Snow's Cholera Data

Description

During the 1854 cholera epidemic in London, John Snow collected data on the location (street addresses) of persons who died of cholera, as well as the location of water pumps in the city. Snow believed (correctly) that cholera was transmitted through contaminated water. Snow's map of London, showing the locations of deaths and water pumps is given below:

John Snow's map of London
Snow.png

The table below gives the coordinates of 578 person who died of cholera. The data are a digitized version of Snow's map, with coordinate relative to a set of axes through the center of the map, produced by the National Center for Geographic Information and Analysis. The units are meters. The data have been modified by rounding to the nearest 0.1 meter.

Deaths
xy
13.611.1
9.912.6
14.710.2
15.210.0
13.213.0
13.88.9
13.110.6
11.011.9
15.211.7
11.19.6
11.713.6
12.311.5
10.611.9
14.610.6
16.614.3
9.510.7
13.310.7
15.010.2
15.110.0
10.99.8
12.512.0
11.811.8
12.210.4
13.912.8
12.311.9
11.011.9
11.09.8
13.513.3
10.811.7
12.213.6
13.914.0
12.511.6
15.712.7
12.99.9
13.010.2
13.711.4
13.111.1
13.411.1
14.89.4
13.213.2
9.812.5
12.512.0
13.410.2
14.411.6
16.014.2
10.912.0
12.513.4
15.812.4
16.514.3
11.28.6
15.812.2
11.09.8
11.713.6
11.512.3
11.815.1
13.013.9
14.113.1
14.810.0
12.611.0
14.612.9
12.511.2
14.58.7
9.210.8
17.97.2
11.214.7
9.510.7
10.89.9
16.114.1
10.410.6
13.79.0
15.813.9
12.211.8
11.510.7
15.411.2
15.912.2
10.211.9
14.012.8
16.511.4
17.511.2
13.88.9
14.110.6
14.711.5
12.613.4
11.710.4
14.412.6
15.217.0
15.813.9
13.912.7
15.211.6
13.212.9
12.711.3
15.113.2
12.811.6
13.613.2
14.013.1
15.413.3
14.814.9
10.311.4
10.511.6
9.912.3
14.29.2
13.612.5
15.09.8
15.712.4
9.212.0
16.811.4
13.310.3
10.611.6
8.37.2
13.413.0
14.58.7
16.811.4
14.711.9
10.311.4
13.211.2
9.113.2
15.210.0
8.47.4
15.39.8
13.312.4
13.29.7
12.611.5
13.911.0
13.512.5
15.217.0
11.611.1
9.410.8
11.49.6
11.214.8
11.910.2
15.010.2
13.611.5
14.113.6
10.511.2
10.39.5
13.812.7
13.412.4
12.611.0
15.713.9
13.88.9
13.212.3
15.110.1
13.210.5
14.611.4
14.410.3
15.014.1
13.110.6
13.48.8
11.89.5
16.014.4
10.610.9
14.610.6
9.312.2
14.511.5
10.512.3
14.012.8
10.611.6
10.611.7
15.76.1
11.811.2
11.810.3
11.611.1
15.814.0
10.711.7
13.413.3
11.211.5
15.512.8
14.010.7
13.412.5
14.616.2
15.313.4
14.58.8
11.49.9
12.511.2
13.811.2
10.611.0
10.511.0
14.810.8
14.212.0
13.312.0
10.411.8
12.510.6
15.012.0
10.69.9
13.111.1
10.111.5
11.211.4
12.911.7
12.210.0
12.411.3
11.910.2
11.511.4
11.713.6
12.511.5
14.812.3
14.012.7
12.513.4
9.212.3
10.411.3
12.79.2
9.16.3
8.37.1
15.313.6
11.211.4
11.811.2
12.711.3
11.811.2
12.213.6
12.711.3
13.613.4
8.815.1
12.211.3
16.214.3
12.811.6
13.613.4
12.710.2
15.011.9
13.912.7
13.69.1
12.513.0
9.912.4
17.67.3
11.111.1
16.714.4
9.711.0
13.413.0
13.110.6
13.710.1
11.711.1
13.111.8
13.111.8
12.311.9
14.912.8
11.512.6
12.911.6
11.011.2
15.814.0
12.910.3
12.311.5
9.811.8
12.711.3
12.712.1
16.09.2
11.011.9
14.19.3
11.011.7
14.58.7
15.611.3
9.611.8
15.511.1
14.412.2
11.49.9
13.711.3
11.411.0
16.09.1
9.911.9
10.89.7
12.611.6
9.310.7
13.813.8
13.813.8
14.710.0
15.310.0
14.112.4
13.810.1
11.011.3
12.410.5
14.810.0
15.013.6
15.413.5
