KR102160990B1 - Server and method for 3d city modeling based on object, and system using the same - Google Patents

Abstract

An object-based 3D city modeling system including a user terminal and a modeling server is provided. The modeling server of the 3D city modeling system includes: a database unit for storing modeling data such as digital topographic maps, cadastral maps, city image data, and IOT information; An object that classifies the modeling data into an element without a volume and an element with a volume, performs 3D object modeling using a 3D modeling tool, and registers an object by correcting GPS coordinates of the modeled object A modeling unit; And a controller for transmitting data linked to the selected object to the user terminal in response to an object selection signal received from the user's terminal.

Description

Object-based 3D city modeling method, server implementing it, and system using it {SERVER AND METHOD FOR 3D CITY MODELING BASED ON OBJECT, AND SYSTEM USING THE SAME}

The present invention relates to a city modeling method, a server implementing the same, and a system using the same, and more specifically, an object-based 3D city modeling method capable of containing city information, an algorithm-based server implementing the same, and a system using the same. About.

Data collected from sensors or public data and all information systems are connected through a wireless network or RFID (radio-frequency identification) tag to provide one-stop administrative services, automated traffic/security/disaster prevention systems, and home networking in residential spaces. The existing U-city (Ubiquitous City) project for the same service was reduced to a passive control project incorporating CCTV, and even though a lot of costs were invested, no results were achieved.

In addition, in Korea, there have been studies on urban operation models (smart big board, V-World, U-city status board, etc.), but most of them are two-dimensional/geometric information-oriented systems that integrate information generated in cities. It was a very rudimentary level that could not be handled effectively.

On the other hand, as a solution to this, a new smart city business has emerged, and the smart city is being implemented through a virtualized model (digital twin) that can simulate various services required by cities. The digital twin model, known as the world's excellent urban management information processing system, can be found in Singapore's current case, and a digital twin model called Virtual Singapore is being developed at the national level as a focus of smart city projects.

However, since the Singapore system is based on a photographic model, as in the case of the existing domestic case, tremendous cost (approximately 80 billion won) and effort are required for information processing, and there are many limitations in performing functions as an information processing system such as data link connection or data utilization. Exists. In addition, methods proposed to overcome this are also modeled based on shape, and there are many difficulties in information processing/implementation/analysis as a system for implementing city services.

Therefore, there is a need for an efficient and economical object-oriented 3D city modeling technology that is not based on images such as photographs.

Korean Registered Patent Publication No. 10-1314120 Korean Registered Patent Publication No. 10-1876114

The problem to be solved by the present invention is to provide a 3D city modeling method that provides an efficient object-oriented 3D city model that can overcome the limitations of the existing shape and image-based methods, an algorithm-based server that implements the same, and an integrated system. Is to do.

In addition, the problem to be solved by the present invention is to provide a 3D computer model-based city operation/management information processing system that can provide various integrated information using SketchUp and object-oriented programming, Ruby Code. To provide.

In addition, the problem to be solved by the present invention is a 3D city modeling method that is easy to process and modify when a model needs to be updated, such as a change or integration of a facility, a model capable of implementing a city service, and a server implementing the same, And it is to provide the system.

According to an embodiment of the present invention, an object-based 3D city modeling system including a user terminal and a modeling server is provided. The user terminal of the 3D city modeling system; A display unit for displaying the modeled 3D city model; A database storing modeling data such as digital topographic maps, cadastral maps, city image data, and IOT information including a user operation unit capable of selecting, expanding or reducing a specific object included in the 3D city model Wealth; An object that classifies the modeling data into an element without a volume and an element with a volume, performs 3D object modeling using a 3D modeling tool, and registers an object by correcting GPS coordinates of the modeled object A modeling unit; And a controller for transmitting data linked to the selected object to the user terminal in response to an object selection signal received from the user's terminal.

