Very cool. I remember liking trains.fyi when it went around HN a while back, keep up the good work and thank you for sharing such cool projects!
My antiquated (2016 xeon quad-core) PC chugged for a while running this in Firefox (snap) on Ubuntu, and it eventually crashed while I was angling the map close to the ground. CPU cranked up to 80% on each core.
A few questions: - While angling around, it was easy to go under the map, could you set a boundary so the camera cannot go below the horizon? - Would you be able to add the ability to enter an address, so I can get a view that would be comparable to what I'd see if I stood in that same place outside? Maybe you could even add an AR element similar to the SkyMap app on Android.