metre
Engineering survey, topographic mapping.
None
United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
Data Source: EPSG v11.016 2024-08-31
Datum: OSNI 1952
Coordinate System: cartesian
Projection: Irish National Grid
Geodetic CRS: OSNI 1952
PROJCRS["OSNI 1952 / Irish National Grid",
BASEGEOGCRS["OSNI 1952",
DATUM["OSNI 1952",
ELLIPSOID["Airy 1830",6377563.396,299.3249646,
LENGTHUNIT["metre",1]]],
PRIMEM["Greenwich",0,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4188]],
CONVERSION["Irish National Grid",
METHOD["Transverse Mercator",
ID["EPSG",9807]],
PARAMETER["Latitude of natural origin",53.5,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8801]],
PARAMETER["Longitude of natural origin",-8,
ANGLEUNIT["degree",0.0174532925199433],
ID["EPSG",8802]],
PARAMETER["Scale factor at natural origin",1,
SCALEUNIT["unity",1],
ID["EPSG",8805]],
PARAMETER["False easting",200000,
LENGTHUNIT["metre",1],
ID["EPSG",8806]],
PARAMETER["False northing",250000,
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["United Kingdom (UK) - Northern Ireland (Ulster) - onshore."],
BBOX[53.96,-8.18,55.36,-5.34]],
ID["EPSG",29901]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "ProjectedCRS",
"name": "OSNI 1952 / Irish National Grid",
"base_crs": {
"name": "OSNI 1952",
"datum": {
"type": "GeodeticReferenceFrame",
"name": "OSNI 1952",
"ellipsoid": {
"name": "Airy 1830",
"semi_major_axis": 6377563.396,
"inverse_flattening": 299.3249646
}
},
"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": 4188
}
},
"conversion": {
"name": "Irish National Grid",
"method": {
"name": "Transverse Mercator",
"id": {
"authority": "EPSG",
"code": 9807
}
},
"parameters": [
{
"name": "Latitude of natural origin",
"value": 53.5,
"unit": "degree",
"id": {
"authority": "EPSG",
"code": 8801
}
},
{
"name": "Longitude of natural origin",
"value": -8,
"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": 200000,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 250000,
"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": "United Kingdom (UK) - Northern Ireland (Ulster) - onshore.",
"bbox": {
"south_latitude": 53.96,
"west_longitude": -8.18,
"north_latitude": 55.36,
"east_longitude": -5.34
},
"id": {
"authority": "EPSG",
"code": 29901
}
}
{'crs_wkt': 'PROJCRS["OSNI 1952 / Irish National Grid",BASEGEOGCRS["OSNI '
'1952",DATUM["OSNI 1952",ELLIPSOID["Airy '
'1830",6377563.396,299.3249646,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4188]],CONVERSION["Irish '
'National Grid",METHOD["Transverse '
'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
'origin",53.5,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
'of natural '
'origin",-8,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
'factor at natural '
'origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
'easting",200000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
'northing",250000,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["United Kingdom (UK) - '
'Northern Ireland (Ulster) - '
'onshore."],BBOX[53.96,-8.18,55.36,-5.34]],ID["EPSG",29901]]',
'false_easting': 200000.0,
'false_northing': 250000.0,
'geographic_crs_name': 'OSNI 1952',
'grid_mapping_name': 'transverse_mercator',
'horizontal_datum_name': 'OSNI 1952',
'inverse_flattening': 299.3249646,
'latitude_of_projection_origin': 53.5,
'longitude_of_central_meridian': -8.0,
'longitude_of_prime_meridian': 0.0,
'prime_meridian_name': 'Greenwich',
'projected_crs_name': 'OSNI 1952 / Irish National Grid',
'reference_ellipsoid_name': 'Airy 1830',
'scale_factor_at_central_meridian': 1.0,
'semi_major_axis': 6377563.396,
'semi_minor_axis': 6356256.909237285}