This week we finally get the overhead view of the Onigashima interior people have been asking for literally since the battle started. But what we're shown here actually raises a few new questions.
At a glance, I wasn't sure how to reconcile the view here with the mini maps shown during scene transitions previously.
But after a bit of looking and reviewing, I think I was actually reading the old maps a little wrong this whole time. There's still issues with the old map, but I think with this we've got it figured out.
The areas in grey below, I initially assumed to be large interior zones of what is labelled "Right Brain Tower" in the narration, but they're really just the walls of the dome. Solid rock, by the look of them. The only part that matters are the lines through each side, highlighted in red, which I now understand to be the long passages leading to the exterior that Franky fought Sasaki in and Big Mom chased Nami, Carrot and Shinobu down. They appear to have side rooms, but for the most part the Left and Right Brain structures are just straight lines.
But it still doesn't totally make sense. To match up with what's been shown in the actual manga, the minimap would need to be more oval-shaped. I played around with the warp tool in Photoshop and think I've tweaked it into something more accurate to the canon layout of the space, with a few main landmarks shown for complete clairty.
However, I made a post back in November (holy shit, we've been doing this for a while) looking at how consistently Oda tracked battle damage and character locations across the battlefield and it's still spot on here. This map shows the tower Zoro cut down, the place Yamato's handcuffs exploded and the path of Big Mom's attack on the Performance Floor right where they should be. It's also cool being able to spot the Pleasure Hall, the back entrance to the dome and the trench blasted by Kaido and Big Mom's combined attack on the roof on the overhead shot of the island flying on the next page.
The one minor thing that triggers my OCD is that the castle entrance is for some reason to the left.
At least it explains why the basement is technically the first floor though (instead of the actual first floor). The entrance door is part of the rocky foundation.