Cartographic transformations in ArcGIS for South America

ArcGIS offers a number of geographic transformations between coordinates in the older Prov South American Datum of 1956 (PSAD56) and the modern WGS 1984 datum.

ESRI Press has published a book on this topic titled "Lining Up Data", 2010.

Finding the PSAD1956 datum in ArcGIS

The PSAD1956 datum is supported in ArcGIS. The coordinate system settings are found under Coordinate System menus under UTM (Universal Transverse Mercator)

Predefined > Projected Coordinates > UTM > Other GCS > Prov. S. Amer Datum, UTM Zone X (Northern or Southern hemisphere).

You need to know what UTM zone your data falls in before you can apply a UTM Coordinate System to it in ArcGIS. A UTM Zone reference map is available online.

Geographic Coordinate System (Latitude/Longitude) or "unprojected"

Predefined > Geographic > South America > La Canoa

The PSAD1956 datum is commonly referred to as La Canoa the geographical coordinate system.


In the Geographic Transformation box in ArcGIS various transformations become available.

With PSAD56 - WGS84, commonly used with UTM data in Andean South America, there are 13 available transformations.


Transform box


   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

It is not obvious, but to go from WGS1984 to PSAD1956 (the reverse direction) you must pick one of those transformations as well. The software knows which way to sign the transformation based on the reference system of the original dataset.

An average of Andean South America transformations is provided by

  • PSAD_1956_To_WGS_1984_1

The recommended transformation for PSAD56-WGS84 for Bolivian UTM data is

  • PSAD_1956_To_WGS_1984_2

and for Peruvian UTM data it is

  • PSAD_1956_To_WGS_1984_8

for other South American countries see the ESRI Projected Coordinate Systems for South America at the bottom of this webpage.
 

 


Further resources

  • A series of articles published in Photogrammetric Engineering and Remote Sensing called "Grids & Datums" covers cartographic datums and historical mapping in various countries around the world. Many South American countries are included in the list.

Below is a list of the appropriate transformation to use by country from the ArcGIS "Geographic Transformations.PDF" help file.

