Could we add a tube map diagram... for an example...
https://www.tubemaplondon.org/
The way I see it, there are 2 objects involved, I am not sure of the actual terminology.
Stations: Intersections, or points of interests, etc...
Lines: Roads, rivers, etc...
Both of these have a color and possibly a label.
Lines always start and stop on a station, or start on one and continue off "into the distance" or "off map".
Lines are always semi orthaginal (vertical, horizontal and 45deg only).
Stations might have an icon added to it.
Stations might have no visible indication, and I think this should be the default.
Stations might have an indication... circle, triangle, star, etc... as well as the icon associated with the text.
The semi orthagonal directions... N, S, E, W, NE, SE, NW, and SW
So I would see the format to be simply a listing of stations and lines.
Other existing syntax might be helpful... I don't see a lot of dotted lines in tube maps, but, I see no reason not to support it, also I only see plain text and icons, but creole would also handle the text icons for free?...
I feel like this deserves discussion about the actual syntax, as what I have listed, although I think is good enough, I am not 100% sure it is.
