• 한국공간정보시스템학회:학술대회논문집
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• 1998.07a
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• pp.181-195
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• 1998

지리 정보 시스템(GIS)은 그 특성상 대용량의 GIS 데이타를 사용하며, 다양한 운영체제와 하드웨어 상에서 구현된다. 이렇게 상이한 운영체제와 하드웨어상의 공간데이타들은 일반적으로 서로 다른 GIS 데이타 포맷을 갖고 있기 때문에 효율적인 자료 교환이 불가능하다면 데이타 공유가 매우 어려울 뿐만 아니라 공통 데이터의 중복 보관 및 관리로 인해 막대한 경제적 손실을 가져온다. 이와 같은 문제점을 해결하기 위해 국외에서는 이미 GIS 데이타 교환을 위한 방안으로 공통 교환 표준 포맷 작업이 10여년 전부터 진행되어왔으며, 국내의 경우도 국가 차원에서 지리 정보시스템의 국가 표준을 설정하고, 기본 공간 데이타베이스를 구축하고 있다. 그리하여, 국가 기본 포맷과 공통 데이타 교환 포맷의 표준으로 SDTS(Spatial Data Transfer Standard)를 채택하였다. 본 논문에서는 범용의 SDTS 변환 시스템의 구현에 필요한 공간 데이타 분석, 논리적 설계, 물리적 설계 등의 전반적인 SDTS 변환과정, 테스트 검증 사항, 그리고 반드시 지켜야 할 규칙들을 제시한다. 마지막으로, 실제 공간 데이타인 GOTHIC과 SDTS 간의 변환 시스템의 설계와 구현에 대해서 언급한다.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.1931-1935
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• 2009

Korean railway network GIS-based information system requires so much cost and time. One of the difficulties is due to the fact that GIS-based information system requires the feature database for GIS, which is generally built manually from many as-built drawing files. In order to build-up database automatically Using GPS coordinates, this study suggests the automatic data conversion from electronic drawings to make feature database for GIS. The proposed method can be applied to build large-scale railway facility management system.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.437-444
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• 2008

최근 유비쿼터스 시대를 맞아 건설 분야에서 이용되는 CAD 자료에서 GIS 자료로의 변환 및 융복합에 대한 요구가 증대되면서 상호변환을 위한 연구가 활발하게 진행되고 있다. 본 연구에서는 건설도면 CAD 데이터를 활용하여 수치지도의 건물데이터를 수정, 갱신하기 위한 방법론의 일환으로 건설도면의 건물외곽선을 추출하여 수치지도의 건물데이터 수준으로 일반화하는 선형 단순화 알고리즘을 비교 분석하였다. 선형 단순화 알고리즘은 Douglas-Peucker 알고리즘, Lang 알고리즘, Reumann-Witkam, Opheim 알고리즘을 적용하였으며 분석방법으로는 시각적 분석, 절점 수, 총길이, 면적 변화율 분석 그리고 각 절점이 수치지도 작성내규를 만족하는 비율을 이용하였다. 분석 결과 Douglas-Peycker 알고리즘이 시각적 측면과 절점 수 감소율 측면에서 상대적으로 우수한 단순화 결과를 보여주었으나 수치지도 작성내규 만족도 측면에서는 공통적으로 $50{\sim}60%$ 수준의 만족도를 보이고 있어 국내의 수치지도의 건물데이터를 작성하기 위한 단순화 기법으로는 한계가 있는 것으로 나타났으며 이를 만족시키기 위한 일반화 알고리즘의 개발이 필요하다고 판단된다.

• 한국신재생에너지학회:학술대회논문집
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• 2011.11a
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• pp.59.2-59.2
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• 2011

This study presents a new method for coupling ArcGIS (popular GIS software) with TRaNsient SYstems Simulation (TRNSYS, reference software for researchers and engineers around the world) to use capabilities of the 4 and 5-parameter PV array performance models within the ArcGIS environment. Using the validated and industry-proven solar energy simulation models implemented in TRNSYS and other built-in ArcGIS functionalities, dynamic characteristics of distributed PV potential in terms of hourly, daily or monthly power outputs can be investigated with considerations of diverse options in selecting and mounting PV panels. In addition, the proposed method allows users to complete entire procedures in a single framework (i.e., a preliminary site survey using 3D building models, shading analyses to investigate usable rooftop areas with considerations of different sizes and shapes of buildings, dynamic energy simulation to examine the performances of various PV systems, visualization of the simulation results to understand spatially and temporally distributed patterns of PV potential). Therefore tedious tasks for data conversion among multiple softwares can be significantly reduced or eliminated. While the programming environment of TRNSYS is proprietary, the redistributable executable, simulation kernel and simulation engine of TRNSYS can be freely distributed to end-users. Therefore, GIS users who do not have a license of TRNSYS can also use the functionalities of solar energy simulation models within ArcGIS.

