• 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.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.106-112
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• 2008

Personalization is user oriented dynamic method based on user preferences for easy access to what users want to view or get. It has become more important in mobile domain with rapid growth of wireless Internet and mobile phone market after success of web based market and therefore, it can be applied to service of spatial analysis result. In this paper, spatial analysis using user profile and notification service methods are proposed as one of personalized spatial data service methods for mobile users. A service system for spatial analysis with user profile is designed to prove possibility of spatial analysis based on user preferences and notification service is also designedto show generated output can be sent to user's mobile devices efficiently to make users informed of preferred information. Prototype system is implemented and it is applied to real estate data that has many selectable conditions by users. Information service based on user preferences can be applied to spatial data by using proposed system and it is efficient when cache module is used to shorten response time. Various user models for application domains and performance evaluation methods need to be developed in the future.

• The Journal of the Korea institute of electronic communication sciences
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• v.6 no.4
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• pp.523-531
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• 2011

Many of the wells which were constructed to use ground water resource are abandoned and not managed efficiently after its use. And a variety of heavy metals and organic compounds are released from the abandoned wells and this can cause ground water pollution. Therefore in this paper implemented to monitor locational information drill holes and underground water sensing information on real time basis using u-GIS environment to combined ubiquitous sensor node and GIS technology to improve these problems. In addition, this system suggests using system by UML 2.0 by analyzing variety requirement of user and between system internal modules interaction and data flow. It provides graphical user interfaces (GUI) to system users to monitor water-well related property information and its managements for each water-well at remote site by variety platform by GIS map and web environment and mobile device based on smart phone.

• Spatial Information Research
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• v.19 no.3
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• pp.43-52
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• 2011

Recently, interest in location-based service (LBS) which utilizes a DBMS in mobile system environment has been increasing, and it is expected to overcome the existing file-based system's limitation in advanced in-vehicle system by utilizing DBMS's advantages such as efficient storage, transaction management, modelling and spatial queries etc. In particular, the road network data corresponds to the most essential domain in a route planning system, which needs efficient management and maintenance. Accordingly, this study aims to develop an efficient graph-based geodata model for topological network data and to support dynamic path computation algorithm based on heuristic approach in mobile LBS system. To achieve this goal, we design a data model for supporting the hierarchy of network, and implement a path planning system to evaluate its performance in mobile LBS system. Last but not least, we find out that the designed path computation algorithm with hierarchical graph model reduced the number of nodes used for finding and improved the efficiency of memory.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.36 no.3
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• pp.177-184
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• 2018

In case that limited resources can be mobilized, non-structural countermeasures such as 'monitoring using Information and Communication Technology might be one of solutions to mitigate disaster risks. Having established the monitoring system, operational and maintenance costs to maximize the effectiveness might trouble the authority concerned or duty attendant who is in charge. In this respect, "Guerrilla Sensor" would be very cost effective because of the inherent mobility characteristic. The sensor device with the IRIS camera and GPS (Global Positioning System) equipped, is basically battery-operated and communicates with WCDMA (Wideband Code Division Multiple Access). It has a strong advantage of capabilities for 'Disaster Response' with immediate and prompt action on the spot, making the best use of IoT (Internet of Things), especially with the mobile web. This paper will explain how the sensor system works in real-time GIS (Geographic Information System) pinpointing the exact location of the abnormal movement/ground displacement and notifying the registered users via SMS (Short Message Service). Real time monitoring with early warning and evaluation of current situations with LBS (Location Based Service), live image and data information can help to reduce the disaster impact. Installation of Guerrilla sensor for a real site application at Gimcheon, South Korea is also reported.

• 한국공간정보시스템학회:학술대회논문집
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• 2004.12a
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• pp.39-44
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• 2004

우리나라는 매년 수천억에서 수조원에 이르는 수해피해가 발생하고 있다. 특히, 국가 교통의 중추인 도로 수해로 인한 사회 경제적 손실이 매우 큰 실정이다. 간선도로에서의 수해발생시 최단시간 내에 수해 위치와 피해 현황 등을 파악하고 이에 대한 응급복구 및 관리가 필요하고, 수해발생 특성상 전국적으로 산재하여 나타나는 피해 지역에 대한 현황을 효과적으로 파악할 수 있는 시스템이 필요하나 아직까지 이러한 시스템은 지원되지 못하고 있다. 이에 본 연구에서는 기존에 각 지역별로 이루어진 문서기반의 수해복구 관리에서 벗어나 웹 GIS 및 모바일 기술을 이용하여 전국 간선도로망의 수해피해 및 복구현황을 총괄 관리할 수 있는 시스템을 개발하고자 하였다. 이를 위해 첫째, 국내 간선도로 수해관련 현황조사 및 도로재해 관련 국외 현황 분석을 실시하고, 수해복구 업무분석을 통해 문제점을 파악하였다. 둘째, 수해복구업무를 담당하고 있는 국도유지관리사무소의 방문조사 및 업무분석을 통해 수해현장 지원을 위한 Mobile 지원시스템 구축 방안을 도출하고, 전국적인 도로수해관리를 위한 Web기반 관리시스템 구축 방안을 제시하였다. 셋째, 업무분석 결과에 대해 정형화 표준화하여 수해복구업무 표준안을 제시하고, Mobile 지워 시스템 및 Web 관제 시스템을 시범 구축하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.07b
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• pp.196-198
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• 2005

