I'm originally from Chicago, lived on the west side for 52 years (still got PTSD :hehe: ), and doing DEM for a Chicago route would be a pointless exercise anyway. Downtown is about 600 feet above sea level, O'Hare (5 miles north and 10 miles west) is 670, Midway (6 miles west and 6 miles south) is 620. In other words Chicago is pretty much flat even on windy days, so why bother with DEM at all? :wave:
I grew up near 40th Street yard on the C&NW Galena line (now UP/Metra west line) so that's the area I'm playing with, altho I'm doing a fictional route trying to capture the "flavor" of Chicago railroading rather than be true to any prototype. Here's a vid of my version of the L;
http://www.youtube.com/watch?v=mW6LjNpB51E
(ignore the last five minutes, for some reason the music repeated and got an extra 5 minutes of black screen)
Which will be different from present day, since before the Lake/Dan Ryan ("Green Line, or is it Pink Line now?) the Lake Street L used to turn right at Tower 18 and go counterclockwise around the Outer Loop, first stop Randolph & Wells, last stop in the Loop Clark & Lake. Also includes some stations that are gone today - Clinton, Halsted, Ashland, California, Kedzie, Homan, Pulaski, Cicero, Laramie, Central, etc. and don't include the new ones like the Garfield Park Conservatory stop.
Trying to do even a small part of Chicago is a huge project (after all, Chicago IS the railroad hub of the universe) so I'll be finishing all the detail on parts of it and uploading, then uploading newer versions as I expand. That's the best way to deal with it, otherwise you could work on it for 20 years and nobody would ever be able to play on it.