Yes, but how is the height determined?  Do you plug in the values in the Motion panel, or in the Terrain Modeling room.  For instance, I bring in a terrain in a medium size scene setting.  The scaling is 100%, the "size" on the z axis is 5.70 m; in the Terrain Modeling room, the height is 4.57 m.  What is the relation between these two?  Why the discrepancy?  And which of these parameters does the terrain shader respond to?

Is it necessary to do unit conversions?  Say, 1 m = 1 km?

To Patrick:  How do you get a terrain to be at a height of 2000 ft?  How do you plug in the values?  In every variant in which I try to increase the height to 2000 ft, I get an EXTREMELY distorted terrain.  I've tried this in all scene settings with different units of measurement.