Isopleths are contouring lines that connect units of equal distance to show 3D figures in a 2D map. On maps they can be used for mapping elevation, precipitation or any other of a number of measurements. Isopleths is data that cannot be actually collected but it is collected all around the area in question.
The above image generalizes and simplifies data with a continuous distribution, with 90% isopleths enclosing 90% of all points for a specific unit. The map makes use of Isopleths, creating a home range distribution by first looking at each point and identifying a user-specified number of nearest neighbors.
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