• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.05a
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• pp.187-190
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• 2008

Owing to rapid advancements of the mobile computing technologies and the performance of mobile device recently, the data synchronization techniques between severs and mobile clients are getting more and more important. OMA also proposes and recommends standard synchronization methods to use SyncML. However, the feasible data in the method are limited to normal document data, scheduler data, etc. This paper a standard framework based on SyncML. We call it SCGFG. The SCGFG is able to synchronize not only the above data but also GIS data which is very useful in mobile applications. It applies GML, international GIS standard, to the synchronization. By means of using XML, it is also able to resolve the serious problem that is the increase of data volume occurred by SyncML and GML. efficiently. It is highly expected to be useful in the smart synchronization of GIS data among several servers and mobile clients.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.6
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• pp.1039-1044
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• 2008

Owing to rapid advancements of the mobile computing technologies and the performance of mobile device recently, the data synchronization techniques between severs and mobile clients are getting more and more important. OMA also proposes and recommends standard synchronization methods to use SyncML. However, the feasible data in the method are limited to normal document data, scheduler data, etc. This paper a standard framework based on SyncML. We call it SCGFG. The SCGFG is able to synchronize not only the above data but also GIS data which is very useful in mobile applications. It applies GML, international GIS standard, to the synchronization. By means of using XML, it is also able to resolve the serious problem that is the increase of data volume occurred by SyncML and GML. efficiently. It is highly expected to be useful in the smart synchronization of GIS data among several servers and mobile clients.

• Journal of KIISE:Computing Practices and Letters
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• v.12 no.1
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• pp.9-20
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• 2006

Web Map Service on mobile environment, provided with cost effective mobile GIS contents and user preferred POIs(Points of interests), is strongly required at this moment when mobile and portable Internet is rapidly spreaded on mobile user community as information technology and mobile HW are evolved in its speed, bandwidth and features. As the mobile and portable Internet becomes popular in mobile services, LBS(Location Based Service) is positioned on a mobile client as one of the best information infra services. Recently mobile GIS (Geographic Information System) comes in service to support LBS, but it is constrained and limited on its system configuration and its presentation methodology of a map, and also it depends on its run time environment. In this paper, we made an effort to design and implement a GIS computing platform with server based thin client for mobile WMS(Web Map Service). For its cost effective Platform which could be easily building up POIs and GIS contents, we're not using commercial GIS solution but NGII's (National Geographic Information Institute's) DXF numerical map, and representing the maps, GIS contents and POIs by SVG(Scalable Vector Graphics) recommended by OGC(OpenGis Consortium). We're also adapting de facto standard of XML web service technology such as WSDL, SOAP to provide real time mobile GIS service on PDA as well as mobile terminal by applying a GPS receiver for a user's location information on mobile environment.

• 한국공간정보시스템학회:학술대회논문집
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• 2001.11a
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• pp.287-303
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• 2001

지리정보의 중요성이 널리 인식되고 사회 각 분야에서 지리정보에 대한 수요가 날로 증가되고 다양해지고 있지만 GIS의 개발, 설치, 유지, 보수의 어려움에 따른 고가의 비용과 시장에 대한 적응력부족으로 GIS의 광범위한 활용이 저해 받고 있는 실정이다. 또한, 개인을 위한 GIS 서비스나 응용프로그램의 하나의 기능 컴포넌트로서의 GIS 서비스가 GIS의 주류로 발전할 것으로 예측되고 있지만 이를 지원하기 위한 GIS 개발, 배포 모델과 기반기술이 결여되어 있다. 그러나, 사용자가 월 정액요금을 지불하고 인터넷 또는 인트라넷을 통하여 ASP (Application Service Provider)에 의해 원격 중앙 서버에 설치, 관리되고 있는 소프트웨어 응용프로그램을 사용하는 형식은 혁신적인 소프트웨어 개발과 배포 모델로서 차세대 컴퓨터 환경의 기초로 각광 받고 있으며 이를 GIS에 적용할 때 GIS의 광범위한 응용과 원활한 유통을 크게 추진할 것으로 기대된다. 그러므로, 현시점에서 GIS ASP를 위한 합리적인 모델과 이에 근거한 소프트웨어 플랫폼에 대한 연구와 개발이 절실히 필요하다. 본 논문에서는 ASP 환경 하에서 더욱 신속하고 편리한 GIS 개발, 통합, 배포를 가능하게 하고 보다 나은 질의 GIS ASP 서비스를 제공하기 위하여 마이크로소프트의 ASP 플랫폼인 .NET 기반의 3 계층 GIS ASP 모델을 중심으로 하는 GIS ASP 소프트웨어 플랫폼의 설계를 제시하였다.

• 한국공간정보시스템학회:학술대회논문집
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• 1998.07a
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• pp.197-209
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• 1998

WWW의 편리한 인터페이스, 뛰어난 접근성과 공유성으로 인해 웹을 이용한 GIS 서비스는 필수적으로 여겨지고 있으며, 기존의 다양한 시스템간의 상호 운용성 또한 점점 강조되어 지고 있다. 웹을 이용한 GIS 서비스를 제공하기 위해서는 1) 기존에 구축되어 있는 다양한 GIS 서버를 이용할 수 있어야 하며, 2) 방대한 양의 지도 데이타 전송으로 인한 응답시간 지연을 해결해야 한다. 이 논문에서는 Open API를 이용한 개방형 클라이언트와 클라이언트에서의 지도 데이터 캐슁 메카니즘을 제시한다. 본 논문에서 제시하는 WWW 기반 GIS는 소프트웨어간의 분산 객체 기술인 CORBA를 이용하는 3계층 구조이다.