In addition, according to another embodiment of the present invention, a city modeling method of an object-based 3D city modeling system is provided. The urban modeling method includes collecting modeling data such as digital topographic map, cadastral map, city image data, and IOT information; Classifying the modeling data into an element having no volume and an element having a volume, and performing 3D object modeling on the classified modeling data using a 3D modeling tool; Registering an object by correcting GPS coordinates of the modeled object; In response to an object selection signal received from an external user terminal, data linked to the selected object may be transmitted to the user terminal.

According to an embodiment of the present invention, a 3D city modeling method providing an efficient object-oriented 3D city model capable of overcoming the limitations of an existing shape and image-based method, a server implementing the same, and a system may be provided.

According to an embodiment of the present invention, a 3D computer model based city operation/management information processing system capable of providing various integrated information using sketchup and ruby code, which is object-oriented programming, may be provided.

In addition, according to an embodiment of the present invention, a 3D city modeling method, a server implementing the same, and a system may be provided that can be easily processed and modified when a model is required to be updated such as a change or integration of a facility.

As a result, it is possible to construct a digital twin of the city with significantly less cost and effort, and a 3D city modeling method that can be extended to various domains required in a smart city, such as visualization of atmospheric environment and energy information, disaster management, and influx of population analysis. And a server and a system implementing the same may be provided.

1A, 1B, and 1C are diagrams for comparing the present invention with conventional city modeling.
2 is a control block diagram of a 3D city modeling system according to an embodiment of the present invention.
3 is a control flowchart illustrating a 3D city modeling method according to an embodiment of the present invention.
4 is a control flowchart illustrating an object modeling method according to an embodiment of the present invention.
5 is a control flowchart illustrating an object modeling method according to another embodiment of the present invention.
6 is a control flowchart illustrating an object registration method according to an embodiment of the present invention.
7 is a diagram illustrating an example of application of city modeling according to an embodiment of the present invention.
8 is a diagram illustrating a computing device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art can easily implement the embodiments of the present invention. However, the present invention may be implemented in various different forms, and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

In this specification, redundant descriptions of the same components are omitted.

In addition, in the present specification, when a component is referred to as being'connected' or'connected' to another component, it may be directly connected or connected to the other component, but other components in the middle It should be understood that may exist. On the other hand, in the present specification, when it is mentioned that a certain element is'directly connected' or'directly connected' to another element, it should be understood that no other element exists in the middle.

In addition, terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention.

In addition, in the present specification, a singular expression may include a plurality of expressions unless the context clearly indicates otherwise.

In addition, in the present specification, terms such as'include' or'have' are only intended to designate the existence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, and one or more It is to be understood that the presence or addition of other features, numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being excluded.

In addition, in this specification, the term'and/or' includes a combination of a plurality of listed items or any of a plurality of listed items. In the present specification,'A or B'may include'A','B', or'both A and B'.

In addition, in this specification, detailed descriptions of known functions and configurations that may obscure the subject matter of the present invention will be omitted.

The digital twin, which is a recent issue for urban modeling, digitizes systems, urban infrastructure, environment, energy, and traffic in a virtual space as a dynamic software model, and synchronizes the digitized twin with IoT-based real-time collected data. It is implemented in a virtual world in a computer for real-time prediction and optimal operation support. Digital twin technology is being used to identify and solve problems that may arise through simulation tests before making actual products.

In other words, digital twin refers to a technology that creates an object (twin) that is identical to a real object in a virtual space and verifies it through various simulation tests (simulations).It is a concept first advocated by the American home appliance company General Electric (GE). It was introduced into the manufacturing industry in the 2000s and is also used in various fields such as aviation, construction, healthcare, energy, defense, and urban design.

Using this digital twin technology, it is possible to monitor the health of equipment, systems, etc. in a virtual world, and identify the timing of maintenance and repair for improvement. It can predict various situations that may occur during operation to verify safety or reduce the risk of accidents by preventing unexpected accidents. In addition, it can lead to results such as improved productivity and equipment optimization, and can significantly reduce the cost and time required for prototyping.

