• Spatial Information Research
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• v.14 no.2 s.37
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• pp.245-260
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• 2006

A practical use of the location information and user requirement are increased in a mobile environment which supports the portability. And Various service which GIS is related with a Spatial DB have been processed. Generally, logical relation of a traffic network which organizes the Road DB uses a basic node-link structure. In this way, Designed structure can not be flexible at various model apply and are not efficient with a database retrieval in a maintenance management side. In this research, We supplement with the problem of a existing network model and the limitation of the building through the design of a network model which uses dynamic segmentation. And we tried to implement efficient hierarchy model at the retrieval of the network and presentation. Designed model supports a stage presentation of various level and a hierarchy entity relation and We are expected to supplement a network spatial modelling function which the GIS has.

• Journal of the Korean Association of Geographic Information Studies
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• v.7 no.4
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• pp.65-76
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• 2004

This paper suggests design and implementation of moving objects management system using GML which is the XML encoding standard of geographic data. The proposed system integrates spatial data and moving objects data, utilizing the concept of Web Feature Services. While integrating data, standard data model and interfaces, proposed by OGC, are used. Since GML is standard for storing and transferring spatial/non-spatial data, interoperability and extendibility can be obtained. In addition, we propose efficient developing environment for the moving object management system by providing components having Web/Mobile interface. If the proposed component be development methods are used, it is easy to add or modifyservices in the mobile system and pla

• Journal of the Society of Disaster Information
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• v.13 no.4
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• pp.476-482
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• 2017

For the bridges managed by the municipalities, there is a need for a maintenance management system for the municipal governments for the scientific and systematic maintenance standard and the scientificization of the budget acquisition and execution through the quantified data base. The purpose of this study is to develop a system for efficient management of small bridgies maintained by the municipality and use ICT convergence technology such as BIM / GIS technology. The details of the system development include the development of the small bridgies maintenance program for mobile devices, the development of the small bridgies maintenance database, the development of the small bridgies integration maintenance management, and the reliability of the program system developed by checking the construction and operation contents of the small bridgies test-bed. The developed program system is linked to the development of smart name plate and reader module of non - power system.

• Journal of Korean Society for Geospatial Information Science
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• v.20 no.1
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• pp.33-41
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• 2012

BIS is an arrival guidance system which is able to supply passengers with bus service condition via Kiosks at a bus stop, internet and mobile service through pinpointing bus location in real time. It is very significant to improve the quality of traffic information by quality control of GIS-based bus network so as to maintain navigational information and to implement reliable BIS. Therefore this study aims to build criteria to quantitatively evaluate data quality of the product in accordance with the process in bus network data and to suggest guideline of quality control. To achieve this, we have categorized geometric and logical errors occurring during constructing bus network database by giving a specific case study on TAGO and set up sectional guideline and procedures to examine database for systematic and coherent quality control management. Proceeding from what has been said above, the outcome of our research leads to quality guarantee for objective and reliable bus network database and is fully expected to bring benefit of providing a more accurate public transportation information and improving reliability of BIS through preventing a variety of errors in system operation in advance.

• The KIPS Transactions:PartD
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• v.19D no.3
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• pp.229-236
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• 2012

The demand for map applications in both Web and mobile environments has been rapidly increased with the population of Web and smart phone usage. Web-based map applications are mostly developed on such environments as ArcGIS and MapServer and mobile map applications are developed on such API levels as Google Maps and Yahoo Maps. But many parts of map applications are still constructed by coding because these environments don't support high level of automation. Our MapAppGen that we have designed and implemented enhances the Web-based map application productivity by generating the map related modules that can be applied to the Drupal that is one of popular content management systems(CMS's). Comparing the applications that are constructed by the Drupal-supported GMap or NodeMap, the applications that are constructed by MapAppGen provide information on not only the interested geographical feature but also its related geographical features. MapAppGen uses Google Maps API and Drupal is a module-based system that supports the creation, composition and management of contents. We are now working on automatic generation of mobile map applications with MapAppGen.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.27 no.3
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• pp.367-374
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• 2009

Every year there are great socio-economic loss and damage caused by landslides in steep slopes. According to recent statistics, the percentage of casualty due to breakdown in steep slopes was 27.3% of all natural disasters occurring over the past decade($1998{\sim}2007$). Therefore, the nationwide scale survey on the landslide susceptibility was made to recognize the status quo for appropriate troubleshooting measure against the collapse of steep slopes. Nevertheless, few dent that the data collected is not sufficient to grasp the overall understanding of the onsite situation due to lack of spatial information. As a result, the study aims to develop a program enabling to send on site topological data and prefixed data-gather criteria directly to the central management server in real-time basis. It will be conducted through mobile devices and portable GPS system, accordingly. This program is expected to be implemented as an efficient application tool of slope spatial information acquisition.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.349-352
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• 2008

