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http://dx.doi.org/10.7848/ksgpc.2013.31.5.343

Validity Assessment of Viewpoints Using the Reverse-viewshed Frequency Analysis  

Park, Jong Chan (Institute for Geomatics Research Engineer, Saehan Aero Survey co., Ltd.)
Um, Dae Yong (Department of Civil Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography / v.31, no.5, 2013 , pp. 343-353 More about this Journal
Abstract
Recently, the landscape change by development has become more important and it's been stipulated that environmental effects evaluation must include LIA which reflects the said issue. Even though the selection of viewpoints which have the biggest impact on LIA result is stipulated in accordance with related rules, the criteria are inconsistent. Therefore, LIA experts' or project developers' subjective opinions have been very influential. In this case, wrong viewpoints which do not meet the selection criteria could be selected based on a discretionary interpretation on them, which could in turn substantially reduce an accuracy and reliability of the LIA results. Therefore, this research suggested the reverse-viewshed frequency technique as method that can be verified accuracy and reliability of viewpoints. And it has comparatively analyzed effective viewpoints using reverse-viewshed frequency analysis on viewpoints which were selected for LIA. As a result, the average validity was just 58% of total viewpoints used in construction sites. And the validity of viewpoints decreased as viewshed frequency increased. Based on results above, it was able to verify that the unreasonable points of a substantial proportion have been used as viewpoints in LIA process.
Keywords
Viewpoint; Reverse-viewshed Frequency Analysis; Validity-ratio; Geographic Information System; Landscape Impact Analysis;
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Times Cited By KSCI : 3  (Citation Analysis)
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