• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.1071-1073
• /
• 2011

최근 유비쿼터스 기술이 발달함에 따라 센서 네트워크에서 다양한 하드웨어를 통하여 수집한 상황정보를 도시하는 SWE(Sensor Web Enablement)연구가 OGC(Open Geospatial Consortium)를 중심으로 진행된다. 본 논문에서 다양한 센서 네트워크로부터 실시간으로 수집되는 상황 데이터를 통합하고 처리한 정보를 웹 서비스를 통해 제공하기 위해 콘텐츠 지원 도구를 제시한다. 제시된 센서 네트워크 기반의 콘텐츠 지원 도구는 상황 데이터를 효율적으로 웹 서비스를 통해 제공할 수 있다. 이를 바탕으로 클라이언트의 요구에 따라 상황정보를 제공 할 수 있고, 센서 네트워크의 상황 데이터를 효율적으로 사용자에게 제공할 수 있을 것으로 사료된다.

• Korean Journal of Remote Sensing
• /
• v.33 no.4
• /
• pp.391-400
• /
• 2017

Geo-based application services linked with the Open Geospatial Consortium (OGC) Web Processing Service (WPS) protocol have been regarded as an important standardized framework for of digital earth building in the web environments. The WPS protocol provides interface standards for analysis functionalities within geo-spatial processing in web-based service systems. Despite its significance, there is few performance tests of WPS applications. The main motivation in this study is to perform the comparative performance test on WPS standards. Test system, which was composed of WPS servers, WPS framework, data management module, geo-based data processing module and client-sided system, was implemented by fully open source stack. In this system, two kinds of geo-based image processing functions such as cloud detection and gradient magnitude computation were applied. The performance test of different server environments of non-WPS, synchronous WPS 1.0 and asynchronous WPS 2.0 was carried out using 100 threads and 400 threads corresponds client users on a web-based application service. As the result, at 100 threads, performance of three environments was within an adjacent range in the average response time to complete the processing of each thread. At 400 threads, the application case of WPS 2.0 showed the distinguished characteristics for higher performance in the response time than the small threads cases. It is thought that WPS 2.0 contributes to settlement of without performance problems such as time delay or thread accumulation.

• Journal of the Korean Association of Geographic Information Studies
• /
• v.18 no.4
• /
• pp.119-130
• /
• 2015

In recent years, the attention on the applications of the national or international standards to water-related information technology in practice has more increased. In particular, as the demand on spatial information technology including content development, receiving, disposal and distribution has increased, the importance of standardization has been also emphasized. However, compared with attention and demand on standardization in spatial information technology, studies on development and application of standardization are still at the initial stage. Accordingly, this study attempted to investigate the trends of international standards developed and established by International Organization for Standardization(ISO) and Open Geospatial Consortium(OGC), and to derive the adaptable integrated management standard technology for water hazard information platform. For this, we investigated big data, NoSQL, and cloud technology for the observed data provision. Furthermore, OGC WxS standard technologies for spatial information web service and ISO standards for spatial information format were investigated. Based on these investigations, we examined the strategies and plans to apply and establish the standardization for information provision.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.8 no.5
• /
• pp.65-71
• /
• 2008

Recently, the research is progressing on the SWE(Sensor Web Enablement) platform of OGC(Open Geospatial Consortium) to provide the sensing data and moving pictures collected in a sensor network through the Internet Web. However, existed research does not deal with moving objects like cars, trains, ships, and person. Therefore, we present a method to deal with integrated sensing data collected by GPS device, sensor network, and image devices. Also, this paper proposes an integrated processing method for image and sensing data based on location in mobile sensor networks. Additionally, according to proposed methods, we design and implement the combine adapter. This combine adapter receives a contexts data, and provides the common interface included parsing, queueing, creating unified message function. We verity the proposed method which deal with the integrated sensing data based on combine adapter efficiently. Therefore, the research is expected to help the development of a various context information service based on location in future.

