metre
Engineering survey, topographic mapping.
None
France - Alsace.
Data Source: EPSG v11.016 2024-08-31
Datum: Ancienne Triangulation Francaise (Paris)
Coordinate System: cartesian
Projection: Nord de Guerre
Geodetic CRS: ATF (Paris)
PROJCRS["ATF (Paris) / Nord de Guerre",
BASEGEOGCRS["ATF (Paris)",
DATUM["Ancienne Triangulation Francaise (Paris)",
ELLIPSOID["Plessis 1817",6376523,308.64,
LENGTHUNIT["metre",1]]],
PRIMEM["Paris RGS",2.33720833333333,
ANGLEUNIT["degree",0.0174532925199433]],
ID["EPSG",4901]],
CONVERSION["Nord de Guerre",
METHOD["Lambert Conic Conformal (1SP)",
ID["EPSG",9801]],
PARAMETER["Latitude of natural origin",55,
ANGLEUNIT["grad",0.0157079632679489],
ID["EPSG",8801]],
PARAMETER["Longitude of natural origin",6,
ANGLEUNIT["grad",0.0157079632679489],
ID["EPSG",8802]],
PARAMETER["Scale factor at natural origin",0.99950908,
SCALEUNIT["unity",1],
ID["EPSG",8805]],
PARAMETER["False easting",500000,
LENGTHUNIT["metre",1],
ID["EPSG",8806]],
PARAMETER["False northing",300000,
LENGTHUNIT["metre",1],
ID["EPSG",8807]]],
CS[Cartesian,2],
AXIS["easting (X)",east,
ORDER[1],
LENGTHUNIT["metre",1]],
AXIS["northing (Y)",north,
ORDER[2],
LENGTHUNIT["metre",1]],
USAGE[
SCOPE["Engineering survey, topographic mapping."],
AREA["France - Alsace."],
BBOX[47.42,6.84,49.07,8.23]],
ID["EPSG",27500]]
{
"$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
"type": "ProjectedCRS",
"name": "ATF (Paris) / Nord de Guerre",
"base_crs": {
"name": "ATF (Paris)",
"datum": {
"type": "GeodeticReferenceFrame",
"name": "Ancienne Triangulation Francaise (Paris)",
"ellipsoid": {
"name": "Plessis 1817",
"semi_major_axis": 6376523,
"inverse_flattening": 308.64
},
"prime_meridian": {
"name": "Paris RGS",
"longitude": 2.33720833333333
}
},
"coordinate_system": {
"subtype": "ellipsoidal",
"axis": [
{
"name": "Geodetic latitude",
"abbreviation": "Lat",
"direction": "north",
"unit": {
"type": "AngularUnit",
"name": "grad",
"conversion_factor": 0.0157079632679489
}
},
{
"name": "Geodetic longitude",
"abbreviation": "Lon",
"direction": "east",
"unit": {
"type": "AngularUnit",
"name": "grad",
"conversion_factor": 0.0157079632679489
}
}
]
},
"id": {
"authority": "EPSG",
"code": 4901
}
},
"conversion": {
"name": "Nord de Guerre",
"method": {
"name": "Lambert Conic Conformal (1SP)",
"id": {
"authority": "EPSG",
"code": 9801
}
},
"parameters": [
{
"name": "Latitude of natural origin",
"value": 55,
"unit": {
"type": "AngularUnit",
"name": "grad",
"conversion_factor": 0.0157079632679489
},
"id": {
"authority": "EPSG",
"code": 8801
}
},
{
"name": "Longitude of natural origin",
"value": 6,
"unit": {
"type": "AngularUnit",
"name": "grad",
"conversion_factor": 0.0157079632679489
},
"id": {
"authority": "EPSG",
"code": 8802
}
},
{
"name": "Scale factor at natural origin",
"value": 0.99950908,
"unit": "unity",
"id": {
"authority": "EPSG",
"code": 8805
}
},
{
"name": "False easting",
"value": 500000,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8806
}
},
{
"name": "False northing",
"value": 300000,
"unit": "metre",
"id": {
"authority": "EPSG",
"code": 8807
}
}
]
},
"coordinate_system": {
"subtype": "Cartesian",
"axis": [
{
"name": "Easting",
"abbreviation": "X",
"direction": "east",
"unit": "metre"
},
{
"name": "Northing",
"abbreviation": "Y",
"direction": "north",
"unit": "metre"
}
]
},
"scope": "Engineering survey, topographic mapping.",
"area": "France - Alsace.",
"bbox": {
"south_latitude": 47.42,
"west_longitude": 6.84,
"north_latitude": 49.07,
"east_longitude": 8.23
},
"id": {
"authority": "EPSG",
"code": 27500
}
}
{'crs_wkt': 'PROJCRS["ATF (Paris) / Nord de Guerre",BASEGEOGCRS["ATF '
'(Paris)",DATUM["Ancienne Triangulation Francaise '
'(Paris)",ELLIPSOID["Plessis '
'1817",6376523,308.64,LENGTHUNIT["metre",1]]],PRIMEM["Paris '
'RGS",2.33720833333333,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4901]],CONVERSION["Nord '
'de Guerre",METHOD["Lambert Conic Conformal '
'(1SP)",ID["EPSG",9801]],PARAMETER["Latitude of natural '
'origin",55,ANGLEUNIT["grad",0.0157079632679489],ID["EPSG",8801]],PARAMETER["Longitude '
'of natural '
'origin",6,ANGLEUNIT["grad",0.0157079632679489],ID["EPSG",8802]],PARAMETER["Scale '
'factor at natural '
'origin",0.99950908,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
'easting",500000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
'northing",300000,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["easting '
'(X)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["northing '
'(Y)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering '
'survey, topographic mapping."],AREA["France - '
'Alsace."],BBOX[47.42,6.84,49.07,8.23]],ID["EPSG",27500]]',
'false_easting': 500000.0,
'false_northing': 300000.0,
'geographic_crs_name': 'ATF (Paris)',
'grid_mapping_name': 'lambert_conformal_conic',
'horizontal_datum_name': 'Ancienne Triangulation Francaise (Paris)',
'inverse_flattening': 308.64,
'longitude_of_central_meridian': 6.0,
'longitude_of_prime_meridian': 2.3372083333333333,
'prime_meridian_name': 'Paris RGS',
'projected_crs_name': 'ATF (Paris) / Nord de Guerre',
'reference_ellipsoid_name': 'Plessis 1817',
'semi_major_axis': 6376523.0,
'semi_minor_axis': 6355862.933255573,
'standard_parallel': 55.0}