Chicago Skyline 3D Map

3D map of Chicago. The intent was to slice it into tiles for printing in sections - maps like this have been posted on social media sites but with no STLs and no workflow, so I wanted to offer both and maybe spark someone else to do a better job, but a hospital stay has me moving slowly for now. Here is the data I got done so far:

Google's 3D data is proprietary, and ripping geometry from Google Earth like this is sort of a hack. I've done it before and it works, but the tools only work on Windows and IMO it's a rather messy process. OpenStreetMap also features accurate building height data like Google does, and while their models usually aren't as detailed as Google's (Google stores actual 3D models whereas OSM stores flat geometric shapes that have height data attached so they can be represented in 3D), it's free for the taking and the tools for doing so are much more straightforward. Also, I've found that the resultant geometry is much cleaner.

So here's what I do in case an