Multivariate map: Difference between revisions

Revision as of 08:55, 8 November 2020

Revision as of 08:57, 8 November 2020

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==History==

[[File:Minard-carte-viande-1858.png |thumb|left|350px300px| An 1858 multivariate map by Charles Joseph Minard, using a nominal choropleth to represent departments that supplied meat to be consumed in Paris, proportional circles to represent significant volumes of that meat, combined with pie charts dividing it into relative proportions of beef (black), veal (red), and mutton (green).]]

The first multivariate maps appeared in the early [[Industrial era]] (1830-1860), at the same time that [[Thematic map | thematic maps]] in general were starting to appear. An 1838 booklet of maps produced by Henry Drury Harness for a report on Irish railroads included one that simultaneously showed city populations as [[Proportional symbols]] and railroad traffic volume as a [[Flow map]].<ref name="robinson1955">{{cite journal |last1=Robinson |first1=Arthur H. |title=The 1837 Maps of Henry Drury Harness |journal=The Geographical Journal |date=Dec 1955 |volume=121 |issue=4 |pages=440-450 |url=https://www.jstor.org/stable/1791753}}</ref><ref name="harness1837">{{cite book |last1=Griffith |first1=Richard John |last2=Harness |first2=Henry Drury |title=Atlas to Accompany 2nd Report of the Railway Commissioners |date=1838 |___location=Ireland |url=http://digital.ucd.ie/view/ivrla:45724}}</ref>