Definition: Isoline

UN - Geographic Information Systems

Lines on a so-called isarithmic map that connect points of constant value. The best known example is an isohypse, which shows lines of equal elevation (also called an elevation contour map).
Source:
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009
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