from the GIS image processing device 200, the first sand table model can be displayed. After receiving the first sandbox model from the GIS image processing device 200, the MR interactive processing device 300 can process and render the first sandbox model to obtain the first holographic model, and then can send the first holographic model to one or more interactive devices 400. After one or more interactive devices 400 receive the first holographic model from the MR interactive processing device 300, the first holographic model may be presented.

One or more interactive devices 400 are also used to detect the user's operation information on the holographic model and send the operation information to the MR interactive processing device;

The MR interactive processing device 300 is also used to update the holographic model according to the operation information, send the updated holographic model to one or more interactive devices 400, and send a synchronization request to the GIS image processing device 200 according to the operation information;

One or more interactive devices 400 are also used to present the updated holographic model;

The GIS image processing device 200 is also used to update the sand table model according to the synchronization request and send the updated sand table model to the sand table platform 100;

The sand table body 100 is also used to display the updated sand table model.

The operation information may include plotting information.

Two-way linkage can be performed between the sand table 100 and one or more interactive devices 400 . Bidirectional linkage can be various linkages. The linkage of plotting operation is taken as an example for explanation below.

When the user performs a plotting operation on the first sandbox model through the sandbox platform 100, the sandbox platform 100 can detect the user's first plotting information on the first sandbox model, and can send the first plot information to the GIS image processing device 200. Plot information. After receiving the first plotting information sent by the sand table 100, the GIS image processing device 200 can update the first sand table model according to the first plot information to obtain a second sand table model, and then can send the second sand table model to the sand table 100. , and can send the first synchronization request to the MR interaction processing device 300. After the sand table body 100 receives the second sand table model sent by the GIS image processing device 200, the second sand table model can be displayed. After receiving the first synchronization request sent by the GIS image processing device 200, the MR interactive processing device 300 can obtain the second sandbox model from the GIS image processing device 200. The MR interactive processing device 300 can process and render the second sandbox model to obtain a second holographic model corresponding to the second sandbox model. The MR interaction processing device 300 may send the second holographic model to one or more interaction devices 400. After one or more interactive devices 400 receive the second holographic model from the MR interactive processing device 300, the second holographic model may be presented. Wherein, the second sandbox model includes the user's plotting information of the first sandbox model. The first synchronization control instruction is used to realize interactive linkage from the sand table 100 to one or more interactive devices 400 . The second holographic model includes plotting information corresponding to the second sand table model.

When the user performs a plotting operation on the first holographic model through one or more interactive devices 400, the one or more interactive devices 400 may detect the user's second plotting information on the first holographic model and provide the MR interactive processing Device 300 sends second plot information. After receiving the second plotting information of one or more interactive devices 400, the MR interactive processing device 300 can update the first holographic model according to the second plotting information to obtain a third holographic model, and then can provide the third holographic model to the one or more interactive devices 400. The third holographic model is sent, and a second synchronization request may be sent to the GIS image processing device 200. After one or more interactive devices 400 receive the third holographic model from the MR interactive processing device 300, the third holographic model may be presented. After the GIS image processing device 200 receives the second synchronization request from the MR interactive processing device 300 , the third holographic model may be obtained from the MR interactive processing device 300 . The GIS image processing device 200 can update the first sand table model according to the third holographic model to obtain a third sand table model, and then can send the third sand table model to the sand table platform 100 . After the sand table body 100 receives the third sand table model from the GIS image processing device 200, the third sand table model can be displayed. Wherein, the third holographic model includes the user's plotting information of the first holographic model. The second synchronization control instruction is used to realize interactive linkage from one or more interactive devices 400 to the sand table 100 . The third sand table model includes plotting information corresponding to the third holographic model.

