We should be able to play with a copy of the dynmap or hdmaps currently on play.intersnout.com and implement the system to the production line when ready. Where are tricks like using signs with special formatting that could be read externally at the server side to generate "stations". Or vi could have different other ways to get the coords and some decent text from text-files, spreadsheats, web-based interfaces, databases, etc. Having junctions with coords named as sttations could we could play with the possibility to draw routes between the signs and also scale it by 8 and display the routes as an overlay to the overworld map. My talents are limited at java/javscript programming but this would be a route towards an automated nether subway map if anyone is up for the task.