최근 GIS는 털러 분야에서 다양하게 운용되고 있다 최근에는 인터넷을 통한 정보 시스템의 요구가 급증하고 있으며, 웹 환경에서의 지리정보의 공유로 활용방안에 대한 연구가 활발히 이루어지고 있다. 특히, 지리정보의 활용을 위해 웹 지도 서비스의 요구가 증대되고 있다. 이를 위해 OGC(Open GIS Consortium)에서는 WMS(Web Map Service) 명세를 제시하고 있다. 그러나, 현재 제시되고 있는 WMS 명세만으로는 최근 발전하고 있는 모바일 환경에서의 적용이 어렵기 때문에 WMS의 인터페이스의 확장이 필요하다. WMS 확장을 위해 본 논문에서는 기존의 WMS를 분석하고 이를 바탕으로 모바일 환경에 적합한 WMS 확장 인터페이스의 방안을 제시한다. 또한, 확장 인터페이스를 바탕으로 모바일 환경을 위한 WMS 구조를 설계하고 개발한다. 본 논문에서 제안하는 WMS의 확장 인터페이스 및 이를 기반으로 하는 WMS 구조는 사용자들의 요구에 적합한 WMS 개발에 기초 자료로 사용될 것으로 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.979-980
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• 2010

최근 들어 삶의 질 향상과 고령사회로의 진입으로 건강 및 운동 관리에 대한 관심이 고조되고 있다. 이는 정해진 시간, 정해진 장소에서만 운동을 하는 것이 아니라 일상생활에서도 자연스럽게 운동을 하고 건강을 관리하고자하는 욕구를 발생시켰다. 또한, 모바일 이동통신 서비스와 모바일 콘텐츠 시장의 계속적인 성장으로 모바일 기기에서 쉽게 사용가능한 건강 콘텐츠의 필요성이 증대되고 있다. 본 논문에서는 개인의 건강정보, 생체정보를 통해 관광, 일상생활 등 언제 어디서든 모바일 폰을 통해 다양한 운동 콘텐츠를 제공받고 맞춤형 건강관리 서비스를 받을 수 있는 모바일 웹 기반의 자가 운동관리 시스템을 설계하고자 한다. 이를 위해 건강관리를 위한 생체신호 데이터 모듈, 운동 관리 및 기록 모듈, 운동 결과 분석 및 리포트 제공 모듈, 모바일 웹 표준을 지킨 인터페이스를 설계한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.37 no.1
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• pp.195-201
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• 2017

Urbanization and industrialization have led to a severe deterioration in urban air qualities. As an air pollution is closely associated with human health, citizen has a growing concern about the air quality policy to improve their residential environment. Due to the recently advance in web- and mobile computing technologies, citizens can easily access various air quality information and public authorities utilize the social media service to communicate citizens with air quality issues. Also citizens' participation and role has been increased to improve urban air qualities. Thus, to meet the technical and societal changes, a GIS-based air quality information system is developed based upon the Ubiquitous Public Access (UPA) model in ISO19154. The proposed system employs the context information model to provide air quality information depending on citizens' health conditions and locations. Also, citizens can present their perceptions of an air quality at their current location Public authorities can thus utilize the citizens' perceptions when establishing new air quality policies.

• Journal of Korean Society for Geospatial Information Science
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• v.19 no.3
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• pp.13-21
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• 2011

In mobile environment supporting mobility technologies, user requirements have been increased with respect to utilization of location information. In particular, moving object DBMS has consistently posed in order to efficiently maintain traffic information related to location of vehicle which tents to tremendously change over time. Despite the fact that these sorts of researches must be taken into consideration, empirical studies on moving object in terms of map database for lbs service, spatial attribute of which is continuously changed over time, have rarely performed. Therefore, aim of this paper is to suggest efficient spatial index scheme, which is capable of supporting query processing algorithm and location of moving object over time, by developing new empirical model. As a result, we can come to the conclusion that moving object model based on multi-fixed grid index makes it possible to cut down on the number of entity for retrieving. What's more, this model enables hierarchical data to be accessed through efficient spatial filtering on large-scale lbs data and constraints in accordance with level in order to display map.