SAD69 / UTM zone 21N

Brazil , accuracy 5.0 m, code 15485 (default) [3]
Brazil , accuracy 1.0 m, code 5528 [grid]

Selected transformation

Method: NTv2

Grid Files: SAD69_003.gsb

Remarks: For IBGE, in onshore east and south Brazil only, replaces SAD69 to SIRGAS 2000 (1) (tfm code 15485) for pre-1996 data based on the classical geodetic network. May be used as transformation between SAD69 and WGS 84 - see tfm code 5542.

Information source: IBGE.

Revision date: 2023-01-17

Attributes

Unit: metre

Geodetic CRS: SAD69

Datum: South American Datum 1969

Ellipsoid: GRS 1967 Modified

Prime meridian: Greenwich

Data source: EPSG

Revision date: 2011-03-21

Scope: Engineering survey, topographic mapping.

Remarks: Uses GRS 1967 ellipsoid with 1/f to exactly 2 decimal places.

Area of use: South America between 60°W and 54°W, northern hemisphere onshore, but excluding most of the area south of approximately 2°N.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Covered area powered by MapTiler

Center coordinates
1509599.31 -1643320.5

Projected bounds:
101455.6 -3969451.3
3042013.24 529255.39

WGS84 bounds:
-60.58 -33.78
-34.74 4.43

Brazil - onshore southeast of a line beginning at the intersection of the 53°W meridian with the northern national boundary then running southwards to 14°S, then westwards to the national boundary.

Definition: OGC Well Known Text 2 (2019)

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BOUNDCRS[
    SOURCECRS[
        PROJCRS["SAD69 / UTM zone 21N",
            BASEGEOGCRS["SAD69",
                DATUM["South American Datum 1969",
                    ELLIPSOID["GRS 1967 Modified",6378160,298.25,
                        LENGTHUNIT["metre",1]]],
                PRIMEM["Greenwich",0,
                    ANGLEUNIT["degree",0.0174532925199433]],
                ID["EPSG",4618]],
            CONVERSION["UTM zone 21N",
                METHOD["Transverse Mercator",
                    ID["EPSG",9807]],
                PARAMETER["Latitude of natural origin",0,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8801]],
                PARAMETER["Longitude of natural origin",-57,
                    ANGLEUNIT["degree",0.0174532925199433],
                    ID["EPSG",8802]],
                PARAMETER["Scale factor at natural origin",0.9996,
                    SCALEUNIT["unity",1],
                    ID["EPSG",8805]],
                PARAMETER["False easting",500000,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8806]],
                PARAMETER["False northing",0,
                    LENGTHUNIT["metre",1],
                    ID["EPSG",8807]]],
            CS[Cartesian,2],
                AXIS["(E)",east,
                    ORDER[1],
                    LENGTHUNIT["metre",1]],
                AXIS["(N)",north,
                    ORDER[2],
                    LENGTHUNIT["metre",1]],
            USAGE[
                SCOPE["Engineering survey, topographic mapping."],
                AREA["South America between 60°W and 54°W, northern hemisphere onshore, but excluding most of the area south of approximately 2°N."],
                BBOX[1.18,-60,8.6,-54]],
            ID["EPSG",29171]]],
    TARGETCRS[
        GEOGCRS["SIRGAS 2000",
            DATUM["Sistema de Referencia Geocentrico para las AmericaS 2000",
                ELLIPSOID["GRS 1980",6378137,298.257222101,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["Latin America - Central America and South America - onshore and offshore. Brazil - onshore and offshore."],
                BBOX[-59.87,-122.19,32.72,-25.28]],
            ID["EPSG",4674]]],
    ABRIDGEDTRANSFORMATION["SAD69 to SIRGAS 2000 (2)",
        METHOD["NTv2",
            ID["EPSG",9615]],
        PARAMETERFILE["Latitude and longitude difference file","SAD69_003.gsb"],
        USAGE[
            SCOPE["Pre-1996 data related to the classical geodetic network."],
            AREA["Brazil - onshore southeast of a line beginning at the intersection of the 53°W meridian with the northern national boundary then running southwards to 14°S, then westwards to the national boundary."],
            BBOX[-33.78,-60.58,4.43,-34.74]],
        ID["EPSG",5528],
        REMARK["For IBGE, in onshore east and south Brazil only, replaces SAD69 to SIRGAS 2000 (1) (tfm code 15485) for pre-1996 data based on the classical geodetic network. May be used as transformation between SAD69 and WGS 84 - see tfm code 5542."]]]