The digital sandbox system disclosed in Figure 1 may include a sandbox body 100, one or more interactive devices 400, a GIS image processing device 200, and an MR interactive processing device 300. The one or more interactive devices 400 are respectively connected to the MR interactive processing device 300. , the GIS image processing device 200 is connected to the MR interactive processing device 300 and the sand table 100 respectively. The sand table body 100 can display the sand table model and interact with users; the GIS image processing device 200 can deploy GIS geographical applications and databases, and the database stores the sand table model; the MR interactive processing device 300 can process and render the sand table model to obtain a holographic model; One or more interactive devices 400 can present a holographic model of the sandbox model and perform human-computer interaction with the user. Through information transmission between the sand table 100, one or more interactive devices 400, GIS image processing device 200 and MR interactive processing device 300, the two-dimensional and three-dimensional information data presented by the sand table 100 and one or more interactive devices 400 The holographic three-dimensional information data can achieve interactive linkage.

Please refer to Figure 2, which is a schematic structural diagram of another digital sandbox system disclosed in an embodiment of the present application. Among them, the digital sandbox system shown in Figure 2 is optimized from the digital sandbox system shown in Figure 1. As shown in Figure 2, the digital sandbox system may also include a holographic data exchange device 500.

The holographic data exchange device 500 connects one or more interactive devices 400, MR interactive processing device 300 and GIS image processing device 200 respectively.

The holographic data exchange device 500 can realize information transmission between one or more mutual devices and the MR interactive processing device 300, as well as information transmission between the MR interactive processing device 300 and the GIS image processing device 200.

The sand table body 100 can interact with the user, and can detect the user's first drawing information of the first sand table model. And send the first plotting information to the GIS image processing device 200. After receiving the first plotting information sent by the sand table 100, the GIS image processing device 200 can update the first sand table model according to the first plot information to obtain a second sand table model, send the second sand table model to the sand table 100, and The first synchronization request may be sent to the MR interaction processing device 300 through the holographic data exchange device 500. After the sand table body 100 receives the second sand table model sent by the GIS image processing device 200, the second sand table model can be displayed. After receiving the first synchronization request sent by the GIS image processing device 200, the MR interactive processing device 300 can obtain the second sandbox model from the GIS image processing device 200 through the holographic data exchange device 500. The MR interactive processing device 300 can process and render the second sandbox model to obtain a second holographic model corresponding to the second sandbox model. The MR interaction processing device 300 may send the second holographic model to one or more interactive devices 400 through the holographic data exchange device 500 . After one or more interactive devices 400 receive the second holographic model from the MR interactive processing device 300, the second holographic model may be presented.

One or more interaction devices 400 may interact with the user, may detect the user's second plotting information for the first holographic model, and may send the second plotting information to the MR interaction processing device 300 through the holographic data exchange device 500 . After receiving the second plotting information of one or more interactive devices 400, the MR interactive processing device 300 can update the first holographic model according to the second plotting information to obtain a third holographic model, and then can provide the third holographic model through the holographic data exchange device 500. The one or more interactive devices 400 send the third holographic model and the second synchronization request to the GIS image processing device 200 . After one or more interactive devices 400 receive the third holographic model sent by the MR interactive processing device 300, the third holographic model may be presented. After the GIS image processing device 200 receives the second synchronization request from the MR interactive processing device 300, it can obtain the third holographic model from the MR interactive processing device 300 through the holographic data exchange device 500. The GIS image processing device 200 can update the first sand table model according to the third holographic model to obtain a third sand table model, and then can send the third sand table model to the sand table platform 100 . After the sand table body 100 receives the third sand table model from the GIS image processing device 200, the third sand table model can be displayed.

