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            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
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Le trait de côte est extrait de l’image satellite filtrée pour mettre en évidence les ruptures de texture. Le trait de côte est ensuite revu à dire d’expert afin d’éliminer du shape des points aberrants. Le contour produit est validé par des vérités terrain réalisées par l'Observatoire de la Côte Aquitaine (DGPS) ou GEO-Transfert (GPS Trimble GEOXT). La précision planimétrique du trait de côte par cette méthode et avec ces données est estimée à +/- 10 m</gco:CharacterString>
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