EPSG:4300

TM75

Transform Get position on a map

Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

Selected transformation

Method: Position Vector transformation (geog2D domain)

Remarks: Parameter values taken from TM65 to ETRS89 (2) (code 1953). Assumes ETRS89 and WGS 84 can be considered the same to within the accuracy of the transformation.

Information source: OGP

Revision date: 2023-01-17

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: TM75

Datum: Geodetic Datum of 1965

Ellipsoid: Airy Modified 1849

Prime meridian: Greenwich

Data source: EPSG

Information source: "The Irish Grid - A Description of the Co-ordinate Reference System" published by Ordnance Survey of Ireland, Dublin and Ordnance Survey of Northern Ireland, Belfast.

Revision date: 2004-01-06

Scope: Basis for topographic mapping.

Remarks: Uses Geodetic Datum of 1965 which should not be confused with the 1965 adjustment (TM65, datum code 6299 and CRS code 4299). Replaces OSNI52 (CRS code 4188) and TM65 (CRS code 4299). Replaced by IRENET95 (CRS code 4173).

Area of use: Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
-7.95 53.41

WGS84 bounds:
-10.56 51.39
-5.34 55.43

Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.
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Definition: OGC Well Known Text

GEOGCS["TM75",
    DATUM["Geodetic_Datum_of_1965",
        SPHEROID["Airy Modified 1849",6377340.189,299.3249646],
        TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4300"]]

Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["TM75",
            DATUM["Geodetic Datum of 1965",
                ELLIPSOID["Airy Modified 1849",6377340.189,299.3249646,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Basis for topographic mapping."],
                AREA["Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore."],
                BBOX[51.39,-10.56,55.43,-5.34]],
            ID["EPSG",4300]]],
    TARGETCRS[
        GEOGCRS["WGS 84",
            ENSEMBLE["World Geodetic System 1984 ensemble",
                MEMBER["World Geodetic System 1984 (Transit)"],
                MEMBER["World Geodetic System 1984 (G730)"],
                MEMBER["World Geodetic System 1984 (G873)"],
                MEMBER["World Geodetic System 1984 (G1150)"],
                MEMBER["World Geodetic System 1984 (G1674)"],
                MEMBER["World Geodetic System 1984 (G1762)"],
                MEMBER["World Geodetic System 1984 (G2139)"],
                ELLIPSOID["WGS 84",6378137,298.257223563,
                    LENGTHUNIT["metre",1]],
                ENSEMBLEACCURACY[2.0]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            USAGE[
                SCOPE["Horizontal component of 3D system."],
                AREA["World."],
                BBOX[-90,-180,90,180]],
            ID["EPSG",4326]]],
    ABRIDGEDTRANSFORMATION["Transformation from unknown to WGS84",
        METHOD["Position Vector transformation (geog2D domain)",
            ID["EPSG",9606]],
        PARAMETER["X-axis translation",482.5,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",-130.6,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",564.6,
            ID["EPSG",8607]],
        PARAMETER["X-axis rotation",-1.042,
            ID["EPSG",8608]],
        PARAMETER["Y-axis rotation",-0.214,
            ID["EPSG",8609]],
        PARAMETER["Z-axis rotation",-0.631,
            ID["EPSG",8610]],
        PARAMETER["Scale difference",1.00000815,
            ID["EPSG",8611]]]]

Definition: ESRI Well Known Text

GEOGCS["GCS_TM75",
    DATUM["D_TM75",
        SPHEROID["Airy_Modified",6377340.189,299.3249646]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +a=6377340.189 +rf=299.3249646 +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4300","+proj=longlat +a=6377340.189 +rf=299.3249646 +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "TM75",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Geodetic Datum of 1965",
            "ellipsoid": {
                "name": "Airy Modified 1849",
                "semi_major_axis": 6377340.189,
                "inverse_flattening": 299.3249646
            }
        },
        "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": 4300
        }
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "WGS 84",
        "datum_ensemble": {
            "name": "World Geodetic System 1984 ensemble",
            "members": [
                {
                    "name": "World Geodetic System 1984 (Transit)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1166
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G730)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1152
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G873)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1153
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1150)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1154
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1674)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1155
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G1762)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1156
                    }
                },
                {
                    "name": "World Geodetic System 1984 (G2139)",
                    "id": {
                        "authority": "EPSG",
                        "code": 1309
                    }
                }
            ],
            "ellipsoid": {
                "name": "WGS 84",
                "semi_major_axis": 6378137,
                "inverse_flattening": 298.257223563
            },
            "accuracy": "2.0",
            "id": {
                "authority": "EPSG",
                "code": 6326
            }
        },
        "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": 4326
        }
    },
    "transformation": {
        "name": "Transformation from unknown to WGS84",
        "method": {
            "name": "Position Vector transformation (geog2D domain)",
            "id": {
                "authority": "EPSG",
                "code": 9606
            }
        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": 482.5,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8605
                }
            },
            {
                "name": "Y-axis translation",
                "value": -130.6,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8606
                }
            },
            {
                "name": "Z-axis translation",
                "value": 564.6,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            },
            {
                "name": "X-axis rotation",
                "value": -1.042,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8608
                }
            },
            {
                "name": "Y-axis rotation",
                "value": -0.214,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8609
                }
            },
            {
                "name": "Z-axis rotation",
                "value": -0.631,
                "unit": {
                    "type": "AngularUnit",
                    "name": "arc-second",
                    "conversion_factor": 4.84813681109536e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8610
                }
            },
            {
                "name": "Scale difference",
                "value": 8.15,
                "unit": {
                    "type": "ScaleUnit",
                    "name": "parts per million",
                    "conversion_factor": 1e-06
                },
                "id": {
                    "authority": "EPSG",
                    "code": 8611
                }
            }
        ]
    }
}

Definition: GeoServer

4300=GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"a=6377340.189"
	"rf=299.3249646"
	"towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +a=6377340.189 +rf=299.3249646 +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs +type=crs">
	<Layer srs="+proj=longlat +a=6377340.189 +rf=299.3249646 +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs +type=crs">
	</Layer>
</Map>

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4300, 'EPSG', 4300, '+proj=longlat +a=6377340.189 +rf=299.3249646 +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs +type=crs', 'GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]');