addWhitehead: Add Rev. Henry Whitehead's Broad Street pump neighborhood.

In cholera: Amend, Augment and Aid Analysis of John Snow's Cholera Map

Add Rev. Henry Whitehead's Broad Street pump neighborhood.

Description

A circle (polygon), centered around a desired pump with a radius of 210 yards. The Broad Street pump is the default.

Usage

addWhitehead(pump = "Broad Street", radius = 210, distance.unit = "yard",
  color = "black", line.type = "solid", vestry = FALSE,
  add.subtitle = FALSE, walking.speed = 5)

Arguments

pump	Character or Numeric. Name (road name) or numerical ID of selected pump. See pumps or pumps.vestry.
radius	Numeric. Distance from a pump.
distance.unit	Character. Unit of distance: "meter", "yard" or "native". "native" returns the map's native scale. See vignette("roads") for information on conversion.
color	Character. Color of circle.
line.type	Character. Circle line type.
vestry	Logical. TRUE uses the 14 pumps and locations from Vestry report. FALSE uses original 13 pumps.
add.subtitle	Logical. Add subtitle with estimated "walking" time in seconds.
walking.speed	Numeric. Walking speed in km/hr.

Value

Adds a circle (polygon) to a graphics plot.

Examples

snowMap(add.landmarks = FALSE)
addWhitehead()

cholera documentation built on March 7, 2023, 5:31 p.m.