• 환경영향평가
• /
• 제15권4호
• /
• pp.271-277
• /
• 2006

In this study, we investigated the applicable plan of GIS on the environmental impact assessment of 60 Hz Powerline. So we assessed distance data based on calculations by use of 2D and 3D Geographical information systems(GIS) and distance data based on measurements on 1: 5000 maps accord with on site distance measurements to use input data for calculating magnetic field. One hundred eight of the on site measured addresses were selected from residences. The data were achieved by measuring the distance between residence and power line on maps with scales of 1: 5000. The digital map was obtained from National Geographic Information Institute with scales of 1: 5000, and we made 2D and 3D map. Correlation analyses were performed for statistical analyses. For the 3D GIS versus on site comparison of different exposure categories, 70 of 108 measurements were assigned to the correct category. Similarly for 2D GIS versus on site comparison, 71 of 108 were correctly categorized. When comparing map measurement with on site measurement, 62 of 108 were correctly categorized. When the correlation analysis was performed, best correlation was found between 3D GIS and on site measurements with r = 0.84947 (p<0.0001). The correlation between map and on site measurement yielded an r of 0.76517 (p<0.0001). Since the GIS measurements and map measurement were made from the center point in the building and the on site measurements had to be made from the closest wall on the building, this might introduce and additional error in urban areas. The difference between 2D and 3D calculations were resulted from the height of buildings.

• 한국항행학회논문지
• /
• 제5권2호
• /
• pp.123-133
• /
• 2001

기존의 위성 영상이나 지도 이미지를 이용한 지형의 3차원 시각화 방법은 전처리 과정이 복잡하고 3차원 지형의 생성에 필요한 데이타가 방대하다는 단점이 있다. 따라서 본 논문에서는 수치지도를 이용하여 등고선 정보를 획득하고 이를 바탕으로 3차원 지형을 자동으로 생성할 수 있는 지형의 3차원 시각화 방법을 제시하고자 한다. 또한 지형 데이타의 3차원 시각화를 위해 반드시 처리해야 하는 세가지 문제인 등고선 대응 문제, 타일링 문제, 지맥 문제를 효율적으로 처리할 수 있는 방법을 소개한다. 이를 위해 가상 등고선의 개념을 정의하고 왜곡된 등고선을 대응되는 등고선과 유사한 모양이 되도록 확장하여 3차원 표면을 생성할 수 있도록 한다. 이 방법은 3차원 지형을 정확하고 세밀하게 표현할 수 있는 장점이 있다.

• ETRI Journal
• /
• 제40권6호
• /
• pp.788-793
• /
• 2018

3D reconstruction of urban architecture, land, and roads is an important part of building a "digital city." Unmanned aerial vehicles (UAVs) are gradually replacing other platforms, such as satellites and aircraft, in geographical image collection; the reason for this is not only lower cost and higher efficiency, but also higher data accuracy and a larger amount of obtained information. Recent 3D reconstruction algorithms have a high degree of automation, but their computation time is long and the reconstruction models may have many voids. This paper decomposes the object into multiple regional parallel reconstructions using the clustering principle, to reduce the computation time and improve the model quality. It is proposed to detect the planar area under low resolution, and then reduce the number of point clouds in the complex area.

• 한국측량학회지
• /
• 제29권6호
• /
• pp.569-576
• /
• 2011

최근 3차원 공간정보 수요의 증가로 인해 고정밀의 3차원 공간정보 구축이 활성화되고 있다. 이렇게 구축되고 있는 3차원 공간정보를 활용하여 건설 토목분야에서는 타 분야와의 융합을 통해 그 생산성을 높이기 위해 다양한 연구가 진행 중이다. 이러한 추세로 건설 및 토목분야에서의 BIM(Building Information Modeling) 기술이 빠르게 적용되고 있다. 특히, 계획-설계-시공-유지보수와 같은 생애주기를 지닌 건설 토목 분야에서는 각 단계별 특징에 맞도록 BIM 활용 방법 및 방안 등이 제시되고 있다. 따라서 본 논문에서는 기존의 경험적, 통계적 데이터베이스와 2차원 정보를 바탕으로 시행된 토목공사 프로세스에서 벗어나 3차원 공간정보와 BIM 기술을 연계하여 합리적이고 최적화 가능한 프로젝트를 시뮬레이션 하기 위함에 있다. 이를 위하여 항공사진과 항공라이다를 이용하여 연구지역에 대한 3차원 지형데이터를 구축하였으며, 구축된 지형데이터와 교량 구조물 설계자료와의 통합 BIM 모델을 구축하여 실험지역에 적용함으로써 그 활용성을 사례를 통해 분석하였다.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.1371-1373
• /
• 2003

The importance of Fundamental Geographical Information Framework for Digital City (FGFDC) is analysed, it provides all city agencies and units with uniform geographic references. Six kind of data are chosen as the core data sets of a FGDC, a web-based distributed mechanism is constructed to promote data sharing among different agencies. Elementary functional requirements of FGDC are analyzed, so that it can serve as a common distributed urban GIS. A practical FGFDC is developed for Yangzhou Development Administrative Region, and an 3D visualization system is developed within this framework.

