New mod - 'System Mapper'. A zero slot device, installed similar to the patch spider. Once installed, use 'use' then 'h' to map. It will map friendly stations, with a slight chance of mapping enemy stations. It should show up in the mid-game. However, I've not tested that fully; you can order it from the Corporate Trading Posts.
Why? I didn't even know where to start to write a mod that would affect EVERY station to provide it as an option.
And, I find it silly that you can't just ask the same information from a friendly station... Let's face it - every station has presumably been there for a while, and we see freighters going back and forth between them and the star gates. Why not have it as an option on the dock screens?
...ok, rant over. Mod is on Xelerus, as are my others.