Sunday, December 5, 2010

Isopleths

http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/water_nitro/water_and_nitrogen_cycles.htm
  Isopleth maps generalize and simplify data with a continuous distribution. They show the data as a third dimension on a map. For example, the contour lines on this map show the pH of precipitation across the United States. 

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