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NTIS 바로가기대한원격탐사학회지 = Korean journal of remote sensing, v.30 no.5, 2014년, pp.651 - 664
정재훈 (연세대학교 토목환경공학과) , 우엔 콩 효 (연세대학교 토목환경공학과) , 허준 (연세대학교 토목환경공학과) , 김경민 (국립산림과학원 기후변화연구센터) , 임정호 (울산과학기술대학교 도시환경공학부)
Recently, the demands of accurate forest carbon stock estimation and mapping are increasing in Korea. This study investigates the feasibility of two methods, k-Nearest Neighbor (kNN) and Regression Tree Analysis (RTA), for carbon stock estimation of pilot areas, Gongju and Sejong cities. The 3rd and...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
산림량 추정 방법에는 무엇이 있는가? | 한편, 산림량 추정 방법에 있어서 전 세계적으로 kNearestNeighbor(kNN), artificial neutral network,Regression Tree Analysis(RTA), biomass from cluster labeling using structure and type, directradiometric relationships, land cover classification과 같은 다양한 방법론이 개발되어 왔으며(Luther et al. 2006; Labrecque et al. 2006; Lu 2006), 그 중에서도 kNN 및 회귀분석에 기반한 연구 빈도가 매우 높은 것으로 조사된 바 있다(Cho et al. 2011). | |
원격탐사를 통한 산림 모니터링의 장점은 무엇인가? | 2000). 원격탐사를 통한 산림 모니터링의 장점은 첫째 방문 주기가 짧고, 둘째 넓은 지역을 대상으로 하며, 셋째 미조사 지점에 대한 추정이 가능하고, 넷째 비용이 저렴하다는 점이다(Muukkonen 2006; Heo et al. 2006a). | |
논문의 저자가 지상부 산림바이오매스 탄소저장량의 변화를 추정함에 있어서 kNN 및 RTA 알고리즘의 효용성을 비교·분석하기 위해 실시한 것은? | 본 연구에서는 공주시 및 세종시를 대상으로 지상부 산림바이오매스 탄소저장량의 변화를 추정함에 있어서 kNN 및 RTA 알고리즘의 효용성을 비교·분석하였다. 이를 위해 RMSE와 평균편의를 포함한 각종 탄소통계량을 정량적으로 비교하였으며, 이후 탄소지도 생성을 통한 육안 분석을 실시하였다. 또한 1992년과 2010년 사이의 탄소분포변화를 보다 효과적으로 분석하기 위해 차분지도를 생성하였다. 분석결과 RTA의 경우 평균편의가 작고, 탄소의 공간적 분포를 뚜렷하게 확인할 수 있었던 반면, 위성영상의 종류에 따라 탄소의 추정량 및 공간적분포에서 큰 차이를 나타내었다. |
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