For InRoads XM+ .dtm, .alg, .itl, .ird, .sdb, .fwd, and .xin
Sometime it is nice to just submit a simple .itl file but I know when I have uploaded a dataset zipping the files reduces the size greatly, especially the xin file.
Thanks Phil.
Neil Wilson (aka Neilw)
Power Civil v8i 08.11.07.245
AutoCAD Civil 3D 2018