KR102199940B1 - Method of constructing 3D map of mobile 3D digital twin using 3D engine - Google Patents

Abstract

Provided is an apparatus for processing digital terrain model (DTM) data according to the present invention. The DTM data processing apparatus includes: an interface unit configured to receive data associated with the DTM data; and a processor configured to construct DTM data that enables a display by applying a physical object as a virtual object in the form of a 3D digital twin, by using the cadastral control point, observation station coordinates, survey data, and modeling data acquired by using surveying equipment.

Description

Method of constructing 3D map of mobile 3D digital twin using 3D engine {Method of constructing 3D map of mobile 3D digital twin using 3D engine}

The present invention relates to a digital terrain model data construction and processing apparatus. In more detail, it relates to a method for constructing a 3D map of a mobile 3D digital twin through a 3D engine and an apparatus for performing the same.

A digital twin is a digital replica (twin) of physical objects (assets, processes and systems, etc.). Thus, digital twins can be defined as virtual models that maintain the properties/states of target object elements throughout their lifecycle and describe the dynamic nature of how they behave.

The digital twin in the existing smart city was mainly used for simulation and analysis, and accordingly, development for mobile has not been made.

In the case of a UAV image 3D map, there is a problem that the utility is very poor on mobile due to a large amount of mesh points.

In addition, in the case of the existing GIS software, there is a problem in that the concept of physics/gravity for a specific simulation must be separately introduced.

Accordingly, an object of the present invention is to provide a 3D map construction method of a mobile 3D digital twin through a 3D engine in order to solve the above-described problem.

In addition, an object of the present invention is to provide a method for constructing a 3D map of a mobile 3D digital twin through a 3D engine and an apparatus for performing the same.

In addition, it is an object of the present invention to provide a digital twin for a wide range of users through mobile portability.

A terrain model data processing apparatus according to the present invention for solving the above problems is provided. The digital terrain model data processing apparatus includes: an interface unit configured to receive data associated with digital terrain model (DTM) data; And it is configured to construct DTM data that can be displayed by applying a physical object as a virtual object in the form of a 3D digital twin using the cadastral reference point, the observatory coordinates, survey data, and modeling data acquired using the survey equipment. It may include a processor.

According to an embodiment, the processor constructs building modeling data using world coordinate values in DTM information to be used for the 3D digital twin, and moves the positions of the virtual objects on the world coordinates based on the building modeling data to provide the virtual object. You can control the location of each of them to be managed as separate data.

According to an embodiment, the processor may detect GPS location information from a GPS module, convert the corresponding GPS coordinates into world coordinates, and generate reference points for loading tile data based on the location of the world coordinates.

According to an embodiment, the processor loads tile data on which a collision is detected through a physical engine based on the position in the world coordinate as a 3D mesh data for the reference point in FBX format, and the 3D mesh data for the reference point through the physical engine. You can select a specific 3D mesh for each 3D mesh unit among mesh data.

According to an embodiment, the processor may calculate data corresponding to the values of the selected specific 3D mesh, and display data corresponding to the values on a 3D map in the world coordinates.

According to an embodiment, when the 3D mesh data is loaded, the processor loads numerical data representing the state of buildings and roads corresponding to the 3D mesh data through a specific key value, and when the specific 3D mesh is selected , The state of the building and the road may be displayed on a 3D map on the 3D digital twin through numerical data corresponding to the specific 3D mesh.

According to an embodiment, the processor uses point, line, and surface data related to the shape of the virtual object, RGB data or intensity data for the survey data, and modeling data outside the building to convert the physical object into a 3D digital twin. twin) can be applied as a virtual object.

According to an embodiment, the processor generates a vertex list around a reference point of the tile data load based on the location of world coordinates, and creates a face list associated with a surface formed to surround the virtual object based on the vertex list. And, based on the Face List, a plurality of physical objects may be mapped as virtual objects on a 3D digital twin.

According to an embodiment, the processor may build an image information database based on image data including satellite images, aerial photographs, and UAV images, topographic elevation data, and a 3D object mesh model. The processor may build a GIS database by converting GIS data of a hazardous area, POI data, GIS data merged with a specific service, and GIS data for each step of the specific service.

