Penrose tiling is cool: you completely cover a surface with choices from a limited set (there are 3 possible sets) of geometric shapes chosen so that there are zero repeating patterns (I can’t wait until I see these for sale at Home Depot). Anyway …
Here’s some tilings of the U.S. shaded with data.
The one above shows population density. The one below shows the type of groundcover.
I’m personally amused by the next one. It’s shaded with sales of the blog author’s (excellent geography) book.
I can’t help but thinking that one of those isolated lighter colored blocks in the southwest is yours truly.
I don’t think these serve much purpose, other than to be quirky and interesting. Isn’t that enough?
Via Something About Maps.