• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.52-55
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• 2006

It's used to be said that tsunami is a rare event. The recurrence time of tsunami in Sumatra area is approximately 230 years as CalTech Research Group‘s study from paleocoral. However, the tsunami occurred in Indian Ocean on 26 December 2004, 28 March 2005 and 17 July 2006, because the earthquakes still release the energy. To cope with the tsunami disaster, we have to put the much effort on better disaster preparedness. The Tsunami Reduction Of Impacts through three Key Actions (TROIKA) was suggested by Eddie N. Bernard, the director of NOAA/PMEL (Pacific Marine Environmental Laboratory). They are Hazard Assessment, Mitigation and Warning Guidance. The satellite remote sensing has potential on these actions. The medium and high resolution satellite data were used to assess the degree of damage at the six-damaged provinces on the Andaman seacoast of Thailand. Fast and reliable interpretation of the damage by remote sensing method can be used for inundation mapping, rehabilitation and housing plans for the victims. For tsunami mitigation, the satellite data can be used with GIS to construct the evacuation map (evacuation route and refuge site) and coastal zone management. It is also helpful for educational program for local residents and school systems. Tsunami is a kind of ocean wave, therefore any satellite sensors such as SAR, Altimeter, MODIS, Landsat, SPOT, IKONOS can detect the tsunami wave in 2004. The satellite images have shown the characteristics of tsunami wave approaching the coast. For warning, satellite data has potential for early warning to detect the tsunami wave in deep ocean, if there are enough satellite constellation to monitor and detect the first tsunami wave like the pressure gauge, seismograph and tide gauge with the DART buoy can do. Moreover, the new methods should be developed to analyse the satellite data more faster for early warning procedure.

• 융합정보논문지
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• 제10권10호
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• pp.123-127
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• 2020

야간 중대형 산불의 전체적인 화선정보를 얻기 위하여 누락되는 산불에 대한 반복적인 임무비행과 임무수행 종료 후 획득되는 정사영상 정합에 대한 소요시간을 줄이기 위하여 실시간 동영상으로 산불발생 여부를 판단하고 드론의 위치와 영상카메라의 각도정보, 지도상의 고도정보를 활용하여 판단된 산불위치를 계산하여 지도에 도시할 수 있는 지상통제시스템을 개발하였다. 개발된 기능의 신뢰성을 검증하기 위하여 비행고도 별, 영상카메라의 지향하는 위치정보의 오차거리를 측정하였으며, 신뢰할 수 있는 범위내의 위치정보를 지도에 표시하였다. 본 논문에 개발된 기능으로 다수의 산불 발생위치를 실시간 식별이 가능하므로 산불 진화대책 수립을 위한 전체적인 화선정보를 보다 신속하게 획득할 수 있을 것으로 예상된다.

• 대한교통학회지
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• 제26권5호
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• pp.7-16
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• 2008

본 연구는 그동안 여객보다 상대적으로 소홀히 되어온 화물통행의 행태분석을 통행사슬관점에서 분석하였다. 화물자동차 통행분석에 대한 운행특성 지표들은 공간 및 통행패턴별로 설명되지 못하였음을 지적하고, 2005년 수행된 제3차 전국물류현황조사 자료를 이용하여 실증분석 하였다. 전체 분석대상 화물자동차는 약 13,000대 이었으며 화물자동차의 통행일지 자료를 도면위에 맵핑을 통하여 통행사슬을 새롭게 분류하였다. 또한 약 13,000대의 화물자동차에 대한 물리적 특성지표 및 운행효율성지표를 산정하고 앞서 정의한 통행사슬과 연관지어 분석하였다. 분석 결과 영업용 화물자동차가 자가용 화물자동차보다 다소 우위에 있는 것으로 분석되었다. 물리적 지표에서 공간적으로 볼 때, 도시내와 광역권은 비슷하고 지역간은 통행거리와 통행시간이 길게 나타남을 알 수 있다. 운행효율성 지표는 지역간, 지역내 및 광역 권에서 자가용 화물자동차보다 영업용 화물자동차의 효율성이 약간 높은 것인 것으로 분석되었나 단순 왕복 및 복잡정도에 따라서는 큰 차이가 없음을 알 수 있었다. 영업용 화물자동차의 경우, 적재능력이 높을수록 효율성이 높게 나타남을 알 수 있었다.