According to an embodiment, the processor is configured to interwork with the image information database and the GIS database, and the image data, topographic elevation data, and a 3D object mesh model, GIS data, POI data, and specific services Based on the merged GIS data and GIS data conversion for each step of the specific service, the state of buildings and roads may be displayed on a 3D map on the 3D digital twin through numerical data corresponding to a specific 3D mesh.

The technical effect of the digital terrain model data processing apparatus that performs the digital terrain model data construction and processing method according to the present invention will be described as follows.

In this regard, the advantages that can be obtained by building a 3D digital twin on mobile are as follows.

According to at least one embodiment of the present invention, it is possible to build a digital twin for a wide range of users through mobile portability.

In addition, according to at least one embodiment of the present invention, it is possible to provide a customized service using a personalization characteristic of a mobile.

In addition, according to at least one embodiment of the present invention, a method of constructing and processing digital terrain model data may be interlocked with various services using a mobile terminal function.

In addition, according to at least one embodiment of the present invention, by expressing a method of constructing and processing digital terrain model data through a location-based service, it is possible to implement a digital twin that general users who use an application can directly experience.

In addition, according to at least one embodiment of the present invention, it is possible to supplement the efficiency and accuracy in simulation and analysis, one of the main purposes of the digital twin, through the configuration of a 3D engine such as a physical engine and a gravity engine.

In addition, according to at least one embodiment of the present invention, a digital terrain model data construction and processing apparatus having a 3D engine configuration such as a physical engine and a gravity engine can be applied to various analyzes and simulations.

The features and effects of the present invention described above will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. I will be able to.

1 is a configuration diagram of a digital terrain model data processing apparatus that performs a digital terrain model data construction and processing method.
2 shows a flowchart and a conceptual diagram for expressing a 3D map of a digital twin through a 3D engine according to the present invention.
3 is a conceptual diagram for defining a point (Vertex) and a face (Face) for a plurality of objects.
4 shows the generation of grids and buffers on a national scale for cadastral-based world geodetic systems according to the present invention.
5 shows grid-based mesh data and orthogonal image segmentation according to the present invention.
6 shows mapping of an orthogonal image to mesh data for each grid according to the present invention.

The features and effects of the present invention described above will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. I will be able to.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

In describing each drawing, similar reference numerals are used for similar elements.

Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. These terms are used only for the purpose of distinguishing one component from another component.

For example, without departing from the scope of the present invention, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Shouldn't.

The suffix modules, blocks, and parts for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have meanings or roles that are distinguished from each other by themselves.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement them. In describing the embodiments of the present invention below, if it is determined that a detailed description of a related known function or a known configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, a method of constructing and processing digital terrain model data according to the present invention and a digital terrain model data processing apparatus performing the method will be described.

In this regard, a digital twin corresponds to a digital replica (twin) of physical objects (assets, processes and systems, etc.). Thus, digital twins can be defined as virtual models that maintain the properties/states of target object elements throughout their lifecycle and describe the dynamic nature of how they behave.

Meanwhile, digital twins in smart cities are implemented through 3D maps equipped with geographic information systems. In this regard, the present invention intends to combine the maximum connectivity, urban complexity, and smart city data hub and operation system brought about by the Fourth Industrial Revolution with a digital twin. Accordingly, it is possible to conceive of a smart city planning model that can be used for urban planning and management by grasping real-time urban conditions through the present invention.

Meanwhile, Unity3D described in this specification is an integrated authoring tool for creating interactive content such as game development environment, architectural visualization, and virtual reality (VR). Therefore, it is equipped with a 3D engine suitable for driving in mobile, and it can be equipped with a physical/gravity engine that is not equipped with existing GIS S/W. 3D engines such as Unity3D are a means to complement the efficiency and accuracy of simulation and analysis, which is one of the main purposes of digital twins.

The present invention intends to build a digital twin of such a smart city on a mobile through the Unity3D engine. In this regard, we intend to build a digital twin that citizens can experience based on not only the simulation and analysis functions of the existing digital twin, but also the portability, personalization, and real-time characteristics of mobile.

