A Preliminary Map of the Railsea

Update: A Working Map

I have wanted to create a map of the Railsea for a long time now. Today I gave in & started. Note that this is very much work in progress!
Now, a re-read is in order, with the map at hand, to try & fill in some names. (The south-western landmass ought to be Manihiki, I guess?)

southern marking: Streggeye Land
northern marking: speculative position of the abyss