choropleth map
/ˈkɒrə(ʊ)plɛθ
/noun
A map which uses differences in shading, colouring, or the placing of symbols within predefined areas to indicate the average values of a particular quantity in those areas. Compare with isopleth.They also compared a choropleth map showing the number of people living in each state with one showing population density....
- Care is needed in the interpretation of all maps, and choropleth maps are no exception.
- On a choropleth map, cartographic convention assigns the darkest color to the highest value.
Origin
1930s: choropleth from Greek khōra 'region' + plēthos 'multitude'.
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