On the other hand, in terms of urban-scale digital twins, as in the digital twin model presented in Singapore, performing modeling based on photographs or shape information through 3D scanning using aircraft to build a digital twin of a city requires enormous capital as well as images. In order to insert data to be linked, it is inconvenient to annotate images or assign coordinates to photos individually. Considering the size of the city, it is almost impossible to annotate facilities in the whole city or assign coordinates to photos. It is close to Therefore, there is a problem in that it is difficult to simulate various information of a city that changes in real time or to use integrated information.

On the other hand, the present invention implements a 3D digital twin based on an object, which reproduces the real physical world in a virtual space for smart city data input, analysis, visualization, and smart city facility control, and for this purpose, a 3D object creation tool It is characterized by using In SketchUp and Ruby Code, an object-oriented program.

1A, 1B, and 1C are diagrams for comparing the present invention with conventional city modeling.

1A is a conceptual diagram of a 3D object model digital twin according to the present invention. As shown, all facilities of a city including buildings and terrain are objectified for city modeling, and data for each object is objectified as city center information. It can be implemented in two steps.

In the object model-based digital twin, all components, that is, individual elements, have data as one object, and through this, the digital twin model itself can analyze, predict, visualize, and control images and data.

For example, simulation through visualization and analysis of building information and data is possible, and various control of urban areas such as buildings, facilities, facilities, traffic and atmospheric environment and energy information through digital twins is possible. In addition, it is possible to visualize city center information and to simulate and predict various items that may occur in the city according to the needs of users. In addition, it is possible to select sensors and CCTVs that implement city information and to share real-time screens.

That is, the present invention automatically imports big data such as building information, geographic information, IOT information, etc. from a Ruby code-based algorithm to make it object, and is used for multidimensional spatial analysis and visualization for urban service implementation. We propose a data processing process that can be used. As a result, it is possible to shorten the construction time of the digital twin model, create an excellent driving environment that does not require a large-scale computing environment, provide an optimal modeling system that satisfies the requirements of efficiency and accuracy, and is cost-effective. Also, compared to the 3D scanning method (Virtual Singapore) using the existing aircraft, it can save to a level of less than 1/10. In addition, since the open source-based lightweight DB access algorithm can be loaded through Ruby code, the digital twin's own data storage can also be secured.

FIG. 1B is a picture showing an existing U-City environment, using an extra-large screen and computing resources of the highest specifications.

On the other hand, FIG. 1C shows a user terminal of the city modeling system according to the present invention, and city modeling may be implemented in the user terminal. That is, according to the present invention, city modeling can be sufficiently implemented even at the level of a lightweight personal PC rather than an extra-large screen as shown in FIG. 1B or a computer with the highest specifications.

The user terminal may include a personal PC-level computer including various input devices such as a touch screen, a mouse, and a keyboard, and the user can inquire or process city information displayed on the user terminal very easily on a 3D model.

In addition, a lightweight 3D model can be displayed on the user terminal first, and data for each object in the modeling (e.g., large-capacity big data such as atmospheric environment, energy information, traffic information, etc.) is utilized as necessary. It is possible to input and output with fast processing speed.

2 is a control block diagram of a 3D city modeling system according to an embodiment of the present invention.

As shown, the 3D city modeling system according to the present embodiment includes a user terminal 100 and a modeling server 200, and the user terminal 100 and the modeling server 200 are connected to each other through a wired/wireless network. You can give and take.

The user terminal 100 selects and enlarges a communication unit 110 capable of communicating with the modeling server 200, a display unit 120 for displaying a modeled 3D city model, and a specific object included in the 3D city model. Alternatively, it may include a user manipulation unit 130 that can be reduced. The user terminal 100 may be implemented with various computing devices that may include the display unit 120 such as a personal PC, a portable phone, and a tablet PC.

