IGNF:MAYO50UTM38S.MAYO53 - Combani UTM Sud fuseau 38 et SHOM 1953 (MAYOTTE)

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "CompoundCRS",
  "name": "Combani UTM Sud fuseau 38 et SHOM 1953 (MAYOTTE)",
  "components": [
    {
      "type": "ProjectedCRS",
      "name": "Combani UTM Sud fuseau 38",
      "base_crs": {
        "name": "Combani triangulation IGN 1950 geographiques (dms)",
        "datum": {
          "type": "GeodeticReferenceFrame",
          "name": "Combani 1950",
          "ellipsoid": {
            "name": "International 1924",
            "semi_major_axis": 6378388,
            "inverse_flattening": 297
          }
        },
        "coordinate_system": {
          "subtype": "ellipsoidal",
          "axis": [
            {
              "name": "Geodetic longitude",
              "abbreviation": "Lon",
              "direction": "east",
              "unit": "degree"
            },
            {
              "name": "Geodetic latitude",
              "abbreviation": "Lat",
              "direction": "north",
              "unit": "degree"
            }
          ]
        },
        "id": {
          "authority": "IGNF",
          "code": "MAYO50G"
        }
      },
      "conversion": {
        "name": "UTM SUD FUSEAU 38",
        "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": 45,
            "unit": "degree",
            "id": {
              "authority": "EPSG",
              "code": 8802
            }
          },
          {
            "name": "Scale factor at natural origin",
            "value": 0.9996,
            "unit": "unity",
            "id": {
              "authority": "EPSG",
              "code": 8805
            }
          },
          {
            "name": "False easting",
            "value": 500000,
            "unit": "metre",
            "id": {
              "authority": "EPSG",
              "code": 8806
            }
          },
          {
            "name": "False northing",
            "value": 10000000,
            "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": "SHOM 1953 (MAYOTTE)",
      "datum": {
        "type": "VerticalReferenceFrame",
        "name": "SHOM 1953 (MAYOTTE)"
      },
      "coordinate_system": {
        "subtype": "vertical",
        "axis": [
          {
            "name": "Gravity-related height",
            "abbreviation": "H",
            "direction": "up",
            "unit": "metre"
          }
        ]
      }
    }
  ],
  "scope": "LOCALE, HISTORIQUE",
  "area": "ILE DE MAYOTTE",
  "bbox": {
    "south_latitude": -13.05,
    "west_longitude": 44.95,
    "north_latitude": -12.5,
    "east_longitude": 45.4
  },
  "id": {
    "authority": "IGNF",
    "code": "MAYO50UTM38S.MAYO53"
  }
}

{'crs_wkt': 'COMPOUNDCRS["Combani UTM Sud fuseau 38 et SHOM 1953 '
            '(MAYOTTE)",PROJCRS["Combani UTM Sud fuseau '
            '38",BASEGEOGCRS["Combani triangulation IGN 1950 geographiques '
            '(dms)",DATUM["Combani 1950",ELLIPSOID["International '
            '1924",6378388,297,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["IGNF","MAYO50G"]],CONVERSION["UTM '
            'SUD FUSEAU 38",METHOD["Transverse '
            'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
            'origin",0,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
            'of natural '
            'origin",45,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
            'factor at natural '
            'origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
            'easting",500000,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
            'northing",10000000,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["SHOM 1953 '
            '(MAYOTTE)",VDATUM["SHOM 1953 '
            '(MAYOTTE)"],CS[vertical,1],AXIS["gravity-related height '
            '(H)",up,LENGTHUNIT["metre",1]]],USAGE[SCOPE["LOCALE, '
            'HISTORIQUE"],AREA["ILE DE '
            'MAYOTTE"],BBOX[-13.05,44.95,-12.5,45.4]],ID["IGNF","MAYO50UTM38S.MAYO53"]]',
 'false_easting': 500000.0,
 'false_northing': 10000000.0,
 'geographic_crs_name': 'Combani triangulation IGN 1950 geographiques (dms)',
 'geopotential_datum_name': 'SHOM 1953 (MAYOTTE)',
 'grid_mapping_name': 'transverse_mercator',
 'horizontal_datum_name': 'Combani 1950',
 'inverse_flattening': 297.0,
 'latitude_of_projection_origin': 0.0,
 'longitude_of_central_meridian': 45.0,
 'longitude_of_prime_meridian': 0.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'Combani UTM Sud fuseau 38',
 'reference_ellipsoid_name': 'International 1924',
 'scale_factor_at_central_meridian': 0.9996,
 'semi_major_axis': 6378388.0,
 'semi_minor_axis': 6356911.9461279465}