The 1854 John Snow's cholera map outbreak was one of the first epidemics to be investigated using modern mapping techniques. John Snow, a physician in London, England, used a dot map to track the spread of cholera through the city's water supply. His map showed that the majority of cases were concentrated around a certain water pump on Broad Street. After investigating further, Snow concluded that the water from the Broad Street pump was contaminated with cholera and that this was the source of the outbreak. He recommended that the handle of the pump be removed to prevent further spread of the disease. This was one of the first times that epidemiology was used to investigate and solve a disease outbreak.
Recently, a group of data visualization experts used the D3 JavaScript library to recreate Snow's map. The recreation is an impressive feat, and it's fascinating to see how the data has been translated into a visual format.
This project used D3 JavaScript to recreate the interative version of John Snow's map with additional charts, which helped to visualize the data and understand the outbreak.
The visualization dashboard is displayed below. Click here for documentation and follow this link for demo-video.