Area of use ArcGIS Transformation Name Code
Argentina Campo_Inchauspe_To_WGS_1984 1127
Argentina POSGAR_1998_To_SIRGAS_1 1774
Argentina POSGAR_1998_To_WGS_1984_1 1773
Argentina SAD_1969_To_WGS_1984_1 1864
Argentina SAD_1969_To_WGS_1984_2 1865
Argentina - Neuquen Province, Campo_Inchauspe_To_WGS_1984_ 1527
Chos Malal Area Argentina - Neuquen Province, Chos_Malal_1914_To_Campo_Inchauspe 1528
Chos Malal Area Argentina - Neuquen Province, Chos_Malal_1914_To_WGS_1984 8517
Chos Malal Area Argentina - Tierra Del Fuego Hito_XVIII_1963_To_WGS_1984 1529
Bolivia PSAD_1956_To_WGS_1984_1 1201
Bolivia PSAD_1956_To_WGS_1984_2 1202
Bolivia SAD_1969_To_WGS_1984_1 1864
Bolivia SAD_1969_To_WGS_1984_3 1866
Bolivia - block 20 PSAD_1956_To_WGS_1984_11 1583
Bolivia - Madidi PSAD_1956_To_WGS_1984_10 1582
Brazil Corrego_Alegre_To_WGS_1984 1132
Brazil SAD_1969_To_WGS_1984_1 1864
Brazil SAD_1969_To_WGS_1984_4 1867
Brazil SAD_1969_To_WGS_1984_14 1548
Brazil - Campos, Espiritu Santo, Santos Basin Aratu_To_WGS_1984_1 1549
Brazil - offshore Amazon cone PSAD_1956_To_WGS_1984_12 1811
Brazil - Tucano Basin North Aratu_To_WGS_1984_2 1550
Brazil - Tucano Basin Central Aratu_To_WGS_1984_3 1551
Brazil - Tucano Basin South Aratu_To_WGS_1984_4 1552
Chile SAD_1969_To_WGS_1984_1 1864
Chile SAD_1969_To_WGS_1984_5 1868
Chile (Northern, near 19 S) PSAD_1956_To_WGS_1984_3 1203
Chile (Southern, near 43 S) PSAD_1956_To_WGS_1984_4 1204
Chile - Tierra del Fuego Hito_XVIII_1963_To_WGS_1984_2 1892
Colombia Bogota_Bogota_To_Bogota 1755
Colombia Bogota_Bogota_To_WGS_1984 8174
Colombia Bogota_To_WGS_1984 1125
Colombia PSAD_1956_To_WGS_1984_1 1201
Colombia PSAD_1956_To_WGS_1984_5 1205
Colombia SAD_1969_To_WGS_1984_1 1864
Colombia SAD_1969_To_WGS_1984_6 1869
Colombia - Casanare, BP Bogota_To_WGS_1984_2 1597
Cusiana/Cupiagua Field Areas Ecuador PSAD_1956_To_WGS_1984_1 1201
Ecuador PSAD_1956_To_WGS_1984_6 1206
Ecuador SAD_1969_To_WGS_1984_1 1864
Ecuador SAD_1969_To_WGS_1984_7 1870
Ecuador (Baltra, Galapagos) SAD_1969_To_WGS_1984_8 1871
Falkland Islands (East Falkland Island) Sapper_Hill_1943_To_WGS_1984 1225
French Guiana CSG_1967_To_RGFG_1995_1 1908
French Guiana CSG_1967_To_WGS_1984_1 1906
French Guiana RGFG_1995_To_WGS_1984_1 1907
Guyana PSAD_1956_To_WGS_1984_1 1201
Guyana PSAD_1956_To_WGS_1984_7 1207
Guyana SAD_1969_To_WGS_1984_1 1864
Guyana SAD_1969_To_WGS_1984_9 1872
Paraguay Chua_To_WGS_1984 1131
Paraguay SAD_1969_To_WGS_1984_1 1864
Paraguay SAD_1969_To_WGS_1984_10 1873
Peru PSAD_1956_To_WGS_1984_1 1201
Peru PSAD_1956_To_WGS_1984_8 1208
Peru SAD_1969_To_WGS_1984_1 1864
Peru SAD_1969_To_WGS_1984_11 1874
South America POSGAR_To_WGS_1984_1 1598
South America SIRGAS_To_WGS_1984_1 1581
Suriname Zanderij_To_WGS_1984 1235
Trinidad Naparima_1955_To_WGS_1984_2 1555
Trinidad Naparima_1955_To_WGS_1984_3 1556
Trinidad and Tobago Naparima_1972_To_WGS_1984 1192
Trinidad and Tobago Naparima_1972_To_WGS_1984_2 8212
Trinidad and Tobago Naparima_1972_To_WGS_1984_3 1307
Trinidad and Tobago SAD_1969_To_WGS_1984_1 1864
Trinidad and Tobago SAD_1969_To_WGS_1984_12 1875
Trinidad and Tobago Trinidad_1903_To_WGS_1984 1296
Uruguay Yacare_To_WGS_1984 1234
Venezuela La_Canoa_To_REGVEN_1 1771
Venezuela La_Canoa_To_SIRGAS 108217
Venezuela La_Canoa_To_WGS_1984_2 1096
Venezuela PSAD_1956_To_REGVEN 1769
Venezuela PSAD_1956_To_WGS_1984_9 1209
Venezuela PSAD_1956_To_WGS_1984_1 1201
Venezuela PSAD_1956_To_WGS_1984_13 1095
Venezuela REGVEN_To_SIRGAS_1 1767
Venezuela REGVEN_To_WGS_1984_1 1768
Venezuela SAD_1969_To_WGS_1984_1 1864
Venezuela SAD_1969_To_WGS_1984_13 1876
Venezuela - Delta Amacuro, Anzoategui, La_Canoa_To_WGS_1984 1516
Bolivar, Monagas, Sucre States  

 


Projected Coordinate Systems - South America

This table is pasted from the ESRI Map Projection Tables.

