My version of John Snow's Cholera Map

The map shows the distribution of the water pumps around Cholera deaths in 1854 in Soho, London. John Snow was suspecting the Cholera bacteria stemmed from one of the water pumps in the area, so he drew a map which showed clustering of deaths around pumps. Highest number of deaths per 50 meters happened around Pump No.1 on Broad street (now Broadwick). The wider the radius gets, the less transparent the circles become.