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. 2019 Aug 13;2(2):119–131. doi: 10.1007/s42001-019-00053-9

Fig. 3.

Fig. 3

Actual and computed district maps for Iowa (a, b) and North Carolina (c, d). Computed solutions are shown in green to the right of the actual congressional districts. Darker areas on the map (census tracts) are more densely populated