Tuesday, November 27, 2012

Isopleths


Isopleth is a line on a map connecting places registering the same amount or ratio of some geographical or meteorological phenomenon. An isopleth is also known as a contour line. It is a feature of some charts and maps, connecting points, which have an equal value of some, variable at a given time and spatial area. They are used to assist in visualizing the general features of an area. Above is an illustration of the construction of an isopleth map. 


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