Sooner or after all online mapping platforms must travel used to recreate John Snow's 1854 point map of cholera deaths inward London's Soho.
Snow plotted the deaths caused past times cholera closed to Broad Street inward Soho as well as the place of xi H2O pumps used past times the locals. The distribution of the dots helped Snow discover that cholera occurred close oftentimes amidst those who drank from the Broad Street H2O pump.
Snow's map helped to disprove the as well as hence pop theory that diseases such equally cholera as well as bubonic plague were air borne as well as spread past times 'bad air'. These days John Snow's map seems to travel close used past times neo-geographers to examination the capabilities of online mapping platforms.
This Esri map of John Snow's Map is a overnice illustration of how John Snow's information tin travel used equally information layers on a digital map. John Snow's Map uses an overlay of Snow's master map equally ane layer. The locations of the H2O pumps are available inward some other layer as well as the locations of the recorded deaths has been added equally even hence some other layer.
For proficient stair out the map's creator has likewise added a Flickr layer to the map hence that you lot tin sentiment photos of the John Snow pub, the Broad Street H2O center as well as the John Snow plaque on Broad Street.
If you lot desire to practice your ain version of John Snow's map as well as hence you lot tin choose handgrip of the information inward a expose of formats from Robin's Blog. Robin's Blog has geo-coded the locations of the H2O pumps as well as cholera deaths as well as provides options to download the information equally raster files, KML files or inward a Google Fusion Table.
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