Maps Inwards The Fourth Dimension Of Cholera

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

In 1854 Snow plotted the deaths caused past times cholera inwards the Soho surface area of London. The distribution of the dots helped Snow respect that cholera occurred most oft alongside those who drank from the Broad Street H2O pump.

Kyle Walker's Broad Street Pump map overlays round down polygons over John Snow's master copy map. The polygons are scaled to present the discover of cholera deaths recorded at each address. Kyle has created interactive map tiles from John Snow's master copy map, which agency yous tin encounter Snow's ain information on the map together with and the locations of the neighborhood's H2O pumps.

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

If yous desire to know to a greater extent than close how Kyle created his interactive John Snow map thus bring a await at his post service on Using Custom Tiles inwards an RStudio Leaflet Map. The article explains how he created the map tiles from an picture file of John Snow's master copy map using gdal2tiles.