• Proceedings of the KSRS Conference
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• 2004.10a
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• pp.283-286
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• 2004

This paper refers and implements XML Web services, which supports networked interchanges of moving object information. XML Web services are expected to be fundamental building blocks in the move to distributed computing on the Internet. As an interchange format, GML encodes semantics, syntax, and schema of geospatial and geoprocessing-related information resources. It can give great benefits to utilize raw data easily as an XML encoding format does. This paper proposes a full coverage of interoperable location trajectory services consisting of 3 independent modules: a moving object database, a data processing server, and a web services interface module. For communications, SOAP protocols and WSDL documents are used, which can guarantee an interoperability of a system regardless of different platforms and service channels. This paper also designs a GML data format that represents location information of probe cars.

• Journal of Korean Society of Rural Planning
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• v.11 no.2 s.27
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• pp.1-8
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• 2005

This study is to develop a web-based integrated system for flow of agricultural products based on recent researches with engineering approach. The system stands on the basis of web for accessibility and usability. Three parts of the system consist of analysis of regional shipping characteristics using tank model, estimation of pallet load efficiency with Monte Carlo Simulation, a long term prediction of market price with reliability analysis. Besides a decision support module for selecting optimal shipping market is added through synthesizing techniques and spatial analysis using GIS and applied to Chinese cabbage of Pyeongchang in 2004.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.499-502
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• 2005

국가GIS사업 및 관련사업을 통해 다양한 지리정보가 생산되었으며, 다양한 분야의 사용자에 의해 구축 활용되는 지리정보의 특성에 따라 전국에 분포되어 관리되고 있다. 이러한 지리정보가 사장되지 않고 목적에 맞게 효율적으로 활용되기 위해서는 다양한 콘텐츠 확보가 이기종간 공동활용이 선행될 필요가 있다. 따라서 본 연구에서는 서로 다른 시스템 환경에서 지리정보를 연계하여 활용할 수 있도록 카탈로그 모듈, 브로커 모듈, 맵브라우저 모듈, 지리정보등록 모듈 등을 구현하고 Informix, Oracle, GMS, ZEUS 등 여러 가지 조합이 도출될 수 있는 시스템을 대상으로 검증실험을 하였다. 본 연구에서 도출된 모듈을 적용하여 데이터 연계의 제약조건인 DMBS, 공간DBMS 영향을 최소화함으로써 지리정보공유 활성화에 기여할 수 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2006.10d
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• pp.161-164
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• 2006

최근 데이터 처리기술의 급속한 발전과 함께 컴퓨터 및 Mobile 환경이 차츰 고사양화 됨에 따라 GIS에서는 이러한 고사양 환경을 활용하여 기존의 단순 지도서비스에 그치지 않고 해당 위치에 대한 정보인 POI(Point of Interest) 서비스까지도 요구되어지고 있다. 그러나 현재 GIS 기반이 되는 지리공간 데이터 및 POI 정보들에 대한 표준이 마련되어 있지 않아 각각의 서비스 업체들 간에 이질적인 데이터를 가지고 시스템의 중복구축이라는 문제점을 앉고 있다. 특히 POI 서비스는 POI 정보 불충분으로 인해 단순 지명 서비스만을 제공하고 있는 실정이며, 원하고자 하는 정보에 대한 검색기능 또한 미비하여 사용자의 요구에 만족하지 못할 수준의 서비스를 제공하고 있다. 이에 본 논문에서는 현재 GIS의 지리공간 데이터 표준으로 대두되고 있으며, 지도 정보와 함께 다양하고 체계적인 POI 정보를 포함하고 있는 GML을 기반으로 하여 지도검색 및 POI 검색을 제공하는 GVP 모듈을 설계한다.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 1999.10c
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• pp.783-788
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• 1999

In this study, a decision support system (DSS) was developed to calculate optimal wastetreatment cost, treatment level and treatment quantity of various pollutants for applying for in rural basin. The DSS includes a gegraphic informatino system (GIS), relational database system (RDBS), water quality models(Loading function , WASP5), watershed pollution load calculation module(SPLC), optimal water quality management plan to satisfy the water quality regulations. The system can be modified by user to trace the optimal condition for decision. The effort was conducted to apply the developed DSS to select the for optimal water quality management plan small rural basin called Kwanri Stream.

