Causes of Mortality in the Crimean Warĭuring the Crimean War in the 1850s, soldiers were dying at a very rapid rate - but this was not just because of the battles. The solution was to build better sewage systems and protect the wells from contamination. This finding helped the people trace a relationship between sickness and contaminated wells. The well in question was contaminated by sewage and serviced an area with a high concentration of cholera outbreaks. Through this data visualization example, they were able to find out that households that had the most deaths from cholera were all using the same well for drinking water. It contains small bar graphs on city blocks which show the number of deaths in a London neighborhood. The 1854 Broad Street Cholera Outbreak Map by John Snow (not Game of Thrones’ Jon Snow) is an early example of dot map visualization. It also contains a simple temperature line graph to illustrate the dropping temperature at the time. The color represents the direction of the journey - yellow for marching towards Moscow and black for the return trip. The width of the line shows the total number of soldiers. This chart has become one of the most famous data visualization examples of all time. He started the march with around 470,000 soldiers and only returned with 10,000 soldiers. The Napoleon March map tells the story of Napoleon’s march to Moscow in 1812 to conquer the city of Italy, which was a disaster.
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