Wednesday, April 10, 2013

Range Graded Proportional Circle Map

Map of rivers showing width, water color, and bed material

Range Graded Proportional Circle Maps are maps that illustrate data by groupings. These maps are nice because not only do they show data in the traditional proportional circles, but we see larger circles and larger data numbers. The images in the circles represent a range of data that each of the individual circles falls into. The map above shows river characteristics. The area of the circle measures channel width and the color of the circle approximates the color of the water. 

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