As described above, a digital twin base map to be loaded into the mobile Unity3D engine is described. In the present invention, a digital terrain model (DTM) data construction and processing device is provided. In addition, building modeling data processing can constitute a three-dimensional model of survey data consisting of points, lines, planes, Normal, RGB, Intensity, etc. based on cadastral-based world geodetic systems. In addition, it is possible to reduce the size of data, simplify production, and secure the ease of object movement by applying a grid-shaped tile map through the present invention.

In addition, data separately constructed using absolute coordinate values through the present invention can be utilized at the same location through coordinate system matching, and thus selective update is possible. Through this, reliability between space and location within the digital twin, three-dimensional spatial analysis, three-dimensional simulation, and service application are possible.

A method of constructing and processing digital terrain model data according to the present invention having such technical features and effects, and a digital terrain model data processing apparatus performing the method may be expressed as shown in FIG. 1. 1 is a block diagram of a digital terrain model data processing apparatus that performs a digital terrain model data construction and processing method.

Referring to FIG. 1, since the digital terrain model data processing apparatus can construct and process digital terrain model data, it may be referred to as a DTM data construction and processing apparatus. The digital terrain model data processing apparatus can be configured to include an interface unit (100) and a processor (200). The digital terrain model data processing apparatus may further include a display 300 and a memory 400.

The interface unit 100 may be configured to receive data associated with digital terrain model (DTM) data. In this regard, the interface unit 100 may be configured to exchange data with various user terminals. In addition, the interface unit 100 may be configured to store data in various databases or to search and receive data therefrom.

The processor 200 uses the cadastral reference point, observatory coordinates, survey data and modeling data acquired using the survey equipment, and applies the physical object as a virtual object in the form of a 3D digital twin and displays DTM data. Can be configured to build.

The display 300 is operatively coupled to the processor 200 and may display a screen associated with a digital terrain model. Further, the memory 400 is operatively coupled to the processor 200 and may store information related to a digital terrain model.

In this regard, the DTM data construction and processing apparatus may collect and analyze data measured by various surveying equipment to provide a topographic structure including a plurality of objects as a base map. On the other hand, the DTM data construction and processing device may provide the remaining structures by removing the ground structures from the smart city digital twin as a base map. The DTM data construction and processing apparatus may be implemented as a computer or a server corresponding to a program. The DTM data construction and processing device can be wirelessly connected to various user terminals through Bluetooth, WiFi, and a communication network, and can exchange data with user terminals through a network.

In an embodiment, the DTM data construction and processing apparatus may store data necessary for predictive management of civil complaints in connection with a database. The DTM data construction and processing apparatus may be implemented including a database. Also, the DTM data construction and processing apparatus may be implemented including a processor, a memory, a user input/output unit, and a network input/output unit. In this regard, referring to FIG. 1, an apparatus for constructing and processing DTM data may include a processor 200 and a memory 400. Meanwhile, the user input/output unit and the network input/output unit may be implemented as an interface unit (100). In this regard, the user output unit may be implemented as the display 300.

The database may correspond to a storage device that stores information required in the process of building and processing DTM data. For example, the database may store collected survey data and mesh data, and may store information of the collected data and a base map derived through analysis. In addition, the database may be composed of a plurality of database modules to store and manage each information, and each database module may be connected to a network to form one base group.

In this regard, the spatial information data DB construction process in the DTM data construction and processing apparatus performing the DTM data construction and processing method according to the present invention may be implemented as follows. In this regard, the process of constructing the spatial information data DB is not limited thereto and can be changed according to the application.

[Spatial information data DB construction]

□ Video information data construction

* Video mosaic and service pyramid video production

-Satellite image: Korean Peninsula, Gyeonggi-do

-Aerial image: Suwon, Paldal-gu

-UAV video: around Haenggung-dong

* Terrain elevation data editing and service processing

-Suwon-si, 30m class: Paldal-gu, Suwon-si

-Sugodo model 1m class: Haenggung-dong area

* 3D object mesh model production and conversion for mobile visualization

-3D object mesh model production based on UAV image (3~5cm) captured in Haenggung-dong area

-Construction and transformation of 3D objects for mobile visualization

□ GIS data construction

* Produce GIS data for the region

* Secure and build POI (point of interest information) in the region

* Service data construction and conversion

-Merged GIS data for service

-GIS data conversion by service level

Meanwhile, it is possible to display a 3D map of a digital twin through a Unity3D engine operating in the digital terrain model data processing apparatus according to the present invention. In this regard, FIG. 2 shows a flowchart and a conceptual diagram for expressing a 3D map of a digital twin through a 3D engine according to the present invention.