Country/Area  Longitudinal Limit
Transformation Code

South America

 

102032 South_America_Equidistant_Conic

South America

 

102033 South_America_Albers_Equal_Area_Conic

South America

 

102015 South_America_Lambert_Conformal_Conic

Argentina

West of 70°30' W

22191 Argentina_Zone_1

Argentina

70°30' W to 67°30' W

22192 Argentina_Zone_2

Argentina

67°30' W to 64°30' W

22193 Argentina_Zone_3

Argentina

64°30' W to 61°30' W

22194 Argentina_Zone_4

Argentina

61°30' W to 58°30' W

22195 Argentina_Zone_5

Argentina

58°30' W to 55°30' W

22196 Argentina_Zone_6

Argentina

East of 55°30' W

22197 Argentina_Zone_7

Argentina

Neuquen 70.5° to 67.5° W

2081 Chos_Malal_1914_Argentina_2

Argentina

Tierra del Fuego onshore W of 67.5° W

2083 Hito_XVIII_1963_Argentina_2

Argentina

Tierra del Fuego

2084 Hito_XVIII_1963_UTM_Zone_19S

Argentina

Comodoro Rivadavia W of 67.5° W

2082 Pampa_del_Castillo_Argentina_2

Argentina

60° W to 54° W

31981 SIRGAS_UTM_Zone_21S

Argentina

66° W to 60° W

31980 SIRGAS_UTM_Zone_20S

Argentina

72° W to 66° W

31979 SIRGAS_UTM_Zone_19S

Argentina

78° W to 72° W

31978 SIRGAS_UTM_Zone_18S

Bolivia

72° W to 66° W

24879 PSAD_1956_UTM_Zone_19S

Bolivia

66° W to 60° W

24880 PSAD_1956_UTM_Zone_20S

Bolivia

60° W to 54° W

31981 SIRGAS_UTM_Zone_21S

Bolivia

66° W to 60° W

31980 SIRGAS_UTM_Zone_20S

Bolivia

72° W to 66° W

31979 SIRGAS_UTM_Zone_19S

Brazil

Coastal areas S of 2°55' S and W of 48° W

20822 Aratu_UTM_Zone_22S

Brazil

Coastal areas S of 2°55' S and 48° W to 42° W

20823 Aratu_UTM_Zone_23S

Brazil

Coastal areas S of 2°55' S and E of 42° W

20824 Aratu_UTM_Zone_24S

Brazil

NE coastal area 45° W to 42° W

22523 Corrego_Alegre_UTM_Zone_23S

Brazil

NE coastal area 42° W to 40° W

22524 Corrego_Alegre_UTM_Zone_24S

Brazil

54° W to 48° W

29100 SAD_1969_Brazil_Polyconic

Brazil

54° W to 48° W

31922 SIRGAS_UTM_Zone_22N

Brazil

54° W to 48° W

31982 SIRGAS_UTM_Zone_22S

Brazil

54° W to 48° W

31983 SIRGAS_UTM_Zone_23S

Brazil

54° W to 48° W

31984 SIRGAS_UTM_Zone_24S

Brazil

60° W to 54° W

31985 SIRGAS_UTM_Zone_25S

Brazil

60° W to 54° W

31921 SIRGAS_UTM_Zone_21N

Brazil

66° W to 60° W

31981 SIRGAS_UTM_Zone_21S

Brazil

66° W to 60° W

31920 SIRGAS_UTM_Zone_20N

Brazil

72° W to 66° W

31980 SIRGAS_UTM_Zone_20S

Brazil

72° W to 66° W

31919 SIRGAS_UTM_Zone_19N

Brazil

78° W to 72° W

31979 SIRGAS_UTM_Zone_19S

Brazil

84° W to 78° W

31978 SIRGAS_UTM_Zone_18S

Chile

78° W to 72° W

24877 PSAD_1956_UTM_Zone_17S

Chile

72° W to 66° W

24878 PSAD_1956_UTM_Zone_18S

Chile

72° W to 66° W

24879 PSAD_1956_UTM_Zone_19S

Chile

78° W to 72° W

31979 SIRGAS_UTM_Zone_19S

Chile

Offshore west of 78° W

31978 SIRGAS_UTM_Zone_18S

Colombia

Offshore east of 78° W

21817 Bogota_UTM_Zone_17N

Colombia

West of 1°30' W of Bogota (75°34'51.3" W)

21818 Bogota_UTM_Zone_18N

Colombia

1°30' W to 1°30' E of Bogota (75°34'51.3" to 72°34'51.3" W)

21891 Colombia_West_Zone

Colombia

1°30' E to 4°30' E of Bogota (72°34'51.3" to 69°34'51.3" W)

21892 Colombia_Bogota_Zone

Colombia

East of 4°30' E of Bogota (69°34'51.3" W)