• Proceedings of the Korea Water Resources Association Conference
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• 2015.05a
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• pp.464-464
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• 2015

수문해석을 수행할 때 유역의 지형으로 부터의 얻어진 수문인자를 사용한다. 유역의 경사나 흐름방향과 같은 지형적인 수문인자는 DEM 자료를 이용하여 여러 수치계산과정을 통해 얻을 수 있다. 이는 특히 유역 수문해석에 있어 유역 특성치 및 수문 인자들의 공간적으로 분포시켜 접근하는 분포형 모형에서 지형적인 입력요소 로 중요하게 사용된다. 본 연구에서는 아래와 같은 지형 수문인자 추출 모듈을 개발하고 사용하고자 한다. * Pit Remove : DEM에서 갱격자 제거 * Flat Remove : DEM에서 평격자 제거 * Flow Direction : 흐름방향 결정 * Flow Accumulation : 흐름 누적계수 결정 * Stream Definition : 하천영역 결정 * Watershed Delineation : 유역 생성 위의 모듈은 Java 오픈소스 프로그램으로서 분포형 수문해석 모형의 한 부분으로서 사용 가능하며, GIS 프로그램에 의존하지 않고 사용할 수 있다. 이 모듈은 이후 분포형 수문해석 프로그램 개발에 사용할 계획이며 연구에 사용되는 컴퓨팅 도구와 환경에 독립적으로 사용이 가능하다.

• Journal of Korea Water Resources Association
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• v.43 no.7
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• pp.667-679
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• 2010

The distributed hydrologic model has been considerably improved due to rapid development of computer hardware technology as well as the increased accessibility and the applicability of hydro-geologic information using GIS. It has been acknowledged that physically-based distributed hydrologic model require significant amounts of data for their calibration, so its application at ungauged catchments is very limited. In this regard, this study was intended to develop a distributed hydrologic model (S-RAT) that is mainly based on conceptually grid-based water balance model. The proposed model shows advantages as a new distributed rainfall-runoff model in terms of their simplicity and model performance. Another advantage of the proposed model is to effectively assess spatio-temporal variation for the entire runoff process. In addition, S-RAT does not rely on any commercial GIS pre-processing tools because a built-in GIS pre-processing module was developed and included in the model. Through the application to the two pilot basins, it was found that S-RAT model has temporal and spatial transferability of parameters and also S-RAT model can be effectively used as a radar data-driven rainfall-runoff model.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.106-112
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• 2008

Personalization is user oriented dynamic method based on user preferences for easy access to what users want to view or get. It has become more important in mobile domain with rapid growth of wireless Internet and mobile phone market after success of web based market and therefore, it can be applied to service of spatial analysis result. In this paper, spatial analysis using user profile and notification service methods are proposed as one of personalized spatial data service methods for mobile users. A service system for spatial analysis with user profile is designed to prove possibility of spatial analysis based on user preferences and notification service is also designedto show generated output can be sent to user's mobile devices efficiently to make users informed of preferred information. Prototype system is implemented and it is applied to real estate data that has many selectable conditions by users. Information service based on user preferences can be applied to spatial data by using proposed system and it is efficient when cache module is used to shorten response time. Various user models for application domains and performance evaluation methods need to be developed in the future.

• Journal of Korea Water Resources Association
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• v.31 no.1
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• pp.35-44
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• 1998

An integrated system of GIS and water quality model was suggested including the pollutant loads from the watershed. The developed system consists of two parts. First part is the GIS module. The geographic information system of the study area was built to provide the information on landuse and several surface factors concerning the overland flow processes of water and pollutants. Second part is the modeling modules which include storm event pollutant load model(SEPLM)., non-storm event pollutant load model(NSPLM), and river water quality simulation model(RWQSM). Models can calculate the pollutant load from the study area. The databases and models are linked through the interface modules resided in the overall system, which incorporate the graphical display modules and the operating scheme for the optimal use of the system. The developed system was applied to the Chungju multi-purpose reservoir to estimate the pollutant load during the four selected rainfall events between 1991 and 1993,. based upon monthly basis and seasonal basis in drought flow, low flow, normal flow and wet flow.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.25 no.3
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• pp.257-266
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• 2007

The research on red tide is generally in progress through field work, such as the naked eye and sampling. It was difficult to forecast exactly the course, from appearance of red tide to disappearance. with the established ways of investigation and analysis. Accordingly it is need to analyze environmental factors in time and space, the appearance of red tide and the path of its migration by more objective and scientific methods. In this study, GIS is applied to analyse the space character of red tide and the interpolation of IDW(Inverse Distance Weight) is applied to assume the density distribution of red tide after gather data by using Arc/Info. After IDW interpolation, the sea area occurred over 1,000 cells/ml of red tide density is extracted with CON and SUM Function of Grid Module, and the density of the sea area is accumulated daily. As a result of this study, the distribution condition of red tide is found timely and spacially by applying GIS to the sea area of red tide, the results indicated that the spatial density and the cumulative frequency about the origin of red tide using GIS, the sea area demonstrated that the maximum density and the maximum frequency varied significantly over the Nammyun of Namhae-Is. with the maximum frequency being 49 times. accordingly if data about the areas of red tide will occur from the present are accumulated, the shifting route of red tide occurrence and extinction can be predicted.