I’ve been wondering why I didn’t see sliced optimal transport used to make cartograms, so this weekend I tried it. It worked reasonably well. My instance was down so I posted most of the experiments on Bluesky, but here’s the most elaborate one – red is population, green is Foursquare POI, and blue is modeled GDP (all normalized so there are ~2.5e6 of each): https://xoc.s3.amazonaws.com/also/five.mp4