Wednesday, December 2, 2009

Proportional Circle Maps

Proportional circle maps display data in relation to the size of the circles.  Circles are a popular symbol used in mapping for several reasons. They are compact, easy to create, and are more visually stable than other symbols. This results in an image that will cause little eye irritation (perceptually).


http://pubs.usgs.gov/fs/fs-004-03/images/fig5lg.gif

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