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http://dx.doi.org/10.11108/kagis.2011.14.1.040

Evaluating Suitable Analysis Methods Using Digital Terrain in Viewshed Analysis  

Yeo, Chang-Hwan (Dept. of Urban and Regional Planning, Deagu University)
Jang, Young-Jin (Dept. of Architecture Engineering, Deagu University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.14, no.1, 2011 , pp. 40-48 More about this Journal
Abstract
The purpose of this study is to contribute enhancing the accuracy of viewshed analysis through the explanation for an analysis method of viewshed analysis using GIS. According to previous studies, the visible area using digital terrain in viewshed analysis depends on a visible interest area, scale of terrain, spatial resolution and surface data. In this study, we used trend analysis and RMSE analysis in order to find the effect of a visible interest area, scale of terrain, etc in viewshed analysis. Results of this study are as follows. First, the result of viewshed analysis depends on a visible interest area, scale of terrain, spatial resolution, surface data such as previous studies. Second, the results in forest area are reliable than those of flat area in terms of a visible interest area. Third, the results based on raster grid data are stable than those of TIN(triangulated irregular network) in terms of input surface data. Fourth, according to the result of trend and RMSE analysis, the spatial resolution for analysis is differently applied to different scales digital terrain map in viewshed analysis. In detail, it is desirable that the spatial resolution is set less than 10m(in the case of 1/1,000 digital terrain map), 20m(in the case of 1/5,000 map), 30m(1/25,000 map).
Keywords
Viewshed Analysis; Digital Terrain Model; Digital Elevation Model; Triangulated Irregular Network;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 김만규, 박종철. 2008. 수치표고모형(DEM)의 해상도가 물리 결정 일괄 매개변수수문모형의 모의 결과에 미치는 영향 평가. 한국지리정보학회지 11(3):151-165.
2 박진형, 이관수, 이삼노. 2004. DEM의 정확도 분석에 의한 도시 소유역의 유출해석. 한국지리정보학회지 7(1):28-38.
3 이근상, 고덕구, 채효석, 신영호. 2003. 항공레이저 측량 자료의 해상도에 따른 DEM 오차 비교평가 연구. 한국지리정보학회지 6(3): 33-42.
4 이준학, 김항덕, 오경두. 2008. GIS을 이용한 지형분석과 가변적 공간단위의 문제. 육사논문집. 64(1):579-595.
5 한국건설기술연구원. 2001. 한국지형에 적합한 수치표고모형 구축방안 연구.
6 Lee, J. 1991. Analyses of visibility sites on topographic surfaces. International Journal of Geographical Information Systems 5(4):413-429.   DOI
7 Mark, A.M. and J.D. Denis. 2001. An accuracy assessment of various GISbased viewshed delineation techniques. Photogrammetric Enginnering & Remote Sensing 67(11):1293-1298.
8 Quinn, P., K. Beven, P. Chevallier and O. Planchon. 1991. The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models. Hydrological Processes 5:59-79.   DOI
9 Wang, J., J.R. Gary and W. Kevin. 1996. A fast solution to local viewshed computation using grid-based digital elevation models. Photogrammetric Enginnering & Remote Sensing 62(10): 1157-1164.