export declare enum SurfaceExpression {
    'Hummocky' = 0,
    'Level' = 1,
    'Inclined' = 2,
    'Rolling' = 3,
    'Ridged' = 4,
    'Steep' = 5,
    'Terraced' = 6,
    'Undulating' = 7,
    'Veneer' = 8,
}