choropleth map

From Ancient Greek χώρα (khṓra, “location”) + πλῆθος (plêthos, “a great number”) + English map. First proposed in 1938 by American geographer John Kirtland Wright to mean "quantity in area," although maps of the type have been used since the early 19th century.^[1]

• (UK) IPA^(key): /ˈkɔːɹəˌplɛθ/

• Audio (General American):

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choropleth map (plural choropleth maps)

1. A thematic map in which the distribution of some property is shown using different colours.

   Synonyms: choropleth, (misspelling) chloropleth, (misspelling) chloropleth map

   • 1999, Jeffery T. Walker, Statistics in Criminal Justice: Analysis and Interpretation, page 66:

     The scale and unit of analysis for choropleth maps depends upon the area to be mapped.

   • 2004, Gerald R. Pitzl, Encyclopedia of Human Geography, page 29:

     The choropleth map, which shows distributions by area, is one of the most frequently used maps in geography.

   • 2013, Ian Muehlenhaus, Web Cartography: Map Design for Interactive and Mobile Devices, page 147:

     As the Mercator is to Web projections, choropleth maps are to thematic cartography (i.e., they are overused).

• area-class
• isarithmic

• choropleth map on Wikipedia.Wikipedia