• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2008년도 학술발표회 논문집
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• pp.1934-1938
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• 2008

본 연구에서는 시계열 항공영상을 이용하여 갑천의 토지이용 패턴을 제내지와 제외지로 구분하여 분석하였다. 먼저 제내지에서는 주거지, 도로, 공업지, 공공시설이 도시화 증가항목으로 선정된 반면, 농경지, 산림 그리고 하천은 도시화 감소항목으로 분류되었다. 또한 이러한 증가와 감소항목들이 1988년도를 기점으로 역전되는 경향을 나타내었으며 이를 통해 갑천의 토지이용이 1988년을 기점으로 도시화로 전환되었음을 추정 할 수 있다. 제외지에서는 시간이 경과함에 따라 현하천의 면적이 감소하는 것으로 나타났으며 이는 고수부지, 교량 그리고 보와 같은 도시화를 반영하는 토지이용 항목의 면적이 증가된 것을 의미한다. 또한 수문자료를 고려한 현하천에 대한 수계의 비율은 시간이 경과함에 따라 증가하였다. 전반적으로 볼 때, 항공영상은 하천관리 및 계획에 필요한 토지이용 정보를 구축하는데 유용하게 활용될 수 있으리라 판단된다.

• 대한공간정보학회지
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• 제1권2호
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• pp.159-166
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• 1993

도시화가 진행되면서 상대적(相對的)으로 삼림면적(森林面積)이 감소(減少)되어 환경(環境)이 파괴(破壞)되고 있다. 사진영상에 있는 대상물을 알아내기 위하여 일반적으로 형상 및 크기, 음영, 색조, 색채, 질감, 모양 등으로 판독한다. 촬영시간대에 따른 다양한 정보를 가지고 있는 항공사진(航空寫眞)의 판독(判讀)에 의한 지형정보(地形情報)를 자료기반화하면 경년(經年)의 자연환경변화(自然環境變化)를 알 수 있다. 본 연구에서는 부산직할시 금정구에 위치한 부산대학교(釜山大學校)를 모형지역으로 선정하였다. 경련(經年)의 삼림감소율(森林減少率)을 알기 위해 1980년과 1990년 10년 간격의 삼림면적(森林面積)을 비교(比較)한 결과 감소율(減少率)이 41%에 달하였으며 건설에 있어 단순한 계획이 아닌 보존적(保存的) 차원(次元)의 고려(考慮)가 있어야 함을 알 수 있었다.

• 한국지형학회지
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• 제28권2호
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• pp.45-57
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• 2021

In this study, the changes in morphology of Dokdo's gravel beach and its responses due to a storm event were analyzed using the aerial photos and 3D LiDAR data obtained during an ecosystem survey of the Dokdo in 2020. Dongdo Island's gravel beach, shown by aerial photo analysis, increased in area due to sedimentation after the construction of a dock, but there was no more significant changes in area after having grown to Sutdolbawi inside the dock. The changes in volume of the gravel beach were indicated based on 3D data acquired in May and November 2020. A strong typhoon that passed in September, 2002, caused erosion on the backshore and sedimentation on the foreshore and formed the berm by about 1.5 to 2 m high. The analysis showed that the sedimentation was 94.76 m³ in volume and 329 m² in area and the erosion was 250.75 m³ in volume and 603m² in area, which suggested that the overall change of the gravel beach was erosion. The changes in the morphology of the gravel beach on Seodo Island occurred with the seasons along with the changes in area. In addition, berms of different altitudes appeared on the southern and northern sides of the spit, which was also estimated to have formed by the seasonal current direction and wave energy.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
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• pp.548-551
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• 2007

Among components of digital topographic maps used officially in Korea, only contours have 3D values except buildings and trees that are demanded in landscape planning. This study presented a series of processes for 3Dreconstructing landscape features such as terrain, buildings and standing trees using LiDAR (Light Detection And Ranging) data and aerial digital photo graphs. The 3D reconstructing processes contain 1) building terrain model, 2) delineating outline of landscape features, 3) extracting height values, and 4) shaping and coloring landscape features using aerial photograph and 3-D virtual data base. LiDAR data and aerial photograph was taken in November 2006 for $50km^{2}$ area in Sorak National Park located in eastern part of Korea. The average scanning density of LiDAR pulse was 1.32 points per square meter, and the aerial photograph with RGB bands has $0.35m{\times}0.35m$ spatial resolution. Using reconstructed 3D landscape features, visibility with the growing trees with time and at different viewpoints was analyzed. Visible area from viewpoint could be effectively estimated considering 3D information of landscape features. This process could be applied for landscape planning like building scale with the consideration of surrounding landscape features.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.899-902
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• 2006

For a quick and accurate 3D modelling of a building, laser scanning data, digital maps, aerial photographs and satellite images should be fusioned. Moreover, library establishment according to a standard structure of a building and effective texturing method are required in order to determine the structure of a building. In this study, we made a standard library by categorizing Korean village forms and presented a model that can predict a structure of a building from a shape of the roof on an aerial photo image. We made an ortho image using the high-definition digital image and considerable amount of ground scanning point cloud and mapped this image. These methods enabled a more quick and accurate building modelling.

