EPSG:11433

Tahiti 79 to RGPF (2)

Attributes

Geodetic CRS: Tahiti 79

Datum: Tahiti 79

Ellipsoid: International 1924

Prime meridian: Greenwich

Data source: EPSG

Information source: Technical Report "Assistance, conseil et contrôle pour la mise en référence RGPF du cadastre de Tahiti", IGN FI on behalf of Gouvernement de la Polynésie Française, Land Affairs Department (DAF), 18th December 2025.

Revision date: 2026-05-19

Scope: Cadastre, topographic mapping (large scale).

Remarks: Accuracy better than 7cm in coastal urban areas including Papette, and 35cm in interior areas.

Method: NTv2

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

Description: (0,)

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French Polynesia - Society Islands - Tahiti.

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Definition: OGC Well Known Text 2 (2019)

COORDINATEOPERATION["Tahiti 79 to RGPF (2)",
    VERSION["DAF-Pyf 2025"],
    SOURCECRS[
        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]],
            ID["EPSG",4690]]],
    TARGETCRS[
        GEOGCRS["RGPF",
            DATUM["Reseau Geodesique de la Polynesie Francaise",
                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]],
            ID["EPSG",4687]]],
    METHOD["NTv2",
        ID["EPSG",9615]],
    PARAMETERFILE["Latitude and longitude difference file","gr3dpf25.gsb"],
    OPERATIONACCURACY[0.1],
    USAGE[
        SCOPE["Cadastre, topographic mapping (large scale)."],
        AREA["French Polynesia - Society Islands - Tahiti."],
        BBOX[-17.93,-149.7,-17.44,-149.09]],
    ID["EPSG",11433],
    REMARK["Accuracy better than 7cm in coastal urban areas including Papette, and 35cm in interior areas."]]

Definition: PROJ.4

+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=gr3dpf25.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:11433","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=gr3dpf25.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Transformation",
    "name": "Tahiti 79 to RGPF (2)",
    "source_crs": {
        "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"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4690
        },
        "remarks": "Replaces Tahiti 52 (CRS code 4628) in Tahiti. Replaced by RGPF (CRS code 4687)."
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "RGPF",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Reseau Geodesique de la Polynesie Francaise",
            "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": 4687
        },
        "remarks": "Replaces Tahaa 54 (CRS code 4629), IGN 63 Hiva Oa (4689), IGN 72 Nuku Hiva (4630), Maupiti 83 (4692), MHEFO 55 (4688), Moorea 87 (4691) and Tahiti 79 (4690)."
    },
    "method": {
        "name": "NTv2",
        "id": {
            "authority": "EPSG",
            "code": 9615
        }
    },
    "parameters": [
        {
            "name": "Latitude and longitude difference file",
            "value": "gr3dpf25.gsb",
            "id": {
                "authority": "EPSG",
                "code": 8656
            }
        }
    ],
    "accuracy": "0.1",
    "scope": "Cadastre, topographic mapping (large scale).",
    "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": 11433
    },
    "remarks": "Accuracy better than 7cm in coastal urban areas including Papette, and 35cm in interior areas."
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=pipeline"
	"step"
	"proj=axisswap"
	"order=2,1"
	"step"
	"proj=unitconvert"
	"xy_in=deg"
	"xy_out=rad"
	"step"
	"proj=hgridshift"
	"grids=gr3dpf25.gsb"
	"step"
	"proj=unitconvert"
	"xy_in=rad"
	"xy_out=deg"
	"step"
	"proj=axisswap"
	"order=2,1"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=gr3dpf25.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	<Layer srs="+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=gr3dpf25.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11433, 'EPSG', 11433, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +proj=hgridshift +grids=gr3dpf25.gsb +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');