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EPSG:4300

Geodetic coordinate system

TM75

Covered area

Center coordinates
-7.94925563 53.40977700

WGS84 bounds:
-10.56 51.39
-5.34 55.43

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

Available transformations:

Selected transformation

Ireland

code 1954

Accuracy 1.0 m (default)
7 parameters

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: 2003-06-27

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: TM75

Datum: Geodetic Datum of 1965

Ellipsoid: Airy Modified 1849

Prime meridian: Greenwich

Data source: OGP

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).

Method: Position Vector transformation (geog2D domain)

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

Definition: Well Known Text (WKT)

GEOGCS["TM75",
    DATUM["Geodetic_Datum_of_1965",
        SPHEROID["Airy Modified 1849",6377340.189,299.3249646,
            AUTHORITY["EPSG","7002"]],
        TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],
        AUTHORITY["EPSG","6300"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4300"]]

GEOGCS["TM75",
    DATUM["Geodetic_Datum_of_1965",
        SPHEROID["Airy Modified 1849",6377340.189,299.3249646,
            AUTHORITY["EPSG","7002"]],
        TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],
        AUTHORITY["EPSG","6300"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4300"]]

Definition: ESRI WKT

GEOGCS["TM75",DATUM["D_TM75",SPHEROID["Airy_Modified_1849",6377340.189,299.3249646]],PRIMEM["Greenwich",0],UNIT["Degree",0.017453292519943295]]

Definition: PROJ.4

+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4300","+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs");

Definition: OGC GML

<?xml version="1.0" encoding="UTF-8"?>
 <gml:GeodeticCRS xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="epsg-crs-4300">
   <gml:metaDataProperty>
      <epsg:CommonMetaData>
         <epsg:type>geographic 2D</epsg:type>
         <epsg:alias alias="1975 Mapping Adjustment" code="1308" codeSpace="urn:ogc:def:naming-system:EPSG::7301" />
         <epsg:informationSource>"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.</epsg:informationSource>
         <epsg:revisionDate>2004-01-06</epsg:revisionDate>
         <epsg:changes>
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2002.621" />
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2003.370" />
         </epsg:changes>
         <epsg:show>true</epsg:show>
         <epsg:isDeprecated>false</epsg:isDeprecated>
      </epsg:CommonMetaData>
   </gml:metaDataProperty>
   <gml:identifier codeSpace="OGP">urn:ogc:def:crs:EPSG::4300</gml:identifier>
   <gml:name>TM75</gml:name>
   <gml: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).</gml:remarks>
   <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1305" />
   <gml:scope>Basis for topographic mapping.</gml:scope>
   <gml:ellipsoidalCS xlink:href="urn:ogc:def:cs:EPSG::6422" />
   <gml:geodeticDatum xlink:href="urn:ogc:def:datum:EPSG::6300" />
</gml:GeodeticCRS>

<?xml version="1.0" encoding="UTF-8"?>
 <gml:GeodeticCRS xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset" xmlns:gml="http://www.opengis.net/gml/3.2" xmlns:xlink="http://www.w3.org/1999/xlink" gml:id="epsg-crs-4300">
   <gml:metaDataProperty>
      <epsg:CommonMetaData>
         <epsg:type>geographic 2D</epsg:type>
         <epsg:alias alias="1975 Mapping Adjustment" code="1308" codeSpace="urn:ogc:def:naming-system:EPSG::7301" />
         <epsg:informationSource>"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.</epsg:informationSource>
         <epsg:revisionDate>2004-01-06</epsg:revisionDate>
         <epsg:changes>
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2002.621" />
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2003.370" />
         </epsg:changes>
         <epsg:show>true</epsg:show>
         <epsg:isDeprecated>false</epsg:isDeprecated>
      </epsg:CommonMetaData>
   </gml:metaDataProperty>
   <gml:identifier codeSpace="OGP">urn:ogc:def:crs:EPSG::4300</gml:identifier>
   <gml:name>TM75</gml:name>
   <gml: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).</gml:remarks>
   <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1305" />
   <gml:scope>Basis for topographic mapping.</gml:scope>
   <gml:ellipsoidalCS xlink:href="urn:ogc:def:cs:EPSG::6422" />
   <gml:geodeticDatum xlink:href="urn:ogc:def:datum:EPSG::6300" />
</gml:GeodeticCRS>

