A choropleth map using color
A choropleth map in grayscale
This week in Cartography our assignment was to use a simple map of the USA state and a spreadsheet of US Census data from 1990 and 2000 to create two choropleth maps. A choropleth map is a map that uses shading intensity proportional to the data value to visually communicate the results to the reader.
In the color map, I presented the percentage in population change for each state, grouping the states into five color groups using a classification method called Natural Breaks. In the grayscale map, states were grouped by regions and again presented in five groups using just variations in shading intensity. Overall, I'm pretty happy with the results. The maps look clean, convey the central message and are approachable.
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