1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
|
\name{coord_map}
\alias{coord_map}
\alias{CoordMap}
\title{coord\_map}
\description{Map projections}
\details{
This coordinate system provides the full range of map projections available in the mapproj package.
This is still experimental, and if you have any advice to offer regarding a better (or more correct) way to do this, please let me know
This page describes coord\_map, see \code{\link{layer}} and \code{\link{qplot}} for how to create a complete plot from individual components.
}
\usage{coord_map(projection = "mercator", orientation = NULL, xlim = NULL,
ylim = NULL, fast = TRUE, ...)}
\arguments{
\item{projection}{projection to use, see ?mapproject for complete list}
\item{orientation}{orientation, which defaults to c(90, 0, mean(range(x))). This is not optimal for many projections, so you will have to supply your own.}
\item{xlim}{x limits}
\item{ylim}{y limits}
\item{fast}{NULL}
\item{...}{other arguments passed on to mapproject}
}
\seealso{\itemize{
\item \url{http://had.co.nz/ggplot2/coord_map.html}
}}
\value{A \code{\link{layer}}}
\examples{\dontrun{
try_require("maps")
# Create a lat-long dataframe from the maps package
nz <- data.frame(map("nz", plot=FALSE)[c("x","y")])
(nzmap <- qplot(x, y, data=nz, geom="path"))
nzmap + coord_map()
nzmap + coord_map(project="cylindrical")
nzmap + coord_map(project='azequalarea',orientation=c(-36.92,174.6,0))
states <- data.frame(map("state", plot=FALSE)[c("x","y")])
(usamap <- qplot(x, y, data=states, geom="path"))
usamap + coord_map()
# See ?mapproject for coordinate systems and their parameters
usamap + coord_map(project="gilbert")
usamap + coord_map(project="lagrange")
# For most projections, you'll need to set the orientation yourself
# as the automatic selection done by mapproject is not available to
# ggplot
usamap + coord_map(project="orthographic")
usamap + coord_map(project="stereographic")
usamap + coord_map(project="conic", lat0 = 30)
usamap + coord_map(project="bonne", lat0 = 50)
}}
\author{Hadley Wickham, \url{http://had.co.nz/}}
\keyword{hplot}
|
