Nice! You might also try, instead of a world map, using a human face as the base image, making expressions of expressions, so to speak.

Good idea! I know someone called Ross Atkins, who has half a beard for the sole purpose of determining whether an image of his face has been reflected. This, of course, is also applicable to affine transformations and the conformal/anticonformal maps explored on the cp4space post. Sincerely, Adam P. Goucher