The man Erik builds a route from scratch; goes through the arduous job to recreate a prototype... and YES, deals with the monotony and unpleasant task of guessing distance, height and the correct placement of track... why? That is because
THIS IS A HOBBY FOLKS, and some of us
[including me] prefer to create w/o the aid of DEM's and such, so one day I can sit back and say
"WOW!!! I have taken the prototype, and built this fine replica of it!" 
NOT
"Great! I have taken the prototype, and built this fine replica of it... well, except from the aid of those DEM's!"
or I have created a "prototype"
but had cloned the track!
Forgive me, but in my opinion a real prototype modeler does not use DEMS :mop:Those Model Railroad greats of "old", seeking to create a prototype(s); such as
John Allen, Linn Westcott, Tony Koester, and John Armstrong did not use DEMS; nor would they have if available at the time! As for Cyber Model Railroad Greats, of Trainz -as far as I know:
Philskene (with a few exceptions, on occasion adapting some RR's from a Track plan, such as that of Linn -a "DEM" in the sense of a "copy"),
Msgsapper, and Dave Snow DO NOT use DEM's!
And I, and many others on this forum consider it is an unspeakable offence for someone to come along and say derogatory, or negative comments about someone's hard work, and/or creative efforts; and not having created anything himself or contributed something to the community! It does not speak well of the person... and such people are viewed by this community, as nothing more than a
Troll!!! :n: