How to fill map boundaries with external images?
问题 I am creating a map of Brazil with its state boundaries, which is straight forward to achieve using ggplot2 and geom_sf . However, this time around, instead of color filling each state with data, I want to fill each state's boundaries with an external image (png), similar to this example of the largest employer in each state. I have tried a few settings of geom_image and even geom_flag to no avail (hence why I am not posting any code here). Are there any suggestions on how to approach this