とうちせん
等値線
1. isopleth; isogram; isoline; contour line; isarithm
2. Contour lineA contour line (also isoline, isopleth, or isarithm) of a function of two variables is a curve along which the function has a constant value. In cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. A contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness of slopes.
Read “Contour line” on English Wikipedia
Read “等値線” on Japanese Wikipedia
Read “Contour line” on DBpedia
Read “Contour line” on English Wikipedia
Read “等値線” on Japanese Wikipedia
Read “Contour line” on DBpedia
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