Gold Coast foot
Engineering survey, topographic mapping.
None
Sierra Leone - Freetown Peninsula.
Data Source: EPSG v11.016 2024-08-31
Datum: Sierra Leone Colony 1924
Coordinate System: cartesian
Projection: Sierra Leone New Colony Grid
Geodetic CRS: Sierra Leone 1924
PROJCRS["Sierra Leone 1924 / New Colony 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["Sierra Leone New Colony 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",500000,
LENGTHUNIT["Gold Coast foot",0.304799710181509],
ID["EPSG",8806]],
PARAMETER["False northing",0,
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["Engineering survey, topographic mapping."],
AREA["Sierra Leone - Freetown Peninsula."],
BBOX[8.32,-13.34,8.55,-13.13]],
ID["EPSG",2159]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "ProjectedCRS",
"name": "Sierra Leone 1924 / New Colony 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": "Sierra Leone New Colony 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": 500000,
"unit": {
"type": "LinearUnit",
"name": "Gold Coast foot",
"conversion_factor": 0.304799710181509
},
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 0,
"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": "Engineering survey, 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": 2159
}
}
{'crs_wkt': 'PROJCRS["Sierra Leone 1924 / New Colony 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["Sierra '
'Leone New Colony 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",500000,LENGTHUNIT["Gold Coast '
'foot",0.304799710181509],ID["EPSG",8806]],PARAMETER["False '
'northing",0,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["Engineering survey, '
'topographic mapping."],AREA["Sierra Leone - Freetown '
'Peninsula."],BBOX[8.32,-13.34,8.55,-13.13]],ID["EPSG",2159]]',
'false_easting': 500000.0,
'false_northing': 0.0,
'geographic_crs_name': 'Sierra Leone 1924',
'grid_mapping_name': 'transverse_mercator',
'horizontal_datum_name': 'Sierra Leone Colony 1924',
'inverse_flattening': 296.0,
'latitude_of_projection_origin': 6.666666666666667,
'longitude_of_central_meridian': -12.0,
'longitude_of_prime_meridian': 0.0,
'prime_meridian_name': 'Greenwich',
'projected_crs_name': 'Sierra Leone 1924 / New Colony Grid',
'reference_ellipsoid_name': 'War Office',
'scale_factor_at_central_meridian': 1.0,
'semi_major_axis': 6378300.0,
'semi_minor_axis': 6356751.689189189}