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RISS 인기검색어
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- 저자 : 최석근(Choi Seok Keun) (검색결과 129 건)
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해안사구 변화 모니터링을 위한 시계열 UAV DEM 표고보정
최석근(Choi, Seok-Keun),이승기(Lee, Soung-Ki),최도연(Choi, Do-Yeon),임희창(Lim, Heechang) 한국측량학회 2023 한국측량학회지 Vol.41 No.6
Due to climate change and coastal development, significant transformations in coastal dunes have increased the demand for continuous monitoring. The usage of UAV (Unmanned Aerial Vehicles) for this purpose has escalated. However, early UAV monitoring methods encountered limitations in the continuous installation and field measurement of GCP (Ground Control Points), necessitating the use of a reference DEM (Digital Elevation Model) for elevation correction. Notably, as the study area includes coastal dunes on islands, which differ from the mainland, long-term monitoring involves substantial costs and manpower for GCP surveying. This research introduces an elevation correction method for monitoring changes in coastal dunes, building upon previous studies. UNET was used to distinguish classes in invariant areas and to extract characteristic values from these areas. These values were normalized using the Z-score to eliminate outliers, and a linear regression formula was applied to adjust the DEM values. Over eight years, 13 sets of orthoimages and DEMs were created, both with and without GCPs. The proposed technique was evaluated by comparing DEMs with GCPs to those corrected using the proposed method without GCPs. Additionally, transects were selected to assess the effectiveness of the proposed monitoring method. This study confirms the feasibility of using the corrected DEM without ground control point data for coastal dune monitoring.
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최석근(Choi Seok-Keun),조의환(Jo Eui-Hwan),이승기(Lee Seung-Kee),이병용(Lee Byung-Yong) 대한공간정보학회 2010 한국지형공간정보학회 학술대회 Vol.2010 No.3
본 연구는 디지털 항공영상의 축소편집을 이용하여 제작한 1/25,000 수치지도를 이용하여 동 축척의 지형도를 제작하는 방안에 대하여 연구 수행하였다. 국가기본도제작은 전국을 권역으로 나누어 일정한 주기로 촬영하여 제작하고 있기 때문에 최신 자료제공 및 경제성 등에 많은 문제점을 나타내고 있다. 현재 국가에서는 고품질 디지털항공영상을 이용한 국가기본도 제작을 수행하고 있기 때문에, 이들 자료를 이용하여 지형도제작에 활용함으로써 지도정보의 최신성을 확보하고, 지도제작비용을 최소화할 수 있는 가능성을 분석하고자 한다. 이를 위해 수치지도 및 지형도의 지형ㆍ지물분류체계를 분석하였고, 지형도제작 공정에 따라 자료처리를 수행한 후 그 효용성을 분석하였다.
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디지털 항공영상 성과를 이용한 1/5,000 수치지도 축소편집
최석근(Choi Seok-Keun),정성혁(Jung Sung-Hyuk),조의환(Jo Eui-Hwan),이승기(Lee Seung-Kee) 대한공간정보학회 2010 한국지형공간정보학회 학술대회 Vol.2010 No.3
본 연구는 현재의 국가기본도 제작에 대한 문제점을 해결하기 위한 방안으로 고품질디지털 항공영상을 이용하여 소축척 수치지도를 제작함으로써 지도정보의 최신성을 확보하고, 제작비용을 최소화할 수 있는 가능성을 분석하고자 한다. 이를 위해 수치지도 지형ㆍ지물분류체계를 분석하여 불필요한 요소를 제거하였고, 제작 공정에 따라 자료처리를 수행하였다. 그 결과 기존 수치지도에 비하여 정확도 및 지형ㆍ지물의 표현에 좋은 결과를 나타냈으며, 효용성은 기존 제작방법과 유사한 결과를 나타냈다.
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최석근(Choi Seok Keun),김동윤(Kim Dong Yeun) 대한공간정보학회 2010 대한공간정보학회지 Vol.18 No.3
When the capacity of underground caverns' structures is measured, a general surveying is difficult to decide an accurate section of irregular shape and a photographic surveying has problems on picture acquisition due to underground dusts, noise and lighting conditions, etc. The laser scanner system is being much used for 3-dimensional modeling such as topography, planimetric features and structures, etc. without a target by measuring arriving time of a laser pulse reflected after scanning the laser pulse and calculating space coordinates of the reflection position. Accordingly, the present research carried out section and earthwork volume measurement of a tunnel by using a laser scanner in underground anchorage excavation work that a bridge construction is being executed.
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최석근(Choi Seok Keun),안원태(Ahn Won-Tae) 대한공간정보학회 2006 대한공간정보학회지 Vol.14 No.3
The existing tunnel survey method contains many problems of taking much measuring time, increasing construction expenses, and delaying a term of construction, Therefore the site survey system for an improvement efficiency is developed. This system will be able to solve the error factor and the problem of curtailment of time and expenditure. In order to solve these problems it connected a measurement equipment and a notebook computer, and developed the system which simultaneously with tunnel measurement it will be able to decide locations and errors from site at real-time. The development of the tunnel survey system minimize the error occurrence as measuring tunnel, and the probability of more or less excavation. Therefore this site survey system leads to the effect of the improvement execution quality of work, the cost reduction and the construction term reduction.
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최석근(Choi Seok Keun),이승기(Lee Soung Ki),조의환(Jo Ui Hwan),박상전(Park Sang Jeon) 대한공간정보학회 2009 대한공간정보학회지 Vol.17 No.3
Field surveys for the digital map being constructed is being conducted using various work guide books based on the digital mapping internal rule. However, a modification of a rule used for paper map construction is being used for the digital mapping rule, which is causing many problems with the quality of the digital map. Therefore, to construct a high-quality digital map, general standards related to conducting field surveys need to be reviewed, and it's extremely important to construct an accurate digital map based on this. Accordingly, in this study, problems related to conducting field surveys for the construction of the digital map are analyzed in order to establish more suitable field survey standards for constructing an accurate digital map. To this end, work regulations related to construction of a digital map were analyzed, and attribute and field survey data were compared to those of a previously-constructed digital map for analysis. By reflecting opinions of field surveyors and related experts to the results of the analysis, more suitable field survey standards for constructing the digital map were presented.
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