Unlike classed choropleth maps, unclassed choropleth maps do not have an averaged statistic value assigned to each particular used. In unclassed choropleth maps, the numeric attribute values are converted into proportional degrees of darkness. The higher the data value is, the darker the color shade assigned to it will be. The unclassed choropleth map above represents democratic and republic votes in the 2004 election. You can clearly see the density of republic (red) and democrat (blue) represented throughout the United States.
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