• Journal of Internet Computing and Services
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• v.6 no.5
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• pp.97-110
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• 2005

Recently, many WMS(Web Map Services) and POI(Point of Interest) services come to be in service on the Internet using Web GIS(Geographic Information System) as Information Technology and computer H/W are evolved faster in its speed, network bandwidth and features. The Web GIS is, however, limited and constrained on the specification of its system configuration, the service class provided and the presentation methodology of a map. As the mobile Internet becomes popular in mobile service, Web GIS service on mobile environment is strongly required and to be provided by location based WMS(Web Map Service) on a mobile client such as PDA with location information of the user. In this paper, we made an effort to design and implement a GIS computing environment by thin client for mobile web map service. For implementing the thin client GIS computing environment. we were using NGII's(National Geographic Information Institute's) DXF map, representing the map by SVG(Scalable Vector Graphics) recommended by OGC(OpenGis Consortium), and adapting standard XML web service to provide the thin client GIS service on PDA by applying the location information of the user in realtime with GPS on mobile environment.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.28 no.3
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• pp.337-345
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• 2010

In general, Digital Photogrammetry is based on independent workstation system, which is costly and has complex process. In this research, a new approach method regarding Digital Photogrammetry procedure is suggested using Web Processing Service, which is a GIS standard proposed by Open Geospatial Consortium. For the experiment, many Generic Processes were defined through WPS profiling procedure which defines standard unit for Photogrammetry, and with the defined process each server and client S/W module was implemented based on WPS standards. In this paper, many users can be expected to share and reuse unit process in WPS server through the web.

• Journal of Cadastre & Land InformatiX
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• v.46 no.2
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• pp.211-224
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• 2016

Based on the 'Government 3.0', the government opens the public data and encourages the active use in the private sector. Recently, the spatial and statistical information that is one of the public data is being widely used in the various web business as a high value-added information. In this study, we propose an architecture of high-availability, high-reliability and high-performance open platform which can provide a variety of services such as searching, analysis, data mining, and thematic mapping. In particular, we present two different system architectures for the government and the public services, by reflecting the importance of the information security and the respective utilization in the private and public sectors. We also compared a variety of server architecture configurations such as a clustered server configuration, a cloud-based virtual server configuration, and a CDN server configuration, in order to design a cost- and performance-effective spatial-statistical information open platform.

• Journal of Korea Spatial Information System Society
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• v.1 no.2 s.2
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• pp.21-31
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• 1999

In accordance with the completion of the spatial database building works in the central and/or local government authorities as well as the rapid popularization of various information services through internet, it is heavily required to provide spatial information services through World Wide Web. To provide a qualified spatial information service, it is crucial to have a Web-based GIS (Geographic Information Service) service system equipped with the publicity, the convenient accessibility, and the easy-to-use user interface. In this paper, we introduce a new component system for Web-based spatial information services based on the OpenGIS Simple Feature specification for OLE/COM[3] and OLE DB specification[4]. The important functionality of a Web-based spatial information service system includes its accessibility of various existing GIS server system and huge databases in addition to the resolution of response-time delay problems caused by transmitting a large amount of digital maps via internet[6]. To cope with these problems, our component system has been designed to access heterogeneous databases in transparent manner and to support vector-based and/or image-based image production techniques for shortening transmission time.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.59-66
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• 2008

최근 유비쿼터스 컴퓨팅 환경이 발전함에 따라 교통(u-Transport), 복지(u-Care), 문화(u-Fun), 환경(u-Green), 산업(u-Business), 행정(u-Government), 도시(u-City) 뿐만 아니라 사용자의 위치와 다양한 공간 정보를 제공하는 u-GIS가 유비쿼터스 컴퓨팅 환경의 핵심 요소 기술로 대두되고 있다. 이에 본 논문에서는 기존의 PC용 MMDBMS인 HS QLDB를 확장하여 모바일 장치에서 시공간 데이타를 효율적으로 처리 및 관리할 수 있는 내장형 시공간 DBMS를 설계 및 구현하였다. 내장형 시공간 DBMS는 OpenGIS "Simple Features Specification for SQL"에서 명시하는 공간 데이타 타입과 공간 연산자를 확장하여 시공간 데이타 타입과 시공간 연산자를 제공하며, 시공간 데이타 특성들 고려한 산술 연산 코딩 압축 기법을 제공하고, 모바일 저장 장치인 플래쉬 메모리에서 효율적인 시공간 데이타 검색을 위한 시공간 인덱스를 지원한다. 그리고, 내장형 시공간 DBMS와 U-GIS 서버 사이에서 시공간 데이타 수입/수출의 성능 향상을 위한 데이타 캐슁 기능과 DBMS의 안정성을 위한 백업/복구 기능을 지원한다.