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Unit: Gold Coast foot
Geodetic CRS: Sierra Leone 1924
Datum: Sierra Leone Colony 1924
Ellipsoid: War Office
Prime meridian: Greenwich
Data source: EPSG
Information source: Ordnance Survey International
Revision date: 2001-06-05
Scope: Topographic mapping.
Remarks: Replaces the Sierra Leone War Office Grid. New grid is 422.3 ft west and 112.1 ft south of old grid. Ellipsoid semi-major axis (a)=20926201 Gold Coast feet; 1 Gold Coast foot = 0.3047997101815 m.
Area of use: Sierra Leone - Freetown Peninsula.
Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: ftGC.
&stroke=red&width=2&path=8.32,-13.34|8.55,-13.34|8.55,-13.13|8.32,-13.13|8.32,-13.34)
Center coordinates
353753.07 1242312.01
Projected bounds:
315664.39 1200462.07
391819.62 1284175.57
WGS84 bounds:
-13.34 8.32
-13.13 8.55
Definition: OGC Well Known Text
PROJCS["Sierra Leone 1924 / New War Office Grid", GEOGCS["Sierra Leone 1924", DATUM["Sierra_Leone_Colony_1924", SPHEROID["War Office",6378300,296, AUTHORITY["EPSG","7029"]], AUTHORITY["EPSG","6174"]], PRIMEM["Greenwich",0, AUTHORITY["EPSG","8901"]], UNIT["degree",0.0174532925199433, AUTHORITY["EPSG","9122"]], AUTHORITY["EPSG","4174"]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",6.66666666666667], PARAMETER["central_meridian",-12], PARAMETER["scale_factor",1], PARAMETER["false_easting",800000], PARAMETER["false_northing",600000], UNIT["Gold Coast foot",0.304799710181509, AUTHORITY["EPSG","9094"]], AXIS["Easting",EAST], AXIS["Northing",NORTH], AUTHORITY["EPSG","2160"]]
Definition: OGC Well Known Text 2 (2019)
PROJCRS["Sierra Leone 1924 / New War Office Grid", BASEGEOGCRS["Sierra Leone 1924", DATUM["Sierra Leone Colony 1924", ELLIPSOID["War Office",6378300,296, LENGTHUNIT["metre",1]]], PRIMEM["Greenwich",0, ANGLEUNIT["degree",0.0174532925199433]], ID["EPSG",4174]], CONVERSION["New War Office Sierra Leone Grid", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",6.66666666666667, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-12, ANGLEUNIT["degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",1, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",800000, LENGTHUNIT["Gold Coast foot",0.304799710181509], ID["EPSG",8806]], PARAMETER["False northing",600000, LENGTHUNIT["Gold Coast foot",0.304799710181509], ID["EPSG",8807]]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["Gold Coast foot",0.304799710181509]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["Gold Coast foot",0.304799710181509]], USAGE[ SCOPE["Topographic mapping."], AREA["Sierra Leone - Freetown Peninsula."], BBOX[8.32,-13.34,8.55,-13.13]], ID["EPSG",2160]]
Definition: ESRI Well Known Text
PROJCS["Sierra_Leone_1924_New_War_Office_Grid", GEOGCS["GCS_Sierra_Leone_1924", DATUM["D_Sierra_Leone_1924", SPHEROID["War_Office",6378300.0,296.0]], PRIMEM["Greenwich",0.0], UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",800000.0], PARAMETER["False_Northing",600000.0], PARAMETER["Central_Meridian",-12.0], PARAMETER["Scale_Factor",1.0], PARAMETER["Latitude_Of_Origin",6.66666666666667], UNIT["Gold Coast foot",0.304799710181509]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json", "type": "ProjectedCRS", "name": "Sierra Leone 1924 / New War Office Grid", "base_crs": { "name": "Sierra Leone 1924", "datum": { "type": "GeodeticReferenceFrame", "name": "Sierra Leone Colony 1924", "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" } ] }, "id": { "authority": "EPSG", "code": 4174 } }, "conversion": { "name": "New War Office Sierra Leone Grid", "method": { "name": "Transverse Mercator", "id": { "authority": "EPSG", "code": 9807 } }, "parameters": [ { "name": "Latitude of natural origin", "value": 6.66666666666667, "unit": "degree", "id": { "authority": "EPSG", "code": 8801 } }, { "name": "Longitude of natural origin", "value": -12, "unit": "degree", "id": { "authority": "EPSG", "code": 8802 } }, { "name": "Scale factor at natural origin", "value": 1, "unit": "unity", "id": { "authority": "EPSG", "code": 8805 } }, { "name": "False easting", "value": 800000, "unit": { "type": "LinearUnit", "name": "Gold Coast foot", "conversion_factor": 0.304799710181509 }, "id": { "authority": "EPSG", "code": 8806 } }, { "name": "False northing", "value": 600000, "unit": { "type": "LinearUnit", "name": "Gold Coast foot", "conversion_factor": 0.304799710181509 }, "id": { "authority": "EPSG", "code": 8807 } } ] }, "coordinate_system": { "subtype": "Cartesian", "axis": [ { "name": "Easting", "abbreviation": "E", "direction": "east", "unit": { "type": "LinearUnit", "name": "Gold Coast foot", "conversion_factor": 0.304799710181509 } }, { "name": "Northing", "abbreviation": "N", "direction": "north", "unit": { "type": "LinearUnit", "name": "Gold Coast foot", "conversion_factor": 0.304799710181509 } } ] }, "scope": "Topographic mapping.", "area": "Sierra Leone - Freetown Peninsula.", "bbox": { "south_latitude": 8.32, "west_longitude": -13.34, "north_latitude": 8.55, "east_longitude": -13.13 }, "id": { "authority": "EPSG", "code": 2160 } }
Definition: GeoServer
2160=PROJCS["Sierra Leone 1924 / New War Office Grid",GEOGCS["Sierra Leone 1924",DATUM["Sierra_Leone_Colony_1924",SPHEROID["War Office",6378300,296,AUTHORITY["EPSG","7029"]],AUTHORITY["EPSG","6174"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4174"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",6.66666666666667],PARAMETER["central_meridian",-12],PARAMETER["scale_factor",1],PARAMETER["false_easting",800000],PARAMETER["false_northing",600000],UNIT["Gold Coast foot",0.304799710181509,AUTHORITY["EPSG","9094"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2160"]]
Definition: Mapnik
<?xml version="1.0" encoding="utf-8"?> <Map srs="+proj=tmerc +lat_0=6.66666666666667 +lon_0=-12 +k=1 +x_0=243839.768145207 +y_0=182879.826108905 +a=6378300 +rf=296 +to_meter=0.304799710181509 +no_defs +type=crs"> <Layer srs="+proj=tmerc +lat_0=6.66666666666667 +lon_0=-12 +k=1 +x_0=243839.768145207 +y_0=182879.826108905 +a=6378300 +rf=296 +to_meter=0.304799710181509 +no_defs +type=crs"> </Layer> </Map>
Definition: SQL (PostGIS)
INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 2160, 'EPSG', 2160, '+proj=tmerc +lat_0=6.66666666666667 +lon_0=-12 +k=1 +x_0=243839.768145207 +y_0=182879.826108905 +a=6378300 +rf=296 +to_meter=0.304799710181509 +no_defs +type=crs', 'PROJCS["Sierra Leone 1924 / New War Office Grid",GEOGCS["Sierra Leone 1924",DATUM["Sierra_Leone_Colony_1924",SPHEROID["War Office",6378300,296,AUTHORITY["EPSG","7029"]],AUTHORITY["EPSG","6174"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4174"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",6.66666666666667],PARAMETER["central_meridian",-12],PARAMETER["scale_factor",1],PARAMETER["false_easting",800000],PARAMETER["false_northing",600000],UNIT["Gold Coast foot",0.304799710181509,AUTHORITY["EPSG","9094"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","2160"]]');
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