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Recreating John Snow's Ghost Map

Recreate John Snow's famous map of the 1854 cholera outbreak in London.

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8 Tasks1,500 XP

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Project Description

In 1854, Dr. John Snow (no, not the Game of Thrones's character) used a pre-computer method of spatial analysis by mapping patterns and occurrences of cholera outbreaks in Soho, London. He mapped the deaths in the neighbourhood and determined that a vast majority occurred around one particular water well and that those that died used that well.

This is not only one of the earliest uses of data visualization, but by solving this problem, Dr. John Snow also founded spatial analysis and modern epidemiology. In this Python project, you will reanalyze the data and recreate his famous map.

Project Tasks

  1. 1
    Dr. John Snow
  2. 2
    Cholera attacks!
  3. 3
    You know nothing, John Snow!
  4. 4
    The Ghost Map
  5. 5
    It's the pump!
  6. 6
    You know nothing, John Snow! (again)
  7. 7
    The picture worth a thousand words
  8. 8
    John Snow's myth & Did we learn something?


Python Python


Data ManipulationData Visualization
Radovan Kavicky HeadshotRadovan Kavicky

President and Principal Data Scientist at GapData Institute

Radovan Kavicky is Macroeconomist (academically) and Data Science Consultant (professionally). He is President and Principal Data Scientist at GapData Institute and the founder of PyData Bratislava, R <- Slovakia, and skczTUG (SK & CZ Tableau User Group). Radovan is also the author of Practical Data Science and a mentor in the R for Data Science (#R4DS) online learning community. Find out more about Radovan on LinkedIn. You can also follow him on Twitter at @radovankavicky.
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