The communication unit 110 may communicate with the modeling server 200 in one or more of various methods such as WLAN, Wi-Fi, WiBro, WiMAX, HSDPA, short-range wireless communication, infrared communication, UWB, or short-range wired communication.

The display unit 120 displays a 3D city model and various graphic user interfaces, and any means that can guide information to users such as LCD, TFT-LCD, LED, OLED, AMOLED, flexible display, and 3D display can be used. Do.

The user control unit 130 may include one or more of various methods such as button input, touch input, motion input, and voice input. The button input generates a command corresponding to each of a plurality of buttons, and typically includes a keypad and a keyboard. The touch input generates a command by detecting a touch motion, and includes a touch pad, a touch screen, and a touch sensor. The motion input recognizes a command corresponding to a preset specific motion such as a voice, moving a pointer, or tilting or shaking the user terminal 100, and may be implemented with a microphone, a mouse, a camera, an RGB sensor, a proximity sensor, or the like. The user may select, enlarge or reduce a specific object included in the 3D city model using the user manipulation unit 130.

On the other hand, the display unit 120 and the user operation unit 130 may be configured to be independently separated, but when the user terminal 100 employs a means capable of comprehensively performing input and output such as a touch screen, Of course it can be combined.

In addition, the user terminal 100 may further include a control unit for controlling the illustrated components and for controlling input/output of data, and a storage unit for storing object information provided from the modeling server 200.

The modeling server 200 may include a control unit 210, a database unit 220, and an object modeling unit 230. In addition, the modeling server 200 may further include a communication unit (not shown) for communicating with the user terminal 100 and a processing unit for collecting data for city modeling.

The database unit 220 stores modeling data such as digital topographic maps, cadastral maps, city image data, IoT information, and information collected through various paths. Atmospheric environment information, energy information, traffic information, which can be linked to objects, Road guidance information, population information, building maintenance cost information, building power usage information, and building aging information can be stored as big data.

In addition, the database unit 220 may register the GPS coordinates of the modeled object, the ID of the object, and the like, and all such data may be updated in response to user manipulation and data change.

The object modeling unit 230 classifies the modeling data stored in the database unit 220 into an element without a volume and an element with a volume, and performs 3D object modeling using a 3D modeling tool, The object is registered by correcting the GPS coordinates of the modeled object.

The object modeling unit 230 according to the present embodiment is a dynamic object-oriented script programming language in order to import data stored in the database unit 220, automatically objectify the imported data, and link data corresponding to the object. In Ruby code is used. Ruby code is a pure object-oriented language, and treats everything such as data types including integers and strings as objects, and corresponds to a computer information processing tool that automatically objectsizes a city model in the present invention. According to the present embodiment, since a lightweight DB access algorithm based on an open source can be mounted through Ruby code, it is possible to increase the utilization of the data storage space of the digital twin itself.

In addition, the object modeling unit 230 expresses the surface of the object by using a 3D modeling tool such as SketchUp, and creates a sense of volume by assigning properties to the modeling data classified according to the presence or absence of a volume, grouping them to make an object, and texture Perform the task and correct the generated elements. 3D object modeling using sketchup will be described in detail with reference to FIGS. 3 to 6 below.

The controller 210 may supervise communication with the user terminal 100 and control a city modeling process performed by the object modeling unit 230, that is, data collection, data storage, data transmission, and the like. In addition, the control unit 210 according to the present embodiment transmits data linked to the selected object to the user terminal 100 in response to an object selection signal received from the user's terminal 100. The control unit 210 may be merged with the object modeling unit 230 to be configured as a single module.

3 is a control flowchart illustrating a 3D city modeling method according to an embodiment of the present invention.

First, the modeling server 200 may collect modeling data such as digital topographic maps, cadastral maps, city image data, and IOT information through various routes (310).

Modeling data may be collected through cooperation with various government offices and institutions, or may be dynamically and automatically collected through Internet networks and other communication lines. All of the collected data is stored in the database unit 220 and may be updated at regular intervals. For data collection, various tools that are conventionally and currently used may be used.

