mercator: Mercator projection

In geo: Draw and Annotate Maps, Especially Charts of the North Atlantic

Description

Mercator projection.

Usage

mercator(lat, lon, scale = "km", b0 = 65)

Arguments

lat,lon	Coordinates as latitude and longitude vectors
scale	Scale of the output, "km" default, all other values imply nautical miles.
b0	Latitude defining the projection.

Value

List of components:

lat, lon	Coordinates in latitude and longitude
x, y	Input coordinates (projected)
scale	Scale
projection	Projection (stated redunantly)
b0, L0	Defining lat and a null value ???

is returned invisibly.

Note

Needs elaboration, could/should (?) be documented with other projection functions.

See Also

Called by geoarea, gridaxes and Proj.

geo documentation built on May 29, 2017, 5:36 p.m.