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choropleth map
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choropleth map

Map on which the average numerical value of some aspect of an area (for example, unemployment by county) is indicated by a scale of colours or isoline shadings. An increase in average value is normally shown by a darker or more intense colour or shading. Choropleth maps are visually impressive but may mislead by suggesting sudden changes between areas.



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For spatial analysis, the obvious option is to present data on maps, with the variable of interest divided into classes or categories, and plotted using colors or hachure within each geographic unit, known as a choropleth map (Marshall, 1991).
Geospatial distribution of pesticide use and disparities in breast ... by Farah, Ibrahim O.; Abdalla, Mohamed H.; Hamadain, Elgenaid I. / Journal of the Mississippi Academy of Sciences
Figure 3 is a choropleth map for the period 1951-1980 that indicates an increase in the ATR across much of the continental United States.
Annual temperature range time-series trends and long-range forecasting by Snow, Mary M. / National Weather Digest
Redlands, CA) to create dot density and choropleth maps.
HIV epidemic among young Thai men, 1991-2000. (Dispatches) by Brown, Arthur E. / Emerging Infectious Diseases
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