lonlat2map {oce} | R Documentation |
If a projection is already being used (e.g. as set by mapPlot
)
then only longitude
and latitude
should be given, and the
other arguments will be inferred by lonlat2map
. This is important
because otherwise, if a new projection is called for, it will ruin any
additions to the existing plot.
lonlat2map(longitude, latitude, projection = "")
longitude |
a vector containing decimal longitudes, or a list
containing items named |
latitude |
a vector containing decimal latitude (ignored if
|
projection |
optional indication of projection. This must be character
string in the format used by the |
A list containing x
and y
.
Dan Kelley
mapLongitudeLatitudeXY
is a safer alternative, if a map has
already been drawn with mapPlot
, because that function cannot
alter an existing projection. map2lonlat
is an inverse to
map2lonlat
.
Other functions related to maps: lonlat2utm
,
map2lonlat
, mapArrows
,
mapAxis
, mapContour
,
mapDirectionField
, mapGrid
,
mapImage
, mapLines
,
mapLocator
,
mapLongitudeLatitudeXY
,
mapPlot
, mapPoints
,
mapPolygon
, mapScalebar
,
mapText
, mapTissot
,
oceCRS
, shiftLongitude
,
utm2lonlat
## Not run: library(oce) ## Cape Split, in the Minas Basin of the Bay of Fundy cs <- list(longitude=-64.49657, latitude=45.33462) xy <- lonlat2map(cs, projection="+proj=merc") map2lonlat(xy) ## End(Not run)