EPSG:5850 - SWEREF99 18 00 + RH2000 height

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "CompoundCRS",
  "name": "SWEREF99 18 00 + RH2000 height",
  "components": [
    {
      "type": "ProjectedCRS",
      "name": "SWEREF99 18 00",
      "base_crs": {
        "name": "SWEREF99",
        "datum": {
          "type": "GeodeticReferenceFrame",
          "name": "SWEREF99",
          "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"
            }
          ]
        },
        "id": {
          "authority": "EPSG",
          "code": 4619
        }
      },
      "conversion": {
        "name": "SWEREF99 18 00",
        "method": {
          "name": "Transverse Mercator",
          "id": {
            "authority": "EPSG",
            "code": 9807
          }
        },
        "parameters": [
          {
            "name": "Latitude of natural origin",
            "value": 0,
            "unit": "degree",
            "id": {
              "authority": "EPSG",
              "code": 8801
            }
          },
          {
            "name": "Longitude of natural origin",
            "value": 18,
            "unit": "degree",
            "id": {
              "authority": "EPSG",
              "code": 8802
            }
          },
          {
            "name": "Scale factor at natural origin",
            "value": 1,
            "unit": "unity",
            "id": {
              "authority": "EPSG",
              "code": 8805
            }
          },
          {
            "name": "False easting",
            "value": 150000,
            "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": "N",
            "direction": "north",
            "unit": "metre"
          },
          {
            "name": "Easting",
            "abbreviation": "E",
            "direction": "east",
            "unit": "metre"
          }
        ]
      }
    },
    {
      "type": "VerticalCRS",
      "name": "RH2000 height",
      "datum": {
        "type": "DynamicVerticalReferenceFrame",
        "name": "Rikets hojdsystem 2000",
        "frame_reference_epoch": 2000
      },
      "coordinate_system": {
        "subtype": "vertical",
        "axis": [
          {
            "name": "Gravity-related height",
            "abbreviation": "H",
            "direction": "up",
            "unit": "metre"
          }
        ]
      }
    }
  ],
  "scope": "Engineering survey, topographic mapping.",
  "area": "Sweden - communes east of approximately 17°15'E between approximately 60°40'N and 58°50'N. See information source for map.",
  "bbox": {
    "south_latitude": 58.66,
    "west_longitude": 17.08,
    "north_latitude": 60.7,
    "east_longitude": 19.61
  },
  "id": {
    "authority": "EPSG",
    "code": 5850
  }
}

{'crs_wkt': 'COMPOUNDCRS["SWEREF99 18 00 + RH2000 height",PROJCRS["SWEREF99 18 '
            '00",BASEGEOGCRS["SWEREF99",DATUM["SWEREF99",ELLIPSOID["GRS '
            '1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4619]],CONVERSION["SWEREF99 '
            '18 00",METHOD["Transverse '
            'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
            'origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
            'of natural '
            'origin",18,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
            'factor at natural '
            'origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
            'easting",150000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
            'northing",0,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["northing '
            '(N)",north,ORDER[1],LENGTHUNIT["metre",1]],AXIS["easting '
            '(E)",east,ORDER[2],LENGTHUNIT["metre",1]]],VERTCRS["RH2000 '
            'height",DYNAMIC[FRAMEEPOCH[2000]],VDATUM["Rikets hojdsystem '
            '2000"],CS[vertical,1],AXIS["gravity-related height '
            '(H)",up,LENGTHUNIT["metre",1]]],USAGE[SCOPE["Engineering survey, '
            'topographic mapping."],AREA["Sweden - communes east of '
            "approximately 17°15'E between approximately 60°40'N and 58°50'N. "
            'See information source for '
            'map."],BBOX[58.66,17.08,60.7,19.61]],ID["EPSG",5850]]',
 'false_easting': 150000.0,
 'false_northing': 0.0,
 'geographic_crs_name': 'SWEREF99',
 'geopotential_datum_name': 'Rikets hojdsystem 2000',
 'grid_mapping_name': 'transverse_mercator',
 'horizontal_datum_name': 'SWEREF99',
 'inverse_flattening': 298.257222101,
 'latitude_of_projection_origin': 0.0,
 'longitude_of_central_meridian': 18.0,
 'longitude_of_prime_meridian': 0.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'SWEREF99 18 00',
 'reference_ellipsoid_name': 'GRS 1980',
 'scale_factor_at_central_meridian': 1.0,
 'semi_major_axis': 6378137.0,
 'semi_minor_axis': 6356752.314140356}