Choropleth Map- A type of thematic map that portrays areal data, where areas are shaded or patterned in proportion to the measurement of the statistical variable being represented. This is a classed choropleth map, where the varying percentages of people with a full education in Nova Scotia, Canada (2001) are represented by colors corresponding to natural break intervals (selected by the discretion of the map maker and information provided by a corresponding histogram). Numerical values for an areal unit may be areally averaged, expressed as percentages here. (http://www.cs.umd.edu/class/spring2005/cmsc838s/viz4all/viz4all_a.html).
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