• Spatial Information Research
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• 제9권1호
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• pp.1-13
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• 2001

위성영상을 이용하여 지형도를 제작하는 새로운 방법으로 레이다 간섭기법에 관한 연구가 활발히 진행되고 있다. 레이다 간섭기법은 동일한 지역을 촬영한 두 장의 SAR 영상의 위상정보를 이용하여 표고값을 추출하는 기법으로, 기존의 SPOT과 같은 광학영상에 비하여 날씨나 시간의 제약을 받지 않고 지형정보를 얻을 수 있다는 장점을 가지고 있다. 즉, 영상취득의 유연성이 뛰어나며 광범위한 면적에 대하여 저렴한 표고데이터 추출이 가능하여 GIS에서의 활용 가능성 또한 밝다고 할 수 있다. 그러나 레이다 간섭기법은 SAR 시스템에 따라 발생하는 기하학적 왜곡으로 인해 일부지역에 대해서는 위상불구속화 알고리즘에 따라 표고값이 잘못 추정되거나 아예 그값을 얻지 못하는 단점을 가지고 있다. 본 연구에서 사용한 ERS 텐덤자료의 경우에는 산악지형에서의 수직위치 정확도가 가장 부정확했으며, 기하학적 왜곡으로는 ERS 위성의 짧은 입사각으로 인한 layover 현상이 주로 발행하였다. 위상불고속화 기법별로는 경로추적방식 알고리즘을 사용했을 경우, 산출된 표고값의 정확도는 최소제곱방식을 수행했을 경우보다 2∼5m 가량 우수하였으나 기하학적 왜곡이 발생한 지역에서의 데이터를 얻지 못하는 결과를 보였다. 이 지역에 대하여 고도민감도를 이용하여 표고값을 추정한 결과 경로추적방식의 정확도를 유지하면서 전체 영상에 대하여 표고값을 갖는 DEM을 제작할 수 있었다.

• Asian Pacific Journal of Cancer Prevention
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• 제16권13호
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• pp.5225-5231
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• 2015

Background: One of the most prevalent cancers in whole world is skin cancer and its prevalence is growing. The present research sought to estimate relative risk of morbidity and mortality due to skin cancer. Materials and Methods: In this cross-sectional study. The required data were gathered from the registered cancer reports of Cancer Control Office in the Center for Non Communicable Disease of the Iranian Ministry of Health (MOH). The data were extracted at province level in the time span of 2008-10. WINBUGS software was used to analyze the data and to identify high risk regions. ArcGIS10 was utilized to map the distribution of skin cancer and to demonstrate high risk provinces by using classic and fully Bayesian models taking into account spatial correlations of adjacent regions separately for men and women. Results: Relative risk of morbidity for women in Yazd and for men in Kurdistan and relative risk of mortality for women in Bushehr and for men in Kohgiluyeh were found to be the highest. Bayesian model due to regarding adjacent regions correlation, have precise estimation in comparing to classical model. More frequent epidemiological studies to enact skin cancer prevention programs. Conclusions: High risk regions in Iran include central and highland regions. Therefore it is suggested that health decision makers enact public education, using anti UV creams and sunglasses for those parts as a short preventing program.

• 한국측량학회지
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• 제12권2호
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• pp.187-197
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• 1994

본 연구는 상수도시시설물관리 정보체계를 개발함에 있어서, 워크스테이션을 기반으로 하는 외국의 값비싼 소프트웨어를 사용하지 않고, 한국의 상수도업무특성에 적합하고 쉽게 사용할 수 있으며 개인용컴퓨터를 사용하는 소프트웨어를 직접 개발하기 위하여 수행되었다. 업무분석의 결과, 상수도정보체계는 경영정보체계, 송배수운용시스템, 관로관리시스템 등으로 구성되며, 현재 한국에서 업무자동화가 이뤄질 수 있는 부분은 관로관리시스템으로 판단하여, 대상업무로서 관로관리 및 누수관리를 위한 자료관리를 선정하였다. 이를 구현하기 위해 시스템을 독자적으로 설계, 개발하였으며, 객체지향프로그래밍기법을 이용 소프트웨어를 개발하였다. 본 연구에서 개발된 상수도시설물관리정보체계를 시험하기 위하여, 강남구 논현동 사례지역에 적용한 결과, 실용적으로 사용할 수 있으며, 업무능률향상에 효과가 있다고 판단되었다.

• Korean Journal of Geomatics
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• 제2권2호
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• pp.123-130
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• 2002

LiDAR (Light Detection And Ranging) system has a profound impact on geoinformatics. The laser mapping system is now recognized as being a viable system to produce the digital surface model rapidly and efficiently. Indeed the number of its applications and users has grown at a surprising rate in recent years. Interest is now focused on the reconstruction of buildings in urban areas from LiDAR data. Although with present technology objects can be extracted and reconstructed automatically using LiDAR data, the quality issue of the results is still major concern in terms of geometric accuracy. It would be enormously beneficial to the geoinformatics industry if geometrically accurate modeling of topographic surface including man-made objects could be produced automatically. The objectives of this study are to reconstruct buildings using airborne LiDAR data and to evaluate accuracy of the result. In these regards, firstly systematic errors involved with ALS (Airborne Laser Scanning) system are introduced. Secondly, the overall LiDAR data quality was estimated based on the ground check points, then classifying the laser points was performed. In this study, buildings were reconstructed from the classified as building laser point clouds. The most likely planar surfaces were estimated by the least-square method using the laser points classified as being planes. Intersecting lines of the planes were then computed and these were defined as the building boundaries. Finally, quality of the reconstructed building was evaluated.

