• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.5
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• pp.149-157
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• 2008

In this paper, a POI(Point-of-Interest) telematics service platform, in which detailed POI telematics services are discovered automatically and provided, is developed. The platform discovers services with UPnP middleware and provides a location-based service using GIS information. It is implemented by a telematics server, terminals, and service gateways and tested by applying test scenario for validation. Also, the response time and throughput of UPnP messages in the platform is measured and analyzed. The result shows that it has little impact on the service network congestion.

• Journal of Korea Spatial Information System Society
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• v.6 no.2 s.12
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• pp.63-75
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• 2004

This paper proposes a Web Service framework on both wired and wireless network environment that can be interoperable and extensible among geo-spatial servers. Mostly, OGC has studied and announced international standards which are related to web services on various kinds of geo-spatial data. Therefore, the proposed framework satisfies interoperability and extensibility for geo-spatial servers by adapting WMS, WFS, WCS, and WRS standards of OGC and web services standards of W3C. This framework, also, satisfies requirements of huge volumed data service, GML service, geo-spatial function service, and wireless network service. This framework consists of geo-spatial servers group, geo-spatial broker, and web-based client. The geo-spatial servers group includes GIS, SIIS, ITS, GNSS, and Telematics server for the purpose of providing various kinds of geo-spatial services. Especially, this paper proposes main memory based GIS server(MMG server) that can efficiently serve huge volumed GML data on wireless network environment. Finally, experimental results about the MMG server and prototype implementations of the framework show the effectiveness of this study.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.32 no.1D
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• pp.13-22
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• 2012

The 119 emergency rescue-aid service operated by Korean government is a very valuable in a society and its importance is growing in Korea as an aging society. Especially, the emergency vehicle's arrival time to accidents place is an important variable which affects initial emergency measure for patients and it depends on the road network attributes, such as emergency service station's location, accessibility to accidents place and so on. This study aims to analysis the emergency vehicles' arrival delay and the dispatch station in the viewpoint of efficiency utilizing the real rescue-aid activity data. We analyzed the dispatch distribution of the emergency rescue-aid service at first. And we analyzed high accident rate locations not involved in the fixed radius of rescue-aid service stations and display GIS map showing regions have been delayed. The input data of the road network speed is based on the KTDB (Korea Transportation Database) and historical rescue-aid data is from Gyeongsangbuk-do's fire service headquarters.

• Journal of Digital Contents Society
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• v.12 no.1
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• pp.77-83
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• 2011

Providing services in a wireless environment with existing wired-based GIS solutions have many limitations such as slow communication, processing rates, and screen size. Among the components, data is considered to be the most important factor in GIS. In this paper, I describe MVF, the most recent technology pioneered by GIS researchers. MVF is a format for efficient usage of spatial object in order to express, save and transform in mobile GIS. First, I describe the definition of MVF syntax, then the implementation of Header Section Generation Module and Main Section Generation Module through the API. Since the issues of network traffic and Hangul processing in mobile GIS are important, I especially consider development of MVF in terms of spatial data size.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.144-146
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• 1998

GIS(Geographical Information System)의 네트워크는 실세계의 도로망, 전기망, 상하수도관 등을 표현한다.[4] 우리는 네트워크 분석 기능 중 자원 할당과 입지설정과 관련된 기능들의 Gothic 시스템에서 구현하였다. 자원 할당 문제는 네트워크 상에 자원을 공급하는 공급지와 자원이 이동하는 경로, 그리고 자원의 수요지가 존재할 때, 공급지의 자원 공급 능력과, 자원의 이동 비용, 그리고 자원의 수요량과의 연관관계를 고려하여 자원이 할당되는 지역을 설정해 주는 문제이다. 입지 설정 문제는 자원을 공급하는 서비스 센터의 위치를 결정해 준다. 센터의 위치는 인구로 대표되는 소비자의 분포와 이동 비용에 의해 결정된다. 입지 설정은 어떤 지점의 인구 밀집도를 분석해 주는 포텐셜(potential) 함수[3]와, 소비자들의 이동을 최소화시킬 수 있는 센터의 위치를 설정해 주는 두 기능으로 구성된다. 센터의 위치를 설정해 주는 문제는 높은 계산 량을 요구하므로, 본 시스템에서는 네트워크 클러스터링을 이용하여 연산의 양을 줄이는 Approximation 기법을 사용하였다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.09a
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• pp.387-389
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• 2010

