Determines if roadway point is above a surface.
public bool IsAboveSurface( ObjectId surfaceId, ObjectId alignmentId, IPoint point, double minimumAmountAbove )
Public Function IsAboveSurface ( surfaceId As ObjectId, alignmentId As ObjectId, point As IPoint, minimumAmountAbove As Double ) As Boolean
public: bool IsAboveSurface( ObjectId surfaceId, ObjectId alignmentId, IPoint^ point, double minimumAmountAbove )