• 한국BIM학회 논문집
• /
• 제6권4호
• /
• pp.27-34
• /
• 2016

A Building Information Model (BIM) is an attempt to simulate the process of building structures in a three-dimensional (3D) digital space. While the technology is usually applied to structured buildings, bridges, and underground facilities, it is rarely applied to an unstructured environment of earthwork operations. If a BIM is used for earthworks, the 3D simulation can be used for construction equipment guidance and earthwork management. This paper presents a real-time, 3D earthwork BIM that provides a 3D graphical simulation of excavators in conjunction with geographic modeling. Developing a real-time, 3D earthwork BIM requires handling a variety of factors, such as geographical information and vehicular movement. This paper mainly focuses on the management of these attributes and provides a database design for storing and retrieving data. In an example application, a prototype of the 3D earthwork BIM is presented to understand what it would provide when used during earthwork operations at a construction site.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2003년도 추계학술대회 및 정기총회
• /
• pp.155-158
• /
• 2003

물류센터의 위치선정문제 및 차량운송계획문제 등 물류시스템계획문제에서 거리산정문제를 매우 중요한 문제이며 물류비용의 주요 요인이 되고있다. 지금까지의 거리산정문제는 기하학적거리 및 지역도로와 교통조건을 고려한 일반거리, lp-Distance, 등의 방법들을 활용하고 있다. 최근에는 GIS(Geographical Information System)기반에서의 2차원 평면상의 GIS거리(2-D 거리)를 사용하는 방법을 많이 활용하고 있다. 이러한 방법은 지형적인 여건과 고도차이에 따른 실제거리와는 많은 차이가 있다. 본 연구에서는 이러한 2D기반의 디지털 맵을 3-D 기반의 디지털 맵으로의 변환을 통해 2D GIS 거리산정 방법을 확장하여 3-D기반의 GIS거리 산정 방법을 개발하였다. 이러한 3가지의 거리산정방법; lp-Distance, 2-D 기반의 GIS거리산정 방법 및 3-D기반의 GIS거리산정 방법을 부산지역의 차량운송계획문제(VRP)에 응용하고 그 결과를 비교 분석하였다.

• Journal of Multimedia Information System
• /
• 제6권1호
• /
• pp.23-30
• /
• 2019

A communications profile is a system that acquires information from communication links to an ambulance or other vehicle moving on a road and compiles a database based on this information. The equipment (six sets of HDTVs, fish-eye camera, satellite antenna with tracking system, and receiving power from the satellite beacon of the N-star) mounted on the roof of the vehicle, image data were obtained at Yokohama Japan. From these data, the polygon of the building was actually produced and has arranged on the map of the Geographical Survey Institute of a 50 m-mesh. The optical study (relationship between visibility rate and elevation angle) were performed on actual data taken by fish-eye lens, and simulated data by 3D-Map with polygons. There was no big difference. This 3D map system then predicts the communication links that will be available at a given location. For line-of-sight communication, optical analysis allows approximation if the frequency is sufficiently high. For non-line-of-sight communication, previously obtained electric power data can be used as reference information for approximation in certain cases when combined with predicted values calculated based on a 3D map. 3D maps are more effective than 2D maps for landing emergency medical helicopters on public roadways in the event of a disaster. Using advanced imaging technologies, we have produced a semi-automatic creation of a high-precision 3D map at Yokohama Yamashita Park and vicinity and assessed its effectiveness on telecommunications and ambulatory merits.

• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2002년도 ITC-CSCC -2
• /
• pp.848-851
• /
• 2002

Recently, there are lots of concerning on the integration of robot and virtual reality with the trends of the research of intelligent robot and mined reality. In this paper, a 3D GUI system is proposed based on Internet for remote controlling and monitoring of agent robot working for itself. The proposed system is consists of a manager ordering a new position and displaying the motion of robot, an agent robot moving to the destination according to the indication, a positioning module detecting the current position of robot, and a geographical information module. A user can order the robot agent move to a new position in a virtual space and watch the real images captured from the real sites of the robot. Then, the agent robot moves to the position automatically with avoiding collision by using range finding and a path detection algorithm. We demonstrate the proposed 3D GUI system is supporting a more convenient remote control means far the robots.

• 한국측량학회지
• /
• 제28권3호
• /
• pp.385-392
• /
• 2010

A LiDAR technique has the merits that survey engineers can get a large number of measurements with high precision quickly. Aerial photos and satellite sensor images are used for generating 3D spatial images which are matched with the map coordinates and elevation data from digital topographic files. Also, those images are used for matching with 3D spatial image contents through perspective view condition composed along to the designated roads until arrival the corresponding location. Recently, 3D aviation image could be generated by various digital data. The advanced geographical methods for guidance of the destination road are experimented under the GIS environments. More information and access designated are guided by the multimedia contents on internet or from the public tour information desk using the simulation images. The height data based on LiDAR is transformed into DEM, and the real time unification of the vector via digital image mapping and raster via extract evaluation are transformed to trace the generated model of 3-dimensional downtown building along to the long distance for 3D tract model generation.