For me, I was able to visualise it all once I got into the text more. A map would definitely help those who key more off visual indicators, but I could imagine the world. It's quite complex and the addition of the society and races, as well as the planes and who they are populated by and accessed started to really pull it together. It's impressive.
The one thing that got me right off the bat is the opening of the cosmology information, and as this is at the beginning it feels there is something missing. "The planes immediately nearby are placed in four dimensional space." My first question was nearby to what? So perhaps there needs to be an anchor point to key off everything else, or a preamble to give us an immediate setting or placement. Keep in mind I have never read the opening to world-building so feel free to disregard if I'm off the mark. Also, what does ISMA stand for? I'm not sure if that needs to be put in this document or if it is made clear elsewhere.