• Proceedings of the KSRS Conference
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• 2003.11a
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• pp.144-146
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• 2003

Techniques for rock slope management and assessment must be developed for the prevention and mitigation of rock fall hazards. To enable this, the rock discontinuity such as fault and joint data must be surveyed, analysed and managed. For this, the discontinuities were detected by automatic and semi-automatic method using DEM and ortho-rectified image of rock slope and the rock slope analysis and management system was developed using GIS. Using the system, slope locations and discontinuities data were constructed to spatial database. The system is consist of ‘Data Management’, ‘Rock Slope DB’, ‘Basic Information’, ‘Image Processing’, ‘Image Analys ing’, ‘Edit’, ‘View’, ‘Theme’, ‘Graphic’, ‘Window’ and ‘Help’. The system was developed using avenue of ArcView 3.2.

• Journal of the Korean Association of Geographic Information Studies
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• v.8 no.4
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• pp.155-164
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• 2005

The coast has been known as very vulnerable area. This area has nature disasters such as typhoon, tidal wave, flood and storm almost every year. In this study, coast vulnerable area information management system was developed to manage the coastal facilities and vulnerable area through Web GIS. This system is able to visualize the damage area and support the official work related to coast as efficient DSS(Decision Supporting System). Moreover, the foundation for domestic coast information management is expected by acquiring less cost and time. For this, GIS DB was first constructed by acquiring damage factor data such as typhoon, tidal wave, flood and storm. Then GIS analysis methods and high resolution satellite images are used to possibly present the results of retrieve as table, map, graph, inundation simulation in real time.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.946-951
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• 2004

ITIS is applied to the several tunnel construction sites in Korea. Tunnel construction properties which are acquired from these sites are transferred to information management server(SQL 2000 server)by client application program in real time. Access permission to DB server depends on the user's roles. Some functions which cannot be embodied in SQL Server are serviced through XML and GMS server is used for spatial data based on GIS part. This system is supposed to give engineers the advantages which are not only easy handling of the program and computerized documentation on every information during construction but also analyzing the acquired data in order to predict the structure of ground and rock mass to be excavated later and show the guideline of construction. Neung-Dong tunnel and Mu-Gua express way tunnel are now under construction and with this system they have 3D visualized map of the geology and tunnel geometry and accumulate database of construction information such as tunnel face mapping results, special notes and pictures of construction and 3D monitoring data, all matters on the stability of rock bolts and shotcrete, and so on. Ground settlement prediction program included in ITIS, based on the artificial neural network(ANN) and supported by GIS technology is applying to the subway tunnel. This prediction tool can make it possible to visualize the ground settlement according to the excavation procedures by contouring the calculated result on 3D GIS map and to assess the damage of buildings in the vicinity of construction site caused by ground settlement.

• Ecology and Resilient Infrastructure
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• v.8 no.4
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• pp.266-272
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• 2021

Water friendly space refers to a place designated to plan and manage spaces for residents Water friendly activities. Efficient management of river Water friendly parks requires automated GIS data and DB construction of the water friendly facilities. Object-based classification using drone images or aerial images is attracting attention as an efficient means to acquire 3D spatial information in the country. To remove the miscellaneous image included in the extracted outline, a linear simplification of the outline is required, and it is difficult to apply manually, so various automation methods have been developed to overcome this, and among them, the most widely studied and utilized is the linear simplification method. In this study, the suitability of linear simplification algorithms such as Douglas-Peucker, Visvalingam-Whyatt, and Bend-simplify algorithms for the geometric shape of hydrophilic facilities was determined.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.6
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• pp.10-17
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• 2020

Recently, the liquefaction phenomenon was first discovered in Korea due to a magnitude 5.4 earthquake that occurred in Pohang, Gyeonsangbuk-do. When liquefaction occurs, some of the water and sand are ejected to the ground, producing a space, which leads to various dangerous situations, such as ground subsidence, building collapse, and sinkhole generation. Recently, the necessity of producing a liquefaction risk map in Korea has increased to grasp potential liquefaction areas in advance. Therefore, this study examined the drilling information from the national geotechnical information DB center at the Ministry of Land, Infrastructure, and Transport to produce a liquefaction risk map, and developed a module to implement functions for basic data modeling and 3D analysis based on drilling information database extraction and information. Through this study, effective interlocking technology of the integrated database of national land information was obtained, and three-dimensional information was generated for each stage of liquefaction risk analysis, such as soil resistance value and a liquefaction risk map. In the future, the technology developed in this study can be used as a comprehensive decision support technology for establishing a foundation for building 3D liquefaction information and for establishing a response system of liquefaction.

