Definition of choropleth map in English:

choropleth map


  • 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.’
    • ‘Because these objectives often conflict, a choropleth map that is best for one objective may not be best for others.’
    • ‘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.’
    • ‘An important consideration in producing a choropleth map is the choice of classification scheme to be used.’


1930s: choropleth from Greek khōra region + plēthos multitude.


choropleth map