무선센서네트워크(Wireless Sensor Network) 기술이 전 산업에 널리 사용되면서, 텔레매틱스(Telematics), 지능형교통시스템 등과 무선센서네트워크와의 융합 서비스에 대한 수요가 높아지고 있다. 본 논문에서는 텔레매틱스, 지능형교통시스템 분야에 USN을 적용하기 위한 시스템 아키텍처를 제시한다. 그리고 이를 적용한 안전운전 서비스를 보여준다.

• The Journal of Korean Association of Computer Education
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• v.14 no.4
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• pp.11-20
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• 2011

Recently, the interests of mobile GIS(Geographic Information System) technology is increasing with the spread of wireless network, the improvement of mobile device's performances and the growth of demands about mobile services. If we refer mobile GIS system classified as 3rd generation with the success of Web 2.0, it is suggested that supplies of information from the server side couldn't enhance users' participations and the usage of service. In this study, we suggested the model of GIS 2.0 application based on Google map for Android smart-phones, which users could make, save and share information using photos and text by themselves. We were able to grasp the expectation of GIS 2.0 by expert assessment of this application and got to the core of conditions and implications for the success of GIS 2.0.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.6
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• pp.4228-4236
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• 2015

Due to the rapid advance in web and mobile computing technologies, normal users have become to produce, provide, and share a varied form of spatial data and information. In the domain of spatial information, numerous researches on GIS have been conducted to provide spatial information services based on a geo-sensor network and a data integration and processing technology. However, to provide user-oriented information, a context information model is necessary to associate GIS data with web and sensor data. Context awareness services is designed to provide specific information, minimizing users' interference. For which, the context information model expresses the relationship of various data from sensor networks and mobile applications and provides a user-specific information considering location and area of interest. Thus, this research aims to develops a context information model based air-pollution information system that obtains and analyses air pollution data and reflects the analysis results on an air-pollution policy. Also, this system aims to raise citizens' awareness on air-pollution and to promote citizens' participatory to improve city's air quality.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2010.06a
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• pp.155-163
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• 2010

최근 PDA, 휴대폰과 같은 모바일 기기 및 GPS와 같은 무선 통신 기술의 발달로 인하여 위치 기반 서비스의 이용이 확산되었다. 하지만 이러한 서비스는 사용자가 도로 네트워크에서 이동하면서 자신의 위치정보를 통해 LBS 서버에 질의를 요청하기 때문에, 심각한 개인 정보 누출의 위협이 될 수 있다. 따라서 모바일 사용자의 안전하고 편리한 위치기반 서비스 사용을 위한 개인 정보 보호 방법이 필요하다. 이를 위해 본 논문에서는 도로 네트워크 거리를 고려한 사용자 정보 보호를 지원하는 cloaking 영역 설정 기법을 제안한다. 제안하는 기법은 도로 네트워크에서 효율적이고 안전한 위치기반 서비스를 지원하기 위하여, 도로 네트워크의 거리를 고려하여 cloaking 영역을 설정한다. 마지막으로 성능평가를 통해서 제안하는 기법이 cloaking 영역 및 서비스 시간 측면에서 기존 연구보다 우수함을 보인다.

• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.902-905
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• 2008

With development of internet, location-based service (LBS) is getting more interest in wire and wireless network, and many studies are in progress to provide various services such as GIS and GPS technique related to this. Today positioning and information providing service is accomplished by mobile communication companies' chasing the cell or building unique GIS system, but there is a lot of building-cost that must be endured to define boundary of collecting precise location information from chasing Cell and provide unique location information service. In this paper, it desires to make the database of location information with using GPS, relatively precise satellite positioning system, to cut the cost of building location information service, and to present service models such as children's positioning service that is to reduce the cost of building GIS by using Web Open API and provide location information of discrete object in real-time.