GBK19 Grid

Attributes

Unit: metre

Geodetic CRS: GBK19-IRF

Datum: GBK19 Intermediate Reference Frame

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: Network Rail.

Revision date: 2023-01-12

Scope: Engineering survey and topographic mapping for railway applications.

Remarks: The CRS's definition through transformation ETRS89 to GBK19-IRF (1) (code 9454) and map projection GBK19-TM (code 9455) emulates the GBK19 Snake projection applied to ETRS89 as realized through OSNet 2009 CORS.

Area of use: United Kingdom (UK) - on or related to the rail route from Glasgow to Kilmarnock via Barrhead and the branch to East Kilbride.

Coordinate system: Cartesian 2D CS. Axes: easting, northing (E,N). Orientations: east, north. UoM: m.

Covered area powered by MapTiler

Center coordinates
93720.39 113870.49

Projected bounds:
74785.69 91603.4
112655.1 136178.97

WGS84 bounds:
-4.65 55.55
-4.05 55.95

United Kingdom (UK) - on or related to the rail route from Glasgow to Kilmarnock via Barrhead and the branch to East Kilbride.

Definition: OGC Well Known Text

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PROJCS["GBK19 Grid",
    GEOGCS["GBK19-IRF",
        DATUM["GBK19_Intermediate_Reference_Frame",
            SPHEROID["GRS 1980",6378137,298.257222101,
                AUTHORITY["EPSG","7019"]],
            AUTHORITY["EPSG","1289"]],
        PRIMEM["Greenwich",0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,
            AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","9453"]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",55.75],
    PARAMETER["central_meridian",-4.35],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",93720.394],
    PARAMETER["false_northing",113870.493],
    UNIT["metre",1,
        AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","9456"]]

Definition: OGC Well Known Text 2 (2019)

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PROJCRS["GBK19 Grid",
    BASEGEOGCRS["GBK19-IRF",
        DATUM["GBK19 Intermediate Reference Frame",
            ELLIPSOID["GRS 1980",6378137,298.257222101,
                LENGTHUNIT["metre",1]]],
        PRIMEM["Greenwich",0,
            ANGLEUNIT["degree",0.0174532925199433]],
        ID["EPSG",9453]],
    CONVERSION["GBK19-TM",
        METHOD["Transverse Mercator",
            ID["EPSG",9807]],
        PARAMETER["Latitude of natural origin",55.75,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8801]],
        PARAMETER["Longitude of natural origin",-4.35,
            ANGLEUNIT["degree",0.0174532925199433],
            ID["EPSG",8802]],
        PARAMETER["Scale factor at natural origin",1,
            SCALEUNIT["unity",1],
            ID["EPSG",8805]],
        PARAMETER["False easting",93720.394,
            LENGTHUNIT["metre",1],
            ID["EPSG",8806]],
        PARAMETER["False northing",113870.493,
            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 Glasgow to Kilmarnock via Barrhead and the branch to East Kilbride."],
        BBOX[55.55,-4.65,55.95,-4.05]],
    ID["EPSG",9456]]

Definition: ESRI Well Known Text

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PROJCS["GBK19_Grid",
    GEOGCS["GCS_GBK19-IRF",
        DATUM["GBK19_Intermediate_Reference_Frame",
            SPHEROID["GRS_1980",6378137.0,298.257222101]],
        PRIMEM["Greenwich",0.0],
        UNIT["Degree",0.0174532925199433]],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["False_Easting",93720.394],
    PARAMETER["False_Northing",113870.493],
    PARAMETER["Central_Meridian",-4.35],
    PARAMETER["Scale_Factor",1.0],
    PARAMETER["Latitude_Of_Origin",55.75],
    UNIT["Meter",1.0]]

Definition: PROJ.4

+proj=tmerc +lat_0=55.75 +lon_0=-4.35 +k=1 +x_0=93720.394 +y_0=113870.493 +ellps=GRS80 +units=m +no_defs +type=crs

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:9456","+proj=tmerc +lat_0=55.75 +lon_0=-4.35 +k=1 +x_0=93720.394 +y_0=113870.493 +ellps=GRS80 +units=m +no_defs +type=crs");

Definition: JSON

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{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "ProjectedCRS",
    "name": "GBK19 Grid",
    "base_crs": {
        "name": "GBK19-IRF",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "GBK19 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": 9453
        }
    },
    "conversion": {
        "name": "GBK19-TM",
        "method": {
            "name": "Transverse Mercator",
            "id": {
                "authority": "EPSG",
                "code": 9807
            }
        },
        "parameters": [
            {
                "name": "Latitude of natural origin",
                "value": 55.75,
                "unit": "degree",
                "id": {
                    "authority": "EPSG",
                    "code": 8801
                }
            },
            {
                "name": "Longitude of natural origin",
                "value": -4.35,
                "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": 93720.394,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8806
                }
            },
            {
                "name": "False northing",
                "value": 113870.493,
                "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 Glasgow to Kilmarnock via Barrhead and the branch to East Kilbride.",
    "bbox": {
        "south_latitude": 55.55,
        "west_longitude": -4.65,
        "north_latitude": 55.95,
        "east_longitude": -4.05
    },
    "id": {
        "authority": "EPSG",
        "code": 9456
    }
}

Definition: GeoServer

9456=PROJCS["GBK19 Grid",GEOGCS["GBK19-IRF",DATUM["GBK19_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1289"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9453"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",55.75],PARAMETER["central_meridian",-4.35],PARAMETER["scale_factor",1],PARAMETER["false_easting",93720.394],PARAMETER["false_northing",113870.493],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9456"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=55.75"
	"lon_0=-4.35"
	"k=1"
	"x_0=93720.394"
	"y_0=113870.493"
	"ellps=GRS80"
	"units=m"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=55.75 +lon_0=-4.35 +k=1 +x_0=93720.394 +y_0=113870.493 +ellps=GRS80 +units=m +no_defs +type=crs">
	<Layer srs="+proj=tmerc +lat_0=55.75 +lon_0=-4.35 +k=1 +x_0=93720.394 +y_0=113870.493 +ellps=GRS80 +units=m +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 9456, 'EPSG', 9456, '+proj=tmerc +lat_0=55.75 +lon_0=-4.35 +k=1 +x_0=93720.394 +y_0=113870.493 +ellps=GRS80 +units=m +no_defs +type=crs', 'PROJCS["GBK19 Grid",GEOGCS["GBK19-IRF",DATUM["GBK19_Intermediate_Reference_Frame",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","1289"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","9453"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",55.75],PARAMETER["central_meridian",-4.35],PARAMETER["scale_factor",1],PARAMETER["false_easting",93720.394],PARAMETER["false_northing",113870.493],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","9456"]]');

EPSG:9456

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