Yep. We'll be adding a mapmaking system at some point that basically lets you do this same sort of thing in-game, and jot down little maps and notes as you go.
This sounds really interesting, is there plans to make user made maps tradeable in game so that one can make some trias with making maps, but maps would stay in game as items or similar?
That could make interesting ingame aspect, there might be rumour about certain player made maps which are more wanted than other maps.