• Title/Summary/Keyword: GIS Model

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GIS for Subsidence Analysis by Considering Surface Condition (지표면의 조건을 고려한 지반침하 분석용 GIS)

  • 권광수;이준용;박형동
    • Economic and Environmental Geology
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    • v.34 no.6
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    • pp.595-600
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    • 2001
  • Recently, interests in subsidence hazard have been increased due to the underground construction such as subway construction and managements of abandoned mines. GIS analysis of subsidence hazard has a lot of advantages in handling of spatial data and managing database. For better result of GIS analysis, there are some necessities of modifying previous subsidence theory and model. To take surface profile into account allows the application of complicated topology. Furthermore. for 3-dimensional analysis. two subsidence profile curves that are perpendicular to each other should be considered simultaneously. Through these modifications, the model for subsidence analysis using GIS can be established. With ideal case of cavities and other conditions, GIS analysis was accomplished and meaningful results were produced. More realistic properties of cavity. soil layers, groundwater condition and topology will enable GIS analysis method to produce more reliable result and to widen the area of applications.

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Development of a Potential Centrality Evaluation Model for Rural villages ( II ) - Application of model by Survey of villages and Analysis using GIS - (농촌마을의 중심성 평가 모형의 개발 (II) - 자료조사 및 GIS분석을 통한 모형의 적용 -)

  • 김대식;정하우
    • Magazine of the Korean Society of Agricultural Engineers
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    • v.44 no.1
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    • pp.81-92
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    • 2002
  • The purpose of this paper, the 2nd stage of this study. is to test the applicability of the potential centrality evaluation model (PCEM) to a case study area. To verify the practical applicabilities of the PCEM, an administrative area of Ucheon-myeon, Hoengseong-gun, Gangwon-do was selected as a study area. Full data on the human environments of total 72 villages within the study area were surveyed. Data on the natural environments were collected through GIS analysis from digital maps developed far this study. The highest PCI (Potential Centrality Index) score was shown at Uhang village of which one being 841 (total score being 1,000), the real single center village of the study area. The evaluation results on potential centeralities of all the villages in the study area would provide decision-makers with more precised information for selection of center villages for development project.

Network Modeling of Paddy Irrigation System using ArcHydro GIS (ArcHydro를 이용한 GIS기반의 관개시스템 네트워크 모델링)

  • Park Geun-Ae;Park Min-Ji;Jang Jung-Seok;Kim Seong-Joon
    • Proceedings of the KSRS Conference
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    • 2006.03a
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    • pp.53-57
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    • 2006
  • 현재, 많은 분야에서 데이터 모델링을 지원하는 GIS관련 프로그램으로 ArcObject 컴포넌트를 제안하고 있다. 특히 수자원분야에서 유역과 하천네트워크의 정확하고 효과적인 표현을 위해 ArcHydro Model이 개발되었으며 다양한 분야에서 활용되고 있다. 본 연구에서는 안성군 고삼면의 안고용수구역을 대상으로 ArcHydro Model을 이용하여 관개 네트워크를 구성하기 위해 유역경계, 하천망, 수리시설물의 위치도, 수혜구역도 등의 기본 공간자료들을 구축하고, 이 자료들을 이용하여 수리시설물에 따른 수혜구역을 가시적으로 확인가능하도록 하기 위해 하천의 위상관계를 정립하고 공간자료간의 연계성을 구성하였다. 또한 수리시설물의 농업용수 수요공급량의 정량적인 정보를 획득하기 위하여 ArcHydro Model에 한국농촌공사에서 개발한 AWDS (Agricultural Water Demand and Supply Estimation System. 농촌용수 수요공급량 시스템)와 연계하고, 시설물정보, 수요량분석, 공급량분석을 할 수 있는 메뉴를 구성하여 그 정보를 획득하였다.

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Simulation of Urban Expansion Causing Farmland Loss and Sprawl Phenomena with Cellular Automata Technology

  • Kim Dae Sik
    • Journal of The Korean Society of Agricultural Engineers
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    • v.46 no.7
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    • pp.23-32
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    • 2004
  • A spatial simulation model for rural and urban sprawl phenomena was developed with GIS and cellular automata techniques. The model finds out built-up areas invading toward rural areas required for development of existing urban area. Probability of land use change for optimizing the development area was determined using a land suitability analysis method interfaced with GIS methods, based on several criteria in terms of geographic and accessibility factors such as slope of land and distance from city center. Weighting values of the criteria were quantified by an analytic hierarchy process method. For model applicability test, the parameters of criteria were calibrated based on the changes in time series land use data of the test city for 1986, 1996, and 2000, which were classified by remote sensing techniques. Simulated and observed areas in land use maps for city shape of 1996 showed good similarities with each other through a morphology verification method. The model enabled us to evaluate the spatial expansion phenomena of cities considering boundary conditions, and also to simulate land use planning for rural areas in urban fringe.

Study of a GIS Based Land Use/Cover Change Model in Laos

  • Wada, Y.;Rajan, K.S.;Shibasaki, R.
    • Proceedings of the KSRS Conference
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    • 2003.11a
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    • pp.266-268
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    • 2003
  • This is based on the AGENT-LUC model framework. Luangprabang Province has the largest percentage of shifting cultivation area in Laos PDR. The model simulates the spatial and temporal patterns of the shifting cultivation in the study area, using a GIS database while the total area of shifting cultivation is controlled by supply and demand balance of food. The model simulation period is from 1990 to 1999, at a spatial resolution of 500m. The results are evaluated using statistical data and remote sensing images. Through the validation, it is concluded that the trends simulated agrees to that of statistical data and the spatial and temporal patterns are also replicated satisfactorily.

