mapLines: Add Lines to a Map

In oce: Analysis of Oceanographic Data

Add Lines to a Map

Description

Plot lines on an existing map, by analogy to lines().

Usage

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().

Author(s)

Dan Kelley

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

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")
}

oce documentation built on Sept. 11, 2024, 7:09 p.m.