• Proceedings of the KSRS Conference
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• v.1
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• pp.166-169
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• 2006

Our country's coast is vulnerable area to natural disaster which the repetitive damages occur every year including a loss of lives, the damage of facilities and erosion mostly except for the east coast because of a typhoon, tidal waves, sea water overflowing by topographic structure of low-lying gentle slope and shallow sea. However, as for prevention of natural disaster occurring every year, the situation is that it's centered on the restorationcentered measures and the general disaster prevention research to minimize damages at the time of disaster occurrence is insufficient. This study intendedlop t to devehe techniques possible for real time sampling of damage prediction areas on Web in order to support decision making for damage prevention and establishment of disaster prevention policy. For this, the thematic map was produced related to disaster based on high-resolution satellite picture, and the environmental DB similar to real world was constructed through topographic construction of three-dimension integrating the parts of land and the sea. In addition, the system was developed possible for the expression of damageable regions by real time grasp of dangerous regions at the time of disaster occurrence through over flowing simulation of three-dimension, and it's intended to prepare a basis to minimize damages to disaster situations through it.

• Proceedings of the Korea Water Resources Association Conference
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• 2017.05a
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• pp.425-425
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• 2017

최근 기후변화의 영향으로 태풍과 국지성 집중호우가 빈번하게 발생하면서 인명 및 재산피해가 증가하고 있다. 이러한 자연재해를 줄이기 위하여 국가적 차원에서 피해예측 및 피해규모를 정확하게 산정하는 시스템 구축이 필요한 시점이다. 해외 주요국에서는 풍수해 재해통계 DB를 구축하고, 이를 피해예측시스템에 적용하여 피해규모를 산정함으로써 풍수해 재난관리에 활용하고 있다. 그러나 국내의 경우, 재해정보 피해통계가 공공시설에 한정되어 있거나 단순 복구비의 직접관리 수준에 그치고 있는 등 피해예측기술 및 시스템 개발 수준은 초기단계에 머물고 있다. 따라서 재해정보 기본통계를 정비하고 재난대응 단계별 의사결정 지원에 활용할 수 있는 풍수해 피해예측 및 피해액 산정 시스템을 구축할 필요가 있다. 본 연구에서는 풍수해피해예측시스템 구축을 위한 핵심 기술요소 도출하고자 한다. 이를 위하여 사전단계인 재해정보 기본통계 DB구축 방안을 검토하여 재해연보 개선안을 제시하였다. 먼저, 피해예측시스템 구축에 필요한 필수 DB를 파악하고 기존 재해연보의 활용성을 검토하였다. 검토 결과를 바탕으로 재해연보의 문제점을 파악하고 피해예측시스템에 적용이 가능한 기초 DB를 구축하기 위하여 재해연보의 개선방안을 도출하였다. 다음으로 미국에서 개발한 HAZUS-MH 시스템의 피해예측 관련 기술정보를 분류하고, 국내에서 개발 중인 피해예측시스템과 비교분석하여 핵심 기술요소를 도출하였다. 본 연구의 결과는 다음과 같다. 첫째, 풍수해 피해예측시스템의 핵심요소로서 세분화된 재해통계 DB의 구축이 필수적이다. 재해연보를 기초 DB로서 활용하기 위하여 재해항목 구체화 및 자료형태 다양화 등 재해연보의 개선이 시급하다. 둘째, 피해예측시스템 개발을 위한 핵심기술 요소는 (1)함수(모형)의 개발, (2)지리정보시스템(GIS)과의 연계, (3)피해예측시스템 구축 및 모형분석을 위한 컴퓨팅기술, (4)실시간 관측기술 및 강우량 사전예측 등으로 도출이 되었다. 이와 같이 도출한 핵심 기술요소를 바탕으로 국가 R&D 및 재난안전분야의 기술개발을 추진하여야 한다.

