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 scene in which surfaces are defined by a single depth map, z(x) That is, all points below the surfaces are occupied

Area of the surface with a distinctive geological character.

Terrain, or relief, is the third or vertical dimension of land surface. When relief is described underwater, the term bathymetry is used. Topography has recently become an additional synonym, though in many parts of the world it retains its original more general meaning of description of place.