3.2 GML Export
The GML returned by the system is EPSG v2.2, an extension to, GML 3.2.1. The schema definition is available on the EPSG.ORG website. The GML is not fully resolved but includes the API calls to fully resolve the data should the client wish to do so. An example of GML output is seen below where calls to endpoints to further resolve the data has been highlighted.
Example: GML output. Calls to endpoints to further resolve the data are highlighted in yellow.
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<?xml version="1.0" encoding="utf-8"?> <gml:GeodeticCRS xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:2.2:dataset" gml:id="epsg-crs-7915" xmlns:gml="http://www.opengis.net/gml/3.2"> <gml:metaDataProperty> <epsg:CommonMetaData> <epsg:type>geographic 3d</epsg:type> <epsg:alias code="8718" codeSpace="1046" alias="217" /> <epsg:alias code="8719" codeSpace="1047" alias="ETRF89 - LatLonEHt" /> <epsg:informationSource>IAG Subcommision for the European Reference Frame (EUREF, http://etrs89.ensg.ign.fr/) and Boucher and Altamimi "Memo : Specifications for reference frame fixing in the analysis of a EUREF GPS campaign" (http://etrs89.ensg.ign.fr/memo-V8.pdf)</epsg:informationSource> <epsg:revisionDate>2019-07-17</epsg:revisionDate> <epsg:changes> <epsg:changeID xlink:href="https://apps.epsg.org/api/v1/Change/2015.013/export?format=gml" /> <epsg:changeID xlink:href="https://apps.epsg.org/api/v1/Change/2019.038/export?format=gml" /> </epsg:changes> <epsg:show>true</epsg:show> <epsg:isDeprecated>false</epsg:isDeprecated> <epsg:Usage> <epsg:extent xlink:href="https://apps.epsg.org/api/v1/Extent/1298/export?format=gml" /> <gml:scope>Geodesy.</gml:scope> </epsg:Usage> </epsg:CommonMetaData> </gml:metaDataProperty> <gml:metaDataProperty> <epsg:CRSMetaData> <epsg:projectionConversion xlink:href="https://apps.epsg.org/api/v1/Conversion/15592/export?format=gml" /> <epsg:sourceGeographicCRS xlink:href="https://apps.epsg.org/api/v1/CoordRefSystem/7914/export?format=gml" /> </epsg:CRSMetaData> </gml:metaDataProperty> <gml:identifier codeSpace="EPSG">7915</gml:identifier> <gml:name>ETRF89</gml:name> <gml:remarks>Replaced by ETRF90 (code 7917).</gml:remarks> <gml:scope /> <gml:ellipsoidalCS xlink:href="https://apps.epsg.org/api/v1/CoordSystem/6423/export?format=gml" /> <gml:geodeticDatum xlink:href="https://apps.epsg.org/api/v1/Datum/1178/export?format=gml" /> </gml:GeodeticCRS> |
Figure 12 – GML export with links highlighted.
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