EPSG:10275 - SMITB20 Grid

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "ProjectedCRS",
  "name": "SMITB20 Grid",
  "base_crs": {
    "name": "SMITB20-IRF",
    "datum": {
      "type": "GeodeticReferenceFrame",
      "name": "SMITB20 Intermediate Reference Frame",
      "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": 10272
    }
  },
  "conversion": {
    "name": "SMITB20-TM",
    "method": {
      "name": "Transverse Mercator",
      "id": {
        "authority": "EPSG",
        "code": 9807
      }
    },
    "parameters": [
      {
        "name": "Latitude of natural origin",
        "value": 50.75,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8801
        }
      },
      {
        "name": "Longitude of natural origin",
        "value": -3.85,
        "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": 110693.666,
        "unit": "metre",
        "id": {
          "authority": "EPSG",
          "code": 8806
        }
      },
      {
        "name": "False northing",
        "value": 102089.2943,
        "unit": "metre",
        "id": {
          "authority": "EPSG",
          "code": 8807
        }
      }
    ]
  },
  "coordinate_system": {
    "subtype": "Cartesian",
    "axis": [
      {
        "name": "Easting",
        "abbreviation": "E",
        "direction": "east",
        "unit": "metre"
      },
      {
        "name": "Northing",
        "abbreviation": "N",
        "direction": "north",
        "unit": "metre"
      }
    ]
  },
  "scope": "Engineering survey and topographic mapping for railway applications.",
  "area": "United Kingdom (UK) - on or related to the rail route from Okehampton to Penstone.",
  "bbox": {
    "south_latitude": 50.65,
    "west_longitude": -4.11,
    "north_latitude": 50.86,
    "east_longitude": -3.6
  },
  "id": {
    "authority": "EPSG",
    "code": 10275
  }
}

{'crs_wkt': 'PROJCRS["SMITB20 Grid",BASEGEOGCRS["SMITB20-IRF",DATUM["SMITB20 '
            'Intermediate Reference Frame",ELLIPSOID["GRS '
            '1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",10272]],CONVERSION["SMITB20-TM",METHOD["Transverse '
            'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
            'origin",50.75,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
            'of natural '
            'origin",-3.85,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
            'factor at natural '
            'origin",1,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False '
            'easting",110693.666,LENGTHUNIT["metre",1],ID["EPSG",8806]],PARAMETER["False '
            'northing",102089.2943,LENGTHUNIT["metre",1],ID["EPSG",8807]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering '
            'survey and topographic mapping for railway '
            'applications."],AREA["United Kingdom (UK) - on or related to the '
            'rail route from Okehampton to '
            'Penstone."],BBOX[50.65,-4.11,50.86,-3.6]],ID["EPSG",10275]]',
 'false_easting': 110693.666,
 'false_northing': 102089.2943,
 'geographic_crs_name': 'SMITB20-IRF',
 'grid_mapping_name': 'transverse_mercator',
 'horizontal_datum_name': 'SMITB20 Intermediate Reference Frame',
 'inverse_flattening': 298.257222101,
 'latitude_of_projection_origin': 50.75,
 'longitude_of_central_meridian': -3.85,
 'longitude_of_prime_meridian': 0.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'SMITB20 Grid',
 'reference_ellipsoid_name': 'GRS 1980',
 'scale_factor_at_central_meridian': 1.0,
 'semi_major_axis': 6378137.0,
 'semi_minor_axis': 6356752.314140356}