• Journal of the Korea Society of Computer and Information
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• v.17 no.12
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• pp.199-207
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• 2012

In this paper, we designed and implemented path search system using GPS information in photo. The system extracts EXIF information included in a photo to get path information and performs path search by applying the shortest path algorithm with the use of GPS information out of information, which was extracted in this way. And then it shows the obtained path information on web by utilizing Yahoo Map API. For this, the system is designed using a method of extracting location information in a photo and path sorting through applying the shortest path algorithm. UI(User Interface) was implemented using Yahoo Map API. Based on that, we implemented path search service using photo file that is included GPS information.

• The Journal of Korea Robotics Society
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• v.4 no.1
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• pp.74-80
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• 2009

This paper presents a remote monitoring and simulation system for a building cleaning mobile robot. It provides a tool of convenient 3D graphical map construction including network camera image viewer and status information of the robot. The 3D map is reconstructed from existing 2D building CAD data with DXF format using OpenGL graphic API. Through this system, it is possible to monitor and control the cleaning mobile robot from remote place. A practical experiment is performed to show the reliability and convenience of the monitoring system. The proposed system is expected to give efficient way of control and monitoring to building cleaning mobile robot.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.5
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• pp.960-966
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• 2012

It is prevalent to gather the location information from GPS, WiFi and etc, and therefore LBSNS (Location-Based SNS) has increased rapidly (such as location-augmented Twitter services). The message created from LBSNS include the specific area of interests which the message is created in or mentions. It is easy to propagate the location-based information of LBSNS by adapting the retweet function which is efficient way to propagate the message in tweeter. In this paper, we have defined the smart retweet as a automatic retweet function for efficient propagating the messages which is geo-tagging the location of interests. We have designed the smart retweet system based on the tweeter system. The user could specify the area of interests and build the social networking among the users which have interested in common area. The smart retweet system have been implemented by mesh-up services based on Open-API of trweeter and google map. It is expected that the smart retweet service proposed in this paper makes easy sharing of the location-based interesting information.

• Journal of Korea Spatial Information System Society
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• v.11 no.1
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• pp.17-24
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• 2009

Recently many of earlier GIS services are changing to the form of user-participated dynamic geoweb service like many new impressive web 2.0 services substitute for earlier old-fashioned web 1.0 services. Many relevant technologies are necessary to be developed so as to integrate a number of geospatial data and functions all around into the useful geoweb services. It is also necessary to make the integration easy and to cope with the rapid changes in geoweb environment. In this study, the trend of relevant geoweb technologies were reviewed before, and the development of open geospatial service platform were carried out. As a result, open 2D/3D map service engine, user-participated mashup engine, Open API search engine and so on were im plemented as the core components of that platform. The platform will be able to be used as the common platform among a number of applications in the fields such as public/private GIS integration, u-city projects and GIS/LBS services etc.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.727-730
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• 2019

본 연구에서는 시맨틱 기반의 상호운용성을 지원하는 Fiesta IoT 온톨로지 모델을 기반으로 Protégé에서 새로운 온톨로지를 추가하여 모델링을 하였다. 이를 통해 KT IoTMakers에서 Open API를 통해 받은 JSON 형태의 데이터를 Jena 프레임워크를 이용하여 RDF 데이터로 변환하였다. 또한, 변환된 RDF 데이터를 Fuseki 서버로 전송하여 저장했으며, SPARQL 질의를 통한 결과를 Daum Map API를 사용하여 웹으로 표현하였다. 이를 통해 사람들이 시맨틱 IoT 매쉬업 서비스를 쉽게 접근할 수 있는 기회를 제공하여 다양한 응용 가능성을 가진다.

