create_orientation_arrow: Creates a list containing coordinates for the orientation...

In 3wen/legendMap: North arrow and scale bar for ggplot2 graphics.

Description

Using an object returned by the scale_bar() function, returns a list with all necessary coordinates to plot the North arrow.

Usage

create_orientation_arrow(scale_bar, length, distance = 1, dist_units = "km")

Arguments

scale_bar	result of create_scale_bar()
length	desired length of the arrow
distance	distance between legend rectangles and the bottom of the arrow
dist_units	units of distance "km" (kilometers) (default), "nm" (nautical miles), "mi" (statute miles).

Value

Returns a list containing :

res	coordinates to draw an arrow
coords_n	coordinates of the middle of the arrow (where the "N" will be plotted)

Author(s)

Ewen Gallic.

3wen/legendMap documentation built on May 5, 2019, 10:45 a.m.