create_scale_bar: 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 scale bar.

Usage

create_scale_bar(lon, lat, distance_lon, distance_lat, distance_legend, dist_units = "km")

Arguments

lon, lat	longitude and latitude of the bottom left point of the first rectangle to draw
distance_lon	length of each rectangle
distance_lat	width of each rectangle
distance_legend	distance between rectangles and legend texts
dist_units	units of distance "km" (kilometers) (default), "nm" (nautical miles), "mi" (statute miles)

Value

Return a list whose elements are :

rectangle	a data.frame containing the coordinates to draw the first rectangle
rectangle2	a data.frame containing the coordinates to draw the second rectangle
legend	a data.frame containing the coordinates of the legend texts, and the texts as well

Author(s)

Ewen Gallic

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