• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.417-420
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• 2006

Recently we could generation of 3-D simulation image by use of various image contents, so I tried advanced methods very easily leads to the location on the GIS environments. Its used basically air photos and satellite sensor images for them. For the generate 3-D spatial be suitable to matching map coordinates using elevation data from digital topographic files, and matching to 3D spatial image contents through perspectives view condition composed to move according to fixed roads until arrive to location. Through this new system which tourists are able to simulate the interest paths or locations and to visit the cultural inheritance was proposed by combining various spatial data with the multimedia contents. This system provides people with guidance to locate the cultural assets in the Web environments. The developed system which is more convenient to provide tourists with the information and they are able to access automatically to location easily. In the future, the visitors are able to use easily the 3d image contents on the Internet or from the public tour information desk by using the simulation images.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.1D
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• pp.157-167
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• 2006

During the first and second NGIS projects by the Korean government, The first one (1995~2000) was limited on constructing geographic information and the second (2001~2005) was focused on circulation and practical use of geoinformation from the result of the first project. In the latter half of 2nd NGIS project, However, the geographic information from the NGIS projects have not been renewed even though there were significant geographical changes. The accurate renewal of geoinformation is a matter of great importance to the next generation industry (e.g. LBS, Ubiquitous, Telematics). In this respect, it is time to update the geographic information in the latter half of the second NGIS project. Therefore, It is not only important to build an accurate geoinformation but also rapid and correct renewal of the geoinformation. NGII (National Geographic Information Institute) has been studying for improvement of digital map that was constructed by the result of the 1st NGIS project. Through the construction of clean digital map, NGII constructed Framework Data to three kinds of formats (NGI, NDA, NRL). Framework Data was contained to other database, and provided the reference system of location or contents for combining geoinformation. Framework Data is consist of Data Set, Data Model and UFID (Unique Feature Identifier). It will be achieved as national infrastructure data. This paper attempts to explore a method of the update to practical framework data with realtime geoinformation on feature's creation, modification and destruction managed by 'Feature management agency' using UFID's process. Furthermore, it suggests a method which can provide important data in order to plan the Framework update with the land change ratio.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.302-307
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• 2017

본 연구에서 퇴사량조사 실적 및 유량-유사량 관측 자료, 상 하류 수위-유량 자료를 보유하고 있는 B 저수지를 대상으로 3차원 수치모형을 이용하여 저수지 퇴사분포를 분석해 보았다. 또한 수치모형의 검증을 위하여 저수지내 6개 지점에 대한 시추 샘플링을 통해 퇴적토의 깊이를 측정하였다. 퇴적토 샘플링시 시료의 교란을 방지하기 위하여 동일지점에서 2회 샘플링 작업을 수행하였다. 샘플링 시료는 원지반과 퇴적지반의 구분을 위하여 시료분석 이전에 각 단면별 깊이를 측정하였으며, 시료는 각 단면별로 물리적 특성시험을 통해 압밀도를 측정하여 퇴적토의 깊이를 산정하고 수치모형시 검증 자료로 사용하였다. 본 연구에서는 3차원 수리해석과 함께 유사의 이송, 침식, 퇴적현상을 연동하여 모의 가능한 Delft3D 모형을 이용하여 B 저수지에 대한 유사 이송모의를 수행하였다. 모의 결과 저수지의 하폭이 넓어지는 지형 및 만곡부 인근에서 퇴적이 진행되는 결과를 보였으며, 퇴적토 시료와 비교한 결과 퇴적토 깊이는 일부 차이가 있었으나, 퇴적분포 양상은 유사한 결과를 보였다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.26 no.3D
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• pp.511-517
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• 2006

In this paper, we studied the techniques to analyze the flying safety area focused on the air base rules for military that has been the criteria of the altitude restrictions around the airfield for both civilian and military purposes in Korea. We wanted to present the effective method to analyze the restricted area and to help solving problems that could result recently from the altitude restrictions around the airfield at the beginning of the development projects. To do this we proposed the methods to effectively generate the model of the flying safety area in accordance with the air base rules using 3D GIS techniques and to automatically identify the obstructions caused by the natural and man-made features in those areas. To apply the proposed methods actually to the airfield chosen for the study area, we presented the approaches to generate geospatial informations based on the commercial digital maps and satellite imagery and by generating the flying safety area model, identifying the obstructions, and visualizing the integrated model for the flying safety area analysis we showed the practical usability of the proposed techniques.

