Since at least 1896, The New York Times has published what is now the most iconic type of election map — a shaded choropleth. If you know your geography, you can quickly identify who won which ...

The map shows the rate county-by-county, with the hue darkening as layoffs spread. I actually mentioned this same map several months ago, but at that time I didn't know the "choropleth" complication.

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Choropleth maps — or maps that use color, shading or patterns to show quantitative differences — are some of the most common ways to visualize how counties as well as states are voting, ...

~Noun. choropleth map - a map that uses graded differences in shading or color or the placing of symbols inside defined areas on the map in order to indicate the average values of some property or ...