EPSG:7401 - NTF (Paris) / France II + NGF Lallemand

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "CompoundCRS",
  "name": "NTF (Paris) / France II + NGF Lallemand",
  "components": [
    {
      "type": "ProjectedCRS",
      "name": "NTF (Paris) / France II",
      "base_crs": {
        "name": "NTF (Paris)",
        "datum": {
          "type": "GeodeticReferenceFrame",
          "name": "Nouvelle Triangulation Francaise (Paris)",
          "ellipsoid": {
            "name": "Clarke 1880 (IGN)",
            "semi_major_axis": 6378249.2,
            "semi_minor_axis": 6356515
          },
          "prime_meridian": {
            "name": "Paris",
            "longitude": {
              "value": 2.5969213,
              "unit": {
                "type": "AngularUnit",
                "name": "grad",
                "conversion_factor": 0.0157079632679489
              }
            }
          }
        },
        "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": 4807
        }
      },
      "conversion": {
        "name": "Lambert zone II",
        "method": {
          "name": "Lambert Conic Conformal (1SP)",
          "id": {
            "authority": "EPSG",
            "code": 9801
          }
        },
        "parameters": [
          {
            "name": "Latitude of natural origin",
            "value": 52,
            "unit": {
              "type": "AngularUnit",
              "name": "grad",
              "conversion_factor": 0.0157079632679489
            },
            "id": {
              "authority": "EPSG",
              "code": 8801
            }
          },
          {
            "name": "Longitude of natural origin",
            "value": 0,
            "unit": {
              "type": "AngularUnit",
              "name": "grad",
              "conversion_factor": 0.0157079632679489
            },
            "id": {
              "authority": "EPSG",
              "code": 8802
            }
          },
          {
            "name": "Scale factor at natural origin",
            "value": 0.99987742,
            "unit": "unity",
            "id": {
              "authority": "EPSG",
              "code": 8805
            }
          },
          {
            "name": "False easting",
            "value": 600000,
            "unit": "metre",
            "id": {
              "authority": "EPSG",
              "code": 8806
            }
          },
          {
            "name": "False northing",
            "value": 2200000,
            "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"
          }
        ]
      }
    },
    {
      "type": "VerticalCRS",
      "name": "NGF Lallemand height",
      "datum": {
        "type": "VerticalReferenceFrame",
        "name": "Nivellement General de la France - Lallemand"
      },
      "coordinate_system": {
        "subtype": "vertical",
        "axis": [
          {
            "name": "Gravity-related height",
            "abbreviation": "H",
            "direction": "up",
            "unit": "metre"
          }
        ]
      }
    }
  ],
  "scope": "Engineering survey, topographic mapping.",
  "area": "France - mainland onshore.",
  "bbox": {
    "south_latitude": 42.33,
    "west_longitude": -4.87,
    "north_latitude": 51.14,
    "east_longitude": 8.23
  },
  "id": {
    "authority": "EPSG",
    "code": 7401
  }
}

{'crs_wkt': 'COMPOUNDCRS["NTF (Paris) / France II + NGF '
            'Lallemand",PROJCRS["NTF (Paris) / France II",BASEGEOGCRS["NTF '
            '(Paris)",DATUM["Nouvelle Triangulation Francaise '
            '(Paris)",ELLIPSOID["Clarke 1880 '
            '(IGN)",6378249.2,293.466021293627,LENGTHUNIT["metre",1]]],PRIMEM["Paris",2.5969213,ANGLEUNIT["grad",0.0157079632679489]],ID["EPSG",4807]],CONVERSION["Lambert '
            'zone II",METHOD["Lambert Conic Conformal '
            '(1SP)",ID["EPSG",9801]],PARAMETER["Latitude of natural '
            'origin",52,ANGLEUNIT["grad",0.0157079632679489],ID["EPSG",8801]],PARAMETER["Longitude '
            'of natural '
            'origin",0,ANGLEUNIT["grad",0.0157079632679489],ID["EPSG",8802]],PARAMETER["Scale '
            'factor at natural '
            'origin",0.99987742,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
            'easting",600000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
            'northing",2200000,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]]],VERTCRS["NGF '
            'Lallemand height",VDATUM["Nivellement General de la France - '
            'Lallemand"],CS[vertical,1],AXIS["gravity-related height '
            '(H)",up,LENGTHUNIT["metre",1]]],USAGE[SCOPE["Engineering survey, '
            'topographic mapping."],AREA["France - mainland '
            'onshore."],BBOX[42.33,-4.87,51.14,8.23]],ID["EPSG",7401]]',
 'false_easting': 600000.0,
 'false_northing': 2200000.0,
 'geographic_crs_name': 'NTF (Paris)',
 'geopotential_datum_name': 'Nivellement General de la France - Lallemand',
 'grid_mapping_name': 'lambert_conformal_conic',
 'horizontal_datum_name': 'Nouvelle Triangulation Francaise (Paris)',
 'inverse_flattening': 293.466021293627,
 'longitude_of_central_meridian': 0.0,
 'longitude_of_prime_meridian': 2.5969213,
 'prime_meridian_name': 'Paris',
 'projected_crs_name': 'NTF (Paris) / France II',
 'reference_ellipsoid_name': 'Clarke 1880 (IGN)',
 'semi_major_axis': 6378249.2,
 'semi_minor_axis': 6356515.0,
 'standard_parallel': 52.0}