Metodbevispost

Choropleth Classification

Choropleth classification is the cartographic procedure of grouping the values of a quantitative variable into a small number of ordered classes so that areas can be shaded on a thematic map. Because a continuous distribution must be reduced to a handful of colour categories, the choice of how many classes to use and where to place the break values strongly shapes the map's message — the same data can look uniform or sharply divided depending on the scheme. Standard methods include equal interval, quantile, Jenks natural breaks, standard deviation, and head/tail breaks, each making different assumptions about what pattern the map should reveal.

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Choropleth Classification (Class-Interval Selection for Thematic Maps)

Taxonomisk metodpost · process-pipeline / human-geography

Slocum, T. A., McMaster, R. B., Kessler, F. C., & Howard, H. H. (2009). Thematic Cartography and Geovisualization (3rd ed.). Pearson Prentice Hall, Upper Saddle River, NJ. · ISBN 9780132298346

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Same method familyCartogram Constructionmachine-suggested · Relational suggestion, not evidence.Same method familyDasymetric Mappingmachine-suggested · Relational suggestion, not evidence.Same method familyGeodemographic Classificationmachine-suggested · Relational suggestion, not evidence.Same method familyModifiable Areal Unit Problemmachine-suggested · Relational suggestion, not evidence.