EPSG:19998

Guernsey Grid

Attributes

Data source: EPSG

Information source: States of Guernsey and Digimap Ltd, Guernsey.

Revision date: 2004-11-26

Scope: Engineering survey, topographic mapping.

Method: Transverse Mercator

Area of use: Channel Islands - Guernsey, Alderney, Sark, Herm, Brecqhou, Jethou, Lihou - onshore and offshore.

Description: (0,)

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Channel Islands - Guernsey, Alderney, Sark, Herm, Brecqhou, Jethou, Lihou - onshore and offshore.

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Definition: OGC Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["latitude_of_origin",49.5],
PARAMETER["central_meridian",-2.41666666666667],
PARAMETER["scale_factor",0.999997],
PARAMETER["false_easting",47000],
PARAMETER["false_northing",50000]

Definition: OGC Well Known Text 2 (2019)

CONVERSION["Guernsey Grid",
    METHOD["Transverse Mercator",
        ID["EPSG",9807]],
    PARAMETER["Latitude of natural origin",49.5,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8801]],
    PARAMETER["Longitude of natural origin",-2.41666666666667,
        ANGLEUNIT["degree",0.0174532925199433],
        ID["EPSG",8802]],
    PARAMETER["Scale factor at natural origin",0.999997,
        SCALEUNIT["unity",1],
        ID["EPSG",8805]],
    PARAMETER["False easting",47000,
        LENGTHUNIT["metre",1],
        ID["EPSG",8806]],
    PARAMETER["False northing",50000,
        LENGTHUNIT["metre",1],
        ID["EPSG",8807]],
    ID["EPSG",19998]]

Definition: ESRI Well Known Text

PROJECTION["Transverse_Mercator"],
PARAMETER["False_Easting",47000.0],
PARAMETER["False_Northing",50000.0],
PARAMETER["Central_Meridian",-2.41666666666667],
PARAMETER["Scale_Factor",0.999997],
PARAMETER["Latitude_Of_Origin",49.5]

Definition: PROJ.4

+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:19998","+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "Conversion",
    "name": "Guernsey Grid",
    "method": {
        "name": "Transverse Mercator",
        "id": {
            "authority": "EPSG",
            "code": 9807
        }
    },
    "parameters": [
        {
            "name": "Latitude of natural origin",
            "value": 49.5,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8801
            }
        },
        {
            "name": "Longitude of natural origin",
            "value": -2.41666666666667,
            "unit": "degree",
            "id": {
                "authority": "EPSG",
                "code": 8802
            }
        },
        {
            "name": "Scale factor at natural origin",
            "value": 0.999997,
            "unit": "unity",
            "id": {
                "authority": "EPSG",
                "code": 8805
            }
        },
        {
            "name": "False easting",
            "value": 47000,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8806
            }
        },
        {
            "name": "False northing",
            "value": 50000,
            "unit": "metre",
            "id": {
                "authority": "EPSG",
                "code": 8807
            }
        }
    ],
    "id": {
        "authority": "EPSG",
        "code": 19998
    }
}

Definition: GeoServer

19998=PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",49.5],PARAMETER["central_meridian",-2.41666666666667],PARAMETER["scale_factor",0.999997],PARAMETER["false_easting",47000],PARAMETER["false_northing",50000]

Definition: MapServer - MAPfile

PROJECTION
	"proj=tmerc"
	"lat_0=49.5"
	"lon_0=-2.41666666666667"
	"k=0.999997"
	"x_0=47000"
	"y_0=50000"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000">
	<Layer srs="+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 19998, 'EPSG', 19998, '+proj=tmerc +lat_0=49.5 +lon_0=-2.41666666666667 +k=0.999997 +x_0=47000 +y_0=50000', 'PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",49.5],PARAMETER["central_meridian",-2.41666666666667],PARAMETER["scale_factor",0.999997],PARAMETER["false_easting",47000],PARAMETER["false_northing",50000]');