New Maps Inwards The Fourth Dimension Of Cholera

As nosotros approach the 201st birthday of British MD John Snow nosotros tin celebrate the occasion amongst a novel interactive version of his famous Broadstreet Pump map.

In 1854 Snow plotted the deaths caused past times cholera inwards the Soho expanse of London. The distribution of the dots helped Snow disclose that cholera occurred most ofttimes amid those who drank from the Broad Street H2O pump.

Kyle Walker's Broad Street Pump map overlays round off polygons over John Snow's master map. The polygons are scaled to exhibit the publish of cholera deaths recorded at each address. Kyle has created interactive map tiles from John Snow's master map, which agency you lot tin run across Snow's ain information on the map together with and the locations of the neighborhood's H2O pumps.

If you lot desire to exercise your ain map from John Snow's information together with thence bring a await at Robin's Blog. Robin Wilson has mapped John Snow's information onto an Ordnance Survey map together with every bit good made the information available via Google Fusion Tables.

If you lot desire to know to a greater extent than most how Kyle created his interactive John Snow map together with thence bring a await at his postal service on Using Custom Tiles inwards an RStudio Leaflet Map. The article explains how he created the map tiles from an icon file of John Snow's master map using gdal2tiles.