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우리나라와 일본의 국가 GIS 추진전략 및 유비쿼터스 정책 비교분석
서용철(Suh Yong Cheol),사공호상(Sakong Ho Sang),이영주(Lee Young Joo) 대한공간정보학회 2008 대한공간정보학회지 Vol.16 No.2
오늘날 정보화는 디지털 환경에서 유비쿼터스 정보환경으로 발전하고 있다. 이러한 정보환경의 변화에 효과적으로 대응하기 위해서 정부는 유비쿼터스 기술을 이용하여 국가발전을 추구하고자 u-Korea 정책을 추진하고 있다. 한편, 국가의 공간정보화의 기틀인 국가GIS 역시 유비쿼터스 환경으로의 발전을 모색하고 있다. 그러나 아직까지 유비쿼터스 정보환경에 대한 뚜렷한 변화와 관련기술의 실용화는 나타나지 않고 있는 실정이다. 본 연구는 ‘유비쿼터스’라는 정보환경의 변화에 직면한 국가GIS 정책 방향을 모색하기 위해 우리나라와 일본의 유비쿼터스 정책 및 국가GIS 추진전략을 상호 비교하여 각 분야별 시사점을 도출하였다. Informatization today has been developed in a ubiquitous environment unifying real and virtual space from digital space. To reflect on this trend, the government has promoted the u-Korea Project, which is a national strategy based on ubiquitous technology. With this national informatization policy, ‘The Creation of the Infrastructure for Realization of Ubiquitous Country’ for establishing a ubiquitous world is presented in the 3rd National Geographic Information System (NGIS) Master Plan, which manages national spatial information. However, we have not yet discovered distinct change for ubiquitous environments and practical technologies. The purpose of the study is to explain the current status of Ubiquitous policies and National GIS policies as a representative national information strategies directed toward the ubiquitous society by comparing Korea and Japan, and then develops improved strategies for the future.
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실내 환경에서의 3차원 공간데이터 취득을 위한 IMU, Laser Scanner, CCD 센서의 통합
서용철 ( Yong Cheol Suh ),장정정언 ( Masahiko Nagai ) 한국지리정보학회 2007 한국지리정보학회지 Vol.10 No.1
3D data are in great demand for pedestrian navigation recently. For pedestrian navigation, we needs to reconstruct 3D model in detail from people`s eye. In order to present spatial features in detail for pedestrian navigation, it is indispensable to develop 3D model not only in outdoor environment but also in indoor environment such as underground shopping complex. However, it is very difficult to acquire 3D data efficiently by mobile mapping without GPS. In this research, 3D shape was acquired by Laser scanner, and texture by CCD(Charge Coupled Device) sensor. Continuous changes position and attitude of sensors were measured by IMU(Inertial Measurement Unit). Moreover, IMU was corrected by relative orientation of CCD images without GPS(Global Positioning System). In conclusion, Reliable, quick, and handy method for acquiring 3D data for indoor environment is proposed by a combination of a digital camera and a laser scanner with IMU.
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서용철 ( Yong Cheol Suh ) 한국지리정보학회 2004 한국지리정보학회지 Vol.7 No.3
This research focuses on the development of a fast datum transformation model to be used in GIS that utilizes real-time data transformation. Instance, when a GIS data constructed according to a datum is conformed to another datum, instead of transforming the axes of the original data, the data is transformed right before the results are reflected on the monitor. In this research, the prospects of calculating transformation parameters for every grid cells on the area based on two-dimensional conformal transformation model in order to decrease real-time datum transformation time while maintaining a high accuracy has been investigated. Research results showed that for a fixed area, the accuracies of the two-dimensional conformal transformation and the three-dimensional datum transformation, which requires more computing time, were almost equal and fast transformation speed, high accuracy real-time datum transformation is made feasible by implementing the grid-divided two-dimensional conformal transformation model.
