• Title/Summary/Keyword: 주방위선

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Extraction and Analysis of Topographic Variables from DTM: A Case Study in Jeju Island (DTM으로부터 지형변수의 추출 및 분석: 제주도 사례연구)

  • Kim Seok Choong;Cho Sung Hyen;Kim Hyoung Chan
    • Journal of Soil and Groundwater Environment
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    • v.9 no.3
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    • pp.56-61
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    • 2004
  • The topographic variables, which influence the precipitation phenomena, are classified by elevation (ELEV), slope (SLOPE), distance to sea (SEA), obstruction (OBST), barrier (BAR), roughness (SHIELD), extracted and analysed according to resolutions. This study is performed through 100 m, 200 m, 400 m, 600 m, 800 m and 1,000 m based on 50 m DTM using TOVA (Topographic Variables Extraction Program). The result of a case study on Jeju weather station says that the variance according to resolution is generally less than that according to cardinal direction, but particularly SHIELD values and some cases for 600m resolution have a significant results.