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Un tronçon hydrographique forme l'intersection entre une entité hydrographique et une zone hydrographique, identifiée de façon unique sur le plan national à l'aide d'un code hydrographique. Il peut être découpé en éléments hydrographiques distinguant le sous-milieu, codifié suivant une lettre en 8ème position.

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  <gmd:dataQualityInfo xmlns:gml="http://www.opengis.net/gml">
    <gmd:DQ_DataQuality>
      <gmd:scope>
        <gmd:DQ_Scope>
          <gmd:level>
            <gmd:MD_ScopeCode codeListValue="dataset" codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ScopeCode" />
          </gmd:level>
        </gmd:DQ_Scope>
      </gmd:scope>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement>
            <gco:CharacterString>Mise à jour par l'IGN suite aux demandes des Agences de l'Eau selon un cycle annuel. La version consolidée est ensuite transmise au Sandre</gco:CharacterString>
          </gmd:statement>
          <gmd:processStep>
            <gmd:LI_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Mise à jour à partir de la BD Carthage 2014</gco:CharacterString>
              </gmd:description>
              <gmd:dateTime>
                <gco:DateTime>2014-11-13T00:00:00</gco:DateTime>
              </gmd:dateTime>
            </gmd:LI_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmd:LI_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Mise à jour à partir de la BD Carthage 2013</gco:CharacterString>
              </gmd:description>
              <gmd:dateTime>
                <gco:DateTime>2013-11-07T00:00:00</gco:DateTime>
              </gmd:dateTime>
            </gmd:LI_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmd:LI_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Création couche initiale</gco:CharacterString>
              </gmd:description>
              <gmd:dateTime>
                <gco:DateTime>2012-08-20T15:00:00</gco:DateTime>
              </gmd:dateTime>
            </gmd:LI_ProcessStep>
          </gmd:processStep>
          <gmd:processStep>
            <gmd:LI_ProcessStep>
              <gmd:description>
                <gco:CharacterString>Fusion sur le code_hydrographique de la couche Tronçons Hydrographiques Elementaires de la BD Carthage Métropole 2012</gco:CharacterString>
              </gmd:description>
              <gmd:dateTime>
                <gco:DateTime>2012-08-20T15:00:00</gco:DateTime>
              </gmd:dateTime>
              <gmd:processor>
                <gmd:CI_ResponsibleParty>
                  <gmd:individualName gco:nilReason="missing">
                    <gco:CharacterString />
                  </gmd:individualName>
                  <gmd:organisationName>
                    <gco:CharacterString>SANDRE</gco:CharacterString>
                  </gmd:organisationName>
                  <gmd:positionName gco:nilReason="missing">
                    <gco:CharacterString />
                  </gmd:positionName>
                  <gmd:contactInfo>
                    <gmd:CI_Contact>
                      <gmd:phone>
                        <gmd:CI_Telephone>
                          <gmd:voice>
                            <gco:CharacterString>+33555114790</gco:CharacterString>
                          </gmd:voice>
                          <gmd:facsimile>
                            <gco:CharacterString>+33555114748</gco:CharacterString>
                          </gmd:facsimile>
                        </gmd:CI_Telephone>
                      </gmd:phone>
                      <gmd:address>
                        <gmd:CI_Address>
                          <gmd:deliveryPoint gco:nilReason="missing">
                            <gco:CharacterString />
                          </gmd:deliveryPoint>
                          <gmd:city>
                            <gco:CharacterString>LIMOGES</gco:CharacterString>
                          </gmd:city>
                          <gmd:administrativeArea>
                            <gco:CharacterString>HAUTE-VIENNE</gco:CharacterString>
                          </gmd:administrativeArea>
                          <gmd:postalCode>
                            <gco:CharacterString>87000</gco:CharacterString>
                          </gmd:postalCode>
                          <gmd:country>
                            <gco:CharacterString>France</gco:CharacterString>
                          </gmd:country>
                          <gmd:electronicMailAddress>
                            <gco:CharacterString>sandre@sandre.eaufrance.fr</gco:CharacterString>
                          </gmd:electronicMailAddress>
                        </gmd:CI_Address>
                      </gmd:address>
                    </gmd:CI_Contact>
                  </gmd:contactInfo>
                  <gmd:role>
                    <gmd:CI_RoleCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_RoleCode" codeListValue="processor" />
                  </gmd:role>
                </gmd:CI_ResponsibleParty>
              </gmd:processor>
            </gmd:LI_ProcessStep>
          </gmd:processStep>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>