• Proceedings of the Korea Water Resources Association Conference
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• 2016.05a
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• pp.394-398
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• 2016

Numerical analysis was conducted using Delft3D developed by Deltares in Netherlands to predict long-term river bed changes in Saemangeum Area. Tidal flow, discharge through the drainage gates and river bed changes in numerical model was verified by comparing to the results of field observation and hydraulic experiments. We calculated long-term river bed changes in Saemangeum area for 10 years from 2031 to 2040 after completion of development in Saemangeum. It is shown that 70 cm and 139 cm of accumulation occur in estuaries of Dongjin River and Mankyong River, respectively. Variation of flood level was also investigated considering long-term river bed changes. There was no change in estuary of Dongjin River but maximum flood level in estuary of Mankyong River increased 81 cm.

• Journal of the Korean Institute of Traditional Landscape Architecture
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• v.31 no.3
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• pp.95-105
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• 2013

This study on circular identifying purposes was performed of Youngbeokji space located in Seongnagwon(Scenic Sites No.35). Through the data acquisition of 3D high precision, such as the surrounding terrain of the Youngbeokji. The results of this study is summarized like the following. First, the purpose of the stone structures and structure within the Youngbeokji search is an important clue to find that earlier era will be a prototype. 3D scan method of enforcement is searching the whole structure, including the surrounding terrain and having the easy way. Second, the measurement results are as follows. Department of bedrock surveyed from South to North was measured by 7,665mm. From East to West was measured at 7,326mm. The size of the stone structures, $1,665mm{\times}1,721mm$ in the form of a square. Its interior has a diameter of 1, 664mm of hemispherical form. In the lower portion of the rock masses in the South to the North, has fallen out of the $1,006mm{\times}328mm$ scale traces were discovered. Third, the Youngbeokji recorded in the internal terrain Multiresolution approach. After working with the scanner and scan using the scan data, broadband, to merge. Polygon Data conversion to process was conducted and mash as fine scan data are converted to process data. High resolution photos obtained through the creation of 3D terrain data overlap and the final result. Fourthly, as a result of this action, stone structure West of the waterway back outgoing times oil was confirmed. Bangjiwondo is estimated to be seokji of structure hydroponic facility confirmed will artificially carved in the bedrock. As a result of this and the previous situation of the 1960s could compare data was created. This study provides 3D precision ordnance through the acquisition of the data. Excavations at the circle was able to preserve in perpetuity as digital data. In the future, this data is welcome to take a wide variety of professionals. This is the purpose of this is to establish foundations and conservation management measures will be used. In addition, The new ease of how future research and 3D scan unveiled in the garden has been used in the study expect.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.443-446
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• 2002

인터넷과 컴퓨터 기술이 발달함에 따라 가상공간에 대한 관심은 커져가고 있다. 그러나 가상공간을 생성하는 작업은 많은 시간과 노력이 필요하다. 그래서 가상공간 모델링에 관련된 연구들이 많이 이루어지고 있다. 본 논문에서는 2차원 CAD 데이터로부터 가상공간을 모델링하는 방법을 제시한다. CAD 파일에서 2차원 지형정보를 추출하여 웹에서 볼 수 있는 3차원 가상공간을 생성한다. 가상공간생성 과정은 전처리, 데이터 추출, 모델생성, 렌더링으로 이루어진다. 전처리는 CAD 파일에서 도로경계선을 분리하며 데이터 추출은 등고선, 도로경계선, 건물 정보를 CAD 파일로부터 추출하는 과정이다. 모델 생성은 추출한 지형정보들을 이용해서 3차원 공간모형 데이터를 생성하는 과정이다. 본 논문에서 제시한 방법은 실세계에 근접한 가상공간을 생성하며 가상공간을 생성하는데 드는 시간과 노력을 줄일 수 있다.

