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Impervious Surface Mapping of Cheongju by Using RapidEye Satellite Imagery

RapidEye 위성영상을 이용한 청주시의 불투수면지도 생성기법

  • Park, Hong Lyun (Satellite Remote Sensing Lab, Korea Polar Research Institute, KIOST) ;
  • Choi, Jae Wan (School of Civil Engineering, Chungbuk National University) ;
  • Choi, Seok Keun (School of Civil Engineering, Chungbuk National University)
  • 박홍련 (한국해양과학기술원 부설 극지연구소 극지원격탐사연구실) ;
  • 최재완 (충북대학교 공과대학 토목공학부) ;
  • 최석근 (충북대학교 공과대학 토목공학부)
  • Received : 2014.02.05
  • Accepted : 2014.03.11
  • Published : 2014.03.31

Abstract

Most researches have created the impervious surface map by using low-spatial-resolution satellite imagery and are inefficient to generate the object-based impervious map with a broad area. In this study, segment-based impervious surface mapping algorithm is proposed using the RapidEye satellite imagery in order to map impervious area. At first, additional bands are generated by using TOA reflectance conversion RapidEye data. And then, shadow and water class are extracted using training data of converted reflectance image. Object-based impervious surface can be generated by spectral mixture analysis based on land cover map of Ministry of Environment with medium scale, in the case of other classes except shadow and water classes. The experiment shows that result by our method represents high classification accuracy compared to reference data, quantitatively.

많은 연구들은 저해상도 위성영상을 이용하여 불투수면을 생성하며, 광역적인 객체 단위의 불투수면을 생성하는 데에 효율적인 성과를 이루지 못하고 있는 실정이다. 본 논문에서는 RapidEye 위성영상을 활용한 객체 기반의 불투수면 생성 기법을 제안하였으며, 이를 실험지역에 적용하고자 하였다. 분광반사율로 변환된 RapidEye 위성영상을 활용하여 추가적인 밴드를 생성하였으며, 훈련자료를 이용하여 그림자 및 수계 클래스를 추출하였다. 해당 클래스를 제외한 나머지 클래스들은 환경부의 중분류 토지피복지도와 분광혼합분석 모델을 활용하여 피복단위의 불투수 비율 영상을 생성하였다. 참조자료와의 정량적 비교평가를 통하여 본 연구에서 적용한 불투수면 생성 방법의 효용성을 검증하였다.

Keywords

References

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