The modeling data collected in this way is called into the object modeling unit 230 through the Ruby code, and the object modeling unit 230 may classify the modeling data into layers and elements and process them into basic data that can be used for modeling ( 320).

A layer refers to a specific data group classified in the process of collecting and visualizing existing various data in a model in order to express environmental information or energy information in the urban model constituting a smart city. For example, when visualizing the flow of fine dust in a 3D city model, the visualized flow of fine dust can be viewed as one layer. Elements refer to individual configurations that can be objectified in urban modeling. The processing of modeling data can be performed using various computer tools such as AutoCAD, and through this process, simple data is arranged so that it can be implemented on a computer.

Then, the object modeling unit 230 filters only essential data necessary for 3D object modeling from the processed basic data (330).

Filtering may be performed by determining whether the organized basic data includes data necessary to construct a 3D city model. As a result of the determination, only elements that contain necessary data are used for modeling, and data on elements that do not can be deleted.

Then, the object modeling unit 230 performs a trimming operation of the filtered modeling data, classifies the modeling data into an element without a volume and an element with a volume, and models the classified modeling data using a 3D modeling tool. Do (340).

3D object modeling is performed using a 3D modeling tool such as SketchUp, and in SketchUp, elements with a volume and an element without a volume are separately imported and three-dimensionalization work for a digital twin is performed. Hereinafter, 3D object modeling of an element according to the presence or absence of a volume will be described with reference to FIGS. 4 and 5.

FIG. 4 is a control flowchart for explaining an object modeling method according to an embodiment of the present invention, and FIG. 4 is a diagram illustrating 3D object modeling for an element having no volume.

First, an element without a volume is input to a modeling tool such as SketchUp, and the sketchup creates a surface on the element without a volume (410).

An element without volume means an element that does not have a volume, such as a terrain or a road, and the element that is the most basic for urban modeling may correspond to this. When the terrain and the road surface are generated in this way, the object modeling unit 230 groups the elements with the surface generated to form an object (420).

The elements on which the surface is formed can be grouped according to whether the terrain is the same as the ground, whether the vehicle is on the road, or whether the person is on the sidewalk, etc., and in detail, it can be grouped by various categories according to the characteristics such as whether the characteristic of the terrain is asphalt or unpaved road. .

When object formation is performed on one element, it may be determined whether there is an additional element requiring object shaping (430).

As a result of the determination, if there are additional elements requiring object shaping, elements without volume may be input to the 3D object modeling tool, grouped, and object-shaped.

On the other hand, there are no additional elements, and SketchUp performs a texture work on the created object (440).

That is, the object modeling unit 230 may perform a material mapping process of adding and supplementing materials to an element without a volume so that the digital twin looks more visually similar to the actual one.

FIG. 5 is a control flowchart illustrating an object modeling method according to another embodiment of the present invention, and FIG. 5 illustrates 3D object modeling for an element having a volume.

Similar to 410, the filtered volume element is input to a modeling tool such as SketchUp, and SketchUp creates a surface on the volumetric element (510).

Thereafter, in the sketchup, attribute data such as height and area are assigned to an element without volume to form a shape, and the shape of the element to which attribute information is assigned is modified and optimized (520).

Unlike elements without volume, elements with a sense of volume and volume need to be shaped in size and corrected in shape. The attribute data and data necessary for correction between a plurality of shaped elements are also stored in the database unit 220.

It is determined whether the optimally shaped element has its shape within a predetermined tolerance range (530).

To this end, attribute information is given, an error between the shape of the corrected element and the actual element is calculated, and it may be determined whether the error value is within an allowable error range.

As a result of the determination, if the error between the shaped element and the actual element is out of the allowable range, the process goes back to step 520 to repeat the process of modifying and optimizing the shape.

On the other hand, if the error between the shaped element and the actual element is within an allowable range, SketchUp may group the elements with volume to form an object (540).

