Vietnam Map Series: Relief shown by contours at 5, 10, and 20 meter intervals with 5 or 10 meter supplementary contours, at 25 meterintervals with 12.5 meter supplementary contours, at 40 meter intervals and by form lines; elevations in meters; foreshore and offshore detail shown; depths in meters; drainage symbolized; standing water area indicated, international, phan, and tinh boundaries. ProvisionalMilitary Demarcation Line delineated; quan boundaries delineated in Index to Boundaries south of 17 degrees, populated places symbolized and classified by importance; roads classified by weatherability, surface, and width; railroads classified by gauge and number of tracks; airfields delineated and classified by weatherability; vegetation symbolized, trilingual marginal data (English, French,