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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.
Example of a Sankey diagram Sankey's original 1898 diagram showing energy efficiency of a steam engine. Sankey diagrams are a data visualisation technique or flow diagram that emphasizes flow/movement/change from one state to another or one time to another, [1] in which the width of the arrows is proportional to the flow rate of the depicted extensive property.
In 1988, David Hyerle wrote Expand Your Thinking and introduced Thinking Maps. These are a set of techniques used in primary and secondary education with the intention of providing a common visual language to information structure. There are eight types of maps: Circle Map: used for defining in context; Bubble Map: used for describing with ...
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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.
If you love Scrabble, you'll love the wonderful word game fun of Just Words. Play Just Words free online!
Relying on surveys and other data, the UN estimated that 1 in 20 adults — a quarter-billion people around the world — used at least one drug in 2014. These maps show how dangerous illegal ...
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