EPSG:11468

SZCTW-TM

Attributes

Data source: EPSG

Information source: Severn Partnership on behalf of Civil Works Alliance / AtkinsRealis.

Revision date: 2026-05-19

Scope: Engineering survey, GIS, topographic mapping.

Remarks: In conjunction with transformation ETRS89-GBR [OSNet v2009] to SZCTW-IRF (1) (code 11467), emulates the SZCTW Snake projection.

Method: Transverse Mercator

Area of use: United Kingdom (UK) - Sizewell power station site and rail and road routes related to the site.

Description: (0,)

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United Kingdom (UK) - Sizewell power station site and rail and road routes related to the site.

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Definition: OGC Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",52.25],
PARAMETER["central_meridian",1.55],
PARAMETER["scale_factor",1],
PARAMETER["false_easting",77194.7386],
PARAMETER["false_northing",49269.7375]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["SZCTW-TM",
    METHOD["Transverse Mercator",
        ID["EPSG",9807]],
    PARAMETER["Latitude of natural origin",52.25,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",1.55,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",1,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",77194.7386,
        LENGTHUNIT["metre",1],
        ID["EPSG",8806]],
    PARAMETER["False northing",49269.7375,
        LENGTHUNIT["metre",1],
        ID["EPSG",8807]],
    ID["EPSG",11468]]

Definition: ESRI Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",77194.7386],
PARAMETER["False_Northing",49269.7375],
PARAMETER["Central_Meridian",1.55],
PARAMETER["Scale_Factor",1.0],
PARAMETER["Latitude_Of_Origin",52.25]

Definition: PROJ.4

+proj=tmerc +lat_0=52.25 +lon_0=1.55 +k=1 +x_0=77194.7386 +y_0=49269.7375

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:11468","+proj=tmerc +lat_0=52.25 +lon_0=1.55 +k=1 +x_0=77194.7386 +y_0=49269.7375");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "SZCTW-TM",
    "method": {
        "name": "Transverse Mercator",
        "id": {
            "authority": "EPSG",
            "code": 9807
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 52.25,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": 1.55,
            "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": 77194.7386,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 49269.7375,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 11468
    }
}

Definition: GeoServer

11468=PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",52.25],PARAMETER["central_meridian",1.55],PARAMETER["scale_factor",1],PARAMETER["false_easting",77194.7386],PARAMETER["false_northing",49269.7375]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=52.25"
	"lon_0=1.55"
	"k=1"
	"x_0=77194.7386"
	"y_0=49269.7375"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=52.25 +lon_0=1.55 +k=1 +x_0=77194.7386 +y_0=49269.7375">
	<Layer srs="+proj=tmerc +lat_0=52.25 +lon_0=1.55 +k=1 +x_0=77194.7386 +y_0=49269.7375">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 11468, 'EPSG', 11468, '+proj=tmerc +lat_0=52.25 +lon_0=1.55 +k=1 +x_0=77194.7386 +y_0=49269.7375', 'PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",52.25],PARAMETER["central_meridian",1.55],PARAMETER["scale_factor",1],PARAMETER["false_easting",77194.7386],PARAMETER["false_northing",49269.7375]');