Shurima city layout questions

I couldn't quite find these answers, or if they were inferred from the art, I couldn't make them out. If I'm wrong please correct. Relevant links to lore and posts are appreciated.

What I'm fairly certain of: -The irrigation system makes a half circle around the city, leading water into it. -The other half of the city has several large blocks extending out, that are actually inhabited, maybe like an ant colony.

Just some questions: -Is the bottom of the city, on the ground, below what can be seen in the paintings, inhabited, presumably with roads/houses/traders? -Roughly, how large is the city? -Do the pillars bridge to the center of the city? -Any clues on how many inhabitants?

Was thinking of doing a 3d model of it, but was unsure of the parts that cant be seen in the art.