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         <gmd:spatialResolution>
            <gmd:MD_Resolution>
               <gmd:equivalentScale>
                  <gmd:MD_RepresentativeFraction>
                     <gmd:denominator>
                        <gco:Integer>10000</gco:Integer>
                     </gmd:denominator>
                  </gmd:MD_RepresentativeFraction>
               </gmd:equivalentScale>
            </gmd:MD_Resolution>
         </gmd:spatialResolution>
         <gmd:language>
            <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="fre"/>
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         <gmd:characterSet>
            <gmd:MD_CharacterSetCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_CharacterSetCode"
                                     codeListValue="utf8"/>
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         <gmd:topicCategory>
            <gmd:MD_TopicCategoryCode>environment</gmd:MD_TopicCategoryCode>
         </gmd:topicCategory>
         <gmd:environmentDescription>
            <gco:CharacterString>Les logiciels utilisés pour le traitement et l'analyse de l'image sont  ENVI@RSI 5,0, MATLAB R2012B, Circé et ArcGis 10</gco:CharacterString>
         </gmd:environmentDescription>
         <gmd:extent>
            <gmd:EX_Extent>
               <gmd:description>
                  <gco:CharacterString>AQUITAINE</gco:CharacterString>
               </gmd:description>
               <gmd:geographicElement>
                  <gmd:EX_GeographicDescription>
                     <gmd:geographicIdentifier>
                        <gmd:MD_Identifier>
                           <gmd:code>
                              <gco:CharacterString>http://pigma.org/BATHYSWELLOPT_LITTORAL_AQUITAIN_EPOC</gco:CharacterString>
                           </gmd:code>
                        </gmd:MD_Identifier>
                     </gmd:geographicIdentifier>
                  </gmd:EX_GeographicDescription>
               </gmd:geographicElement>
               <gmd:geographicElement>
                  <gmd:EX_GeographicBoundingBox>
                     <gmd:westBoundLongitude>
                        <gco:Decimal>-1.60673828125</gco:Decimal>
                     </gmd:westBoundLongitude>
                     <gmd:eastBoundLongitude>
                        <gco:Decimal>-0.90361328125</gco:Decimal>
                     </gmd:eastBoundLongitude>
                     <gmd:southBoundLatitude>
                        <gco:Decimal>43.567627020180005</gco:Decimal>
                     </gmd:southBoundLatitude>
                     <gmd:northBoundLatitude>
                        <gco:Decimal>45.58911139518</gco:Decimal>
                     </gmd:northBoundLatitude>
                  </gmd:EX_GeographicBoundingBox>
               </gmd:geographicElement>
            </gmd:EX_Extent>
         </gmd:extent>
         <gmd:supplementalInformation gco:nilReason="missing">
            <gco:CharacterString/>
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  <gmd:contentInfo xmlns:gfc="http://www.isotc211.org/2005/gfc" xmlns:gml="http://www.opengis.net/gml"
                    xmlns:sdi="http://www.easysdi.org/2011/sdi"
                    xmlns:xlink_2="http://www.w3.org/1999/xlink">
      <gmd:MD_FeatureCatalogueDescription>
         <gmd:includedWithDataset>
            <gco:Boolean>true</gco:Boolean>
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         <gmd:featureCatalogueCitation>
            <gmd:CI_Citation>
               <gmd:title gco:nilReason="missing">
                  <gco:CharacterString/>
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               <gmd:date>
                  <gmd:CI_Date>
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                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#CI_DateTypeCode"
                                             codeListValue=""/>
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               </gmd:date>
            </gmd:CI_Citation>
         </gmd:featureCatalogueCitation>
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  <gmd:distributionInfo xmlns:gfc="http://www.isotc211.org/2005/gfc" xmlns:gml="http://www.opengis.net/gml"
                         xmlns:sdi="http://www.easysdi.org/2011/sdi"
                         xmlns:xlink_2="http://www.w3.org/1999/xlink">
      <gmd:MD_Distribution>
