EPSG:5270 — TUREF / 3-degree Gauss-Kruger zone 10

PROJCRS[
    "TUREF / 3-degree Gauss-Kruger zone 10",
    BASEGEOGCRS[
        "TUREF",
        DATUM[
            "Turkish National Reference Frame",
            ELLIPSOID[
                "GRS 1980",
                6378137,
                298.257222101,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7019]
            ],
            ID["EPSG",1057]
        ],
        ID["EPSG",5252]
    ],
    CONVERSION[
        "3-degree Gauss-Kruger zone 10",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            30,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            1,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            10500000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",16270]
    ],
    CS[Cartesian,2,ID["EPSG",4530]],
    AXIS["Northing (X)",north],
    AXIS["Easting (Y)",east],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",5270]
]

+proj=tmerc +lat_0=0 +lon_0=30 +k=1 +x_0=10500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs

proj4.defs("EPSG:5270", "+proj=tmerc +lat_0=0 +lon_0=30 +k=1 +x_0=10500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs");

{
  "type": "CoordinateReferenceSystem",
  "code": 5270,
  "name": "TUREF / 3-degree Gauss-Kruger zone 10",
  "kind": "projected",
  "area": "Turkiye - 28.5°E to 31.5°E onshore",
  "unit": "metre",
  "bbox": [
    36.06,
    28.5,
    41.46,
    31.5
  ],
  "proj4": "+proj=tmerc +lat_0=0 +lon_0=30 +k=1 +x_0=10500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs"
}

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (5270, 'EPSG', 5270, '+proj=tmerc +lat_0=0 +lon_0=30 +k=1 +x_0=10500000 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["TUREF / 3-degree Gauss-Kruger zone 10",GEOGCS["TUREF",DATUM["Turkish_National_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","5252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",30],PARAMETER["scale_factor",1],PARAMETER["false_easting",10500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","5270"]]');

PROJECTION
  "+proj=tmerc"
  "+lat_0=0"
  "+lon_0=30"
  "+k=1"
  "+x_0=10500000"
  "+y_0=0"
  "+ellps=GRS80"
  "+towgs84=0,0,0,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

5270=PROJCS["TUREF / 3-degree Gauss-Kruger zone 10",GEOGCS["TUREF",DATUM["Turkish_National_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101],TOWGS84[0,0,0,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","5252"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",30],PARAMETER["scale_factor",1],PARAMETER["false_easting",10500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AUTHORITY["EPSG","5270"]]