label_len	OUT:	Maximum length of the label string
	unit_len	OUT:	Maximum length of the unit string
	format_len	OUT:	Maximum length of the format string
	coords_len	OUT:	Maximum length of the coordinate system string

	Purpose	Retrieves the lengths of the label, unit, format, and coordinate system strings.
	Return value	Returns SUCCEED (or 0) if successful and FAIL (or -1) otherwise.
	Description	The space allocated for the label, unit, format, and coordinate system strings must be at least one byte larger than the actual length of the string to account for the null termination.

	FORTRAN	integer function dsgdaln(label_len, unit_len, format_len, coords_len)
		integer label_len, unit_len, format_len, coords_len