• Asian Journal of Atmospheric Environment
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• 제2권1호
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• pp.34-46
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• 2008

Emissions inputs for use in air quality modeling of Korea were generated with the emissions inventory data from the National Institute of Environmental Research (NIER), maintained under the Clean Air Policy Support System (CAPSS) database. Source Classification Codes (SCC) in the Korea emissions inventory were adapted to use with the U.S. EPA's Sparse Matrix Operator Kernel Emissions (SMOKE) by finding the best-matching SMOKE default SCCs for the chemical speciation and temporal allocation. A set of 19 surrogate spatial allocation factors for South Korea were developed utilizing the Multi-scale Integrated Modeling System (MIMS) Spatial Allocator and Korean GIS databases. The mobile and area source emissions data, after temporal allocation, show typical sinusoidal diurnal variations with high peaks during daytime, while point source emissions show weak diurnal variations. The model-ready emissions are speciated for the carbon bond version 4 (CB-4) chemical mechanism. Volatile organic carbon (VOC) emissions from painting related industries in area source category significantly contribute to TOL (Toluene) and XYL (Xylene) emissions. ETH (Ethylene) emissions are largely contributed from point industrial incineration facilities and various mobile sources. On the other hand, a large portion of OLE (Olefin) emissions are speciated from mobile sources in addition to those contributed by the polypropylene industry in point source. It was found that FORM (Formaldehyde) is mostly emitted from petroleum industry and heavy duty diesel vehicles. Chemical speciation of PM2.5 emissions shows that PEC (primary fine elemental carbon) and POA (primary fine organic aerosol) are the most abundant species from diesel and gasoline vehicles. To reduce uncertainties in processing the Korea emission inventory due to the mapping of Korean SCCs to those of U.S., it would be practical to develop and use domestic source profiles for the top 10 SCCs for area and point sources and top 5 SCCs for on-road mobile sources when VOC emissions from the sources are more than 90% of the total.

• 가정과삶의질연구
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• 제31권3호
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• pp.63-79
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• 2013

The aim of this study was to investigate the influence of family-friendly community policy and child care policy on parents with young children. Particularly, two specific questions were addressed: 1) Were there differences in the perception of community family-friendliness among parents with young children in Seoul provinces? 2) Were there differences in the perception of community family-friendliness among parents with young children, depending on child-care infrastructures in Seoul provinces? Data for this study were drawn from multiple sources. Individual-level indicators were drawn from the survey of 1,246 parents with children under age 6 in Seoul. Community-level indicators were drawn from the 2011 Seoul census data. Frequency, descriptive statistics, GIS mapping, and hierarchical linear model analysis were conducted to examine the perception of community family-friendliness by individual, child-care infrastructures, and the community at large. The major results of the present study are as follows: The perception of parents on community family-friendliness varied across the 25 provinces in Seoul. The perception of community family-friendliness was positively related with the total number of child day-care centers, and the number of infant-toddler child daycare centers. The number of accredited child daycare centers was negatively associated with the perception of community family-friendliness.

• 한국농림기상학회지
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• 제4권3호
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• pp.133-140
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• 2002

Site-specific minimum temperature forecasts are critical in a short-term decision making procedure for preventive measures as well as a long-term strategy such as site selection in fruits industry. Nocturnal cold air pools frequently termed in mountainous areas under anticyclonic systems are very dangerous to the flowering buds in spring over Korea, but the spatial resolution to detect them exceeds the current weather forecast scale. To supplement the insufficient spatial resolution of official forecasts, we developed a GIS - assisted frost risk assesment scheme for using in mountainous areas. Daily minimum temperature data were obtained from 6 sites located in a 2.1 by 2.1 km area with complex topography near the southern edge of Sobaek mountains during radiative cooling nights in spring 2001. A digital elevation model with a 10 m spatial resolution was prepared for the entire study area and the cold air inflow was simulated for each grid cell by counting the number of surrounding cells coming into the processing cell. Primitive temperature surfaces were prepared for the corresponding dates by interpolating the Korea Meteorological Administration's automated observational data with the lapse rate correction. The cell temperature values corresponding to the 6 observation sites were extracted from the primitive temperature surface, and subtracted from the observed values to obtain the estimation error. The errors were regressed to the flow accumulation at the corresponding cells, delineating a statistically significant relationship. When we applied this relationship to the primitive temperature surfaces of frost nights during April 2002, there was a good agreement with the observations, showing a feasibility of site-specific frost warning system development in mountainous areas.