R: Polygon for County Map of US South States: Alabama, Georgia,...

USSouthPolygon {colorspace} | 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. https://CRAN.R-project.org/package=maps

### Examples

    ## generate color palette
    pal <- diverging_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)])

[Package colorspace version 2.0-3 Index]