• Journal of the Korea Society of Computer and Information
• /
• v.16 no.6
• /
• pp.143-153
• /
• 2011

The goal of Ubiquitous Sensor Network(USN) environments is to provide users high quality services based on a variety of sensors. In this environment, sensor devices, sensor nodes and sensor networks are heterogeneous and have various characteristics. Therefore it is important for interoperability to define a metadata for describing USN resources. The OGC(Open Geospatial Consortium) proposes SensorML(Sensor Model Language) as a standard language for modeling sensors. However, SensorML provides a framework for describing a processing model among sensors rather than describing information of sensors. Therefore, to describe a USN metadata is not main purposes of SensorML. This paper defines a USN metadata which describes information about sensor device, sensor node, and sensor network. Also the paper proposes a method for efficiently storing and searching the USN metadata and implements a USN metadata management system based on our method. We show that our metadata management system is reasonable for managing the USN metadata through performance evaluation. Our USN metadata keeps the interoperability in USN environments because the metadata is designed on SensorML. The USN metadata management system can be used directly for a USN middleware or USN application.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2009.10a
• /
• pp.1022-1025
• /
• 2009

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

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
• /
• v.39 no.3
• /
• pp.187-201
• /
• 2021

Recently, the demand for a 3D urban spatial information infrastructure for storing, operating, and analyzing a large number of digital data produced in cities is increasing. CityGML is a 3D spatial information data standard of OGC (Open Geospatial Consortium), which has strengths in the exchange and attribute expression of city data. Cases of constructing 3D urban spatial data in CityGML format has emerged on several cities such as Singapore and New York. However, the current ecosystem for the creation and editing of CityGML data is limited in constructing CityGML data on a large scale because of lack of completeness compared to commercial programs used to construct 3D data such as sketchup or 3d max. Therefore, in this study, a method of constructing CityGML data is proposed using commercial 3D mesh data and 2D polygons that are rapidly and automatically produced through aerial LiDAR (Light Detection and Ranging) or RGB (Red Green Blue) cameras. During the data construction process, the original 3D mesh data was geometrically transformed so that each object could be expressed in various CityGML LoD (Levels of Detail), and attribute information extracted from the 2D spatial information data was used as a supplement to increase the utilization as spatial information. The 3D city features produced in this study are CityGML building, bridge, cityFurniture, road, and tunnel. Data conversion for each feature and property construction method were presented, and visualization and validation were conducted.

• Journal of Korea Spatial Information System Society
• /
• v.8 no.1 s.16
• /
• pp.77-92
• /
• 2006

This paper proposes an efficient spatial data manager for map services in mobile environment. It is designed to provide interoperability and efficient performance at once. To provide interoperability and reusability, the spatial data manager conforms to international standards such as the OpenGIS Simple Features Implementation Specification for OLE/COM, OpenGIS Geography Markup Language (GML) Encoding Specification developed by the Open Geospatial Consortium (OGC). The spatial data manger exploits physical main memory using Address Windowing Extensions supported by Microsoft Windows to manage spatial data for efficient performance by reducing time to read data from disk on user's request. The format of the spatial data in main memory is target data (GML) to reduce conversion time from source data to it. Progressive transmission is also provided to reduce latency time by representing only received partial data for mobile environment without waiting whole transmission.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2006.05a
• /
• pp.27-30
• /
• 2006

GIS 분야에서 데이터 교환의 표준으로 OGC(Open Geospatial Consortium)에서 GML(Geography Markup Language)이 제안되어 웹 어플리케이션이나 공간 데이터 교환에서 사용이 일반화 되어가고 있다. 또한, 공간 데이터를 효과적으로 수집하여 의사결정을 지원하기 위한 시스템인 공간 데이터 웨어하우스에서도 GML 데이터를 추출하여 소스 데이터로 활용하는 것이 요구되고 있다. 하지만 GML 은 반구조형식(semi-structured)의 데이터 형식을 가진다. 따라서 기존 구조적인 데이터와는 추출하는 방식이 다르므로 GML 의 특징에 맞는 공간 데이터 추출이 수행되어야 한다. 본 논문에서는 공간 데이터 웨어하우스에서 GML 기반의 공간 데이터 소스를 추출할 때, 중복되는 공간 객체를 하나의 표현으로 통합하여 효율적으로 적재하는 기법을 제안한다. 이는 GQuery를 이용하여 GML 데이터를 추출한 후, GML 스키마를 메타데이터에서 관리하는 스키마 정보와 비교하여 공간 데이터 웨어하우스에 통합된 공간 데이터를 제공하는 기법이다. 성능평가에서는 기존의 GML 데이터를 추출하는 기법과 제안기법과의 비교를 통하여 제안 기법의 기존 기법에 비해 평균적으로 약 9.95%의 성능향상을 보였다.

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