metre
Engineering survey, topographic mapping.
None
Guinea - onshore west of 12°W.
Data Source: EPSG v11.016 2024-08-31
Datum: Dabola 1981
Coordinate System: cartesian
Projection: UTM zone 28N
Geodetic CRS: Dabola 1981
PROJCRS["Dabola 1981 / UTM zone 28N",
BASEGEOGCRS["Dabola 1981",
DATUM["Dabola 1981",
ELLIPSOID["Clarke 1880 (IGN)",6378249.2,293.466021293627,
LENGTHUNIT["metre",1]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4155]],
CONVERSION["UTM zone 28N",
METHOD["Transverse Mercator",
ID["EPSG",9807]],
PARAMETER["Latitude of natural origin",0,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8801]],
PARAMETER["Longitude of natural origin",-15,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8802]],
PARAMETER["Scale factor at natural origin",0.9996,
SCALEUNIT["unity",1],
ID["EPSG",8805]],
PARAMETER["False easting",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8806]],
PARAMETER["False northing",0,
LENGTHUNIT["metre",1],
ID["EPSG",8807]]],
CS[Cartesian,2],
AXIS["(E)",east,
ORDER[1],
LENGTHUNIT["metre",1]],
AXIS["(N)",north,
ORDER[2],
LENGTHUNIT["metre",1]],
USAGE[
SCOPE["Engineering survey, topographic mapping."],
AREA["Guinea - onshore west of 12°W."],
BBOX[9.01,-15.13,12.68,-12]],
ID["EPSG",3461]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "ProjectedCRS",
"name": "Dabola 1981 / UTM zone 28N",
"base_crs": {
"name": "Dabola 1981",
"datum": {
"type": "GeodeticReferenceFrame",
"name": "Dabola 1981",
"ellipsoid": {
"name": "Clarke 1880 (IGN)",
"semi_major_axis": 6378249.2,
"semi_minor_axis": 6356515
}
},
"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": 4155
}
},
"conversion": {
"name": "UTM zone 28N",
"method": {
"name": "Transverse Mercator",
"id": {
"authority": "EPSG",
"code": 9807
}
},
"parameters": [
{
"name": "Latitude of natural origin",
"value": 0,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8801
}
},
{
"name": "Longitude of natural origin",
"value": -15,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8802
}
},
{
"name": "Scale factor at natural origin",
"value": 0.9996,
"unit": "unity",
"id": {
"authority": "EPSG",
"code": 8805
}
},
{
"name": "False easting",
"value": 500000,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 0,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8807
}
}
]
},
"coordinate_system": {
"subtype": "Cartesian",
"axis": [
{
"name": "Easting",
"abbreviation": "E",
"direction": "east",
"unit": "metre"
},
{
"name": "Northing",
"abbreviation": "N",
"direction": "north",
"unit": "metre"
}
]
},
"scope": "Engineering survey, topographic mapping.",
"area": "Guinea - onshore west of 12°W.",
"bbox": {
"south_latitude": 9.01,
"west_longitude": -15.13,
"north_latitude": 12.68,
"east_longitude": -12
},
"id": {
"authority": "EPSG",
"code": 3461
}
}
{'crs_wkt': 'PROJCRS["Dabola 1981 / UTM zone 28N",BASEGEOGCRS["Dabola '
'1981",DATUM["Dabola 1981",ELLIPSOID["Clarke 1880 '
'(IGN)",6378249.2,293.466021293627,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4155]],CONVERSION["UTM '
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'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
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'origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
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'survey, topographic mapping."],AREA["Guinea - onshore west of '
'12°W."],BBOX[9.01,-15.13,12.68,-12]],ID["EPSG",3461]]',
'false_easting': 500000.0,
'false_northing': 0.0,
'geographic_crs_name': 'Dabola 1981',
'grid_mapping_name': 'transverse_mercator',
'horizontal_datum_name': 'Dabola 1981',
'inverse_flattening': 293.4660212936269,
'latitude_of_projection_origin': 0.0,
'longitude_of_central_meridian': -15.0,
'longitude_of_prime_meridian': 0.0,
'prime_meridian_name': 'Greenwich',
'projected_crs_name': 'Dabola 1981 / UTM zone 28N',
'reference_ellipsoid_name': 'Clarke 1880 (IGN)',
'scale_factor_at_central_meridian': 0.9996,
'semi_major_axis': 6378249.2,
'semi_minor_axis': 6356515.0}