Unclassed Choropleth Map

http://www.nass.usda.gov/research/atlas02/Crops/Vegetables%20and%20Melons%20Harvested/Vegetables,%20Acres%20Harvested%20for%20Sale-choropleth%20map.gif

An Unclassed Choropleth Map uses color shading to describe the data. The difference is that the data within a Unclassed Choropleth Map has no classification. It is difficult to depict the shading which makes this type of map less useful and less accepted.