The digital sand table system disclosed in Figure 2 may include a sand table body 100, one or more interactive devices 400, a GIS image processing device 200, an MR interactive processing device 300, and a holographic data exchange device 500. The sand table body 100 is connected to GIS image processing The device 200 and the holographic data exchange device 500 are respectively connected to one or more interactive devices 400, GIS image processing device 200 and MR interactive processing device 300. The sand table body 100 can display the sand table model and interact with users; the GIS image processing device 200 can deploy GIS geographical applications and databases, and the database stores the sand table model; the MR interactive processing device 300 can process and render the sand table model to obtain a holographic model; One or more interactive devices 400 can present the holographic model of the sandbox model and perform human-computer interaction with the user; the holographic data exchange device 500 can implement information transmission between one or more interactive devices 400 and the MR interactive processing device 300, and Information transmission between the MR interactive processing device 300 and the GIS image processing device 200. Through information transmission between the sand table 100, one or more interactive devices 400, GIS image processing device 200 and MR interactive processing device 300, the two-dimensional and three-dimensional information data presented by the sand table 100 and one or more interactive devices 400 The holographic three-dimensional information data can achieve interactive linkage.

Please refer to FIG. 3 , which is a schematic structural diagram of a sand table body 100 disclosed in an embodiment of the present application. As shown in Figure 3, the sand table body 100 may include a touch display screen 110 and a circumferential positioning plate 120, wherein:

Touch display screen 110, used to display the sandbox model and interact with the user;

The circumferential positioning plate 120 is used to cooperate with one or more interactive devices 400 to achieve spatio-temporal synchronization of the sand table model and the holographic model.

For example, the touch display screen 110 may be connected to the GIS image processing device 200 .

After the digital sandbox system is started, the user can obtain all the sandbox models stored in the GIS image processing device 200 through the sandbox platform 100 . The touch screen 110 can display all sandbox models. When all the sandbox models displayed on the touch screen 110 include the sandbox model required by the user, the user can select the required sandbox model. The sand table model can be displayed by touching the display screen 110 . If all the sandbox models displayed on the touch screen 110 do not include the sand table model required by the user, the user can import the required sand table model through the touch screen 110 . The sand table model can be displayed by touching the display screen 110 .

The touch display screen 110 can also detect the user's operation information on the sand table model. For example, when a user's plotting operation on the sandbox model is detected, the touch display screen 110 can obtain the plotting information and send the plotting information to the GIS image processing device 200 .

The circumferential positioning plate 120 can be an augmented reality (Augmented Reality, AR ⁾ code. One or more interactive devices 400 can be equipped with cameras. The camera can capture the AR code, and then the sandbox model can be implemented based on the AR code captured by the camera. Space-time synchronization with holographic models. There is no need to set up external cameras to achieve positioning and synchronization of 2D and 3D data with holographic 3D data, so the presentation of the 3D model is not restricted by the location of the real environment.

The sand table 100 may also include a cover 130 . The touch display screen 110 may be disposed on the top of the cover 130 , and the circumferential positioning plate 120 may be disposed circumferentially around the touch display screen 110 .

The sand table body 100 may further include a housing 140, and the housing 140 and the cover 130 are surrounded to form an accommodation cavity. One or more interactive devices 400, GIS image processing devices 200, MR interactive processing devices 300 and holographic data exchange devices 500 may be placed in the containing cavity.

The cover 130 and the shell 140 of the sand table 100 may be sheet metal structural parts.

Please refer to FIG. 4 , which is a schematic diagram of the internal structure of a sand table body 100 disclosed in an embodiment of the present application. As shown in FIG. 4 , the cover 130 and the shell 140 of the sand table 100 can be surrounded to form a receiving cavity, and one or more interactive devices 400 , GIS image processing devices 200 and MR interactive processing devices 300 can be placed in the receiving cavity. .

One or more pull-out storage cabinets 150 may be provided on the side of the casing 140 of the sand table 100 , and the one or more pull-out storage cabinets 150 may store one or more interactive devices 400 .

One or more aviation plugs 160 may be provided on the side of the housing 140 , and one or more interactive devices 400 may be connected to the holographic data exchange device 500 through the aviation plugs 160 .

A touch bar may be provided on the bottom side of the cover 130 of the sand table 100, and the touch bar may enable user interaction with the touch display screen 110.