Referring to FIG. 2, 1) location information of a user may be acquired (updated) by updating location information in a GPS module of a device (S100). Here, the user location may be a location of a specific user designated by such a user in addition to the location of a user using the device. 2) The obtained GPS location information may be converted into world coordinate location information (S200). Accordingly, a reference point for loading tile data according to a user location may be generated (S300). In addition, it is possible to detect whether a reference point for loading tile data according to a user's position and a physical engine collide. 3) In this regard, it is possible to load (S400) a tile of a corresponding area that has entered the collision detection range of the physical engine.

In the series of such processes, that is, 1) a process of obtaining location information to 3) a process of loading a tile of a corresponding region entering the collision detection range of the physical engine, it may be determined whether the user location has changed (S400). Therefore, 1) a process of obtaining location information to 3) a process of loading a tile in a corresponding area entering the collision detection range of the physical engine may be repeatedly performed when the user location is changed. That is, if it is determined that the user location has changed (S400), a series of processes may be repeated again from the process of acquiring (update) the user's location information (S100).

Meanwhile, the digital terrain model data processing apparatus according to the present invention may generate mesh data based on raw data constructed through a survey device. In this regard, FIG. 3 is a conceptual diagram for defining a vertex and a face for a plurality of objects. Referring to FIG. 3, the digital terrain model data processing apparatus according to the present invention may be referred to as a 3D mesh data processing apparatus. The 3D mesh data processing device generates mesh data based on normal information in raw data (points, lines, planes) built through various surveying devices such as UAV and LiDAR. Raw data such as point, line, and surface data may include values such as RGB and intensity depending on the type of cadastral-based geodetic instrument and surveying equipment.

4 shows the generation of grids and buffers on a national scale for the cadastral-based world geodetic system according to the present invention. Referring to FIG. 4, a tile map in the form of a grid is constructed so that the generated mesh data can be loaded from the user's position point. The tile map can be composed of two types. The first tile map can form a grid based on the world geodetic system based on the world geodetic system, based on the territory under the sovereignty of the Republic of Korea. Second, the grid can be created by creating a buffer in the grid for texture mapping.

In addition, a spatial concept is assigned to each grid so that it is easy to determine the approximate location, and the system is as concise as possible, and the system is designed to include a logical spatial concept. Improves.

5 shows grid-based mesh data and orthogonal image segmentation according to the present invention. Referring to FIG. 5, mesh data is divided into tile-type mesh data according to a grid, and the location information is stored so as to be essentially included. In addition, the orthogonal image to be texture mapped is also divided according to the buffer grid and stored so that the location information is essentially included.

6 shows mapping of an orthogonal image to mesh data for each grid according to the present invention. Referring to FIG. 6, a mapping process is performed on a divided orthogonal image according to each divided mesh data. The divided orthogonal image is mapped to mesh data according to image world geodetic coordinates and pixel size for each grid.

Mesh data linked to image property values can be exported in various 3D file formats that can be used and used. For use in Unity for mobile digital twin, it is converted into FBX file format and loaded.

Building modeling data can be processed using world geodetic coordinates acquired through surveying equipment to model the exterior of the building. In addition, the building modeling data is processed using the world geodetic coordinate values acquired through the surveying equipment, and the roof surface is merged with the existing building exterior modeling data using UAV image and UAV mesh modeling. It is possible to build modeling data.

DTM data construction and processing device is an important device used for basic base map in smart city digital twin by mapping accurate mesh data and orthogonal image based on the coordinate system. Reliability between space and location, 3D spatial analysis, 3D simulation, service It can contribute to application, etc.

[Apply spatial information data]

1. Detects GPS location information from the device's GPS module, converts the GPS coordinates to the coordinates of the Unity world, and creates reference points for loading tile data based on the location of the Unity world.

2. After applying a physics engine function that detects a certain range of collisions based on the location of the Unity world, loads the 3D mesh data in FBX format for the corresponding physical engine function and the tile load reference point where the collision is detected.

