EPSG:2454 - JGD2000 / Japan Plane Rectangular CS XII

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "ProjectedCRS",
  "name": "JGD2000 / Japan Plane Rectangular CS XII",
  "base_crs": {
    "name": "JGD2000",
    "datum": {
      "type": "GeodeticReferenceFrame",
      "name": "Japanese 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"
        }
      ]
    },
    "id": {
      "authority": "EPSG",
      "code": 4612
    }
  },
  "conversion": {
    "name": "Japan Plane Rectangular CS zone XII",
    "method": {
      "name": "Transverse Mercator",
      "id": {
        "authority": "EPSG",
        "code": 9807
      }
    },
    "parameters": [
      {
        "name": "Latitude of natural origin",
        "value": 44,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8801
        }
      },
      {
        "name": "Longitude of natural origin",
        "value": 142.25,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8802
        }
      },
      {
        "name": "Scale factor at natural origin",
        "value": 0.9999,
        "unit": "unity",
        "id": {
          "authority": "EPSG",
          "code": 8805
        }
      },
      {
        "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": "X",
        "direction": "north",
        "unit": "metre"
      },
      {
        "name": "Easting",
        "abbreviation": "Y",
        "direction": "east",
        "unit": "metre"
      }
    ]
  },
  "scope": "Cadastre, engineering survey, topographic mapping (large and medium scale).",
  "area": "Japan - onshore - Hokkaido between approximately 141°E and 143°E - Sapporo city; Asahikawa city; Wakkanai city; Rumoi city; Bibai city; Yubari city; Iwamizawa city; Tomakomai city; Muroran city; Shibetsu city; Nayoro city; Ashibetsu city; Akabira city; Mikasa city; Takikawa city; Sunagawa city; Ebetsu city; Chitose city; Utashinai city; Fukagawa city; Monbetsu city; Furano city; Noboribetsu city; Eniwa city; Ishikari-shicho; Monbetsu-gun of Abashiri-shicho; Kamikawa-shicho; Soya-shicho; Hidaka-shicho; Iburi-shicho (except Usu-gun and Abuta-gun); Sorachi-shicho; Rumoi-shicho.",
  "bbox": {
    "south_latitude": 42.15,
    "west_longitude": 140.89,
    "north_latitude": 45.54,
    "east_longitude": 143.61
  },
  "id": {
    "authority": "EPSG",
    "code": 2454
  }
}

{'crs_wkt': 'PROJCRS["JGD2000 / Japan Plane Rectangular CS '
            'XII",BASEGEOGCRS["JGD2000",DATUM["Japanese Geodetic Datum '
            '2000",ELLIPSOID["GRS '
            '1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4612]],CONVERSION["Japan '
            'Plane Rectangular CS zone XII",METHOD["Transverse '
            'Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural '
            'origin",44,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude '
            'of natural '
            'origin",142.25,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale '
            'factor at natural '
            'origin",0.9999,SCALEUNIT["unity",1],ID["EPSG",8805]],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 '
            '(X)",north,ORDER[1],LENGTHUNIT["metre",1]],AXIS["easting '
            '(Y)",east,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Cadastre, '
            'engineering survey, topographic mapping (large and medium '
            'scale)."],AREA["Japan - onshore - Hokkaido between approximately '
            '141°E and 143°E - Sapporo city; Asahikawa city; Wakkanai city; '
            'Rumoi city; Bibai city; Yubari city; Iwamizawa city; Tomakomai '
            'city; Muroran city; Shibetsu city; Nayoro city; Ashibetsu city; '
            'Akabira city; Mikasa city; Takikawa city; Sunagawa city; Ebetsu '
            'city; Chitose city; Utashinai city; Fukagawa city; Monbetsu city; '
            'Furano city; Noboribetsu city; Eniwa city; Ishikari-shicho; '
            'Monbetsu-gun of Abashiri-shicho; Kamikawa-shicho; Soya-shicho; '
            'Hidaka-shicho; Iburi-shicho (except Usu-gun and Abuta-gun); '
            'Sorachi-shicho; '
            'Rumoi-shicho."],BBOX[42.15,140.89,45.54,143.61]],ID["EPSG",2454]]',
 'false_easting': 0.0,
 'false_northing': 0.0,
 'geographic_crs_name': 'JGD2000',
 'grid_mapping_name': 'transverse_mercator',
 'horizontal_datum_name': 'Japanese Geodetic Datum 2000',
 'inverse_flattening': 298.257222101,
 'latitude_of_projection_origin': 44.0,
 'longitude_of_central_meridian': 142.25,
 'longitude_of_prime_meridian': 0.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'JGD2000 / Japan Plane Rectangular CS XII',
 'reference_ellipsoid_name': 'GRS 1980',
 'scale_factor_at_central_meridian': 0.9999,
 'semi_major_axis': 6378137.0,
 'semi_minor_axis': 6356752.314140356}