I should've noticed that, but that's not entirely what I'm looking for. I'd still like to see what the underground looks like for a normal and super-spire version of this embark, just for comparison. Perhaps not the entire thing, but one cave system and the bottom layers where everything went wrong (or right, depending on how you look at it)
Is the DF map archive still usable?
I can give you a verbal description of the revealed maps. The level numbers are in absolute. Ground level is 139 absolute for both maps.
My Spireless
Levels 76 through 80 are mix of slade walls, slade floors, and HFS.
Level 81 is semi-molten rock with adamantine plugs.
Levels 86 through 89 are mix of regular rock, magma seas, semi-molten rock, and adamantine plugs.
Levels 90 through 104 are a mix of regular rock, descreasing numbers of adamantine plugs, and a magma tube.
Levels 100 through 104 also have a cavern structure including some water.
Tallest plug ends at level 104, as does the magma tube.
Remainder omitted due to normality.
Spire
Levels -30 through 10 are mix of slade walls and HFS, with no slade floor, and some magmafalls.
Level 11 finally has some slade floors along with the rest.
Level 16 has a patchwork of regular rock, semi-molten rock, slade walls, and magmafalls.
Levels continue upward with decreasing slade walls being replaced by opens spaces.
Level 67 has first of the adamantine plugs, which do not even come close to sealing the open spaces.
The square core of the Space Elevator is not continuous. Every layer has a square core, but they do not line up, or even sometimes overlap. Note that part of the surface terrain around the Space Elevator is marked indoor even though it appears to be in the open. The game was pretty confused when it built this map. The tallest adamantine plug in my spireless map would emerge to the northeast of the wagon, about where the pond is on the spire map, so it is not the same as the spire. The patchwork structure of the spire map is missing from the spireless map.
I have seen patchworks underground before, where I have chosen a site with greatly differing biomes. One resulted in a magma sea falling into the HFS in several places and access to the HFS without breaching any adamantine plugs, but the structure of the map was otherwise normal. That is, no Space Elevators. I wonder if it is a division-by-zero thing, or some similar mathematical problem, which is handled differently between the two OS or even between chipsets?