Add line legend to geom_sf

Question

I have a couple spatial shape files with various public transport routes and I would like to make a map using ggplot2 and sf libraries. The issue h

Answer 1

We can use the argument show.legend from geom_sf here.

ggplot() + 
 geom_sf(data= simple.lines.sf, aes(colour = as.factor(id)), show.legend = "line")

Description of show.legend from ?geom_sf

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes. You can also set this to one of "polygon", "line", and "point" to override the default legend.