Flow maps are used to show the movement of data. The flow is displayed usually as a graphical element overlaying the base map. This map indicates what is the flow, the direction and source, how much does the flow represent and the general information about what the flow is about and how it is flowing.
This map shows the trade movement of cotton and wool imported throughout the world in 1858 and 1861. The blue represents Europe, Orange the British Territories in South Asia, Brown for Levant, Pink for Britain, and Light Blue for Brazil.
The ratio for this map is 1 millimeter equals to 5000 tons of wool and cotton.
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