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            <gco:CharacterString>L'indicateur national de l'érosion côtière présente, au 1 / 100 000, la mobilité passée du trait de côte en métropole et dans les départements d'outre-mer. Il dévoile un premier aperçu national des phénomènes d’érosion sur une période de plusieurs dizaines d’années. Il comble ainsi l’absence d’informations disponibles sur certaines parties du littoral français et vient compléter les études locales existantes en proposant une échelle d’analyse plus globale et un éclairage national. Cet indicateur national est basé sur les taux de l'évolution passée du trait de côte, observée sur orthophotographies entre deux dates éloignées de plusieurs décennies. Il représente des tendances d'évolution pluriannuelles entre deux dates qui ne rendent pas nécessairement compte des dynamiques d’évolution au sein même de la période observée, ni des potentiels changements récents de dynamique. L'indicateur n'est pas calculé lorsqu'un ouvrage se substitue au trait de côte naturel ; il ne remonte pas dans les estuaires et ne couvre généralement pas les extrémités des flèches sableuses. Cette version technique est basée sur une modification de la représentation de l’indicateur national sous la forme d’histogrammes le long du linéaire côtier.</gco:CharacterString>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>

