Geocentric translations (geog2D domain)
Derived at 3 common points.
Ordnance Survey International
2020-03-14
degree (supplier to define representation)
EPSG
Ordnance Survey International
2023-11-19
Geodesy.
Ellipsoid semi-major axis (a)=20926201 exactly Gold Coast feet. Replaced by Leigon (code 4250) in 1978.
Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree
Definition: OGC Well Known Text
GEOGCS["Accra", DATUM["Accra", SPHEROID["War Office",6378300,296], TOWGS84[-199,32,322,0,0,0,0]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4168"]]
Definition: OGC Well Known Text 2 (2019)
GEOGCRS["Accra", DATUM["Accra", ELLIPSOID["War Office",6378300,296, 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["Ghana - onshore and offshore."], BBOX[1.4,-3.79,11.16,2.1]], ID["EPSG",4168]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "GeographicCRS", "name": "Accra", "datum": { "type": "GeodeticReferenceFrame", "name": "Accra", "ellipsoid": { "name": "War Office", "semi_major_axis": 6378300, "inverse_flattening": 296 } }, "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": "Ghana - onshore and offshore.", "bbox": { "south_latitude": 1.4, "west_longitude": -3.79, "north_latitude": 11.16, "east_longitude": 2.1 }, "id": { "authority": "EPSG", "code": 4168 } }
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=longlat +a=6378300 +rf=296 +towgs84=-199,32,322,0,0,0,0 +no_defs +type=crs"> <Layer srs="+proj=longlat +a=6378300 +rf=296 +towgs84=-199,32,322,0,0,0,0 +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4168, 'EPSG', 4168, '+proj=longlat +a=6378300 +rf=296 +towgs84=-199,32,322,0,0,0,0 +no_defs +type=crs', 'GEOGCS["Accra",DATUM["Accra",SPHEROID["War Office",6378300,296],TOWGS84[-199,32,322,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4168"]]');