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수치항공사진을 이용한 해운대해수욕장 해안선변화에 관한 연구
최철웅,김영섭 한국지리정보학회 2001 한국지리정보학회지 Vol.4 No.4
최근 환경문제에 관한 관심과 함께 해빈유실 및 백사장 감소에 관한 논란이 많다. 해빈유실과 해안폭 감소는 부산지역 경제에 주요한 수입원인 관광산업에 지대한 영향을 미친다. 특히 부산의 해수욕장은 전국적으로 년 800만 명 이상(2000년 기준)이 방문하는 우리나라 최대의 해수욕장이며, 수려한 경관과 각종 편리한 부대시설 등으로 매년 방문객이 증가하고 있으나 모래유실로 말미암아 해안 폭이 감소하고 있다. 부산광역시청 및 구청은 매년 수 만 톤의 바다모래를 해수욕장 개장 전에 운반하여 살포하는 등 수 억원의 예산을 매년 투여하고 있지만, 부산의 해수욕장에 대한 정확한 면적 혹은 폭에 대한 자료는 전무한 실정이다. 따라서 본 연구에서는 과거 50여 년 간의 항공 사진과 해양조사원의 부산항 수위관측자료를 분석하여 해운대 해수욕장의 해안선변화 추세를 분석하였다. 매 3년마다 촬영한 항공사진을 이용하여 정사투영과 DEM 추출을 실시하였다. 그 결과 해운대 해수욕장에 해안선변화가 발생하였는지, 어떠한 부분이 변화하였고, 면적과 폭은 얼마나 변화했는가를 분석하였다. There has been considerable controversy over the changes in the size of the beaches in the Pusan area; any loss of beach area will have an immense effect on the tourism industry, which is an important source of income for the local economy. The best beaches in Korea are in the Pusan area and were visited by more than 8 million persons in 2000. It is expected that the number of visitors, drawn to the scenic vistas and convenient facilities of this area, will increase annually. Any loss in the size of these swimming beaches will have an important negative effect on tourism income. Therefore, the local governments have gone to great lengths to preserve these beaches, transporting tens of thousands of tons of sand to the beaches before they open each year at a cost of billions of won annually. In this study, we analyzed aerial photographs and tide data for the past 50 years using digital aerial photo analysis and GIS techniques for each 3-year interval. We abstracted beach DEM (digital elevation model) and ortho aerial photographs, and conducted a space analysis. As a result, we were able to identify changes in the area and width of sections of Haeundae Beach.
Development of PKNU3: A small-format, multi-spectral, aerial photographic system
최철웅,이은경 대한원격탐사학회 2004 大韓遠隔探査學會誌 Vol.20 No.5
Our laboratory originally developed the compact, multi-spectral, automatic aerialphotographic system PKNU3 to allow greater flexibility in geological and environmental data collection.We are currently developing the PKNU 3 system, which consists of a color-infrared spectral cameracapable of simultaneous photography in the visible and near-infrared bands; a thermal infrared camera;two computers, each with an 80-gigabyte memory capacity for storing images; an MPEG board that cancompress and transfer data to the computers in real-time; and the capability of using a helicopterplatform. Before actual aerial photographic testing of the PKNU3, we experimented with each sensor.We analyzed the lens distortion, the sensitivity of the CCD in each band, and the thermal response of thethermal infrared sensor before the aerial photographing. As of September 2004, the PKNU3development schedule has reached the second phase of testing. As the result of two aerial photographictests, R, G, B and IR images were taken simultaneously; and images with an overlap rate of 70% usingthe automatic 1-s interval data recording time could be obtained by PKNU3. Further study is warranted toenhance the system with the addition of gyroscopic and IMU units.We evaluated the PKNU 3 system as a method of environmental remote sensing by comparing eachchlorophyll image derived from PKNU 3 photographs. This appraisement was backed up with existingstudy that resulted in a modest improvement in the linear fit between the measures of chlorophyll and theRVI, NDVI and SAVI images stem from photographs taken by Duncantech MS 3100 which has samespectral configuration with MS 4000 used in PKNU3 system.