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% Generated by roxygen2 (4.0.1): do not edit by hand
\name{fortify.map}
\alias{fortify.map}
\title{Fortify method for map objects.}
\usage{
\method{fortify}{map}(model, data, ...)
}
\arguments{
\item{model}{map object}
\item{data}{not used by this method}
\item{...}{not used by this method}
}
\description{
This function turns a map into a data frame that can more easily be
plotted with ggplot2.
}
\examples{
if (require("maps")) {
ca <- map("county", "ca", plot = FALSE, fill = TRUE)
head(fortify(ca))
qplot(long, lat, data = ca, geom = "polygon", group = group)
tx <- map("county", "texas", plot = FALSE, fill = TRUE)
head(fortify(tx))
qplot(long, lat, data = tx, geom = "polygon", group = group,
colour = I("white"))
}
}
\seealso{
\code{\link{map_data}} and \code{\link{borders}}
}
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