• Proceedings of the International Union of Geodesy And Geophysics Korea Journal of Geophysical Research Conference
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• 2003.05a
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• pp.16-16
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• 2003

본 연구는 ILP(International Lithosphere Project) Task Group II-4가 진행하고 있는 상부맨틀에 대한 3차원 구조도 작성 연구의 일환으로 수행되어졌으며 구조도 작성을 위한 데이터 베이스의 구조는 task group의 표준안을 따랐다. 기존 문헌과 기존의 데이터 베이스를 통해서 획득된 자료를 이용해 동해와 그 주변을 대상으로 하는 지역의 ($32-45^{\circ}$E, $122-148^{\circ}$N) 상부 670km까지의 3차원 구조도 작성을 위한 초기 모델을 구축하였으며, 이 절차를 최대한 자동화하는 프로그램을 포트란을 이용해 만들어보았다. 연구 지역에 대한 곡율을 계산하기 위해 표준타원체 모델인 WGS84과 geoid undulation 모델인 EGM96을 사용했으며 지형 고도 자료는 GTOPO30, GLOBE 1.0, 그리고 Smith and Sandwell 데이터베이스를 사용하여 지구 중심으로부터 지표까지의 거리를 구하였다. 연구지역은 $0.25^{\circ}$간격으로 나누었으며 총 5777개의 격자점을 정의하였으며 각각의 격자점에 1차원 수직구조를 부여함으로써 3차원 모델을 구축하였다. 그리고 지형적으로나 지질학적으로 유사한 지역을 하나의 구역으로 정의하고 동일한 수직구조를 부여함으로써 모든 격자점에 1차원 수직구조를 정의하지 않도록 하였다. 본 연구에서는 지표 지질은 모델에 고려하지 않았지만 지형학적으로 의미가 있는 분지나 수평적으로 불균질성이 뚜렷한 지역을 중심으로 연구 지역의 리젼을 정의하였다. 중요 리젼에 대한 지각구조에 대해서는 기존의 문헌을 통해 모델치를 정의하였으며 지각 하부부터 상부 670km에 대한 부분은 Task Group에서 제시한 표준 모델을 이용했다. 모델을 정의하기 위해 주어진 격자점에 대한 지구 중심으로부터 지오이드까지의 거리, 지오이드로부터 지표까지의 거리를 정의해주었으며, 각 격자점의 수직구조를 정의하기 위해 깊이에 따른 각 매질의 밀도, P파의 속도, S파의 속도, P파에 대한 Q값, S파에 대한 Q값을 정의 해주었다. S파의 속도를 구하기 위해서 지구 내부 물질을 포아송 매질이라는 가정 하에, 관계식을 $Vp{\;}={\;}SQRT(3){\;}{\times}{\;}Vs$ 이용하였다. 획득한 모델치들을 이용해 동해와 동해 인근 지역에 대한 초기모델을 구축하였다.

• Geophysics and Geophysical Exploration
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• v.23 no.1
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• pp.22-37
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• 2020

We analyze the comprehensive three-dimensional (3D) magnetic structure characteristics from the seafloor to the deep layer of the Tofua Arc (TA) 12 seamount in the Tonga Arc, Southwestern Pacific, using bathymetric and geomagnetic data, and magnetization vector inversion (MVI) results. The seafloor features surrounding TA 12 highlight a NW-SE-oriented elliptical caldera at the summit of the seamount, two small cones in the depressed area. A large-scale sea valley is present on the western flank of the seamount, extending from these caldera cones to the southwestern base of the seamount. TA 12 seamount exhibits a low magnetic anomaly in the caldera depression, whereas a high magnetic anomaly is observed surrounding the low magnetic anomaly across the caldera summit. It is therefore presumed that there may be a strong magnetic material distribution or magma intrusion in the caldera. The 3D MVI results show that the high anomaly zones are mainly present in the surrounding slopes of the seamount from the seafloor to the -3,000 m (below the seafloor) level, with the magnetic susceptibility intensity increasing as the seafloor level increases at the caldera depression. However, small high anomaly zones are present across the study area near the seafloor level. Therefore, we expect that the magma ascent in TA 12 seamount migrated from the flanks to the depression area. Furthermore, we assume that the complex magnetic distribution near the seafloor is due to the remnant magnetization.

• Journal of Korean Society for Geospatial Information Science
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• v.13 no.4 s.34
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• pp.39-46
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• 2005

This paper use virtual running after possible traffic capacity application for optimal route location. General road is designed the design after we examine an alternate adequacy investigation and an execution design sufficiently. Various road user's requirement must be reflected from the beginning. But it is difficult to contain the various suitable design criteria because we consider the existing 2-dimension element. First of all, this study chose optimal route, used traffic assignment and 3D simulation. Then selected optimal route through the consistent road construction by analyzing road driving simulation of 3-dimension data and the urban landscape. possible traffic capacity and virtual running will be able to do the urban landscape analysis harmonizing with the environment; equally, it could be objectively solve the problem of a civil appeal.