Drawing Pierce County: Census Maps in ggplot2

A side project I am working on (more on that later if I can manage to blog more than once a year) has me needing to interact with several datasets that are broken down by census tract. This means that, among other things, I’m going to be outputting a lot of Tacoma and Pierce county map visualizations, and need to be able to outline and mark these tracts in a variety of ways.

So! Here is a rundown of exactly how I am pulling the census shapes, and squooshing them into ggplot2 in R. First, we’re going to need a library or two. Or six. Probably six. Continue reading