• Spatial Information Research
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• 제19권1호
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• pp.51-59
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• 2011

라인빙식의 항공디지털 카메라인 ADS 80의 후방(backward)영상으로 정사영성을 제작하고 건물의 기복 변위와 폐색영역을 보정 후, True Ortho Photo을 제작하였다. 또한 제작된 정사영상과 True Ortho-Photo을 검증을 위해 지상검사점, 사진기준점을 이용하여 평면 위치정확도 평가 및 분석한 결과, 프레임방식과 비교하여 상대적으로 소량의 지상기준점을 이용하여 고품질의 정사영상을 제작할 수 있었다. 또한 라인 방식 카메라의 True Ortho Photo 제작 시, 종중복도가 100%이므로 폐색영역 보정시에 효과적임을 검증 할 수 있었다.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2001년도 국제세미나 및 추계학술발표회 논문집
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• pp.153-162
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• 2001

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.508-511
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• 2006

Generally, stereo pair images are necessary for 3D viewing. In the absence of quality stereo-pair images, it is possible to synthesize a stereo-mate suitable for 3D viewing with a single image and a depth-map. In remote sensing, DEM is usually used as a depth-map. In this paper, LiDAR data was used instead of DEM to make a stereo pair from a single aerial photo. Each LiDAR point was assigned a brightness value from the original single image by registration of the image and LiDAR data. And then, imaginary exposure station and image plane were assumed. Finally, LiDAR points with already-assigned brightness values were back-projected to the imaginary plane for synthesis of a stereo-mate. The imaginary exposure station and image plane were determined to have only a horizontal shift from the original image's exposure station and plane. As a result, the stereo-mate synthesized in this paper fulfilled epipolar geometry and yielded easily-perceivable 3D viewing effect together with the original image. The 3D viewing effect was tested with anaglyph at the end.

• 대한공간정보학회지
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• 제11권1호
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• pp.51-59
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• 2003

본 연구에서는 기존 지형도나 준공도면 자료에서 상세정보가 누락되거나 갱신이 이루어지지 않아 시설물관리체계에 필요한 수치지도의 체계적인 구축이 요구되는 지역에 적용할 수 있도록 지상사진, 항공사진 등 영상자료에 다양한 사진해석 기법을 적용하여 수치지도를 생성하고 공간 및 속성정보를 추출하였다. 본 연구에서는 다중사진 촬영에 의하여 대상물의 3차원 모델을 생성하고, 촬영된 사진영상을 이용하여 대상물의 형태와 특징을 파악하는데 유용한 3차원 사진영상모델을 생성하였다. 또한, 소축척 항공사진을 이용하여 대상지역의 벡터라이징을 실행한 결과, 각 건물과 도로시설물의 위치와 형태 등 공간정보의 추출이 가능하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.453-454
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• 2003

Most research materials (data), which are used for the study of digital mapping and digital elevation model (DEM) in the field of Remote Sensing and Aerial Photogrammetry are aerial photographs and satellite images. Additionally, they are also used for National land mapping, National land management, environment management, military purposes, resource exploration and Earth surface analysis etc. Although aerial photographs have high resolution, the data, which they contain, are not used for environment exploration that requires continuous observation because of problems caused by its coastline, as well as single - spectral and long-term periodic image. In addition to this, they are difficult to interpret precisely because Satellite Images are influenced by atmospheric phenomena at the time of photographing, and have by far much lower resolution than existing aerial photographs, while they have a great practical usability because they are mulitispectral images. The PKNU 2 is an aerial photographing system that is made to compensate with the weak points of existing aerial photograph and satellite images. It is able to take pictures of very high resolution using a color digital camera with 6 million pixels and a color infrared camera, and can take perpendicular photographs because PKNU 2 system has equipment that makes the cameras stay level. Moreover, it is very cheap to take pictures by using super light aircraft as a platform. It has much higher resolution than exiting aerial photographs and satellite images because it flies at a low altitude about 800m. The PKNU 2 can obtain multispectral images of visible to near infrared band so that it is good to manage environment and to make a classified diagram of vegetation.