Chicago Library Locations
Locations and density of all Chicago libraries.
I used the City of Chicago's "Libraries - Locations, Hours and Contact Information" dataset, which has location data for libraries. Here's a sketch for my original idea for the graphic:
DATA: "Libraries - Locations, Hours and Contact Information" (Chicago Open Data) TRANS: Latitude, Longitude = decompose Location COORD: Mercator Projection ELEMENT: point for location, label for location GUIDE: Title "Chicago Library Locations" GUIDE: Map Background
I ended up having trouble figuring out how to put map data into the graphic. I found an interesting webpage, "Making Maps with R", that talked about making maps with R.
My biggest critique of this graphic is that, besides the Illinois-Indiana border, administrative divisions are not really marked, so it's hard to tell where things are. I tried to mitigate this by include a label roughly where the loop is.
I also tried showing the density of the libraries using a hex bin graphic (see hex-bin figure). I initially used a lot of bins, but I found that when I used less bins (so, larger bins overall), I was able to perceive more variation, which makes it easier to see that most of the libraries are just west and south of the loop.
Code used to create "Chicago Library Locations"
- code.r - A fragment of the code used to generate the graphic (lost the original code).