A plurality of pulleys 170 are provided on the bottom side of the casing 140 of the sand table body 100. The plurality of pulleys 170 can facilitate the movement of the sand table body 100.

One or more interactive devices 400 may include an MR head-mounted display device. Users can interact with MR headsets. For example, the MR head-mounted display device can recognize and detect the user's actions and gestures, and then perform corresponding operations on the holographic model according to the user's actions and gestures, and send the operation information to the MR interactive processing device 300 .

One or more interactive devices 400 may also include handles connected to the MR head-mounted display device. Users can operate the holographic model through the handle. One or more interactive devices 400 can obtain the operation information of the handle and send the operation information to the MR interaction processing device 300 .

It can be understood that the same or related information in the above different embodiments can be referenced to each other. The above are only preferred embodiments of the present application and are not intended to limit the present application in any form. Although the present application has been disclosed as above with preferred embodiments, they are not intended to limit the present application. Any person skilled in the art may Without departing from the scope of the technical solution of the present application, the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments with equivalent changes. Any brief modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present application.

Claims (10)

1. A digital sand table system, characterized in that it includes a sand table body, one or more interactive devices, GIS image processing equipment and MR interactive processing equipment, wherein: The one or more interactive devices are respectively connected to the MR interactive processing device, and the GIS image processing device is connected to the MR interactive processing device and the sand table body respectively; The sand table body is used to display the sand table model and interact with the user; The GIS image processing device is used to deploy GIS geographic applications and databases, and the database stores the sandbox model; The MR interactive processing device is used to process and render the sand table model to obtain a holographic model; The one or more interactive devices are used to present the holographic model of the sandbox model and conduct human-computer interaction with the user. 2. The digital sandbox system according to claim 1, characterized in that the one or more interactive devices are also used to detect the user's operation information on the holographic model and send the MR interactive processing device. Operation information; The MR interactive processing device is also configured to update the holographic model according to the operation information, send the updated holographic model to the one or more interactive devices, and send synchronization messages to the GIS image processing device according to the operation information. ask; The one or more interactive devices are also used to present the updated holographic model; The GIS image processing device is also configured to update the sand table model according to the synchronization request and send the updated sand table model to the sand table platform; The sand table body is also used to display the updated sand table model. 3. The digital sandbox system according to claim 1 or 2, further comprising a holographic data exchange device, wherein: The holographic data exchange device is respectively connected to the one or more interactive devices, the MR interactive processing device and the GIS image processing device; The holographic data exchange device is used to realize information transmission between the one or more interactive devices and the MR interactive processing device, and information transmission between the MR interactive processing device and the GIS image processing device. . 4. The digital sand table system according to claim 3, wherein the sand table body includes a touch display screen and a circumferential positioning plate, wherein: The touch display screen is used to display the sandbox model and interact with the user; The circumferential positioning plate is used to cooperate with the one or more interactive devices to achieve spatio-temporal synchronization of the sand table model and the holographic model. 5. The digital sand table system according to claim 4, wherein the sand table body further includes a cover body, wherein: The touch display screen is disposed on the top of the cover, and the circumferential positioning plate is disposed circumferentially around the touch display screen. 6. The digital sand table system according to claim 5, wherein the sand table body further includes a housing, and the housing and the cover are surrounded to form an accommodation cavity, and the one or more interactive devices , the GIS image processing device, the MR interactive processing device and the holographic data exchange device are placed in the containing cavity; the GIS image processing device is connected to the touch display screen. 7. The digital sandbox system according to claim 5, wherein a touch bar is provided at the bottom of the cover body, and the touch bar is used to realize interaction between the user and the touch display screen. 8. The digital sand table system according to claim 6, wherein a plurality of pulleys are provided on the bottom side of the housing. 9. The digital sandbox system according to claim 1, wherein the interactive device includes an MR head-mounted display device. 10. The digital sandbox system according to claim 9, wherein the interactive device further includes a handle connected to the MR head-mounted display device.