• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2010.04a
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• pp.375-378
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• 2010

Digital photogrammetry workstations are usually based on independent systems which are both expensive and complex. In this paper, through Web Processing Service, which is an Open Geospatial Consortium standard for GIS, is applied to suggest a new approach for processing photogrammetry tasks. WPS profiling is a procedure that defines generic unit process and then categorizes these processes for a specific task. The WPS profile for aerial photogrammetry was designed in this paper to help users to reuse the processes of the profile in different combinations for different tasks.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.113-118
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• 2008

The present research addresses the system design for building a geospatially-based web services application for mobile users. In recent years, geospatial information(GI) and Geographic Information Systems(GIS) are significant resources in decision-making analyses at various levels of society and activities. Recently, the integration of GIS and web services, called GIS web services, provides the wider implementation of GIS. At the present time, accessing, presenting, and manipulating updatedgeospatial information to locate geo-related facility services are real challenges related to application developers to implement for foot-travelers properly. The present paper investigates how the web services work in a GIS for discovering geo-related facility services such as a restaurant and post office in the user's vicinity. Thus, a prototype, with an architecture consisting of a windows application on the client side as well as facility services and geo-engineon the server side, were designed and implemented with the proposed GIS web services platform. On both the client and server sides, visual studio .Net technology was used. A geo-engine on the server side was also built with ESRI's MapObjects. Following successful implementation of the prototype presented in this study, the mobile user is able to invoke remote web services to assess the location of various facilities such as restaurants. Moreover, the present research demonstratesthat web services are not restricted only to web-based use, but can also be utilized by any web-connected application.

• Journal of Digital Contents Society
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• v.10 no.3
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• pp.395-400
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• 2009

The wide spread of the Internet service has brought in web GIS development. But, there are problems of the user access latencies, the network traffic, and the server overload in Internet Geographic Information System because spatial data are transferred in large volumes. In this paper, I propose a cache algorithm on client side to solve the above problems. The proposed algorithm demonstrates the performance improvement over known studies by utilizing unit time and spatial proximity. In addition, this paper conducts a performance evaluation to measure the improvement in algorithm efficiency and analyzes the results of the performance evaluation. When spatial data queries are conducted, according to our performance evaluation, hit rate has been improved over the existing algorithms.

• Spatial Information Research
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• v.19 no.4
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• pp.91-97
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• 2011

In this paper, we propose an architecture for geosemantic services. With the rapid progress of web services, wireless internet technologies and popularization of smart phone in recent years, a lot of applications based on geographic information are being developed. Moreover the search portals empowered by semantic web technologies are enabling general users to access on-line resources more easily. However, several studies in GIS domain have pointed out the practical limitation of existing service patterns, which are limited only to linking heterogenous spatial databases, insufficient for several important use cases. Hence we draw functional elements of geosemantic services from GIS and semantic web standards, and present the use cases and a new architecture for geosemantic services. This approach could set a foundation to implement geoemantic services.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.06a
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• pp.327-331
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• 2008

OGC(Open Geospatial Consortium) SWE(Senser Web Enablement)는 오픈 표준 기반 서비스로써 다중 센서의 정보를 취합하여 3차원 가시화 및 분석, 편집에 활용되는 웹시스템의 표준이다. 본 연구에서는 OGC SWE의 WFS(Web Feather Service)와 유사한 오픈 표준 기반 객체정보 웹서비스 시스템을 고안하고, 실제 지하시설물을 대상으로 OGC의 City-GML을 국내 표준인 3DF-GML으로 해체하여 웹서비스 가능성을 타진하였다. 본 연구를 통해 도출된 웹서비스는 향후 오픈 표준 기반 3차원 GIS 시스템 구축에 본보기가 될 것으로 기대된다.

• Journal of KIISE:Computing Practices and Letters
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• v.14 no.7
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• pp.728-732
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• 2008

GeoRSS is RSS which contains geospatial information, and it supports to supply diverse kinds of data through mash-up map service like the google map. It helps to implement efficient web service with simple java-scripts, but sometimes initial page loading takes too much time and causes heavy traffic when it includes lots of multimedia data. In this paper, we propose a splitting method of GeoRSS for fast accessing. As the result of experiments, we achieved improvement of browsing speed and reducing of initial data traffic.

