South American Datum

In today's article, we will explore the fascinating world of South American Datum. From its historical origin to its relevance in today's society, we will delve into a journey through the highlights of South American Datum. In addition, we will examine in depth its impact in different areas, from culture to technology. Through various perspectives and approaches, we aim to shed light on this topic that is so relevant today. Get ready to discover everything you need to know about South American Datum and immerse yourself in a comprehensive analysis of its importance in the contemporary world.

Geodesy
Fundamentals
Concepts
Technologies
Standards (history)
NGVD 29 Sea Level Datum 1929
OSGB36 Ordnance Survey Great Britain 1936
SK-42 Systema Koordinat 1942 goda
ED50 European Datum 1950
SAD69 South American Datum 1969
GRS 80 Geodetic Reference System 1980
ISO 6709 Geographic point coord. 1983
NAD 83 North American Datum 1983
WGS 84 World Geodetic System 1984
NAVD 88 N. American Vertical Datum 1988
ETRS89 European Terrestrial Ref. Sys. 1989
GCJ-02 Chinese obfuscated datum 2002
Geo URI Internet link to a point 2010

The South American Datum (SAD) is a regional historical geodetic datum for South America. The most common version was established in 1969 (SAD69), as adopted by the Pan American Institute of Geography and History.

It uses as reference ellipsoid the Geodetic Reference System 1967 (GRS-67), recommended by the International Union of Geodesy and Geophysics in Lucerne in 1967. This ellipsoid acquired topocentric orientation defined at the astrogeodetic vertex Chuá, in the municipality of Uberaba, Brazil.

This datum was subsequently adopted by many South American countries, including the earlier Brazilian Geodetic System (Sistema Geodésico Brasileiro - SGB). In most countries, SAD was recently replaced by SIRGAS; for example, in Brazil SIRGAS was adopted starting in 2005 and mandated since 2014.

References

  1. ^ Fischer, Irene (1970). "The Development of the South American Datum 1969". Survey Review. 20 (158). Informa UK Limited: 354–365. doi:10.1179/sre.1970.20.158.354. ISSN 0039-6265.
  2. ^ http://www.iugg.org/resolutions/zurich.pdf [bare URL PDF]
  3. ^ https://geoftp.ibge.gov.br/informacoes_sobre_posicionamento_geodesico/sirgas/sisref_2.pdf [bare URL PDF]
  4. ^ Sampaio, Antonio Carlos Freire; Sampaio, Adriany de Ávila Melo; Cerissi, Bruna Costa de Oliveira; Silva, Rafael Tiago dos Santos (2019-06-11). "VÉRTICE CHUÁ - SUA SITUAÇÃO E A NECESSIDADE DE PRESERVAÇÃO DE MONUMENTOS DA CARTOGRAFIA HISTÓRICA BRASILEIRA". Revista Brasileira de Cartografia (in Portuguese). 67 (4): 877–885. doi:10.14393/rbcv67n4-49126. ISSN 1808-0936. S2CID 196088639. Retrieved 2021-07-02.
  5. ^ "Transformation of Coordinates among Official Referential Systems". IBGE. 2005-02-25. Retrieved 2021-07-02.


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