• International Journal of Highway Engineering
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• v.13 no.3
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• pp.111-119
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• 2011

The noise prediction model, KRON-2006, in South Korea has been developed for obtaining the average noise level. The model is based on an outdoor sound propagation method based on ISO9613 and ASJ Model-1998 and supports the analysis of the linear noise source, such as highway, for obtaining Leq. Because of that, the model can't obtain Lmax, Lmin from the time series noise profile based on traffic at every moment. In order to address this problem, the real time noise prediction model based on traffic simulation using GIS model and algorithm is proposed. It can predict the vehicle point noise level based on vehicle type, speed generated from traffic simulation by using headway and obtain Lmax, Lmin as integrating the noise profile generated from it at every moment. An evalution of the noise prediciton model using field measurements finds good agreement between predicted and measured noise levels at 1m, 8m, 15m from curb of the near side lane.

• Korea journal of population studies
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• v.32 no.3
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• pp.1-20
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• 2009

본 연구는 지리정보시스템(GIS)과 지리적 가중 회귀(GWR)를 이용하여 건강 관련 삶의 질(HRQoL)의 사회인구학적 상관요인에 대한 공간분석을 시도한다. 관찰의 독립성과 오차의 동분산성을 가정하는 전통적 회귀분석과 달리, 지리적 가중 회귀분석은 속성정보뿐만 아니라 공간정보를 활용하는 공간분석 기법이다. 분석모형은 건강 관련 삶의 질을 종합적으로 측정하는 EQ-5D를 종속변수로 하고 지역의 사회인구학적 특성인 노령인구비율, 조이혼율, 병상수, 재정자주도를 독립변수로 하여 구성하였다. 종속변수는 질병관리본부에서 실시한 <지역사회건강조사>의 자료를 이용하였고, 독립변수는 통계청 온라인 DB에 수록된 지역별 자료를 이용하였다. 모형을 추정해 본 결과 전반적으로 사회적 특성보다는 노령인구비율이나 조이혼율과 같은 인구학적 특성이 건강 관련 삶의 질에 더 많은 영향을 미치는 것으로 나타났다. 공간적 변이를 고려하는 지역모형은 전역모형에서 드러나지 않았던 중요한 유형을 보여주는데, 노령인구비율 변수와 조이혼율 변수의 지역별 추정치를 지도상으로 살펴본 결과 변수들의 효과가 공간적 위치에 따라 차이를 보인다는 점이 확인되었다. 분석 결과는 또한 지리적 가중 회귀분석이 전통적 회귀분석에 비해 공간적 자기상관의 문제를 극복하고 모형의 부합도를 증가시킨다는 것을 보여준다.

• Korean Journal of Remote Sensing
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• v.36 no.5_4
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• pp.1195-1207
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• 2020

With the development of GeoWeb technology, 2D/3D spatial information services through the web are also has been used increasingly in the application of disaster management. This paper is suggested to construct a web-based 3D geo-spatial information mapping platform to visualize various spatial information collected at the disaster site in a web environment. This paper is presented a web-based geo-spatial information mapping service plan for the various types of 2D/3D spatial data and large-volume LiDAR point cloud data collected at the disaster accident site using HTML5/WebGL, web development standard technology and open source. Firstly, the collected disaster site survey 2D data is constructed as a spatial DB using GeoServer's WMS service and PostGIS provided an open source and rendered in a web environment. Secondly, in order to efficiently render large-capacity 3D point cloud data in a web environment, a Potree algorithm is applied to simplifies point cloud data into 2D tiles using a multi-resolution octree structure. Lastly, OpenLayers3 based 3D web mapping pilot system is developed for web visualization of 2D/3D spatial information by implementing basic and application functions for controlling and measuring 3D maps with Graphic User Interface (GUI). For the further research, it is expected that various 2D survey data and various spatial image information of a disaster site can be used for scientific investigation and analysis of disaster accidents by overlaying and visualizing them on a built web-based 3D geo-spatial information system.