Fortify method for map objects.
This function turns a map into a data frame that can more easily be plotted with ggplot2.
## S3 method for class 'map' fortify(model, data, ...)
model |
map object |
data |
not used by this method |
... |
not used by this method |
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")
}Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.