Snow's mapping technique

Snow's mapping technique involves tracing the exact locations of disease cases—such as cholera in 19th-century London—on a map. By doing this, he identified clusters and patterns that pointed to contaminated water sources. This spatial analysis allowed him to pinpoint outbreaks efficiently and identify the contaminated pump as the source. In essence, Snow's method combines disease data with geographic mapping to visualize relationships and uncover causes that might not be obvious through numbers alone. It's a pioneering approach in epidemiology, emphasizing how location and spatial relationships are crucial in understanding disease transmission.