Laura Ellis shows how you can build maps full of little icons:
That was ok, but we should try to make the images more aesthetically pleasing using the magick package. We make each image transparent with the image_transparent() function. We can also make the resulting image a specific color with image_colorize().
I then saved the images using the image_write() function. I manually re-uploaded them to GH.
This was a great example of where laying icons on a map works.