Scholarly Commons
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This is a presentation that takes John Snow's original map of cholera in Soho from 1854 and adds new visualizations.
John Snow's 1854 map of Soho London.
Presentation - ArcMap example: Georeferencing, creating point shape files, Thiessen/Voroni polygons, Hot Spots
The map with people and pumps layers is here.
A Base map is here.