Definition: XML

<?xml version="1.0" encoding="UTF-8"?>
 <gml:GeographicCRS gml:id="ogrcrs9550" xmlns:gml="http://www.opengis.net/gml/3.2">
  <gml:srsName>TM75</gml:srsName>
  <gml:srsID>
    <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">4300</gml:name>
  </gml:srsID>
  <gml:usesEllipsoidalCS>
    <gml:EllipsoidalCS gml:id="ogrcrs9551">
      <gml:csName>ellipsoidal</gml:csName>
      <gml:csID>
        <gml:name gml:codeSpace="urn:ogc:def:cs:EPSG::">6402</gml:name>
      </gml:csID>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs9552" gml:uom="urn:ogc:def:uom:EPSG::9102">
          <gml:name>Geodetic latitude</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9901</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>Lat</gml:axisAbbrev>
          <gml:axisDirection>north</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs9553" gml:uom="urn:ogc:def:uom:EPSG::9102">
          <gml:name>Geodetic longitude</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9902</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>Lon</gml:axisAbbrev>
          <gml:axisDirection>east</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
    </gml:EllipsoidalCS>
  </gml:usesEllipsoidalCS>
  <gml:usesGeodeticDatum>
    <gml:GeodeticDatum gml:id="ogrcrs9554">
      <gml:datumName>Geodetic_Datum_of_1965</gml:datumName>
      <gml:datumID>
        <gml:name gml:codeSpace="urn:ogc:def:datum:EPSG::">6300</gml:name>
      </gml:datumID>
      <gml:usesPrimeMeridian>
        <gml:PrimeMeridian gml:id="ogrcrs9555">
          <gml:meridianName>Greenwich</gml:meridianName>
          <gml:meridianID>
            <gml:name gml:codeSpace="urn:ogc:def:meridian:EPSG::">8901</gml:name>
          </gml:meridianID>
          <gml:greenwichLongitude>
            <gml:angle gml:uom="urn:ogc:def:uom:EPSG::9102">0</gml:angle>
          </gml:greenwichLongitude>
        </gml:PrimeMeridian>
      </gml:usesPrimeMeridian>
      <gml:usesEllipsoid>
        <gml:Ellipsoid gml:id="ogrcrs9556">
          <gml:ellipsoidName>Airy Modified 1849</gml:ellipsoidName>
          <gml:ellipsoidID>
            <gml:name gml:codeSpace="urn:ogc:def:ellipsoid:EPSG::">7002</gml:name>
          </gml:ellipsoidID>
          <gml:semiMajorAxis gml:uom="urn:ogc:def:uom:EPSG::9001">6377340.189</gml:semiMajorAxis>
          <gml:secondDefiningParameter>
            <gml:inverseFlattening gml:uom="urn:ogc:def:uom:EPSG::9201">299.3249646</gml:inverseFlattening>
          </gml:secondDefiningParameter>
        </gml:Ellipsoid>
      </gml:usesEllipsoid>
    </gml:GeodeticDatum>
  </gml:usesGeodeticDatum>
</gml:GeographicCRS>

