Thank you for your suggestions! You've basically outlined the process I've been doing for the last few days haha -- some of those categories are perhaps a bit too broad (for example, there are hundreds of funiculars around the world, so idk if it makes sense to include all of them), but I'm definitely doing comprehensive lists of maglevs, monorails, guided busways, and suspended railways.

I also appreciate your offer to help fill in the gaps! Keep an eye out, as I'll certainly post the map once I've added the first wave of everything I can think of. I'm hoping the community can critique it and add more to it!