• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.8
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• pp.1459-1464
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• 2006

There are two approaches to construct mobile GIS, Vector and Raster methods, according to the map data transformation format from server to mobile client. Each method requires a different implementation architecture of server and client modules for mobile map services. And each have advantages and disadvantages at the different aspects. This thesis implements these two approaches, thus, compares the each merits, by experiments. They include the transmission performance, map quality, and so on.

• Journal of Advanced Marine Engineering and Technology
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• v.34 no.3
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• pp.407-412
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• 2010

According to the remarkable advances in sonar technology, positioning capabilities and computer processing power we can accurately image and explore the seafloor in hydrography. Especially, Multibeam Echo Sounder can provide nearly perfect coverage of the seafloor with high resolution. Since the mid-1990's, Multibeam Echo Sounders have been used for hydrographic surveying in Korea. In this study, new marine data set as an effective decision-making tool in various fields was proposed by visualizing and combining with Multibeam sonar data and marine spatial data sets such as satellite image and digital nautical chart. The proposed method was tested around the port of PyeongTaek-DangJin in the west coast of Korea. The Visualization and fusion methods are described with various marine data sets with processing. We demonstrated that new data set in marine GIS is useful in safe navigation and port management as an efficient decision-making tool.

• 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.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2001.10a
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• pp.460-465
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• 2001

Pollutant load using unit load method is calculated by simply equation, especially, very useful in the area that didn't exist about water quality data. However, it takes long time to calculate pollutant load with area in which there is various pollutants and if the boundary of a basin altered, the work of calculation about pollutant load must be begun from the first again. Therefore, a Total Daily Load Program(TDLP) was developed to calculate pollutant load automatically in rural area. The TDLP includes a geographic information system(GIS), relational database system(RDBS), User Interface. This Program can provide user with creating a boundary of the basin that user is concerned with to satisfy the water quality regulations and calculating daily load for various pollutants. The effort was conducted to apply the developed TDLP to calculating pollutant load in rural basin called Bok-ha river.

• Journal of information and communication convergence engineering
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• v.7 no.1
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• pp.41-45
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• 2009

In mobile GIS environments, a client needs to receive the isogram data with a topographical map from a server, if the mobile client wants to display map with elevation information. Because the elevation data size is normally quite large, the client will suffer some problems to receive the elevation data from server. The main reason is a resource limitation of the mobile devices. To overcome these problems, this paper proposes new data structures and algorithms. They are designed for efficient transmission of contour data to a client. Because of the contour data are generated as a vector style from elevation information stored at a server, the proposed algorithms are focused to minimize the transmission data volume and time.

• Proceedings of the Korea Multimedia Society Conference
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• 2002.05d
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• pp.1056-1061
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• 2002

지리정보시스템은 이미 우리 생황의 많은 분야에서 활용되고 있으며, 점차 그 활용 범위가 확대되어 가고 있다. 이러한 지리정보시스템을 WWW 환경에서 구축함으로써 웹 브라우저만 있으면 누구나 쉽게 지리정보시스템을 접할 수 있게 되었다. 본 논문에서는 지리정보시스템과 같이 많은 데이터를 처리하기에는 속도상의 문제가 발생할 수 있기 때문에, 이를 해결하기 위한 방법으로 Client/Server 설계, GIS-Engine 설계, 위치 검색 시스템 설계, 수직 분할 구조의 설계 등 Web 기반의 지리정보시스템의 설계 기법을 고찰해 보고, 이들 설계 기법을 이용한 관광지리정보시스템을 설계해 보았다. 앞으로 계속된 연구를 통하여 이를 구현하여 Web-GIS를 관광분야에 활용할 수 있도록 할 것이며, Web-GIS가 단지 지리정보의 검색시스템으로 한정하지 않고 응용 범위를 확대하여 다양한 분야에서 활용될 수 있도록 노력하겠다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07b
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• pp.1196-1199
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• 2003

Recently, the development of diagnosis technique with high confidence is important on power equipment, for this reason is use for measurement and analysis of PD with prior appearance of insulation breakdown. In this paper, we presents the analysis of trouble signal to use ${\phi}-Q$ method which display 2D and 3D Equipment of simulation has made independently DS for 170kV GIS of one phase with same on field. The detected signal through the sensor of Induction and Acoustic Emission is classified to use characteristic neural network algorithm and then it is analysis.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2010.06a
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• pp.120-120
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• 2010

To detect the PD events, we have studied a fusion sensor, the UHF sensor and the single-walled carbon nanotube(SWNT) gas sensor. We are accustomed to the UHF sensor which have employed to detect the partial discharges in apparatus GIS-like. But the SWNT gas sense is a newly way proposed to detect the partial discharges. In this study, we monitored not only the changes of the electrical conductance of the SWNT sensors in responding to the PD events but also the signal of the UHF sensor at the same time with IEC 60270 standard method for reference on the partial discharge events.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.06a
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• pp.74-78
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• 2010

최근 국토해양부의 주도로 기존 도시를 중심으로 한 도시재생사업이 활발하게 이루어 지고 있는 시점에서 개발로 인한 경관의 변화와 평가가 중요하게 다루어지고 있다. 경관평가에 있어서 선행되어져야 할 기본적이면서도 중요한 것이 바로 조망점의 선정이다. 그러나 현재까지도 조망점의 선정방식은 정확한 지표나 근거 없이 평가자의 주관적이고 인위적인 방식에 의해 선정되어 왔다. 따라서 본 연구에서는 GIS와 공간구문론을 이용하여 보다 객관적이고 정량화된 조망점 선정 방식을 제시하고자 한다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.1
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• pp.113-118
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• 2014

Recently, a few studies on context information have been focused to collect phenomena data like a temperature and a humidity in indoor environments. The importance of the former is increasingly recognized with changing environments and increase of heat stress in building. In this paper we present an indoor comfort index framework based on GIS for supporting context information instead of phenomena data in environments. We also present method for supporting comfort index and context information based on GIS in outdoor environments.