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황초희,서용철,Hwang. Cho-Hee,Suh. Yong-Cheol 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1
The purpose of this research is to demonstrate the propriety of the locations of the Jigudea(police boxes) through time and spatial analysis. The study area was limited to BusanJingu of Busan city which includes Seo-myeon district; the biggest downtown in Busan city. In this case, monthly crime position occurrence number of times by time analysis, criminal occurrence number of times and the position have some similarities. In case of Jigudea(police boxes) which handle crime, throngs were piled up. The other case of position which crime, there is no Jigudea(police boxes) in group or two were situated. As a result, it is required that Jigudea(police boxes) in Jin-gu should be rearranged and relocated properly.
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박지혜,서용철,PARK, Ji-Hye,SUH, Yong-Cheol 한국지리정보학회 2017 한국지리정보학회지 Vol.20 No.3
Due to urban growth and increasing population density, many large cities contain building forests. Moreover, due to increasing demands for pleasant residential environments, there is growing concern over the encroachment of sunshine. Although research on related laws and other related fields is emerging, there is a limit to the extent to which the public can easily determine the amount of sunshine per building without referral to specialized agencies. Therefore, in this study, the duration of sunshine per building object was calculated via a simulation of urban shaded area using a spatial information open platform application programming interface. The study area was the'L'apartment complex located in the new city, Haeundae, Busan, China. To perform the duration of sunshine simulation for three-dimensional urban spatial objects, the building height was extracted from pre-built three-dimensional spatial information data, and the position of the sun was determined from calculations of the altitude and azimuth of the sun. This study provides a more precise and easier method of judging whether sunshine is impeded from reaching buildings by quantitatively analyzing sunshine and classifying the total duration of sunshine and the continuous duration of sunshine on each object.
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구글어스와 공간데이터베이스를 이용한 웹기반 지리정보 표출시스템 개발
임우혁,이양원,서용철,Im, Woo-Hyuk,Lee, Yang-Won,Suh, Yong-Cheol 대한공간정보학회 2010 한국공간정보학회지 Vol.18 No.4
One of recent trends in Web-based GIS is the system development using FOSS (Free and Open Source Software). Open Source software is independent from the technologies of commercial software and can increase the reusability and extensibility of existing systems. In this study, we developed a Web-based GIS for interactive visualization of geographic information using Google Earth and spatial DBMS(database management system). Google Earth Plug-in and Google Earth API(application programming interface) were used to embed a geo-browser in the Web browser. In order to integrate the Google Earth with a spatial DBMS, we implemented a KML(Keyhole Markup Language) generator for transmitting server-side data according to user's query and converting the data to a variety of KML for geovisualization on the Web. Our prototype system was tested using time-series of LAI(leaf area index), forest map, and crop yield statistics. The demonstration included the geovisualization of raster and vector data in the form of an animated map and a 3-D choropleth map. We anticipate our KML generator and system framework will be extended to a more comprehensive geospatial analysis system on the Web.
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고해상도 항공라이다 DEM 해석을 통한 강원도 일원의 산사태 예측 가능성 분석
이동하,김영섭,서용철,Lee, Dong-Ha,Kim, Young-Seup,Suh, Yong-Cheol 대한공간정보학회 2009 한국공간정보학회지 Vol.17 No.3
본 연구에서는 항공라이다 측량을 통해 생성된 고해상도 DEM을 산사태 발생 가능성 예측을 위한 객관적인 판단근거로 활용하고자 하였다. 이를 위해 산사태가 발생하지 않은 1개의 사면과 3개의 산사태 발생지역에 대하여 항공레이저 측량데이터에서 얻어진 2m 간격의 DEM을 이용하여 지형해석을 수행하였다. 해석요소에는 경사면 구배와 고유치 비(eigenvalue ratio)를 이용하였으며, 발생한 산사태의 피해현황 파악을 위해 한국도로공사에서 수행한 현장조사 자료를 활용하였다. 고해상도 DEM을 이용한 산사태 발생 가능성 분석 결과, 산사태 발생이 가능한 지형의 특징적인 해석값의 밀도분포가 명확해졌으며, 이러한 밀도분포를 통해 산사태의 발생 예측 및 현재 위험도의 표현이 가능함을 알 수 있었다.
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