I e-mailed a while ago about the PR that I was working on,
https://github.com/yt-project/yt/pull/1966, which supports geographic transforms and projections from cartopy in yt. At this point I think it's ready to merge and it's passing the checks. Both Nathan and Matt have looked over this quite a bit, so it'd be nice to get fresh eyes on it for review (it also needs 2 more approving reviews). Would any of you mind taking a look at it?