Description and Generalization of Contour Lines

  • Haowen Yan


A contour line (also isoline, isopleth, or isarithm) is a line on a map joining points of equal height or depth above or below a level, usually mean sea level. It is often just called a “contour”. Each contour is a closed curve (Veregin 1999, 2000; Cheung and Shi 2004). The difference in height or depth between successive contour lines is the contour interval. It generally becomes greater and greater when the map scale becomes less and less (Joao 1998).


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Haowen Yan
    • 1
  1. 1.Faculty of GeomaticsLanzhou Jiaotong UniversityLanzhouChina

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