Last data update: 2014.03.03
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R: Polygon for County Map of US South States: Alabama, Georgia,...
USSouthPolygon | R Documentation |
Polygon for County Map of US South States: Alabama, Georgia, and South Carolina
Description
County polygons for Alabama, Georgia, and South Carolina plus an artifical
variable used for coloring.
Usage
data("USSouthPolygon")
Format
A data frame with coordinates of the vertices of the county polygons
(x , y ) and an artificial variable z constructed
for illustrating colored maps.
Source
Polygon data taken from maps package of Becker, Wilks, Brownrigg,
and Minka (2012). Version 2.2-6. http://CRAN.R-project.org/package=maps
Examples
## generate color palette
pal <- diverge_hcl(9)
n <- length(pal)
## draw shaded polygons
plot(0, 0, type = "n", xlab = "", ylab = "", xaxt = "n", yaxt = "n", bty = "n",
xlim = c(-88.5, -78.6), ylim = c(30.2, 35.2), asp = 1)
polygon(USSouthPolygon, col = pal[cut(na.omit(USSouthPolygon$z), breaks = 0:n/n)])
Results
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