Tracing the 1854 broad street cholera outbreak with python geo visualization
Channel: Fuenfgeld
Date: 2021-02-26

Try out the Code here: https://colab.research.google.com/drive/1yRu5m7Lyxtoo1aPpPqqFRrMWdl_2CR6w?usp=sharing

In this Tutorial we follow the footsteps of Dr. John Snow using the programming language python.
Dr. John Snow was a physician from London in 1854 when a cholera outbreak occurred in the Soho district, in the West End of London. There was widespread belief that "Miasma" or bad air and stench was the cause of the cholera outbreak in Soho district. However, Dr. Snow was skeptical of the Miasma theory and was certain that cholera was likely a water-borne illness.
In addition to his systematic process of determining how cholera is transmitted, he began to create maps of the Cholera deaths in Soho and to map the locations of water pumps within the neighbourhood. Dr. Snow identified the source of the outbreak as the public water pump on Broadwick Street with this result.

We recreate this map with some simple lines of python code using Google Colab book and a python library called folium.
We explain how geo coordinates are created on longitude and latitude values.  How they can be displayed in OpenStreetMap (OSM) using layers. We also demonstrate how Outlines can be drawn on the map using a list of geo coordinates modeled in geojson.

Chapters:
0:00 Intro
3:57 Geo Coordinates
5:25 Plotting the Map
8:48 Layer Concept
10:25 Data Preparation
19:23 Adding the Pumps to the map
23:41 Adding the Cholera Cases to the map
27:46 Adding an Outline around the outbreak
30:15 Adding the brewery and the workhouse


 
The Code for the Tutorial can be found here: https://github.com/Fuenfgeld/DatamanagementAndArchiving/tree/main/GeoCodingTutorial

Check also out the GitHub Repository from Kim Hee who designed this Tutorial: https://github.com/kimheekimi

Images of John Snow and the Original Map was taken from:
https://commons.wikimedia.org/wiki/File:John_Snow.jpg
https://commons.wikimedia.org/wiki/File:Snow-cholera-map-1.jpg