oce (version 1.2-0)

shiftLongitude: Shift Longitude to Range -180 to 180

Description

This is a utility function used by mapGrid(). It works simply by subtracting 180 from each longitude, if any longitude in the vector exceeds 180.

Usage

shiftLongitude(longitudes)

Arguments

longitudes

a numerical vector of longitudes

Value

vector of longitudes, shifted to the desired range.

See Also

matrixShiftLongitude() and standardizeLongitude().

Other functions related to maps: formatPosition(), lonlat2map(), lonlat2utm(), map2lonlat(), mapArrows(), mapAxis(), mapContour(), mapCoordinateSystem(), mapDirectionField(), mapGrid(), mapImage(), mapLines(), mapLocator(), mapLongitudeLatitudeXY(), mapPlot(), mapPoints(), mapPolygon(), mapScalebar(), mapText(), mapTissot(), oceCRS(), usrLonLat(), utm2lonlat()