Uncalassified choropleth maps assigns shadings proportional to the data values so that these choropleth maps do not have to classify the data. This map shows the amount of vegetables harvested in 2002, but does not specify which vegetables were harvested.
source: http://www.nass.usda.gov/research/atlas02/Crops/Vegetables%20and%20Melons%20Harvested/Vegetables,%20Acres%20Harvested%20for%20Sale-choropleth%20map.gif
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