EPSG:3388 - Pulkovo 1942 / Caspian Sea Mercator

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "ProjectedCRS",
  "name": "Pulkovo 1942 / Caspian Sea Mercator",
  "base_crs": {
    "name": "Pulkovo 1942",
    "datum": {
      "type": "GeodeticReferenceFrame",
      "name": "Pulkovo 1942",
      "ellipsoid": {
        "name": "Krassowsky 1940",
        "semi_major_axis": 6378245,
        "inverse_flattening": 298.3
      }
    },
    "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": 4284
    }
  },
  "conversion": {
    "name": "Caspian Sea Mercator",
    "method": {
      "name": "Mercator (variant B)",
      "id": {
        "authority": "EPSG",
        "code": 9805
      }
    },
    "parameters": [
      {
        "name": "Latitude of 1st standard parallel",
        "value": 42,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8823
        }
      },
      {
        "name": "Longitude of natural origin",
        "value": 51,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8802
        }
      },
      {
        "name": "False easting",
        "value": 0,
        "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": "Northing",
        "abbreviation": "none",
        "direction": "north",
        "unit": "metre"
      },
      {
        "name": "Easting",
        "abbreviation": "none",
        "direction": "east",
        "unit": "metre"
      }
    ]
  },
  "scope": "Hydrography and nautical charting.",
  "area": "Azerbaijan - offshore; Kazakhstan - offshore; Russian Federation - Caspian Sea; Turkmenistan - offshore.",
  "bbox": {
    "south_latitude": 37.35,
    "west_longitude": 46.95,
    "north_latitude": 46.97,
    "east_longitude": 53.93
  },
  "id": {
    "authority": "EPSG",
    "code": 3388
  }
}

{'crs_wkt': 'PROJCRS["Pulkovo 1942 / Caspian Sea '
            'Mercator",BASEGEOGCRS["Pulkovo 1942",DATUM["Pulkovo '
            '1942",ELLIPSOID["Krassowsky '
            '1940",6378245,298.3,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4284]],CONVERSION["Caspian '
            'Sea Mercator",METHOD["Mercator (variant '
            'B)",ID["EPSG",9805]],PARAMETER["Latitude of 1st standard '
            'parallel",42,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8823]],PARAMETER["Longitude '
            'of natural '
            'origin",51,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["False '
            'easting",0,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
            'northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["northing '
            '(none)",north,ORDER[1],LENGTHUNIT["metre",1]],AXIS["easting '
            '(none)",east,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Hydrography '
            'and nautical charting."],AREA["Azerbaijan - offshore; Kazakhstan '
            '- offshore; Russian Federation - Caspian Sea; Turkmenistan - '
            'offshore."],BBOX[37.35,46.95,46.97,53.93]],ID["EPSG",3388]]',
 'false_easting': 0.0,
 'false_northing': 0.0,
 'geographic_crs_name': 'Pulkovo 1942',
 'grid_mapping_name': 'mercator',
 'horizontal_datum_name': 'Pulkovo 1942',
 'inverse_flattening': 298.3,
 'longitude_of_prime_meridian': 0.0,
 'longitude_of_projection_origin': 51.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'Pulkovo 1942 / Caspian Sea Mercator',
 'reference_ellipsoid_name': 'Krassowsky 1940',
 'semi_major_axis': 6378245.0,
 'semi_minor_axis': 6356863.018773047,
 'standard_parallel': 42.0}