본 논문에서는 위치기반서비스(LBS : Location-Based Service)를 관광 분야에 접목해 모바일 단말기를 통하여 관광 정보를 제공하는 관광 정보 시스템에서 지능적인 맞춤형 컨텐츠를 제공하여주는 관광 정보 서비스 시스템을 구현하였다. 관광 정보 서비스 시스템에서는 사용자가 컨텐츠의 일정 반경에 들어가게 되면, 상세 정보를 출력하게 되는데 이때, 데이터마이닝 기법의 하나인 클러스터링을 이용하여 맞춤형 컨텐츠를 출력하게 된다. 시스템은 분석된 데이터를 이용하여 사용자의 입력에 가중치를 부여하고 그 가중치로 사용자의 선호도에 알맞은 컨텐츠를 출력한다. 이를 통해 사용자에게 맞는 맞춤형 컨텐츠를 제공한다.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2007.04a
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• pp.367-370
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• 2007

Recently, With explosive national land developments construction fields ate increasing, and slope failures are disastrous when they occur in mountainous area adjoining highways. but public institutions and supervisors, to manage slope need GIS for managing it more quickly and correctly. For manage slope, it is nesessary to use new IT, especially wireless internet. The current domestic population using cell phones exceeded 30 million and the domestic wireless Internet environment has matured, but implementation of mobile technology for government services isnot matured enough. In this paper the author proposed a new system of mobile PPT monitoring for managing slope inspection for Ubiquitous Environment. This new system manages data in real time and reduces human power when applied to current working environments. This research was supported by a grant(NEMA-06-NH-05) from the Natural Hazard Mitigation Research Group, National Emergency Management Agency.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2009.04a
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• pp.273-274
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• 2009

도로네트워크 데이터는 교통 정보, 경로 안내서비스 등 실시간 정보제공을 위해 차량 항법용 데이터에서 가장 핵심적인 영역에 해당하며 효율적인 관리와 유지가 필수적이다. 기존 파일 기반 시스템인 미디어 포맷(KIWI, GDF 등)에서는 콤팩트한 데이터 구성으로 읽기 위주의 빠른 매체 접근 등에 좋은 이점이 있지만, 최근 모바일 시스템 환경에 DBMS를 활용한 위치 기반 서비스(LBS)에 대한 관심이 증가 하고 있다. 이에 본 연구에서는 임베디드 DBMS를 이용하여 네트워크의 계층성을 지원하는 데이터 모델과 이를 활용한 탐색 알고리듬을 설계하고 프로토타입 시스템을 구현하였다. 특히 대규모 도로망의 원거리 탐색을 대상으로 메모리 구성과 탐색 시간 측면에서 일반 영역 탐색방법과 계층 탐색방법의 검색 결과를 비교하여 계층 탐색 방법의 효율성을 검증하였다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2003.04a
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• pp.225-231
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• 2003

최근 모바일 장치의 발전으로 인하여 이동 객체의 위치를 기반으로 하는 위치 기반 서비스(LBS:Location Based Service)가 발전되고 있다. 위치 기반 서비스에서는 이동객체의 위치 정보가 시간의 흐름에 따라 그 변화량이 방대하게 증가되기 때문에 대용량 데이터를 관리하기 위한 데이터베이스의 필요성이 요구되고 있다. 기존의 데이터베이스 시스템은 하나의 서버가 모든 처리를 담당하므로 동시 사용자 수가 제한되고, 사용자의 수가 증가할수록 성능이 저하된다. 특히, 사용자 질의의 급증에 대해 유연하게 대처하지 못해 시스템이 정지하여 서비스를 제공하지 못하게 된다. 본 논문에서는 대량의 데이터를 관리하고, 사용자 질의가 급증하여도 서비스가 계속되는 GMS/Cluster를 제안한다. 제안한 GMS/Cluster는 비공유 데이터베이스 클러스터로 독립적으로 질의를 처리할 수 있는 노드와 노드들의 묶음인 그룹으로 구성된다. GMS/Cluster는 분할 정책의 사용으로 대량의 데이터를 효율적으로 관리하여 성능이 향상되고, 복제 정책의 사용으로 서비스를 하던 노드가 정지되어도 복제본을 가진 노드가 대신 서비스를 하여 가용성이 높아지며, 서비스를 중지하지 않고 실시간으로 온라인 확장을 하여 급증하거나 접근 패턴이 변경하는 사용자 질의에 대처할 수 있다.