Let me modify my question :
What I am doing at present is to set the elevation of the first baseboard in Edit environment > Location > Edit World Origin > Elevation (416).
Then lay the tracks and set the gradient to 0.57.
Get the next vertex (track) height say 425 and put it in to F1 > Get height.
Then use the Plateau tool and raise the baseboard to that height, Then use the Smooth spline height tool and adjust the track.
Is this the correct way ?
Using transdem seems to be laborious.
Thanks
tupuluruk