ggplot2 (version 2.1.0)

fortify.map: Fortify method for map objects.

Description

This function turns a map into a data frame that can more easily be plotted with ggplot2.

Usage

"fortify"(model, data, ...)

Arguments

model

map object

data

not used by this method

...

not used by this method

See Also

map_data and borders

Examples

if (require("maps")) {
ca <- map("county", "ca", plot = FALSE, fill = TRUE)
head(fortify(ca))
ggplot(ca, aes(long, lat)) +
  geom_polygon(aes(group = group))

tx <- map("county", "texas", plot = FALSE, fill = TRUE)
head(fortify(tx))
ggplot(tx, aes(long, lat)) +
  geom_polygon(aes(group = group), colour = "white")
}