Polygon areas would be cool to see how big they are. I made this few years ago for Singapore https://observablehq.com/@cheeaun/golf-courses-in-singapore

That seems slightly pointless no? I mean Singapore is small enough already, there probably is 10 courses maximum. The one I've seen is the Changi course, and I don't think it can compare to the average course size in the States

good idea!