Pan American Institute of Geography and History. Committee on Special Maps. Canada. Mapping and Charting Establishment. North Decimal Degree -20.000000. South Decimal Degree -55.979722. East Decimal Degree -41.860000. West Decimal Degree -75.808333. Bipolar oblique conformal conic projection. Ancillary maps: Buenos Aires region (1:1,000,000); Valparaiso - Concepcion region (1:2,000,000); South America showing principal air routes (1:25,000). Verso: "Caminos censados en Brasil y Uruguay", notas explicatorias.