A tract of ground regarding its topographical features or fitness for some use.

Use of natural terrain features prominently in the ride.

Terrain is the way Rail3D 2kD models the shape of the surface of the Earth. Unlike previous versions of Rail3D, there is no ground plane - your track will simply be floating in space until you add some terrain to your layout.

A terrain is the graph of a continuous function that assigns to every point on the plane an elevation.

a tract or region of the earth's surface considered as a physical feature.

a piece of ground having specific characteristics or military potential; "they decided to attack across the rocky terrain"

Continuos, editable ground, that can have raised or lowered sections by modifying its elevation grid

An area of ground, considered as to its extent and natural features, in relation to its use in a particular operation.

A region of the earthâ€(tm)s surface that is treated as a physical feature or as a type of environment.