Definition: OGP XML
<div class="syntax"><pre><span class="cp"><?xml version="1.0" encoding="UTF-8"?></span>
<span class="nt"><gml:VerticalDatum</span> <span class="na">xmlns:epsg=</span><span class="s">"urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset"</span> <span class="na">xmlns:gml=</span><span class="s">"http://www.opengis.net/gml/3.2"</span> <span class="na">xmlns:xlink=</span><span class="s">"http://www.w3.org/1999/xlink"</span> <span class="na">gml:id=</span><span class="s">"ogp-datum-5120"</span><span class="nt">></span>
<span class="nt"><gml:metaDataProperty></span>
<span class="nt"><epsg:CommonMetaData></span>
<span class="nt"><epsg:type></span>vertical<span class="nt"></epsg:type></span>
<span class="nt"><epsg:alias</span> <span class="na">alias=</span><span class="s">"NGF-IGN78"</span> <span class="na">code=</span><span class="s">"261"</span> <span class="na">codeSpace=</span><span class="s">"urn:ogc:def:naming-system:EPSG::7302"</span> <span class="nt">/></span>
<span class="nt"><epsg:alias</span> <span class="na">alias=</span><span class="s">"IGN78"</span> <span class="na">code=</span><span class="s">"1302"</span> <span class="na">codeSpace=</span><span class="s">"urn:ogc:def:naming-system:EPSG::7301"</span> <span class="nt">/></span>
<span class="nt"><epsg:alias</span> <span class="na">alias=</span><span class="s">"Nivellement general de la France"</span> <span class="na">code=</span><span class="s">"1304"</span> <span class="na">codeSpace=</span><span class="s">"urn:ogc:def:naming-system:EPSG::7301"</span><span class="nt">></span>
<span class="nt"><epsg:remarks></span>This alias is also used for other datum realisations: see NGF - Lallemand (code 5118) and NGF - IGN69 (code 5119).<span class="nt"></epsg:remarks></span>
<span class="nt"></epsg:alias></span>
<span class="nt"><epsg:informationSource></span>Conseil National de l'Information Geographique groupe de travail "Reseaux de Nivellement" recommendations v5.1 April 1994.<span class="nt"></epsg:informationSource></span>
<span class="nt"><epsg:revisionDate></span>2012-01-21<span class="nt"></epsg:revisionDate></span>
<span class="nt"><epsg:changes></span>
<span class="nt"><epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:change-request:EPSG::2001.470"</span> <span class="nt">/></span>
<span class="nt"><epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:change-request:EPSG::2004.060"</span> <span class="nt">/></span>
<span class="nt"><epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:change-request:EPSG::2004.564"</span> <span class="nt">/></span>
<span class="nt"><epsg:changeID</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:change-request:EPSG::2012.010"</span> <span class="nt">/></span>
<span class="nt"></epsg:changes></span>
<span class="nt"><epsg:show></span>true<span class="nt"></epsg:show></span>
<span class="nt"><epsg:isDeprecated></span>false<span class="nt"></epsg:isDeprecated></span>
<span class="nt"></epsg:CommonMetaData></span>
<span class="nt"></gml:metaDataProperty></span>
<span class="nt"><gml:identifier</span> <span class="na">codeSpace=</span><span class="s">"OGP"</span><span class="nt">></span>urn:ogc:def:datum:EPSG::5120<span class="nt"></gml:identifier></span>
<span class="nt"><gml:name></span>Nivellement General de la France - IGN78<span class="nt"></gml:name></span>
<span class="nt"><gml:remarks></span>Uses Normal heights. Replaces NGC (datum code 5189).<span class="nt"></gml:remarks></span>
<span class="nt"><gml:domainOfValidity</span> <span class="na">xlink:href=</span><span class="s">"urn:ogc:def:area:EPSG::1327"</span> <span class="nt">/></span>
<span class="nt"><gml:scope></span>Geodetic survey, topographic mapping, engineering survey.<span class="nt"></gml:scope></span>
<span class="nt"><gml:anchorDefinition></span>Marker MM3 situated on the tide gauge site of Ajaccio. Height is 3.640 metre above mean sea level.<span class="nt"></gml:anchorDefinition></span>
<span class="nt"><gml:realizationEpoch></span>1978-01-01<span class="nt"></gml:realizationEpoch></span>
<span class="nt"></gml:VerticalDatum></span>
</pre></div>
<?xml version="1.0" encoding="UTF-8"?>
<gml:VerticalDatum 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="ogp-datum-5120">
<gml:metaDataProperty>
<epsg:CommonMetaData>
<epsg:type>vertical</epsg:type>
<epsg:alias alias="NGF-IGN78" code="261" codeSpace="urn:ogc:def:naming-system:EPSG::7302" />
<epsg:alias alias="IGN78" code="1302" codeSpace="urn:ogc:def:naming-system:EPSG::7301" />
<epsg:alias alias="Nivellement general de la France" code="1304" codeSpace="urn:ogc:def:naming-system:EPSG::7301">
<epsg:remarks>This alias is also used for other datum realisations: see NGF - Lallemand (code 5118) and NGF - IGN69 (code 5119).</epsg:remarks>
</epsg:alias>
<epsg:informationSource>Conseil National de l'Information Geographique groupe de travail "Reseaux de Nivellement" recommendations v5.1 April 1994.</epsg:informationSource>
<epsg:revisionDate>2012-01-21</epsg:revisionDate>
<epsg:changes>
<epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2001.470" />
<epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2004.060" />
<epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2004.564" />
<epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2012.010" />
</epsg:changes>
<epsg:show>true</epsg:show>
<epsg:isDeprecated>false</epsg:isDeprecated>
</epsg:CommonMetaData>
</gml:metaDataProperty>
<gml:identifier codeSpace="OGP">urn:ogc:def:datum:EPSG::5120</gml:identifier>
<gml:name>Nivellement General de la France - IGN78</gml:name>
<gml:remarks>Uses Normal heights. Replaces NGC (datum code 5189).</gml:remarks>
<gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1327" />
<gml:scope>Geodetic survey, topographic mapping, engineering survey.</gml:scope>
<gml:anchorDefinition>Marker MM3 situated on the tide gauge site of Ajaccio. Height is 3.640 metre above mean sea level.</gml:anchorDefinition>
<gml:realizationEpoch>1978-01-01</gml:realizationEpoch>
</gml:VerticalDatum>