Unit: metre
Geodetic CRS: St. Helena Tritan
Datum: St. Helena Tritan
Ellipsoid: WGS 84
Prime meridian: Greenwich
Data source: OGP
Information source: St. Helena Government, Environment and Natural Resources Directorate (ENRD).
Revision date: 2016-11-20
Scope: Engineering surveys including Airport and Ruperts Wharf construction.
Remarks: Closely aligned to SHGD2015 (CRS code 7885) with difference attributable to different reference epoch and 10 cm difference in ellipsoid height. Replaced by SHGD2015 from 2015.
Area of use: St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore.
Coordinate system: Ellipsoidal 3D CS. Axes: latitude, longitude, ellipsoidal height. Orientations: north, east, up. UoM: degree, degree, metre.
Definition: OGP XML
<?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="iogp-crs-7880"> <gml:metaDataProperty> <epsg:CommonMetaData> <epsg:type>geographic 3D</epsg:type> <epsg:alias alias="WGS 84 Tritan St. Helena" code="7203" codeSpace="urn:ogc:def:naming-system:EPSG::7301" /> <epsg:informationSource>St. Helena Government, Environment and Natural Resources Directorate (ENRD).</epsg:informationSource> <epsg:revisionDate>2016-11-20</epsg:revisionDate> <epsg:changes> <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2016.038" /> </epsg:changes> <epsg:show>true</epsg:show> <epsg:isDeprecated>false</epsg:isDeprecated> </epsg:CommonMetaData> </gml:metaDataProperty> <gml:metaDataProperty> <epsg:CRSMetaData> <epsg:projectionConversion xlink:href="urn:ogc:def:coordinateOperation:EPSG::15592" /> <epsg:sourceGeographicCRS xlink:href="urn:ogc:def:crs:EPSG::7879" /> </epsg:CRSMetaData> </gml:metaDataProperty> <gml:identifier codeSpace="IOGP">urn:ogc:def:crs:EPSG::7880</gml:identifier> <gml:name>St. Helena Tritan</gml:name> <gml:remarks>Closely aligned to SHGD2015 (CRS code 7885) with difference attributable to different reference epoch and 10 cm difference in ellipsoid height. Replaced by SHGD2015 from 2015.</gml:remarks> <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::3183" /> <gml:scope>Engineering surveys including Airport and Ruperts Wharf construction.</gml:scope> <gml:ellipsoidalCS xlink:href="urn:ogc:def:cs:EPSG::6423" /> <gml:geodeticDatum xlink:href="urn:ogc:def:datum:EPSG::1173" /> </gml:GeodeticCRS>