3. When moving the viewpoint within the Unity world, the location information is updated in real time through the process of converting the Unity world coordinates back to GPS coordinates. This is the same as the reference point coordinates of tile data loading, and acts as a measure that can select and retrieve mesh data located at the corresponding GPS coordinates locally or from the server. Therefore, it is possible to load and release data as much as necessary according to the movement of the viewpoint within the Unity world.

4. When loading each 3D mesh data, numerical data representing the state of buildings and roads corresponding to the data can be loaded together through a specific key value. This too can be expressed in units of 3D mesh through Unity's physics engine, and data corresponding to these values when a specific 3D mesh is selected.

According to the detailed description of the digital terrain model data construction and processing method as described above, the digital terrain model data processing apparatus will be described as follows. 1 to 6, the interface unit 100 may be configured to receive data associated with digital terrain model (DTM) data. In this regard, the interface unit 100 may be configured to exchange data with various user terminals. In addition, the interface unit 100 may be configured to store data in various databases or to search and receive data therefrom.

The processor 200 uses the cadastral reference point, observatory coordinates, survey data and modeling data acquired using surveying equipment, and applies a physical object as a virtual object in the form of a 3D digital twin and displays DTM data. Can be configured to build.

The processor 200 constructs building modeling data using world coordinate values in DTM information to be used for 3D digital twins, and moves the locations of virtual objects on the world coordinates based on the building modeling data to separate the locations of the virtual objects. Can be managed with the data of

The processor 200 may detect GPS location information from a GPS module, convert the corresponding GPS coordinates into world coordinates, and generate reference points for loading tile data based on the location of the world coordinates.

The processor 200 may load tile data on which a collision is detected through a physical engine based on a position in world coordinates as 3D mesh data for the reference point in FBX format. In addition, the processor 200 may select a specific 3D mesh in units of each 3D mesh among the 3D mesh data through a physical engine.

The processor 200 may calculate data corresponding to values of the selected specific 3D mesh, and may display data corresponding to the values on a 3D map in world coordinates. Specifically, when loading the 3D mesh data, the processor 200 may load numerical data representing the state of buildings and roads corresponding to the 3D mesh data through a specific key value. When a specific 3D mesh is selected, the processor 200 may control to display the state of the building and the road on a 3D map on the 3D digital twin through numerical data corresponding to the specific 3D mesh.

The processor 200 may use point, line, and surface data related to the shape of the virtual object, RGB data or intensity data for the survey data, and modeling data outside the building. Accordingly, the processor 200 may apply the physical object as a virtual object on a 3D digital twin by using the above-described data.

The processor 200 may generate a vertex list around a reference point for loading tile data based on a location of world coordinates. Also, the processor 200 may generate a face list associated with a face formed to surround the virtual object based on the vertex list. Accordingly, the processor 200 may map a plurality of physical objects to virtual objects on a 3D digital twin based on the Face List.

The processor 200 may build an image information database based on image data including satellite images, aerial photographs, and UAV images, topographic elevation data, and a 3D object mesh model. Accordingly, the processor 200 may build a GIS database through GIS data of a corresponding region, POI data, GIS data merged with a specific service, and GIS data for each step of the specific service.

The processor 200 may be configured to interwork with an image information database and the GIS database. Accordingly, the processor 200 is based on image data, topographic elevation data, and 3D object mesh model, GIS data of the region, POI data, GIS data merged with a specific service, and GIS data conversion for each step of the specific service. Thus, the state of buildings and roads can be displayed on a 3D map on the 3D digital twin through numerical data corresponding to a specific 3D mesh.

In the above, a digital terrain model data processing apparatus that performs a digital terrain model data construction and processing method according to the present invention has been described. The technical effect of the digital terrain model data processing apparatus that performs the digital terrain model data construction and processing method according to the present invention will be described as follows.

In this regard, the advantages that can be obtained by building a 3D digital twin on mobile are as follows.

According to at least one embodiment of the present invention, it is possible to build a digital twin for a wide range of users through mobile portability.

In addition, according to at least one embodiment of the present invention, it is possible to provide a customized service using a personalization characteristic of a mobile.