Elements can be grouped according to their shape and function, such as buildings, traffic lights, street trees, residential complexes, and factory complexes arranged on a road, and object shaping is performed in response to attribute information.

When object formation for one element proceeds, it may be determined whether there are additional elements requiring object shaping (550).

As a result of the determination, if there is an additional element requiring object shaping, the element having a volume again may be input to the 3D object modeling tool, grouped, and object-shaped.

On the other hand, there are no additional elements, and SketchUp proceeds with a texture work that adds and supplements materials to the volumetric element so that the digital twin looks more visually similar to the actual one (560).

Referring again to FIG. 3, when 3D object modeling is performed on an element, after that, an object registration process is performed.

The object modeling unit 230 registers the object in the database unit 220 by correcting the GPS coordinates of the modeled object (350). The process for this will be described with reference to FIG. 6, which is a control flow chart for explaining the object registration method according to the present embodiment.

The element that has been objectified may be displayed on the display unit 120 of the user terminal 100, and as shown in FIG. 6, the object modeling unit 230 is the internal coordinate of the object displayed on the user terminal 100. Is extracted and converted into actual GPS coordinates (610)

The internal coordinate is one of location information for specifying an object displayed on the display unit 120, and through this, mutual positions between displayed objects can be recognized. Since the existing GIS internal coordinates are coordinates in the form of a two-dimensional plane, in order to model with three-dimensional three-dimensional information, it is necessary to identify the location and shape of an object by specifying the three-dimensional internal coordinates based on GIS-BIM.

The converted GPS coordinates are corrected through actual GPS coordinates and satellite information (620), and the object modeling unit 230 determines whether the corrected GPS coordinates exist within a preset tolerance range (630).

That is, it is possible to determine the accuracy of the correction by calculating an error range between the corrected coordinates and the actual coordinates, and determining an allowable range for this.

If the corrected GPS coordinates are out of the preset tolerance range, the GPS coordinates go through the correction process of step 620 again.

As a result of the pandas, if an error between the corrected GPS coordinates and the actual GPS coordinates exists within the allowable range, it may be determined whether or not the corrected GPS coordinates for the object are stored in the database unit 220 (640).

This is to prevent duplicate registration by checking whether an object has already been registered, and to update only new objects.

As a result of the determination, if the coordinates of the object are stored in the database unit 220, the additional registration process is omitted, and if not stored in the database unit 220, the object modeling unit 230 assigns a new ID to the object and Register at (220) (650).

The newly registered object may be transmitted to the user terminal 100 along with the ID (660), and the object ID may be stored in the user terminal 100.

In this way, elements newly converted into 3D objects may be displayed on the user terminal 100, and the user may reduce or enlarge the city modeling screen using the user manipulation unit 130, and select a specific object.

As shown in step 360 of FIG. 3, the controller 210 may transmit data linked to the selected object to the user terminal 100 in response to the object selection signal received from the user terminal 100.

The detailed data linked to the object contains at least one of atmospheric environment information, energy information, traffic information, road guidance information, population information, building maintenance cost information, building electricity consumption information, and building aging information. Can include. As described above, since detailed information on an object can be provided and utilized to a user only when necessary, it is possible to reduce the weight of city modeling and to process information quickly.

Since the city modeling system according to the present invention is a digital twin-based integrated information processing system suitable for a smart city and implementing city services, it is possible to expand, apply, and apply services in various fields. In other words, it is possible to provide an intelligent service centered on a user who wants to use the real situation in the virtual space by connecting the real space and the virtual space. For example, it is possible to visualize the flow of atmospheric environment such as fine dust and odor in the form of a layer on the digital twin model, predict the maintenance cost of a building, or calculate the predicted usage using the calculated power consumption. It can also be compared, and facility maintenance based on a dimensional object model, such as simulation of the deterioration of a building, is possible.

7 is a diagram illustrating an example of application of city modeling according to an embodiment of the present invention.

