dim	IN:	Dimension this scale corresponds to
	size	IN:	Size of the scale buffer
	scale	OUT:	Array of values defining reference points along a specified dimension

	Purpose	Gets the scale corresponding to the specified dimension.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The DFSD interface requires the dimension scales to be of the same data type as the corresponding data. To store dimension scales of a different data type than the corresponding data, use the multifile SD interface.

	FORTRAN	integer function dsgdisc(dim, size, scale)
		integer dim, size
		integer scale(*)