I am importing a 5M DEM.TIF surface file from GIS. They have already converted it from Meter to Foot, and fixed the Geo Coordinates. The surface should be the low 5000' Elevation, but I am getting it in the 16000'. I am creating Terrain from surface selecting the tif.
The apparent answer to this is
Defect 536259: Import Terrain from ERDAS IMG does not use the geo source correctly
In this defect, they also use the TIF to try to create the terrain and it had the same result with an incorrect location.
My work around was, hold on I am about to swear "I used Civil3d" imported the tif and exported it as a dem and created a surface from the C3D dem file.
I believe I have also used the Transform Surface command in InRoads to rescale the elevations while retaining the northing and easting values.
But I also found the source data was often too much for InRoads and had to use Descartes to select a sub area from the data before I could move forward.
Charles (Chuck) Rheault CADD Manager
MDOT State Highway Administration