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  2. Flow map - Wikipedia

    en.wikipedia.org/wiki/Flow_map

    1838 map of pre-railroad cargo traffic in Ireland, one of the first thematic maps to use proportional symbols. The earliest known map to visually represent the volume of flow were two maps by engineer Henry Drury Harness, published in 1838 as part of a report on the potential for railroad construction in Ireland, showing the quantity of cargo traffic by road and canal.

  3. Charles Joseph Minard - Wikipedia

    en.wikipedia.org/wiki/Charles_Joseph_Minard

    Minard created his "revolutionary" [2]: 40 first flow map in 1845 to inform the discussion about routing the rail line in the area between Dijon and Mulhouse. The map shows traffic on the pre-existing roads in the area. Two hundred copies of it were distributed to various stakeholders, and it dominated the debate among the deputies and engineers.

  4. Sankey diagram - Wikipedia

    en.wikipedia.org/wiki/Sankey_diagram

    It is a flow map, overlaying a Sankey diagram onto a geographical map. It was created in 1869, predating Sankey's first Sankey diagram of 1898. Minard had used this form of diagram for visualising flow of goods and transport of people from at least since 1844. [6]

  5. Flow (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Flow_(mathematics)

    A flow on a set X is a group action of the additive group of real numbers on X. More explicitly, a flow is a mapping ... f is a smooth map such that for each ...

  6. Thematic map - Wikipedia

    en.wikipedia.org/wiki/Thematic_map

    Flow map depicting US aid to Africa in 2016. Source: USAID. Flow maps are maps that use line symbols to portray movement or relationship between two or more places, such as air travel, monetary aid, or economic trade. The lines may be schematic straight lines or curves, or may represent the actual travel route.

  7. These maps show how dangerous illegal drugs flow around ... - AOL

    www.aol.com/article/2016/07/05/maps-show-how...

    UN World Drug Report 2016. In Peru, coca-bush cultivation jumped 44% between 2000 and 2011. While cultivation fell 31% between 2011 and 2014 (back to 2000 levels), it still accounts for 32% of ...

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