Amend, augment and aid the analysis of John Snow's cholera map.
Features:
Fixes three apparent coding errors in Dodson and Tobler's 1992 digitization of Snow's map.
"Unstacks" the data in two ways to make analysis and visualization easier and more meaningful.
Computes and visualizes "pump neighborhoods" based on Voronoi tessellation, Euclidean distance, and walking distance.
Ability to overlay graphical elements and features like kernel density, Voronoi diagrams, Snow's Broad Street neighborhood, and notable landmarks (John Snow's residence, the Lion Brewery, etc.) via add*() functions.
Includes a variety of functions to highlight specific cases, roads, pumps and paths.
Appends actual street names to roads data.
Includes the revised pump data used in the second version of Snow's map from the Vestry report, which includes the "correct" location of the Broad Street pump.
Adds two different aggregate time series fatalities data sets, taken from the Vestry report.
Support for parallel computation on Linux, macOS and Windows.
PWith 'cholera' version >= 0.8.0, preliminary and provisional support for georeferenced (longitude and latitude) versions of data and functions.
To learn more, see the vignettes:
vignette("duplicate.missing.cases")
vignette("kernel.density")
vignette("parallelization")
vignette("pump.neighborhoods")
vignette("roads")
vignette("tiles.polygons")
vignette("time.series")
vignette("unstacking.bars")