Chapter 7 Visualizing geographic data

  • Material mostly based on Wickham (2016 Chapter 3.7)
  • Objective:
    • Show variation across geographic entities
    • Show location of particular places or where data originated
    • Illustrate comparative strategy
  • Usage: Often to illustrate were data was collected or how it varies across geographic units
  • Map data is tedious… :-S
  • Types of data: vector boundaries, point metadata, area metadata, raster images (Wickham 2016, 55f)
  • Challenges: Map data may change (e.g., changes of administrative boundaries)


Wickham, Hadley. 2016. Ggplot2: Elegant Graphics for Data Analysis. Springer.