Mapping London's Cholera Outbreak

Sooner or afterwards all online mapping platforms must travel used to recreate John Snow's 1854 point map of cholera deaths inwards London's Soho.

Snow plotted the deaths caused yesteryear cholera around Broad Street inwards Soho together with the place of 11 H2O pumps used yesteryear the locals. The distribution of the dots helped Snow notice that cholera occurred close oftentimes amid those who drank from the Broad Street H2O pump.

Snow's map helped to disprove the thence pop theory that diseases such every bit cholera together with bubonic plague were air borne together with spread yesteryear 'bad air'. These days John Snow's map seems to travel close used yesteryear neo-geographers to examination the capabilities of online mapping platforms.

This Esri map of John Snow's Map is a prissy illustration of how John Snow's information tin move travel used every bit information layers on a digital map. John Snow's Map uses an overlay of Snow's master map every bit 1 layer. The locations of the H2O pumps are available inwards some other layer together with the locations of the recorded deaths has been added every bit even thence some other layer.

For expert mensurate the map's creator has likewise added a Flickr layer to the map thence that yous tin move thought photos of the John Snow pub, the Broad Street H2O meat together with the John Snow plaque on Broad Street.

If yous desire to exercise your ain version of John Snow's map thence yous tin move catch the information inwards a break of formats from Robin's Blog. Robin's Blog has geo-coded the locations of the H2O pumps together with cholera deaths together with provides options to download the information every bit raster files, KML files or inwards a Google Fusion Table.