Add center line (generic)

Generic for adding a center meridian line to a map plot.

Usage

add_center_line(x, ...)

# S3 method for class 'MapLayers'
add_center_line(x, ...)

Arguments

x

A MapLayers object.

...

Further arguments passed to methods.

Details

For MapLayers, add_center_line() draws a vertical center meridian at longitude 0 (plot coords).