• Journal of Korea Spatial Information System Society
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• v.11 no.2
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• pp.63-72
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• 2009

Korean Land Spatialization Program (KLSP) is an R&D program of the National GIS Project for developing ubiquitous GIS technologies under the control of the M inistry of Land, Transport and Maritime Affairs (M LTM). The first program of the KLSP, which lasts from 2006 to 2012, initiated with $132 million of national funds and $42 million of private matching funds. Aiming to develop the 'Innovation of GIS technology for ubiquitous Korean land', the KLSP consists of five core research projects and one research coordination project to practically utilize and commercialize the results of core research projects. The Korean Land Spatialization Group (KLSG) is planning the KLSP Test-Bed for testing, integrating, and exhibiting the KLSP's outcomes. About 40% of the outcomes are related products to geo-sensor and wireless sensor network (W SN). Thus, interoperable, scalable and web accessible frameworks like an OGC SWE (Open Geospatial Consortium Sensor Web Enablement) are mandatory because some of the products must be connected to each other in a KLSG Test-Bed. The main objective of this paper is to introduce the KLSP Test-Bed and the SWE SOS (Sensor Observation Service) prototype, which is developed for interoperable geo-sensor networks of the KLSP.

• Proceedings of the Korea Water Resources Association Conference
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• 2018.05a
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• pp.376-376
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• 2018

수재해 관련 정보를 수집하기 위한 주요 소스로서 위성 정보가 활용되고 있다. 본 연구에서는 그 중 NASA SEDAC과 UNISDR(United Nations International Strategy for Disaster Reduction)의 Global Risk Data Platform, UNESCO의 IHP-WINS를 대상으로 메타정보를 구축하는 [글로벌(위성기반) 수재해 관련정보 수집체계]를 구성하였다. 이때 메타정보를 수신/처리하는 역할의 하비스터는 OGC(Open Geospatial Consortium) 표준 WMS(Web Map Service)서비스의 필수 Operation인 GetCapabilities를 통하여 ISO GML을 획득한 후 이를 처리하도록 구성함으로써 여타표준 준수 DataSource에 대한 적응성을 확보하였다. 수집된 메타데이터를 통하여 검색된 정보는 표준 Map Service를 통하여 구글 지도 기반의 시계열 수재해 주제도 정보 서비스와 WebGL기반 3D 수재해 주제도 서비스로 각각 구성되도록 설계하였다. 국내 수재해 현장정보 수집 체계에 있어서는 사진을 포함한 시민의 현장 정보가 지오태깅기술과 동반되어 수재해 플랫폼으로 업로드 되면, 수집된 시계열 정보는 주제별 카테고리로 그룹화 된 후 클러스터링 가시화 기법으로 지도 공간상에 표출되도록 구성하였다. 이때 공신력 있는 공공 데이터(Data.go.kr)의 대피소 등 관련 시설 정보를 동시에 매핑하여 융합서비스 하도록 모색하였다. 본 연구는 전반적으로 웹서비스를 지향하며 전문가, 기관(부처), 교육기관으로 구분된 서비스를 구상하고 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.3
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• pp.774-780
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• 2010

USN(Ubiquitous Sensor Network) is a core infrastructure that u-life use to enable the realization in the ubiquitous society through various services of area such as u-city, u-Health. Therefore, we need a research for domestic standards to establish USN technique. Currently, status of USN standards is most standard and research that it is a technology for sensor node implementation and a protocol for energy-efficient communication and interlock with existing network. But, Standard and research for sensor network and integration management of heterogeneous sensor networks for USN application and sensing data management and USN database structure definition such as application and middleware is weak level. In this paper, we researched for standard development of domestic a sensor network and the relevant standard analysis to configure SWE(Sensor Web Enablement) of OGC(Open Geospatial Consortium) for standarded plattform technology. Also we researched that it's a connection between domestic ITA(Telecommunications Technology Association) standards and SWE Standard.

• International Journal of Contents
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• v.13 no.2
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• pp.1-5
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• 2017

Residents under hazard and disaster conditions should be evacuating to the pre-assigned nearest safety facilities, community hall, local schools, friend's houses, etc. in a safety zone, quickly as soon as possible. The small percentage of evacuees shows serious economy class syndrome after the quake, because those people are forced to a stressful dairy evacuee-life in scattered homes and/or in-vehicle, for instance. Then, we consider on supporting evacuees using heart rate variability, Geospatial Positioning System (GPS) and WiFi functions of a smartphone, and Web-server on the Internet to keep their health in good conditions.