Clarke's foot
Cadastre, engineering survey, topographic mapping (large and medium scale).
None
Jamaica - onshore.
Data Source: EPSG v11.016 2024-08-31
Datum: Jamaica 1875
Coordinate System: cartesian
Projection: Jamaica (Old Grid)
Geodetic CRS: Jamaica 1875
PROJCRS["Jamaica 1875 / Jamaica (Old Grid)",
BASEGEOGCRS["Jamaica 1875",
DATUM["Jamaica 1875",
ELLIPSOID["Clarke 1880",20926202,293.466307655636,
LENGTHUNIT["Clarke's foot",0.3047972654]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4241]],
CONVERSION["Jamaica (Old Grid)",
METHOD["Lambert Conic Conformal (1SP)",
ID["EPSG",9801]],
PARAMETER["Latitude of natural origin",18,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8801]],
PARAMETER["Longitude of natural origin",-77,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8802]],
PARAMETER["Scale factor at natural origin",1,
SCALEUNIT["unity",1],
ID["EPSG",8805]],
PARAMETER["False easting",550000,
LENGTHUNIT["Clarke's foot",0.3047972654],
ID["EPSG",8806]],
PARAMETER["False northing",400000,
LENGTHUNIT["Clarke's foot",0.3047972654],
ID["EPSG",8807]]],
CS[Cartesian,2],
AXIS["(E)",east,
ORDER[1],
LENGTHUNIT["Clarke's foot",0.3047972654]],
AXIS["(N)",north,
ORDER[2],
LENGTHUNIT["Clarke's foot",0.3047972654]],
USAGE[
SCOPE["Cadastre, engineering survey, topographic mapping (large and medium scale)."],
AREA["Jamaica - onshore."],
BBOX[17.64,-78.43,18.58,-76.17]],
ID["EPSG",24100]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "ProjectedCRS",
"name": "Jamaica 1875 / Jamaica (Old Grid)",
"base_crs": {
"name": "Jamaica 1875",
"datum": {
"type": "GeodeticReferenceFrame",
"name": "Jamaica 1875",
"ellipsoid": {
"name": "Clarke 1880",
"semi_major_axis": {
"value": 20926202,
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
}
},
"semi_minor_axis": {
"value": 20854895,
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
}
}
}
},
"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": 4241
}
},
"conversion": {
"name": "Jamaica (Old Grid)",
"method": {
"name": "Lambert Conic Conformal (1SP)",
"id": {
"authority": "EPSG",
"code": 9801
}
},
"parameters": [
{
"name": "Latitude of natural origin",
"value": 18,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8801
}
},
{
"name": "Longitude of natural origin",
"value": -77,
"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": 550000,
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
},
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 400000,
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
},
"id": {
"authority": "EPSG",
"code": 8807
}
}
]
},
"coordinate_system": {
"subtype": "Cartesian",
"axis": [
{
"name": "Easting",
"abbreviation": "E",
"direction": "east",
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
}
},
{
"name": "Northing",
"abbreviation": "N",
"direction": "north",
"unit": {
"type": "LinearUnit",
"name": "Clarke's foot",
"conversion_factor": 0.3047972654
}
}
]
},
"scope": "Cadastre, engineering survey, topographic mapping (large and medium scale).",
"area": "Jamaica - onshore.",
"bbox": {
"south_latitude": 17.64,
"west_longitude": -78.43,
"north_latitude": 18.58,
"east_longitude": -76.17
},
"id": {
"authority": "EPSG",
"code": 24100
}
}
{'crs_wkt': 'PROJCRS["Jamaica 1875 / Jamaica (Old Grid)",BASEGEOGCRS["Jamaica '
'1875",DATUM["Jamaica 1875",ELLIPSOID["Clarke '
'1880",20926202,293.466307655636,LENGTHUNIT["Clarke\'s '
'foot",0.3047972654]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4241]],CONVERSION["Jamaica '
'(Old Grid)",METHOD["Lambert Conic Conformal '
'(1SP)",ID["EPSG",9801]],PARAMETER["Latitude of natural '
'origin",18,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
'of natural '
'origin",-77,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
'factor at natural '
'origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
'easting",550000,LENGTHUNIT["Clarke\'s '
'foot",0.3047972654],ID["EPSG",8806]],PARAMETER["False '
'northing",400000,LENGTHUNIT["Clarke\'s '
'foot",0.3047972654],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["Clarke\'s '
'foot",0.3047972654]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["Clarke\'s '
'foot",0.3047972654]],USAGE[SCOPE["Cadastre, engineering survey, '
'topographic mapping (large and medium scale)."],AREA["Jamaica - '
'onshore."],BBOX[17.64,-78.43,18.58,-76.17]],ID["EPSG",24100]]',
'false_easting': 550000.0,
'false_northing': 400000.0,
'geographic_crs_name': 'Jamaica 1875',
'grid_mapping_name': 'lambert_conformal_conic',
'horizontal_datum_name': 'Jamaica 1875',
'inverse_flattening': 293.46630765563646,
'longitude_of_central_meridian': -77.0,
'longitude_of_prime_meridian': 0.0,
'prime_meridian_name': 'Greenwich',
'projected_crs_name': 'Jamaica 1875 / Jamaica (Old Grid)',
'reference_ellipsoid_name': 'Clarke 1880',
'semi_major_axis': 6378249.144808011,
'semi_minor_axis': 6356514.966204134,
'standard_parallel': 18.0}