- M. Nöllenburg: Automated Drawings of Metro Maps, 2005. We've used that a while ago to render a few pretty images with our graph visualization library, but runtime is prohibitive (along with the requirement of a fast ILP solver).
- LOOM: https://github.com/ad-freiburg/loom and https://loom.cs.uni-freiburg.de/global
I hope someone builds a web version of Mini Metro with this on top of OSM.
(Not affiliated, just a fan)
https://loom.cs.uni-freiburg.de/global#subway-lightrail/octi...
Schematization took around 2 minutes according to the statistics, it really doesn't look that bad.
I'd love to see a web map version of it based on real geography.
I wonder if anyone's tried running it with the Tokyo transit system.
https://www.yworks.com/assets/images/blog/tokyo.1e410d12c2.s...
There are more here in the article (clicking an image opens a slideshow): https://www.yworks.com/blog/automatic-metro-map-generation
That's only a very small fraction of the transit system in the Tokyo metro area. There's over 800 stations, and over 100 train lines.