unclassed choropleth map

An unclassed choropleth map is characterized by a continuous ramp or color intensity, with no set intervals. This means that every value is a different color, so there may be numerous different shades of a certain color. This map shows population change from 1960 to 1970.

Source:http://go.owu.edu/~jbkrygie/krygier_html/geog_353/geog_353_lo/geog_353_lo07.html