306 Main Library






Closed: 12/22/14-1/4/15. Reopen 1/5/2015: Mon-Friday 11am-5pm

Data for Library GIS workshop - Snow's Soho map

This is a presentation that takes John Snow's original map of cholera in Soho from 1854 and adds new visualizations.

John Snow's map of Soho

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.