This weeks assignment was to create a flowline map in Adobe Illustrator depicting immigration to the United States. Flowline maps are used to show movement phenomena and generally utilize weighted lines (lines of proportional thickness) based on the value they represent. In the map above, the thickness of the line is proportional to the number of individuals from a particular region who immigrated to the United States. This was done by setting a maximum line thickness for the greatest value (Asia), then scaling down from there using a square root proportionality function. The audience should be able to quickly determine which regions had high and low immigration rates using this visual scale. Embedded is also a simple choropleth map showing the ultimate state distribution of immigrants in the U.S.
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