Inter American Geodetic Survey. North Decimal Degree -11.333333. South Decimal Degree -11.500000. East Decimal Degree -69.000000. West Decimal Degree -69.250000. Alternate title: Comunidad Fortaleza, Bolivia. Relief shown by 20 m. contour interval and spot heights. Universal transverse Mercator projection. Standard map series designation: Serie H731=[Series] H731. With key to abbreviations.