Maps4:02 with Anwar Montasir
So far, the visualizations we’ve covered have mostly taken place on a grid with a labeled x-axis and y-axis. The exception is the pie chart, but even the pie chart has a fixed shape and strict parameters on how it can be presented. However, sometimes the story you’re telling involves geographic data. It might be possible to convey election results using a bar chart, for example, but users will likely find election information more meaningful when results are visualized by city, state, or county. Let’s take a look at some different ways that data visualization and geographic maps intersect.
Choropleth map: a map created by coloring in existing geographic regions based on the relative frequency of a variable.
Proportional symbol map: a map in which existing geographic regions include symbols that increase in size based on the absolute frequency of a variable.
Geographic heat map: a map demonstrating the frequency of data points while ignoring geographic boundaries.
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