PMRG – South American Geocentric Reference System (Final Report)

The SIRGAS (Sistema de Referência Geocêntrico para a América do Sul) Project was initiated at the International Conference for the Definition of a South American Geocentric Datum, convened from 4 through 7 October 1993, in Asuncion, Paraguay, by invitation of the International Association of Geodesy - IAG, the Pan-American Institute of Geography and History - PAIGH and the United States Defense Mapping Agency - DMA (now, National Imagery and Mapping Agency - NIMA). Representatives of the three sponsoring organizations and of almost all South American countries participated in that Conference.