12.814.3
11.39.8
10.511.8
11.011.2
13.49.5
10.311.4
9.611.8
14.512.3
11.511.4
12.710.7
15.012.0
12.314.8
12.910.8
15.39.1
15.89.6
13.113.9
12.911.7
15.312.1
13.011.8
12.511.2
15.813.0
14.013.4
13.014.4
13.914.6
10.99.7
16.014.0
15.110.1
13.512.6
11.612.3
10.712.0
16.811.6
13.914.6
13.711.1
13.39.6
15.712.4
15.511.2
11.011.2
15.511.1
11.79.6
12.411.4
11.111.5
9.610.9
8.37.2
14.013.3
13.213.0
15.39.3
15.511.2
15.47.3
16.114.3
12.413.7
12.211.8
15.111.7
14.012.9
9.610.9
16.314.3
12.610.6
10.512.9
14.012.8
15.511.3
11.011.2
13.312.9
13.913.6
13.39.6
12.710.7
15.411.2
15.713.9
13.811.1
11.710.5
16.114.3
12.611.0
15.411.3
16.314.4
12.512.1
15.712.9
11.512.6
14.212.1
16.310.1
13.611.2
12.610.4
11.711.2
8.810.9
10.914.7
11.611.1
13.011.2
13.711.3
11.111.8
14.612.3
10.411.6
13.112.3
11.914.2
13.310.3
9.912.2
12.712.8
9.310.6
11.69.5
13.112.3
11.411.0
13.611.5
11.813.6
16.314.4
8.712.1
15.712.2
12.211.4
14.814.1
13.58.9
15.712.9
11.914.2
12.512.8
14.413.1
12.214.1
15.311.4
11.510.8
9.011.2
10.88.8
14.910.1
13.211.9
13.48.8
14.412.0
12.211.4
12.014.6
13.611.6
8.812.0
13.411.0
12.612.8
15.614.2
12.512.0
12.411.3
12.411.4
13.412.6
12.011.4
9.911.8
12.113.6
14.413.1
15.712.9
13.811.1
11.410.9
13.814.2
15.611.3
15.010.2
14.113.1
13.29.8
13.313.0
10.912.0
12.110.0
14.013.9
11.310.8
13.413.0
13.512.5
14.812.0
13.011.0
12.411.3
12.314.8
13.112.4
14.813.2
9.812.5
14.110.6
12.014.6
16.114.2
12.711.3
14.710.1
8.812.1
10.512.3
12.214.2
11.713.6
8.311.6
12.413.2
16.78.4
15.77.2
16.114.3
14.310.5
9.712.4
13.312.9
16.110.0
14.410.4
13.410.9
14.59.0
14.611.4
13.713.9
16.214.2
16.314.4
12.814.3
13.411.9
11.28.6
11.612.2
14.711.9
9.410.8
9.510.7
15.711.6
14.312.5
14.213.4
11.510.4
15.010.4
13.112.4
11.012.0
11.914.2
13.58.9
14.113.1
10.916.5
14.29.4
10.411.2
15.611.3
11.311.5
13.09.6
13.613.1
11.111.6
14.611.4
15.28.6
13.410.4
16.110.9
14.310.4
16.414.4
12.615.0
13.310.8
11.012.1
10.110.6
15.612.6
14.213.4
13.412.5
10.811.6
13.210.6
13.812.6
11.411.0
12.99.8
13.611.1
13.314.3
12.211.4
14.410.3
8.912.1
15.514.2
14.310.4
10.011.3
13.214.3
10.512.5
9.510.6
10.411.2
10.914.6
13.311.0
12.611.0
13.114.2
11.610.5
13.610.1
13.413.1
13.711.1
10.712.5
12.214.1
14.013.3
14.89.2
15.110.1
16.29.9
15.311.4
12.511.1
14.711.4
12.511.1
10.914.7
15.712.9
11.712.6
9.511.5
13.314.8
13.615.3
13.410.3
13.512.5
11.111.1
12.910.9
12.816.0
15.39.8
12.811.3
9.211.1
14.412.0
15.610.9
10.411.2
13.010.7
13.211.9
11.09.7
13.511.0
9.610.6
14.510.6
12.511.1
10.712.5
13.312.9
9.411.0
13.411.9
13.511.1
13.511.0
13.69.1
14.315.6
9.610.6
14.115.5
12.913.8
15.413.8
13.812.7
11.49.9
12.411.4
12.711.3
13.611.5
14.113.1
15.110.1
15.313.6
14.710.2
13.412.5
12.311.9
14.310.4
12.411.6
12.110.3
12.411.5
15.110.2
17.311.6
12.411.9
15.012.5

The table below gives the coordinates of 13 water pumps in London in 1854, relative to the same set of axes as the death coordinates.

Pumps
xy
8.717.9
11.018.5
13.417.4
14.917.8
8.714.9
8.912.8
12.611.7
10.77.4
13.58.0
16.49.3
18.99.7
16.05.0
9.05.1

Sources

Download Data

Click on the links below to download the data in tab-separated text format. This is a standard formats that can be imported into most statistical and spreadsheet software.