EPSG:4300 — TM75

Geographic 2D · Europe - Ireland (Republic and Ulster) - onshore

Export Formats

OGC WKT

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"]
]

WKT2

GEOGCRS[
    "TM75",
    DATUM[
        "Geodetic Datum of 1965",
        ELLIPSOID[
            "Airy Modified 1849",
            6377340.189,
            299.3249646,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7002]
        ],
        ID["EPSG",6300]
    ],
    CS[ellipsoidal,2,ID["EPSG",6422]],
    AXIS["Geodetic latitude (Lat)",north],
    AXIS["Geodetic longitude (Lon)",east],
    ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
    ID["EPSG",4300]
]

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

Proj4js

How to add a projection to 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");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4300,
  "name": "TM75",
  "kind": "geographic 2D",
  "area": "Europe - Ireland (Republic and Ulster) - onshore",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    51.39,
    -10.56,
    55.43,
    -5.34
  ],
  "proj4": "+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"
}

PostGIS

How to add a projection to 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"]]');

MapServer

How to add a projection to MapServer? →

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

GeoServer

How to add a projection to 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"]]

Related Coordinate Systems

Available Transformations (7)

Transformation	Source → Target	Accuracy (m)
TM75 to ETRS89 (1)	4300 → 4258	0.4
TM75 to ETRS89 (3)	4300 → 4258	0.41
TM75 to WGS 84 (1)	4300 → 4326	1
TM75 to ETRS89 (2)	4300 → 4258	1
TM75 to WGS 84 (2)	4300 → 4326	1
TM75 to WGS 84 (4)	4300 → 4326	1
TM75 to WGS 84 (3)	4300 → 4326	6

Other CRS using Geodetic Datum of 1965

Frequently Asked Questions

How do I add EPSG:4300 to GeoServer?

Add the following definition to your GeoServer configuration:

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"]]

Read the full GeoServer guide →

How do I add EPSG:4300 to PostGIS?

Add the following definition to your PostGIS configuration:

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"]]');

Read the full PostGIS guide →

How do I add EPSG:4300 to MapServer?

Add the following definition to your MapServer configuration:

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

Read the full MapServer guide →

How do I use EPSG:4300 with Proj4js?

Add the following definition to your Proj4js configuration:

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");

Read the full Proj4js guide →

Type

Geographic 2D

Unit

degree (supplier to define representation)

Datum

Geodetic Datum of 1965

Ellipsoid

Airy Modified 1849

Prime Meridian

Greenwich

Area of Use

Europe - Ireland (Republic and Ulster) - onshore

Ireland - onshore. United Kingdom (UK) - Northern Ireland (Ulster) - onshore.

Coordinate System

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

Center Coordinates

-7.95 53.41

Projected Bounds

55.43 -10.56-5.34 51.39

WGS84 Bounds

55.43 -10.56-5.34 51.39

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).

EPSG

4300