add a custom legend

Wrapper around legend that allows adding a custom legend to a map using a keyword such as "topleft" or "bottomright". This function will place the legend in the locations within the mapped area as delineated by the axes.

Usage

add_legend(x, y, ...)

Arguments

x

The keyword to be used to position the legend (or the x coordinate)

y

The y coordinate to be used to position the legend (is x is also a coordinate)

...

arguments passed to legend

Examples

v <- vect(system.file("ex/lux.shp", package="terra"))
plot(v)
points(centroids(v), col="red")
legend("topleft", legend = "centroids", pch = 20, xpd=NA, bg="white", col="red")
add_legend("topright", legend = "centroids", pch = 20, col="red")