This map is built on top of BlakeRobMills’s map which can be found on Twitter and on GitHub.
The autor added the data and the visualization for Zurich, Switzerland, changed the layout and some of the styling, added an R project, hopefully improved some of the code (the original R code didn’t load all necessary libraries, e.g.) and expanded the comments a bit. Kudos go to BlakeRobMills for the idea and original execution.
