^ I make stuff up a lot.
One tool that is really helpful though is Match Photo. It's talked about starting on page 16 of the pdf at
this link or in
this video.
You need a building with at least one 90degree corner, and one wall that has a known length. For the butterdome you'd probably start with the south elevation along 87ave side which looks to be about 355'.
You'd take a photo from 87ave facing either NE or NW - just something that gives you a good view of the
whole south elevation, along with bits of either the east or west elevation.
Throw that picture into Match Photo, set up the perspective, and trace over top. That gives you a rough massing of the building. Then you scale that massing so that the south side equals 355', and you're basically good. All of the vertical dimensions will now be accurate-ish.
You can use Match Photo to make the models directly, but I usually just use it as a reference. "Match Photo says that the 1st floor is 12.189' tall...I think I'll go with 12'."