Definition: PROJ.4

+proj=utm +zone=21 +ellps=aust_SA +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:29171","+proj=utm +zone=21 +ellps=aust_SA +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "ProjectedCRS",
        "name": "SAD69 / UTM zone 21N",
        "base_crs": {
            "name": "SAD69",
            "datum": {
                "type": "GeodeticReferenceFrame",
                "name": "South American Datum 1969",
                "ellipsoid": {
                    "name": "GRS 1967 Modified",
                    "semi_major_axis": 6378160,
                    "inverse_flattening": 298.25
                }
            },
            "coordinate_system": {
                "subtype": "ellipsoidal",
                "axis": [
                    {
                        "name": "Geodetic latitude",
                        "abbreviation": "Lat",
                        "direction": "north",
                        "unit": "degree"
                    },
                    {
                        "name": "Geodetic longitude",
                        "abbreviation": "Lon",
                        "direction": "east",
                        "unit": "degree"
                    }
                ]
            },
            "id": {
                "authority": "EPSG",
                "code": 4618
            }
        },
        "conversion": {
            "name": "UTM zone 21N",
            "method": {
                "name": "Transverse Mercator",
                "id": {
                    "authority": "EPSG",
                    "code": 9807
                }
            },
            "parameters": [
                {
                    "name": "Latitude of natural origin",
                    "value": 0,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8801
                    }
                },
                {
                    "name": "Longitude of natural origin",
                    "value": -57,
                    "unit": "degree",
                    "id": {
                        "authority": "EPSG",
                        "code": 8802
                    }
                },
                {
                    "name": "Scale factor at natural origin",
                    "value": 0.9996,
                    "unit": "unity",
                    "id": {
                        "authority": "EPSG",
                        "code": 8805
                    }
                },
                {
                    "name": "False easting",
                    "value": 500000,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8806
                    }
                },
                {
                    "name": "False northing",
                    "value": 0,
                    "unit": "metre",
                    "id": {
                        "authority": "EPSG",
                        "code": 8807
                    }
                }
            ]
        },
        "coordinate_system": {
            "subtype": "Cartesian",
            "axis": [
                {
                    "name": "Easting",
                    "abbreviation": "E",
                    "direction": "east",
                    "unit": "metre"
                },
                {
                    "name": "Northing",
                    "abbreviation": "N",
                    "direction": "north",
                    "unit": "metre"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 29171
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "SIRGAS 2000",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Sistema de Referencia Geocentrico para las AmericaS 2000",
            "ellipsoid": {
                "name": "GRS 1980",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257222101
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4674
        }
    },
    "transformation": {
        "name": "SAD69 to SIRGAS 2000 (2)",
        "method": {
            "name": "NTv2",
            "id": {
                "authority": "EPSG",
                "code": 9615
            }
        },
        "parameters": [
            {
                "name": "Latitude and longitude difference file",
                "value": "SAD69_003.gsb",
                "id": {
                    "authority": "EPSG",
                    "code": 8656
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 5528
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=utm"
	"zone=21"
	"ellps=aust_SA"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=utm +zone=21 +ellps=aust_SA +units=m +no_defs +type=crs">
	<Layer srs="+proj=utm +zone=21 +ellps=aust_SA +units=m +no_defs +type=crs">
	</Layer>
</Map>

EPSG:29171