In addition, according to at least one embodiment of the present invention, a method of constructing and processing digital terrain model data may be interlocked with various services using a mobile terminal function.

In addition, according to at least one embodiment of the present invention, by expressing a method of constructing and processing digital terrain model data through a location-based service, it is possible to implement a digital twin that general users who use an application can directly experience.

In addition, according to at least one embodiment of the present invention, it is possible to supplement the efficiency and accuracy in simulation and analysis, one of the main purposes of the digital twin, through the configuration of a 3D engine such as a physical engine and a gravity engine.

In addition, according to at least one embodiment of the present invention, a digital terrain model data construction and processing apparatus having a 3D engine configuration such as a physical engine and a gravity engine can be applied to various analyzes and simulations.

The features and effects of the present invention described above will become more apparent through the following detailed description in connection with the accompanying drawings, and accordingly, those of ordinary skill in the technical field to which the present invention pertains can easily implement the technical idea of the present invention. I will be able to.

In the present invention, various modifications may be made and various embodiments may be provided, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

According to the software implementation, not only the procedures and functions described in the present specification, but also design and parameter optimization for each component may be implemented as a separate software module. The software code can be implemented as a software application written in an appropriate programming language. The software code may be stored in a memory and executed by a controller or a processor.

Claims (10)

In the digital terrain model data processing device,
An interface unit configured to receive data associated with Digital Terrain Model (DTM) data; And
A processor configured to construct DTM data that can be displayed by applying a physical object as a virtual object in the form of a 3D digital twin, using cadastral reference points, station coordinates, survey data, and modeling data acquired using survey equipment. Including,
The processor,
Building modeling data using world coordinate values is constructed in DTM information to be used for the 3D digital twin, and the locations of virtual objects are moved on world coordinates based on the building modeling data to manage the locations of the virtual objects as separate data. Digital terrain model data processing device, characterized in that. delete The method of claim 1,
The processor,
A digital terrain model data processing apparatus that detects GPS location information from a GPS module, converts the corresponding GPS coordinates into world coordinates, and generates reference points for loading tile data based on the location of the world coordinates. The method of claim 3,
The processor,
Load tile data for which collision is detected through a physical engine based on the position in the world coordinate as 3D mesh data for the reference point in FBX format,
A digital terrain model data processing apparatus for selecting a specific 3D mesh in units of each 3D mesh among the 3D mesh data through the physical engine. The method of claim 4,
The processor,
Calculate data corresponding to the values of the selected specific 3D mesh,
The digital terrain model data processing apparatus, characterized in that the data corresponding to the numerical values are displayed on the 3D map in the world coordinates. The method of claim 5,
The processor,
When loading the 3D mesh data, numerical data representing the state of buildings and roads corresponding to the 3D mesh data are loaded together through a specific key value,
When the specific 3D mesh is selected, the digital terrain model data processing apparatus displays the state of the building and the road on a 3D map on the 3D digital twin through numerical data corresponding to the specific 3D mesh. The method of claim 1,
The processor,
Applying the physical object as a virtual object on a 3D digital twin using point, line, surface data related to the shape of the virtual object, RGB data or intensity data for the survey data, and modeling data outside the building A digital terrain model data processing device, characterized in that. The method of claim 7,
The processor,
Create a vertex list around the base point of the tile data load based on the location of the world coordinates,
Create a face list associated with a face formed to surround the virtual object based on the vertex list,
A digital terrain model data processing apparatus for mapping a plurality of physical objects to virtual objects on a 3D digital twin based on the Face List. The method of claim 1,
The processor,
Build an image information database based on image data including satellite images, aerial images and UAV images, topographic elevation data, and 3D object mesh models,
A digital terrain model data processing apparatus, characterized in that constructing a GIS database through GIS data of a corresponding region, POI data, GIS data merged with a specific service, and GIS data conversion for each step of the specific service. The method of claim 9,
The processor,
It is configured to interwork with the image information database and the GIS database,
Based on the image data, topographic elevation data, and 3D object mesh model, GIS data of the region, POI data, GIS data merged with a specific service, and GIS data conversion for each step of the specific service, to a specific 3D mesh A digital terrain model data processing apparatus that displays the state of buildings and roads on a 3D map on the 3D digital twin through corresponding numerical data.

Images