Inter American Geodetic Survey. North Decimal Degree -11.833333. South Decimal Degree -12.000000. East Decimal Degree -68.5000000. West Decimal Degree -68.750000. Alternate title: Barraca Bay, Bolivia. Relief shown by 20 m. contour interval and spot heights. Universal transverse Mercator projection. Standard map series designation: Serie H731=[Series] H731. With a key to abbreviations.