EPSG:29873 - Timbalai 1948 / RSO Borneo (m)

{
  "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
  "type": "ProjectedCRS",
  "name": "Timbalai 1948 / RSO Borneo (m)",
  "base_crs": {
    "name": "Timbalai 1948",
    "datum": {
      "type": "GeodeticReferenceFrame",
      "name": "Timbalai 1948",
      "ellipsoid": {
        "name": "Everest 1830 (1967 Definition)",
        "semi_major_axis": 6377298.556,
        "inverse_flattening": 300.8017
      }
    },
    "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": 4298
    }
  },
  "conversion": {
    "name": "Rectified Skew Orthomorphic Borneo Grid (metre)",
    "method": {
      "name": "Hotine Oblique Mercator (variant B)",
      "id": {
        "authority": "EPSG",
        "code": 9815
      }
    },
    "parameters": [
      {
        "name": "Latitude of projection centre",
        "value": 4,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8811
        }
      },
      {
        "name": "Longitude of projection centre",
        "value": 115,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8812
        }
      },
      {
        "name": "Azimuth at projection centre",
        "value": 53.3158204722222,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8813
        }
      },
      {
        "name": "Angle from Rectified to Skew Grid",
        "value": 53.1301023611111,
        "unit": "degree",
        "id": {
          "authority": "EPSG",
          "code": 8814
        }
      },
      {
        "name": "Scale factor at projection centre",
        "value": 0.99984,
        "unit": "unity",
        "id": {
          "authority": "EPSG",
          "code": 8815
        }
      },
      {
        "name": "Easting at projection centre",
        "value": 590476.87,
        "unit": "metre",
        "id": {
          "authority": "EPSG",
          "code": 8816
        }
      },
      {
        "name": "Northing at projection centre",
        "value": 442857.65,
        "unit": "metre",
        "id": {
          "authority": "EPSG",
          "code": 8817
        }
      }
    ]
  },
  "coordinate_system": {
    "subtype": "Cartesian",
    "axis": [
      {
        "name": "Easting",
        "abbreviation": "E",
        "direction": "east",
        "unit": "metre"
      },
      {
        "name": "Northing",
        "abbreviation": "N",
        "direction": "north",
        "unit": "metre"
      }
    ]
  },
  "scope": "Exploration and production operations in Brunei. Formerly also topographic mapping (large and medium scale) and engineering survey.",
  "area": "Brunei - onshore and offshore; Malaysia - East Malaysia (Sabah; Sarawak) - onshore and offshore.",
  "bbox": {
    "south_latitude": 0.85,
    "west_longitude": 109.31,
    "north_latitude": 7.67,
    "east_longitude": 119.61
  },
  "id": {
    "authority": "EPSG",
    "code": 29873
  }
}

{'azimuth_of_central_line': 53.31582047222222,
 'crs_wkt': 'PROJCRS["Timbalai 1948 / RSO Borneo (m)",BASEGEOGCRS["Timbalai '
            '1948",DATUM["Timbalai 1948",ELLIPSOID["Everest 1830 (1967 '
            'Definition)",6377298.556,300.8017,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4298]],CONVERSION["Rectified '
            'Skew Orthomorphic Borneo Grid (metre)",METHOD["Hotine Oblique '
            'Mercator (variant B)",ID["EPSG",9815]],PARAMETER["Latitude of '
            'projection '
            'centre",4,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8811]],PARAMETER["Longitude '
            'of projection '
            'centre",115,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8812]],PARAMETER["Azimuth '
            'at projection '
            'centre",53.3158204722222,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8813]],PARAMETER["Angle '
            'from Rectified to Skew '
            'Grid",53.1301023611111,ANGLEUNIT["degree",0.0174532925199433],ID["EPSG",8814]],PARAMETER["Scale '
            'factor at projection '
            'centre",0.99984,SCALEUNIT["unity",1],ID["EPSG",8815]],PARAMETER["Easting '
            'at projection '
            'centre",590476.87,LENGTHUNIT["metre",1],ID["EPSG",8816]],PARAMETER["Northing '
            'at projection '
            'centre",442857.65,LENGTHUNIT["metre",1],ID["EPSG",8817]]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["metre",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["metre",1]],USAGE[SCOPE["Exploration '
            'and production operations in Brunei. Formerly also topographic '
            'mapping (large and medium scale) and engineering '
            'survey."],AREA["Brunei - onshore and offshore; Malaysia - East '
            'Malaysia (Sabah; Sarawak) - onshore and '
            'offshore."],BBOX[0.85,109.31,7.67,119.61]],ID["EPSG",29873]]',
 'false_easting': 590476.87,
 'false_northing': 442857.65,
 'geographic_crs_name': 'Timbalai 1948',
 'grid_mapping_name': 'oblique_mercator',
 'horizontal_datum_name': 'Timbalai 1948',
 'inverse_flattening': 300.8017,
 'latitude_of_projection_origin': 4.0,
 'longitude_of_prime_meridian': 0.0,
 'longitude_of_projection_origin': 115.0,
 'prime_meridian_name': 'Greenwich',
 'projected_crs_name': 'Timbalai 1948 / RSO Borneo (m)',
 'reference_ellipsoid_name': 'Everest 1830 (1967 Definition)',
 'scale_factor_at_projection_origin': 0.99984,
 'semi_major_axis': 6377298.556,
 'semi_minor_axis': 6356097.550300896}