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Le fichier obstacles.zip contient les couches géographiques (vecteur) suivantes : 
- CER_OBSTACLES_P_44.shp : obstacles à l'écoulement des eaux en cours d'eau, issus du référentiel ROE de l'OFB ;
- CER_OBSTACLES_S_44.shp : hiérarchisation des points de conflits entre les continuités écologiques et les infrastructures linéaires de transport (réseau routier et ferré).

Le répertoire temp_obstacles_qml.zip contient les fichiers de styles (format QML - QGis) :
- CER_OBSTACLES_S_44_style.qml : couche de style associée à la couche CER_OBSTACLES_S_44.shp.

Le dossier note_methodo.zip contient une note méthodologique sur la manière dont les données ont été constituées ainsi que la description des champs de chacune des données.</gco:CharacterString>
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            <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:report>
        <gmd:DQ_DomainConsistency>
          <gmd:result>
            <gmd:DQ_ConformanceResult>
              <gmd:specification>
                <gmd:CI_Citation>
                  <gmd:title>
                    <gco:CharacterString>CNIG</gco:CharacterString>
                  </gmd:title>
                  <gmd:date>
                    <gmd:CI_Date>
                      <gmd:dateType>
                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/codelist/ML_gmxCodelists.xml#CI_DateTypeCode" />
                      </gmd:dateType>
                    </gmd:CI_Date>
                  </gmd:date>
                </gmd:CI_Citation>
              </gmd:specification>
            </gmd:DQ_ConformanceResult>
          </gmd:result>
        </gmd:DQ_DomainConsistency>
      </gmd:report>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement>
            <gco:CharacterString>Les obstacles liés aux ILT ont été hiérarchisés sur la base d'un système de notation prenant en compte différents critères : 
- nature et importance des infrastructures ;
- présence d'ouvrages d'art permettant la traversée de l'ILT (sur la base de la bibliographie et de complément de photo-interprétation ; aucune vérification de terrain n'a été effectuée). 
- nombre de guildes d'espèces concernées par le tronçon;
- présence d'un réservoir de biodiversité ;
- présence d'un écopont, tunnel ou viaduc dans un rayon de 250m. 

Les obstacles à la sous-trame aquatique se basent sur le Référentiel des Obstacles à l’Écoulement (ROE), donnée produite par l’OFB. Il s’agit des ouvrages liés à l’eau qui sont à l’origine d’une modification de l’écoulement des eaux de surface, dans les lits mineurs et majeurs des cours d’eau.</gco:CharacterString>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>

