Geodetic CRS: RGWF96
Datum: Reseau Geodesique de Wallis et Futuna 1996
Ellipsoid: GRS 1980
Prime meridian: Greenwich
Data source: EPSG
Information source: "Calcul des grilles de conversion altimétrique pour Wallis-et-Futuna faisant suite à la mission IGN de 2022", Institut National de l'Information Géographique et Forestière (IGN), http://www.ign.fr
Revision date: 2026-03-18
Scope: Derivation of gravity-related heights from GNSS observations.
Remarks: For reversible alternative to this transformation see RGWF96 to RGWF96 + NGFA 2022 height (1) (code 11449).
Method: Geographic3D to GravityRelatedHeight (IGN2009)
Area of use: Wallis and Futuna - Futuna and Alofi - onshore.
Description: (0,)
Definition: OGC Well Known Text 2 (2019)
COORDINATEOPERATION["RGWF96 to NGFA 2022 height (1)", VERSION["IGN-Wlf Futuna 2022"], SOURCECRS[ GEOGCRS["RGWF96", DATUM["Reseau Geodesique de Wallis et Futuna 1996", ELLIPSOID["GRS 1980",6378137,298.257222101, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], CS[ellipsoidal,3], AXIS["geodetic latitude (Lat)",north, ORDER[1], ANGLEUNIT["degree",0.0174532925199433]], AXIS["geodetic longitude (Lon)",east, ORDER[2], ANGLEUNIT["degree",0.0174532925199433]], AXIS["ellipsoidal height (h)",up, ORDER[3], LENGTHUNIT["metre",1]], ID["EPSG",8899]]], TARGETCRS[ VERTCRS["NGFA 2022 height", VDATUM["Nivellement General de Futuna et d’Alofi 2022"], CS[vertical,1], AXIS["gravity-related height (H)",up, LENGTHUNIT["metre",1]], ID["EPSG",11446]]], METHOD["Geographic3D to GravityRelatedHeight (IGN2009)", ID["EPSG",1073]], PARAMETERFILE["Geoid (height correction) model file","ggfutuna2022v2.tac"], OPERATIONACCURACY[0.05], USAGE[ SCOPE["Derivation of gravity-related heights from GNSS observations."], AREA["Wallis and Futuna - Futuna and Alofi - onshore."], BBOX[-14.42,-178.24,-14.18,-177.94]], ID["EPSG",11448], REMARK["For reversible alternative to this transformation see RGWF96 to RGWF96 + NGFA 2022 height (1) (code 11449)."]]
Definition: JavaScript (Proj4js)
proj4.defs("EPSG:11448","+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ggfutuna2022v2.tac +multiplier=1 +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": "RGWF96 to NGFA 2022 height (1)", "source_crs": { "type": "GeographicCRS", "name": "RGWF96", "datum": { "type": "GeodeticReferenceFrame", "name": "Reseau Geodesique de Wallis et Futuna 1996", "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" }, { "name": "Ellipsoidal height", "abbreviation": "h", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 8899 }, "remarks": "See CRS code 8901 for alternate system with horizontal axes reversed used by IGN for GIS purposes." }, "target_crs": { "type": "VerticalCRS", "name": "NGFA 2022 height", "datum": { "type": "VerticalReferenceFrame", "name": "Nivellement General de Futuna et d’Alofi 2022" }, "coordinate_system": { "subtype": "vertical", "axis": [ { "name": "Gravity-related height", "abbreviation": "H", "direction": "up", "unit": "metre" } ] }, "id": { "authority": "EPSG", "code": 11446 } }, "method": { "name": "Geographic3D to GravityRelatedHeight (IGN2009)", "id": { "authority": "EPSG", "code": 1073 } }, "parameters": [ { "name": "Geoid (height correction) model file", "value": "ggfutuna2022v2.tac", "id": { "authority": "EPSG", "code": 8666 } } ], "accuracy": "0.05", "scope": "Derivation of gravity-related heights from GNSS observations.", "area": "Wallis and Futuna - Futuna and Alofi - onshore.", "bbox": { "south_latitude": -14.42, "west_longitude": -178.24, "north_latitude": -14.18, "east_longitude": -177.94 }, "id": { "authority": "EPSG", "code": 11448 }, "remarks": "For reversible alternative to this transformation see RGWF96 to RGWF96 + NGFA 2022 height (1) (code 11449)." }
Definition: MapServer - MAPfile
PROJECTION "proj=pipeline" "step" "proj=axisswap" "order=2,1" "step" "proj=unitconvert" "xy_in=deg" "xy_out=rad" "step" "inv" "proj=vgridshift" "grids=ggfutuna2022v2.tac" "multiplier=1" "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 +inv +proj=vgridshift +grids=ggfutuna2022v2.tac +multiplier=1 +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 +inv +proj=vgridshift +grids=ggfutuna2022v2.tac +multiplier=1 +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 ( 11448, 'EPSG', 11448, '+proj=pipeline +step +proj=axisswap +order=2,1 +step +proj=unitconvert +xy_in=deg +xy_out=rad +step +inv +proj=vgridshift +grids=ggfutuna2022v2.tac +multiplier=1 +step +proj=unitconvert +xy_in=rad +xy_out=deg +step +proj=axisswap +order=2,1', 'None');