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Propagation characteristics of AE signal in the connection of GIS (GIS 결합부의 음향신호 전달특성)

  • 서판석;최남호;구경완;김종석;한상옥
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.07a
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    • pp.311-314
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    • 2001
  • This paper describes the simulation study, conducted on the propagation characteristics of AE signal in the connection of GIS. In the high voltage and large power system, the equipment with SF$\sub$6/ gas insulation which consists of the component part enclosed in the compressed gas has less affected by the environment than with air insulation. When the breakdown in the electric installation occurs, it takes much time to repair them though. Therefore it is very important to diagnose the propagation characteristics of AE signal in the GIS. So, in this investigation, we make a plane model of 362 kV GIS and modal and harmonic analysis to observe the vibro-acoustic property. Through the result of the analysis, we can make a further understanding on the vibro-acoustic characteristics of AE singnal in the connection of GIS.

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Calculation of Design Flood Discharge Using GIS Data and HEC-HMS (지형정보자료와 HEC-HMS를 이용한 계획홍수량산정)

  • Kim, Sun-Joo;Yoon, Chan-Young;Kim, Pill-Sik
    • Proceedings of the Korean Society of Agricultural Engineers Conference
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    • 2001.10a
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    • pp.340-343
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    • 2001
  • The main objective of this study is to simulate design flood discharge of the Sungjoo basin. GIS and HEC-HMS were used in this study. GIS technique can extract various hydrological factors from D.E.M(Digital Elevation Model) and the parameters extracted from each watershed were applied to the HEC-HMS. As a result of this study, GIS technique is useful to tile extraction of watershed characteristics factors and HEC-HMS is successful in tile simulation of design flood discharge.

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3D GIS for Urban Combat Training (도시 전투 훈련을 위한 3차원 GIS)

  • 김재형;김현철;정창성
    • Proceedings of the Korean Information Science Society Conference
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    • 2001.10a
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    • pp.166-168
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    • 2001
  • 3D GIS(Geographical Information System)은 2D GIS를 고도값을 고려한 3D 공간으로 확장한 GIS System이다. 3D GIS는 기존의 2D와는 다른 Data Format을 기반으로 훨씬 다양한 기능을 지원하는 Operation들을 제공한다. 본문에서는 각 노드들의 상관 관계를 묘사하는 데 장점을 가진 Topological Data Model에 대해 알아보고, 이 모델에서 지원이 가능한 여러 가지의 3D Operation들을 알아보고 도시내의 다양한 상황하에서 기능을 지원 할 수 있도록 한다.

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Application of Flood Discharge for Gumgang Watershed Using GIS-based K-DRUM (GIS기반 K-DRUM을 이용한 금강권 대유역 홍수유출 적용)

  • Park, Jin-Hyeog;Hur, Young-Teck
    • Journal of Korean Society for Geospatial Information Science
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    • v.18 no.1
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    • pp.11-20
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    • 2010
  • The distributed rainfall-runoff model which is developed in the country requires a lot of time and effort to generate input data. Also, it takes a lot of time to calculate discharge by numerical analysis based on kinematic wave theory in runoff process. Therefore, most river basins using the distributed model are of limited scale, such as small river basins. However, recently, the necessity of integrated watershed management has been increasing due to change of watershed management concept and discharge calculation of whole river basin, including upstream and downstream of dam. Thus, in this study, the feasibility of the GIS based physical distributed rainfall-runoff model, K-DRUM(K-water hydrologic & hydraulic Distributed RUnoff Model) which has been developed by own technology was reviewed in the flood discharge process for the Geum River basin, including Yongdam and Daecheong Dam Watersheds. GIS hydrological parameters were extracted from basic GIS data such as DEM, land cover and soil map, and used as input data of the model. Problems in running time and inaccuracy setting using the existing trial and error method were solved by applying an auto calibration method in setting initial soil moisture conditions. The accuracy of discharge analysis for application of the method was evaluated using VER, QER and Total Error in case of the typhoon 'Ewiniar' event. and the calculation results shows a good agreement with observed data.

Development of Landscape Diagnosis Model based on Public Participation GIS for Public Participation (PPGIS(Public Participation GIS)에 기반한 참여형 경관진단모델의 개발)

  • Jeong, Kyeong-Seok;Moon, Tae-Heon;Lee, Seong-Yong;Ha, Chang-Hyoun
    • Journal of the Korean Association of Geographic Information Studies
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    • v.9 no.4
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    • pp.151-164
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    • 2006
  • The aim of this study is to develop a Diagnosis Model of Landscape(DML), which is a kind of Public Participation GIS(PPGIS) under web environment in the landscape planning field. Following the nature of public participation, DML was intended for ordinary people as well as for professional group. Therefore, DML, which is equipped with Survey Map to provide a participant with information in advance, Diagnosis Map to encourage public participation, and Image-base Map module to make a comparative study of photo-images by time series and to save photo-images, furnishes intuitive interfaces easy to use as possible. DML induces the public to participate actively in a debate on landscape problems and gathers data on diverse opinions as well. The experimental running of this DML on Uiryeong-Eup and Hamyang-Eup, Gyeongnam as case study areas, showed that it had great flexibility of use as a diagnosis model of landscape.

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