Plot lines on an existing map, by analogy to lines().
mapLines(longitude, latitude, greatCircle = FALSE, ...)Arguments
- longitude
numeric vector of longitudes of points to be plotted, or an object from which longitude and latitude can be inferred (e.g. a coastline file, or the return value from
mapLocator()), in which case the following two arguments are ignored.- latitude
vector of latitudes of points to be plotted.
- greatCircle
a logical value indicating whether to render line segments as great circles. (Ignored.)
- ...
optional arguments passed to
lines().
See also
A map must first have been created with mapPlot().
Other functions related to maps:
formatPosition(),
lonlat2map(),
lonlat2utm(),
map2lonlat(),
mapArrows(),
mapAxis(),
mapContour(),
mapCoordinateSystem(),
mapDirectionField(),
mapGrid(),
mapImage(),
mapLocator(),
mapLongitudeLatitudeXY(),
mapPlot(),
mapPoints(),
mapPolygon(),
mapScalebar(),
mapText(),
mapTissot(),
oceCRS(),
oceProject(),
shiftLongitude(),
usrLonLat(),
utm2lonlat()
Examples
# \donttest{
if (utils::packageVersion("sf") != "0.9.8") {
# sf version 0.9-8 has a problem with this projection
library(oce)
data(coastlineWorld)
mapPlot(coastlineWorld,
type = "l",
longitudelim = c(-80, 10), latitudelim = c(0, 120),
projection = "+proj=ortho +lon_0=-40"
)
lon <- c(-63.5744, 0.1062) # Halifax CA to London UK
lat <- c(44.6479, 51.5171)
mapPoints(lon, lat, col = "red")
mapLines(lon, lat, col = "red")
}
# }