EPSG:4978 - WGS 84

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "GeodeticCRS",
  "name": "WGS 84",
  "datum_ensemble": {
    "name": "World Geodetic System 1984 ensemble",
    "members": [
      {
        "name": "World Geodetic System 1984 (Transit)",
        "id": {
          "authority": "EPSG",
          "code": 1166
        }
      },
      {
        "name": "World Geodetic System 1984 (G730)",
        "id": {
          "authority": "EPSG",
          "code": 1152
        }
      },
      {
        "name": "World Geodetic System 1984 (G873)",
        "id": {
          "authority": "EPSG",
          "code": 1153
        }
      },
      {
        "name": "World Geodetic System 1984 (G1150)",
        "id": {
          "authority": "EPSG",
          "code": 1154
        }
      },
      {
        "name": "World Geodetic System 1984 (G1674)",
        "id": {
          "authority": "EPSG",
          "code": 1155
        }
      },
      {
        "name": "World Geodetic System 1984 (G1762)",
        "id": {
          "authority": "EPSG",
          "code": 1156
        }
      },
      {
        "name": "World Geodetic System 1984 (G2139)",
        "id": {
          "authority": "EPSG",
          "code": 1309
        }
      },
      {
        "name": "World Geodetic System 1984 (G2296)",
        "id": {
          "authority": "EPSG",
          "code": 1383
        }
      }
    ],
    "ellipsoid": {
      "name": "WGS 84",
      "semi_major_axis": 6378137,
      "inverse_flattening": 298.257223563
    },
    "accuracy": "2.0",
    "id": {
      "authority": "EPSG",
      "code": 6326
    }
  },
  "coordinate_system": {
    "subtype": "Cartesian",
    "axis": [
      {
        "name": "Geocentric X",
        "abbreviation": "X",
        "direction": "geocentricX",
        "unit": "metre"
      },
      {
        "name": "Geocentric Y",
        "abbreviation": "Y",
        "direction": "geocentricY",
        "unit": "metre"
      },
      {
        "name": "Geocentric Z",
        "abbreviation": "Z",
        "direction": "geocentricZ",
        "unit": "metre"
      }
    ]
  },
  "scope": "Geodesy. Navigation and positioning using GPS satellite system.",
  "area": "World.",
  "bbox": {
    "south_latitude": -90,
    "west_longitude": -180,
    "north_latitude": 90,
    "east_longitude": 180
  },
  "id": {
    "authority": "EPSG",
    "code": 4978
  }
}

{'crs_wkt': 'GEODCRS["WGS 84",ENSEMBLE["World Geodetic System 1984 '
            'ensemble",MEMBER["World Geodetic System 1984 '
            '(Transit)"],MEMBER["World Geodetic System 1984 '
            '(G730)"],MEMBER["World Geodetic System 1984 '
            '(G873)"],MEMBER["World Geodetic System 1984 '
            '(G1150)"],MEMBER["World Geodetic System 1984 '
            '(G1674)"],MEMBER["World Geodetic System 1984 '
            '(G1762)"],MEMBER["World Geodetic System 1984 '
            '(G2139)"],MEMBER["World Geodetic System 1984 '
            '(G2296)"],ELLIPSOID["WGS '
            '84",6378137,298.257223563,LENGTHUNIT["metre",1]],ENSEMBLEACCURACY[2.0]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[Cartesian,3],AXIS["(X)",geocentricX,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(Y)",geocentricY,ORDER[2],LENGTHUNIT["metre",1]],AXIS["(Z)",geocentricZ,ORDER[3],LENGTHUNIT["metre",1]],USAGE[SCOPE["Geodesy. '
            'Navigation and positioning using GPS satellite '
            'system."],AREA["World."],BBOX[-90,-180,90,180]],ID["EPSG",4978]]'}