7 shows various examples of evacuation routes when a disaster occurs. In addition, through city modeling, simulations of providing pre-response systems and evacuation information in the event of a disaster situation are possible.

As described above, the present invention is a computer information processing program that automatically objectsizes a city model by inputting city information and importing it into a ruby code. It does not target only a single building, but targets the entire city through the construction of a digital twin model. To do. In addition, the present invention relates to an urban modeling system and modeling method that integrates various technologies and connects IoT sensor technology, rather than using only limited terrain or building information. It becomes possible to integrate management.

8 is a diagram illustrating a computing device according to an embodiment of the present invention. The computing device TN100 of FIG. 8 may be a device described herein (eg, a device for an urban modeling system (eg, a user terminal, a modeling server, etc.)).

In the embodiment of FIG. 8, the computing device TN100 may include at least one processor TN110, a transmission/reception device TN120, and a memory TN130. In addition, the computing device TN100 may further include a storage device TN140, an input interface device TN150, an output interface device TN160, and the like. Components included in the computing device TN100 may be connected by a bus TN170 to communicate with each other.

The processor TN110 may execute a program command stored in at least one of the memory TN130 and the storage device TN140. The processor TN110 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to an embodiment of the present invention are performed. The processor TN110 may be configured to implement procedures, functions, and methods described in connection with an embodiment of the present invention. The processor TN110 may control each component of the computing device TN100.

Each of the memory TN130 and the storage device TN140 may store various information related to an operation of the processor TN110. Each of the memory TN130 and the storage device TN140 may be configured with at least one of a volatile storage medium and a nonvolatile storage medium. For example, the memory TN130 may be composed of at least one of a read only memory (ROM) and a random access memory (RAM).

The transmission/reception device TN120 may transmit or receive a wired signal or a wireless signal. The transmission/reception device TN120 may be connected to a network to perform communication.

Meanwhile, the embodiment of the present invention is not implemented only through the apparatus and/or method described so far, but may be implemented through a program that realizes a function corresponding to the configuration of the embodiment of the present invention or a recording medium in which the program is recorded. In addition, such an implementation can be easily implemented by a person skilled in the art from the description of the above-described embodiments.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of the skilled person using the basic concept of the present invention defined in the following claims are also present. It is within the scope of the invention.

Claims (15)