• Journal of Korean Society for Geospatial Information Science
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• v.2 no.1 s.3
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• pp.99-106
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• 1994

Raster data mode and Vector data are the two major model in geographic information systems. These two data models are difficult to be intergrated because of their differences in structures and properties. Almost all of the current GIS systems process in one data model by converting one data type to another type. So. the loss and change of information caused by data conversiion degrades the accuracy of data. In this paper, we propose a new data model which can process two data models without conversion. We use quadtree for raster data and topological vector model for vector data. The output is formed as raster data model of quadtree. We can get more accurate overay output, and this intergrated model is more suitable for data like forest, landuses, soils that consist of classes which have small distribution changes.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.201-204
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• 2002

Although the reuse of the cached data for scrolling the map reduces the amount of passed data between client and server, it needs the conversions of data coordinates, selective deletion of objects and cache compaction at client. The conversion is time intensive operation due to limited resources of mobile phones such as low computing power, small memory. Therefore, for the efficient map control in the vector map service based mobile phone, it is necessary to study the method for reducing wireless network bandwidth and for overwhelming the limited resources of mobile phone as well. This paper proposes the methods for caching pre-received spatial objects in client-server systems for mobile GIS. We also analyze the strengths and drawbacks between the reuse of cached data and transmission of raw data respectively.

• Spatial Information Research
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• v.22 no.2
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• pp.31-44
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• 2014

According to the purpose of applications, the application program will utilize the most suitable data model and 3D modeling data would be generated based on the selected data model. In these reasons, there are various data sets to represent the same geographical features. The duplicated data sets bring serious problems in system interoperability and data compatibility issues, as well in finance issues of geo-spatial information industries. In order to overcome the problems, this study proposes a spatial data fusion method using topological relationships among spatial objects in the feature classes, called Topological Relation Model (TRM). The TRM is a spatial data fusion method implemented in application-level, which means that the geometric data generated by two different data models are used directly without any data exchange or conversion processes in an application system to provide indoor LBSs. The topological relationships are defined and described by the basic concepts of IndoorGML. After describing the concepts of TRM, experimental implementations of the proposed data fusion method in 3D GIS are presented. In the final section, the limitations of this study and further research are summarized.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.170-172
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• 1998

지리 정보 시스템(GIS)은 그 특성상 대용량의 GIS 데이터를 사용하며, 다양한 소프트웨어와 하드웨어 상에서 구현된다. 이렇게 상이한 하드웨어, 소프트웨어, 그리고 운영 체제상에서 공간 데이터들 간의 효율적인 데이터 교환이 불가능하다면 데이터 공유가 매우 어려울 뿐만 아니라 데이터의 중복 보관 및 관리로 인해 막대할 경제적 손실을 가져온다. 이와 같은 문제점을 해결하기 위해서 국가 차원에서 지리 정보 시스템에 관해 국가 표준을 설정하고, 공간 데이터베이스를 구축하고 있는데 공통데이터교환 포맷으로 채택된 것은 SDTS이다. 본 논문에서는 국가 공통데이타교환 포맷인 SDTS 데이터와 GOTHIC의 데이터를 상호 교환할 수 있는 데이터 변환 시스템을 설계 및 구현한다. 데이터 변환 시스템의 대상이 되는 GOTHIC은 영국 Laser-Scan에서 개발한 GIS 개발 도구로 실세계를 구성하는 개체들을 서로 구분될 수 있는 하나의 객체로 표현하고 있다. 본 논문에서는 우선 GOTHIC과 SDTS의 데이터 포맷 및 데이터의 저장 방법에 대해 분석한다. 그리고, 구현하려고 하는 데이터 변환 시스템의 전체적인 구조를 설계하고, 구조의 각 단계별로 수행될 작업을 구현함으로써 데이터 변환 시스템을 개발한다.

• Journal of Digital Contents Society
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• v.15 no.1
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• pp.113-120
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• 2014

In recent years, devices using the smart ponwa IT service is activated, to research how the fusion of two or more devices will be able to be interest in the soybeans. One of them in the mobile sector through the development of network and hardware digital geo-spatial map of the rapid advances being made and the computer, how do you map data to efficiently simulate a 3D environment, providing services through a virtual environment focused on whether be. In this study, augmented reality and GIS (Geographic Information System), SLM (Static LOD Model) that combines augmented reality technology on the basis of the basic concepts and approaches in geographic space and how Augmented Reality Based on this interpretation of the relevant content What to do in the development and utilization has a purpose. In this study, the conventional SLM 3DS model data structure of a data format conversion of the proposed possibilities for analyzing and, SLM model generation and format of the existing three-dimensional visualization tools SLM model format for converting a format to a model function, and visualization features. In addition, 3D virtual model to propose a format for efficiently making.

• Journal of the Korean Society of Industry Convergence
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• v.27 no.3
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• pp.609-618
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• 2024

System reliability prediction in the development stage is increasingly crucial to reliability growth management to satisfy its target reliability, since modern system usually takes a form of complex composition and various complicated functions. In most cases of development stage, however, the information available for system reliability prediction is very limited, making it difficult to predict system reliability more precisely as in the production and operating stages. In this study, a system reliability prediction process is considered when the reliability-related information such as SIL (Safety Integrity Level) and MTTFd (Mean Time to Dangerous Failure) is available in the development stage. It is suggested that when the SIL or MTTFd of a system component is known and the field operational data of similar system is given, the reliability prediction could be performed using the scaling factor for the SIL or MTTFd value of the component based on the similar system's field operational data analysis. Predicting a system reliability is then adjusted with the conversion factor reflecting the temperature condition of the environment in which the system actually operates. Finally, the case of applying the proposed system reliability prediction process to a high performance mooring platform is dealt with.