21893 Colombia_East_Central_Zone

Colombia

72° W to 66° W

21894 Colombia_East_Zone

Colombia

72° W to 66° W

31919 SIRGAS_UTM_Zone_19N

Colombia

78° W to 72° W

31979 SIRGAS_UTM_Zone_19S

Colombia

78° W to 72° W

31918 SIRGAS_UTM_Zone_18N

Colombia

84° W to 78° W

31978 SIRGAS_UTM_Zone_18S

Colombia

84° W to 78° W

31917 SIRGAS_UTM_Zone_17N

Colombia

84° W to 78° W

31977 SIRGAS_UTM_Zone_17S

Ecuador

84° W to 78° W

24877 PSAD_1956_UTM_Zone_17S

Ecuador

78° W to 72° W

24818 PSAD_1956_UTM_Zone_18N

Ecuador

78° W to 72° W

24878 PSAD_1956_UTM_Zone_18S

Ecuador

78° W to 72° W

31918 SIRGAS_UTM_Zone_18N

Ecuador

78° W to 72° W

31978 SIRGAS_UTM_Zone_18S

Ecuador

84° W to 78° W

31977 SIRGAS_UTM_Zone_17S

Ecuador

North of equator - 84° W to 78° W

31917 SIRGAS_UTM_Zone_17N

Falkland Islands

West of 60° W

29220 Sapper_Hill_1943_UTM_Zone_20S

Falkland Islands

East of 60° W

29221 Sapper_Hill_1943_UTM_Zone_21S

Falklands

60° W to 54° W

31981 SIRGAS_UTM_Zone_21S

Falklands

66° W to 60° W

31980 SIRGAS_UTM_Zone_20S

French Guiana

54° W to 48° W

31922 SIRGAS_UTM_Zone_22N

French Guiana

60° W to 54° W

31921 SIRGAS_UTM_Zone_21N

Guyana

66° W to 60° W

24820 PSAD_1956_UTM_Zone_20N

Guyana

60° W to 54° W

24821 PSAD_1956_UTM_Zone_21N

Guyana

60° W to 54° W

31921 SIRGAS_UTM_Zone_21N

Guyana

66° W to 60° W

31920 SIRGAS_UTM_Zone_20N

Netherlands Antilles

72° W to 66° W

24819 PSAD_1956_UTM_Zone_19N

Paraguay

60° W to 54° W

31981 SIRGAS_UTM_Zone_21S

Paraguay

66° W to 60° W

31980 SIRGAS_UTM_Zone_20S

Peru

84° W to 78° W

24877 PSAD_1956_UTM_Zone_17S

Peru

78° W to 72° W

24878 PSAD_1956_UTM_Zone_18S

Peru

72° W to 66° W

24879 PSAD_1956_UTM_Zone_19S

Peru

West of 79° W

24891 Peru_West_Zone

Peru

79° W to 73° W

24892 Peru_Central_Zone

Peru

East of 73° W

24893 Peru_East_Zone

Peru

72° W to 66° W

31979 SIRGAS_UTM_Zone_19S

Peru

78° W to 72° W

31978 SIRGAS_UTM_Zone_18S

Peru

84° W to 78° W

31977 SIRGAS_UTM_Zone_17S

South America

78° W to 72° W

29118 SAD_1969_UTM_Zone_18N

South America

72° W to 66° W

29119 SAD_1969_UTM_Zone_19N

South America

66° W to 60° W