In an object-based 3D city modeling system including a user terminal and a modeling server,
The user terminal;
A display unit for displaying the modeled 3D city model;
Including a user operation unit that can select, enlarge or reduce a specific object included in the 3D city model,
The modeling server,
A database unit for storing modeling data such as digital topographic maps, cadastral maps, city image data, and IOT information;
An object that classifies the modeling data into an element without a volume and an element with a volume, performs 3D object modeling using a 3D modeling tool, and registers an object by correcting GPS coordinates of the modeled object A modeling unit;
And a control unit for transmitting data linked to a selected object to the user terminal in response to an object selection signal received from the user's terminal,
The 3D modeling tool includes sketchup,
The object modeling unit uses the sketch-up,
Creating a surface on the volumetric element,
Attribute data such as height and area are assigned to the element with the volume to form,
If the shape of the element with the volume is within a preset tolerance range, the elements with the volume are grouped to form an object,
Characterized in that performing a texture operation on the created object
Urban modeling system. The method of claim 1,
The object modeling unit,
Classify the modeling data into layers and elements and process them into basic data that can be used for modeling,
Filtering to select data necessary for the 3D object modeling among the basic data
Urban modeling system. The method of claim 1,
The 3D modeling tool includes sketchup,
The object modeling unit uses the sketch-up,
Creating a surface on the volumeless element,
The elements on which the surface was created are grouped to form an object,
Characterized in that performing a texture operation on the created object
Urban modeling system. delete The method of claim 1,
The object modeling unit,
Extracting the internal coordinates of the object displayed on the display unit,
Convert the internal coordinates into GPS coordinates,
Correcting the converted GPS, determining whether the corrected GPS coordinates exist within a preset tolerance range,
If the corrected GPS coordinates are within a preset tolerance, it is determined whether the coordinates for the object are stored in the database unit,
If the coordinates of the object are not stored in the database unit, a new ID is assigned to the object and registered in the database unit, and the ID of the object is transmitted to the user terminal.
Urban modeling system. The method of claim 1,
The data linked to the object includes at least one of atmospheric environment information, energy information, traffic information, road guidance information, population information, information on the maintenance cost of the building, information on the power consumption of the building, and information on the aging Characterized in that it comprises
Urban modeling system. In the city modeling method of an object-based 3D city modeling system,
Collecting modeling data such as digital topographic map, cadastral map, city image data, and IOT information;
Classifying the modeling data into an element without a volume and an element with a volume, and performing 3D object modeling on the classified modeling data using a 3D modeling tool;
Registering an object by correcting GPS coordinates of the modeled object;
In response to an object selection signal received from an external user terminal, transmitting data linked to the selected object to the user terminal,
The step of performing the 3D object modeling
Creating a surface on the volumetric element,
Adding attribute data such as height and area to the element having the volume to form a shape,
If the shape of the element with the volume is within a preset tolerance range, grouping the elements with the volume to form an object,
It characterized in that it comprises the step of performing a texture operation on the created object
Urban modeling method. The method of claim 7,
After the step of collecting the data,
Classifying the modeling data into layers and elements and processing them into basic data that can be used for modeling;
And performing filtering for selecting data necessary for modeling the 3D object from among the basic data.
Urban modeling method. The method of claim 7,
The step of performing the 3D object modeling,
Creating a surface on the volumeless element,
Grouping the surface-generated elements to form an object,
It characterized in that it comprises the step of performing a texture operation on the created object
Urban modeling method. delete The method of claim 7,
The step of registering the object,
Extracting internal coordinates of an object displayed on the user terminal and converting the internal coordinates to GPS coordinates,
Correcting the converted GPS and determining whether the corrected GPS coordinates exist within a preset tolerance range,
If the corrected GPS coordinates exist within a preset tolerance, determining whether the coordinates for the object are stored in a pre-installed database unit,
If the coordinates of the object are not stored in the database unit, assigning a new ID to the object, registering the object in the database unit, and transmitting the ID of the object to the user terminal.
Urban modeling method. In an object-based 3D city modeling server communicating with a user terminal,
A database unit storing modeling data such as digital topographic maps, cadastral maps, city image data, and IOT information;
An object that classifies the modeling data into an element without a volume and an element with a volume, performs 3D object modeling using a 3D modeling tool, and registers an object by correcting GPS coordinates of the modeled object A modeling unit;
And a control unit for transmitting data linked to the selected object to the user terminal in response to an object selection signal received from the user's terminal,
The 3D modeling tool includes sketchup,
The object modeling unit uses the sketch-up,
Creating a surface on the volumetric element,
Attribute data such as height and area are assigned to the element with the volume to form,
If the shape of the element with the volume is within a preset tolerance range, the elements with the volume are grouped to form an object,
Characterized in that performing a texture operation on the created object
City modeling server. The method of claim 12,
The 3D modeling tool includes sketchup,
The object modeling unit uses the sketch-up,
Creating a surface on the volumeless element,
The elements on which the surface was created are grouped to form an object,
Characterized in that performing a texture operation on the created object
City modeling server. delete The method of claim 12,
The object modeling unit,
Extracting the internal coordinates of the object displayed on the user terminal,
Convert the internal coordinates into GPS coordinates,
Correcting the converted GPS, determining whether the corrected GPS coordinates exist within a preset tolerance range,
If the corrected GPS coordinates are within a preset tolerance, it is determined whether the coordinates for the object are stored in the database unit,
If the coordinates of the object are not stored in the database unit, a new ID is assigned to the object and registered in the database unit, and the ID of the object is transmitted to the user terminal.
City modeling server.

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