• KIPS Transactions on Software and Data Engineering
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• v.6 no.12
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• pp.581-586
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• 2017

This paper proposes a GPU based water surface animation and rendering technique for interactive applications such as games. On the water surface, a lot of physical phenomenon occurs including reflection and refraction depending on the viewing direction. When we represent the water surface, not only showing them in real time, but also make them adjusted automatically. In our implementation, we are able to capture the reflection and refraction through render-to-texture technique and then modify the texture coordinates for applying separate DU/DV map. Also, we make the amount of ratio between reflection and refraction change automatically based on Fresnel formula. All proposed method are implemented using OpenGL 3D graphics API.

• Proceedings of the Korean Society of Computer Information Conference
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• 2022.01a
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• pp.237-238
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• 2022

본 연구에서는 언택트 시대에 여행 트렌드가 된 차박을 위한 모바일 앱 'GO차박'을 설계하고 구현하였다. 코로나 19로 인해 언택트 문화가 새로운 트렌드로 자리 잡게 되면서 '차박'에 대한 관심이 급격하게 증가하게 되었다. 이에 따라 차박에 대한 정보를 찾는 수요자와 정보는 증가하였으나 방대한 정보에 대한 용이한 접근을 제공하고 증가하는 수요자를 만족시킬 수 있는 어플리케이션은 미흡하였다. 따라서 본 연구에서는 많은 차박 수요자들에게 쉽게 접근하여 차박에 대한 정보를 종합적이고 간편하게 찾아볼 수 있고 서로 정보 공유도 할 수 있는 모바일 앱을 제공하고자 'GO차박'을 개발하게 되었다. 방대한 정보를 다루기 때문에 깔끔한 UI를 구성하였고 Firebase와 NaverSearch API, Naver Map API, OpenWeatherAPI를 사용하여 정보의 정확도를 높이고자 하였다. 본문에서는 차박 앱에 대한 주요 기능들을 설명하고 결론에서는 'GO차박'의 기대 효과와 향후 확장 방향에 대해 제시하고 있다.

• Proceedings of the Korean Information Science Society Conference
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• 2008.06d
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• pp.466-469
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• 2008

본 논문에서는 지도기반의 모바일 영업 자동화 시스템(MMSFA)에 관해서 기술한다. 지도기반의 모바일 영업 자동화 시스템(MMSFA)은 영업사원들에게 이동 중에도 업무처리를 할 수 있는 유비쿼터스 업무 환경을 제공해준다. MMSFA는 사무실의 PC나 이동 중 개인무선단말기(PDA)를 통해 사용할 수 있으며, 고객과 영업활동의 입체적인 관리를 위하여 사용자의 요구와 상황에 맞춰 지도정보를 제공한다. 유비쿼터스 환경을 위해 가장 보편적이고 접근성이 뛰어난 모바일 웹을 기반으로 개발하였으며, 개발의 효율성을 위하여 웹2.0 기반 기술인 Ajax와 Naver Map OpenAPI 서비스를 활용하였다.

• The Journal of Korea Robotics Society
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• v.5 no.3
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• pp.209-215
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• 2010

This paper presents a graphic user interface system consisting of graphic simulator and remote control system for a building cleaning robot. It provides a tool of convenient 3D graphical map construction for real world. The 3D map is reconstructed from existing 2D building CAD data with DXF format by using OpenGL graphic API. Through this system, graphic display of robot's status information, remote control and cleaning scheduling can be done for a building cleaning robot. This proposed system is expected to give efficient way of graphic simulation and remote monitoring and control system for a building cleaning robot.

• Journal of Environmental Impact Assessment
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• v.20 no.4
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• pp.489-496
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• 2011

The water pollution such as oil spill from stream and river because of car accidents have been frequent cases in the watershed of Dam. However we don't have any simulation methods about flow modeling on the watershed and stream tree. In this study aims to analyze water pollution accidents area on impact range for ANDONG-Dam. The focused watershed and the risk range of path analysis model was designed by GIS database. The frequency of transportation accidents which may occur from road accidents in the level of quantitative and qualitative analysis to map flow analysis using ArcHydro Model and Open Geospatial Consortium(OGC) API. and the path way from the accident point to the reservoir stayed on the path was simulated. The area of risk accessment index was displayed with cell and grid of dam area.