EPSG:4271

Naparima 1972

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Available transformations
to EPSG:4326
No other targets exist for this CRS

Selected transformation

Method: Geocentric translations (geog2D domain)

Remarks: DMA does not differentiate between Naparima 1955 (Trinidad) and Naparima 1972 (Tobago). Consequently for Trinidad IOGP has duplicated this transformation as Naparima 1955 to WGS 84 (3) - see code 1556.

Information source: U.S. Defense Mapping Agency TR8350.2 September 1987.

Revision date: 2020-03-14

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Naparima 1972

Datum: Naparima 1972

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Ordnance Survey International.

Revision date: 2017-06-13

Scope: Geodesy.

Remarks: Naparima 1972 is an extension to Tobago of the Naparima 1955 network of Trinidad.

Area of use: Trinidad and Tobago - Tobago - onshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
-60.67 11.24

WGS84 bounds:
-60.9 11.08
-60.44 11.41

Trinidad and Tobago - Tobago - onshore.
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Definition: Well Known Text (WKT)

GEOGCS["Naparima 1972",
    DATUM["Naparima_1972",
        SPHEROID["International 1924",6378388,297],
        TOWGS84[-2,374,172,0,0,0,0]],
    PRIMEM["Greenwich",0],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4271"]]

Definition: ESRI WKT

GEOGCS["GCS_Naparima_1972",DATUM["D_Naparima_1972",SPHEROID["International_1924",6378388.0,297.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=intl +towgs84=-2,374,172,0,0,0,0 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4271","+proj=longlat +ellps=intl +towgs84=-2,374,172,0,0,0,0 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "Naparima 1972",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Naparima 1972",
        "ellipsoid": {
            "name": "International 1924",
            "semi_major_axis": 6378388,
            "inverse_flattening": 297
        }
    },
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
            {
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
            },
            {
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
            }
        ]
    },
    "scope": "Geodesy.",
    "area": "Trinidad and Tobago - Tobago - onshore.",
    "bbox": {
        "south_latitude": 11.08,
        "west_longitude": -60.9,
        "north_latitude": 11.41,
        "east_longitude": -60.44
    },
    "id": {
        "authority": "EPSG",
        "code": 4271
    }
}

Definition: GeoServer

4271=GEOGCS["Naparima 1972",DATUM["Naparima_1972",SPHEROID["International 1924",6378388,297],TOWGS84[-2,374,172,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4271"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=intl"
	"towgs84=-2,374,172,0,0,0,0"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=intl +towgs84=-2,374,172,0,0,0,0 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=intl +towgs84=-2,374,172,0,0,0,0 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4271, 'EPSG', 4271, '+proj=longlat +ellps=intl +towgs84=-2,374,172,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Naparima 1972",DATUM["Naparima_1972",SPHEROID["International 1924",6378388,297],TOWGS84[-2,374,172,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4271"]]');

Definition: OGC WKT

GEOGCS["Naparima 1972",DATUM["Naparima_1972",SPHEROID["International 1924",6378388,297],TOWGS84[-2,374,172,0,0,0,0]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4271"]]

Definition: OGC WKT 2 (2019)

GEOGCRS["Naparima 1972",DATUM["Naparima 1972",ELLIPSOID["International 1924",6378388,297,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["Geodesy."],AREA["Trinidad and Tobago - Tobago - onshore."],BBOX[11.08,-60.9,11.41,-60.44]],ID["EPSG",4271]]