29120 SAD_1969_UTM_Zone_20N

South America

60° W to 54° W

29121 SAD_1969_UTM_Zone_21N

South America

54° W to 48° W

29122 SAD_1969_UTM_Zone_22N

South America

84° W to 78° W

29177 SAD_1969_UTM_Zone_17S

South America

78° W to 72° W

29178 SAD_1969_UTM_Zone_18S

South America

72° W to 66° W

29179 SAD_1969_UTM_Zone_19S

South America

66° W to 60° W

29180 SAD_1969_UTM_Zone_20S

South America

60° W to 54° W

29181 SAD_1969_UTM_Zone_21S

South America

54° W to 48° W

29182 SAD_1969_UTM_Zone_22S

South America

48° W to 42° W

29183 SAD_1969_UTM_Zone_23S

South America

42° W to 36° W

29184 SAD_1969_UTM_Zone_24S

South America

36° W to 30° W

29185 SAD_1969_UTM_Zone_25S

Suriname

60° W to 54° W

24821 PSAD_1956_UTM_Zone_21N

Suriname

 

31170 Zanderij_Suriname_Old_TM

Suriname

 

31171 Zanderij_Suriname_TM

Suriname

Offshore

31154 Zanderij_TM_54_NW

Suriname

60° W to 54° W

31921 SIRGAS_UTM_Zone_21N

Trinidad and Tobago

Tobago

2066 Mount_Dillon_Tobago_Grid

Trinidad and Tobago

Trinidad

2067 Naparima_1955_UTM_Zone_20N

Trinidad and Tobago

Trinidad

27120 Naparima_1972_UTM_Zone_20N

Trinidad and Tobago

Trinidad

30200 Trinidad_1903_Trinidad_Grid

Uruguay

54° W to 48° W

31982 SIRGAS_UTM_Zone_22S

Uruguay

60° W to 54° W

31981 SIRGAS_UTM_Zone_21S

Venezuela

West of 72° W

24718 La_Canoa_UTM_Zone_18N

Venezuela

72 to 66° W

24719 La_Canoa_UTM_Zone_19N

Venezuela

72° W to 66° W

24819 PSAD_1956_UTM_Zone_19N

Venezuela

66° W to 60° W

24820 PSAD_1956_UTM_Zone_20N

Venezuela

66° W to 60° W

24720 La_Canoa_UTM_Zone_20N

Venezuela

East of 60° W

24721 La_Canoa_UTM_Zone_21N

Venezuela

Maracaibo area

2101 Lake_Maracaibo_Grid_M1

Venezuela

Maracaibo area

2102 Lake_Maracaibo_Grid

Venezuela

Maracaibo area

2103 Lake_Maracaibo_Grid_M3

Venezuela

Maracaibo, offshore blocks I, II, III

2104 Lake_Maracaibo_La_Rosa_Grid

Venezuela

78° W to 72° W

24818 PSAD_1956_UTM_Zone_18N

Venezuela

66° W to 60° W

31920 SIRGAS_UTM_Zone_20N

Venezuela

72° W to 66° W

31919 SIRGAS_UTM_Zone_19N

Venezuela

78° W to 72° W

31918 SIRGAS_UTM_Zone_18N

 

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