         <gmd:distributionFormat>
            <gmd:MD_Format>
               <gmd:name>
                  <gco:CharacterString>Shp</gco:CharacterString>
               </gmd:name>
               <gmd:version>
                  <gco:CharacterString>1.0</gco:CharacterString>
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            </gmd:MD_Format>
         </gmd:distributionFormat>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>http://www.adera.fr/cellules/geo-transfert</gmd:URL>
                     </gmd:linkage>
                     <gmd:protocol>
                        <gco:CharacterString>WWW:LINK-1.0-http--link</gco:CharacterString>
                     </gmd:protocol>
                     <gmd:name>
                        <gco:CharacterString>Adresse organisme</gco:CharacterString>
                     </gmd:name>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
      </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo xmlns:gfc="http://www.isotc211.org/2005/gfc" xmlns:gml="http://www.opengis.net/gml"
                        xmlns:sdi="http://www.easysdi.org/2011/sdi"
                        xmlns:xlink_2="http://www.w3.org/1999/xlink">
      <gmd:DQ_DataQuality>
         <gmd:scope>
            <gmd:DQ_Scope>
               <gmd:level>
                  <gmd:MD_ScopeCode codeList="http://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_ScopeCode"
                                    codeListValue="dataset"/>
               </gmd:level>
               <gmd:extent>
                  <gmd:EX_Extent>
                     <gmd:description>
                        <gco:CharacterString>Le traitement s'étend sur différents sites de la côte Aquitaine</gco:CharacterString>
                     </gmd:description>
                  </gmd:EX_Extent>
               </gmd:extent>
            </gmd:DQ_Scope>
         </gmd:scope>
         <gmd:lineage>
            <gmd:LI_Lineage>
               <gmd:statement>
                  <gco:CharacterString>La bathymétrie des petits fonds est reconstruite par inversion des crêtes de houle visibles sur des données spatiales optiques et radars. L'utilisation d'une méthode d'inversion basée sur la relation de dispersion linéaire permet de calculer la profondeur à partir de la longueur d'onde et de la période des vagues. Pour améliorer la détection des longueurs d'onde des vagues un pré-traitement est appliqué systématiquement aux images. Les images sont tout d'abord filtrées pour améliorer la visibilité des crêtes de vagues, puis la longueur d'onde est obtenue par corrélations 2D. Le calcul des longueurs d'onde est réalisé de façon itérative sous forme d'un suivi des lignes de vagues. Lorsque les crêtes de houle ne sont pas détectables, aucune mesure de longeur d'onde  n'est effectuée. Les valeurs mesurées sont inversées en profondeurs et une interpolation permet d'estimer les données manquantes. Les profondeurs sont enfin transformées en valeurs de bathymétrie par soustraction de la hauteur d'eau au dessus du zéro hydrographique au moment de la prise de vue. L'erreur relative moyenne sur le calcul de la profondeur est d'environ 10%. La gamme de profondeur inversée dépend des conditions de vague (période) et varie donc suivant les cartes produites.</gco:CharacterString>
               </gmd:statement>
               <gmd:source>
                  <gmd:LI_Source>
                     <gmd:description>
                        <gco:CharacterString>Source : qui a constitué la donnée ?</gco:CharacterString>
                     </gmd:description>
                     <gmd:sourceReferenceSystem>
                        <gmd:MD_ReferenceSystem>
                           <gmd:referenceSystemIdentifier>
                              <gmd:RS_Identifier>
                                 <gmd:code>
                                    <gco:CharacterString>RGF93 / Lambert-93 (EPSG:2154)</gco:CharacterString>
                                 </gmd:code>
                              </gmd:RS_Identifier>
                           </gmd:referenceSystemIdentifier>
                        </gmd:MD_ReferenceSystem>
                     </gmd:sourceReferenceSystem>
                  </gmd:LI_Source>
               </gmd:source>
            </gmd:LI_Lineage>
         </gmd:lineage>
      </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
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