Flow maps, also called line maps, are maps that show the actual path of entities across a surface and their intensity. Flow maps can also show idealized paths called desire lines and only show general direction, not the actual path. Common flow maps depict traffic flows, social networks flows, and processes of the exchange of goods and services. The above map is a flow map that show the actual paths/flow of refugee migration to Canada between 1990-1999 and their intensity, depicted by the thickness of the migration paths.
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