ElevationGrid

Definition :
ElevationGrid { 
  eventIn      MFFloat  set_height
  exposedField SFNode   color             NULL
  exposedField SFNode   normal            NULL
  exposedField SFNode   texCoord          NULL
  field        MFFloat  height            []
  field        SFBool   ccw               TRUE
  field        SFBool   colorPerVertex    TRUE
  field        SFFloat  creaseAngle       0
  field        SFBool   normalPerVertex   TRUE
  field        SFBool   solid             TRUE
  field        SFInt32  xDimension        0
  field        SFFloat  xSpacing          0.0
  field        SFInt32  zDimension        0
  field        SFFloat  zSpacing          0.0
}
Explanation :

The ElevationGrid node specifies a uniform rectangular grid of varying height in the XZ plane of the local coordinate system. The geometry is described by a scalar array of height values that specify the height of a rectangular surface above each point of the grid.

color :
normal :
texCoord :
height :
ccw :
colorPerVertex : defines what kind of color is going to be used for each polygon and vertices. This controls all the possible coloring strategies.
creaseAngle :
normalPerVertex :
solid :
xDimension :
xSpacing :
zDimension :
zSpacing :