EPSG:9527 - NZGD2000 + NZVD2009 height

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "CompoundCRS",
  "name": "NZGD2000 + NZVD2009 height",
  "components": [
    {
      "type": "GeographicCRS",
      "name": "NZGD2000",
      "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "New Zealand Geodetic Datum 2000",
        "ellipsoid": {
          "name": "GRS 1980",
          "semi_major_axis": 6378137,
          "inverse_flattening": 298.257222101
        }
      },
      "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
          {
            "name": "Geodetic latitude",
            "abbreviation": "Lat",
            "direction": "north",
            "unit": "degree"
          },
          {
            "name": "Geodetic longitude",
            "abbreviation": "Lon",
            "direction": "east",
            "unit": "degree"
          }
        ]
      }
    },
    {
      "type": "VerticalCRS",
      "name": "NZVD2009 height",
      "datum": {
        "type": "VerticalReferenceFrame",
        "name": "New Zealand Vertical Datum 2009"
      },
      "coordinate_system": {
        "subtype": "vertical",
        "axis": [
          {
            "name": "Gravity-related height",
            "abbreviation": "H",
            "direction": "up",
            "unit": "metre"
          }
        ]
      }
    }
  ],
  "scope": "Spatial referencing.",
  "area": "New Zealand - onshore and offshore. Includes Antipodes Islands, Auckland Islands, Bounty Islands, Chatham Islands, Cambell Island, Kermadec Islands, Raoul Island and Snares Islands.",
  "bbox": {
    "south_latitude": -55.95,
    "west_longitude": 160.6,
    "north_latitude": -25.88,
    "east_longitude": -171.2
  },
  "id": {
    "authority": "EPSG",
    "code": 9527
  }
}

{'crs_wkt': 'COMPOUNDCRS["NZGD2000 + NZVD2009 '
            'height",GEOGCRS["NZGD2000",DATUM["New Zealand Geodetic Datum '
            '2000",ELLIPSOID["GRS '
            '1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic '
            'latitude '
            '(Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic '
            'longitude '
            '(Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]]],VERTCRS["NZVD2009 '
            'height",VDATUM["New Zealand Vertical Datum '
            '2009"],CS[vertical,1],AXIS["gravity-related height '
            '(H)",up,LENGTHUNIT["metre",1]]],USAGE[SCOPE["Spatial '
            'referencing."],AREA["New Zealand - onshore and offshore. Includes '
            'Antipodes Islands, Auckland Islands, Bounty Islands, Chatham '
            'Islands, Cambell Island, Kermadec Islands, Raoul Island and '
            'Snares '
            'Islands."],BBOX[-55.95,160.6,-25.88,-171.2]],ID["EPSG",9527]]',
 'geographic_crs_name': 'NZGD2000',
 'geopotential_datum_name': 'New Zealand Vertical Datum 2009',
 'grid_mapping_name': 'latitude_longitude',
 'horizontal_datum_name': 'New Zealand Geodetic Datum 2000',
 'inverse_flattening': 298.257222101,
 'longitude_of_prime_meridian': 0.0,
 'prime_meridian_name': 'Greenwich',
 'reference_ellipsoid_name': 'GRS 1980',
 'semi_major_axis': 6378137.0,
 'semi_minor_axis': 6356752.314140356}