EPSG:4690

Tahiti 79

Transform Get position on a map

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Method: Position Vector transformation (geog2D domain)

Remarks: Concatenation of Tahiti 79 to RGPF (1) and RGPF to WGS 84 (1) (CT codes 8829 and 8828).

Information source: Gouvernement de la Polynésie Française, Service de l'Urbanisme, Section topographie.

Revision date: 2020-03-14

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Tahiti 79

Datum: Tahiti 79

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Gouvernement de la Polynésie Française, Service de l'Urbanisme, Section topographie.

Revision date: 2005-08-12

Scope: Hydrography, topographic mapping.

Remarks: Replaces Tahiti 52 (CRS code 4628) in Tahiti. Replaced by RGPF (CRS code 4687).

Area of use: French Polynesia - Society Islands - Tahiti.

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

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Center coordinates
-149.39 -17.69

WGS84 bounds:
-149.7 -17.93
-149.09 -17.44

French Polynesia - Society Islands - Tahiti.
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Definition: OGC Well Known Text

GEOGCS["Tahiti 79",
    DATUM["Tahiti_79",
        SPHEROID["International 1924",6378388,297],
        TOWGS84[221.597,152.441,176.523,2.403,1.3893,0.884,11.4648]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4690"]]

Definition: OGC Well Known Text 2 (2019)

GEOGCRS["Tahiti 79",
    DATUM["Tahiti 79",
        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["Hydrography, topographic mapping."],
        AREA["French Polynesia - Society Islands - Tahiti."],
        BBOX[-17.93,-149.7,-17.44,-149.09]],
    ID["EPSG",4690]]

Definition: ESRI Well Known Text

GEOGCS["GCS_Tahiti_1979",
    DATUM["D_Tahiti_1979",
        SPHEROID["International_1924",6378388.0,297.0]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=intl +towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4690","+proj=longlat +ellps=intl +towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "Tahiti 79",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Tahiti 79",
        "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": "Hydrography, topographic mapping.",
    "area": "French Polynesia - Society Islands - Tahiti.",
    "bbox": {
        "south_latitude": -17.93,
        "west_longitude": -149.7,
        "north_latitude": -17.44,
        "east_longitude": -149.09
    },
    "id": {
        "authority": "EPSG",
        "code": 4690
    }
}

Definition: GeoServer

4690=GEOGCS["Tahiti 79",DATUM["Tahiti_79",SPHEROID["International 1924",6378388,297],TOWGS84[221.597,152.441,176.523,2.403,1.3893,0.884,11.4648]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4690"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=intl"
	"towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=intl +towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=intl +towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4690, 'EPSG', 4690, '+proj=longlat +ellps=intl +towgs84=221.597,152.441,176.523,2.403,1.3893,0.884,11.4648 +no_defs +type=crs', 'GEOGCS["Tahiti 79",DATUM["Tahiti_79",SPHEROID["International 1924",6378388,297],TOWGS84[221.597,152.441,176.523,2.403,1.3893,0.884,11.4648]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4690"]]');