snow_maps
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Public water pumps and Cholera deaths in London 1854 (John Snow's Cholera Map)
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* SohoPeople.dbf: attribute data for Cholera deaths. (k=2)
* SohoPeople.prj: ESRI projection file.
* SohoPeople.sbn: spatial index.
* SohoPeople.sbx: spatial index.
* SohoPeople.shp: Point shapefile for Cholera deaths. (n=324)
* SohoPeople.shx: spatial index.
* SohoWater.dbf: attribute data for public water pumps. (k=1)
* SohoWater.prj: ESRI projection file.
* SohoWater.sbn: spatial index.
* SohoWater.sbx: spatial index.
* SohoWater.shp: Point shapefile for public water pumps. (n=13)
* SohoWater.shx: spatial index.
* Soho_Network.dbf: attribute data for street network. (k=1)
* Soho_Network.prj: ESRI projection file.
* Soho_Network.sbn: spatial index.
* Soho_Network.sbx: spatial index.
* Soho_Network.shp: Line shapefile for street network. (n=118)
* Soho_Network.shx: spatial index.

Original data: Snow, J. (1849). On the Mode of Communication of Cholera. London: John Churchill, New Burlington Street.