Finally, maps! If you think about maps single purpose is to take from location A to B I hope this chapter will change your mid. Maps are actually a wonderful way to display all sorts of information. Data journalists often use maps, a tendency created by Dr. John Snow whose creativity and efforts ended a cholera outbreak that happened in London by the nineteenths.
Maps can optimally display information that is somehow related to geography. This chapter shall create those using ggplot2, ggvis, and plotly. We will begin by drawing the John Snow cholera map, going all the way through Afghanistan map to an interactive globe showing the countries affected by the 2009 baking crises.