<?xml version="1.0" encoding="UTF-8"?>
 <gml:GeographicCRS gml:id="ogrcrs9550" xmlns:gml="http://www.opengis.net/gml/3.2">
  <gml:srsName>TM75</gml:srsName>
  <gml:srsID>
    <gml:name gml:codeSpace="urn:ogc:def:crs:EPSG::">4300</gml:name>
  </gml:srsID>
  <gml:usesEllipsoidalCS>
    <gml:EllipsoidalCS gml:id="ogrcrs9551">
      <gml:csName>ellipsoidal</gml:csName>
      <gml:csID>
        <gml:name gml:codeSpace="urn:ogc:def:cs:EPSG::">6402</gml:name>
      </gml:csID>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs9552" gml:uom="urn:ogc:def:uom:EPSG::9102">
          <gml:name>Geodetic latitude</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9901</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>Lat</gml:axisAbbrev>
          <gml:axisDirection>north</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
      <gml:usesAxis>
        <gml:CoordinateSystemAxis gml:id="ogrcrs9553" gml:uom="urn:ogc:def:uom:EPSG::9102">
          <gml:name>Geodetic longitude</gml:name>
          <gml:axisID>
            <gml:name gml:codeSpace="urn:ogc:def:axis:EPSG::">9902</gml:name>
          </gml:axisID>
          <gml:axisAbbrev>Lon</gml:axisAbbrev>
          <gml:axisDirection>east</gml:axisDirection>
        </gml:CoordinateSystemAxis>
      </gml:usesAxis>
    </gml:EllipsoidalCS>
  </gml:usesEllipsoidalCS>
  <gml:usesGeodeticDatum>
    <gml:GeodeticDatum gml:id="ogrcrs9554">
      <gml:datumName>Geodetic_Datum_of_1965</gml:datumName>
      <gml:datumID>
        <gml:name gml:codeSpace="urn:ogc:def:datum:EPSG::">6300</gml:name>
      </gml:datumID>
      <gml:usesPrimeMeridian>
        <gml:PrimeMeridian gml:id="ogrcrs9555">
          <gml:meridianName>Greenwich</gml:meridianName>
          <gml:meridianID>
            <gml:name gml:codeSpace="urn:ogc:def:meridian:EPSG::">8901</gml:name>
          </gml:meridianID>
          <gml:greenwichLongitude>
            <gml:angle gml:uom="urn:ogc:def:uom:EPSG::9102">0</gml:angle>
          </gml:greenwichLongitude>
        </gml:PrimeMeridian>
      </gml:usesPrimeMeridian>
      <gml:usesEllipsoid>
        <gml:Ellipsoid gml:id="ogrcrs9556">
          <gml:ellipsoidName>Airy Modified 1849</gml:ellipsoidName>
          <gml:ellipsoidID>
            <gml:name gml:codeSpace="urn:ogc:def:ellipsoid:EPSG::">7002</gml:name>
          </gml:ellipsoidID>
          <gml:semiMajorAxis gml:uom="urn:ogc:def:uom:EPSG::9001">6377340.189</gml:semiMajorAxis>
          <gml:secondDefiningParameter>
            <gml:inverseFlattening gml:uom="urn:ogc:def:uom:EPSG::9201">299.3249646</gml:inverseFlattening>
          </gml:secondDefiningParameter>
        </gml:Ellipsoid>
      </gml:usesEllipsoid>
    </gml:GeodeticDatum>
  </gml:usesGeodeticDatum>
</gml:GeographicCRS>

Definition: GeoServer

4300=GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646,AUTHORITY["EPSG","7002"]],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],AUTHORITY["EPSG","6300"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=mod_airy"
	"towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15"
	"no_defs"
END

Definition: MapServer - Python

wkt = '''GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646,AUTHORITY["EPSG","7002"]],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],AUTHORITY["EPSG","6300"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]'''
m = mapObj('')
m.setWKTProjection(ref.ExportToWkt())
lyr = layerObj(m)
lyr.setWKTProjection(ref.ExportToWkt())

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs">
	<Layer srs="+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs">
	</Layer>
</Map>

Definition: Mapnik - Python

proj4 = '+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs'
m = Map(256,256,proj4)
lyr = Layer('Name',proj4)

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4300, 'EPSG', 4300, '+proj=longlat +ellps=mod_airy +towgs84=482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15 +no_defs ', 'GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646,AUTHORITY["EPSG","7002"]],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],AUTHORITY["EPSG","6300"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]');

Definition: OGC WKT

GEOGCS["TM75",DATUM["Geodetic_Datum_of_1965",SPHEROID["Airy Modified 1849",6377340.189,299.3249646,AUTHORITY["EPSG","7002"]],TOWGS84[482.5,-130.6,564.6,-1.042,-0.214,-0.631,8.15],AUTHORITY["EPSG","6300"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4300"]]