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            <gco:CharacterString>Date de validité de la fiche de métadonnées version 1 (date d'expiration de le licence IGN)</gco:CharacterString>
          </gmd:description>
          <gmd:temporalElement>
            <gmd:EX_TemporalExtent>
              <gmd:extent>
                <gml:TimePeriod gml:id="timePeriod_-1672111604">
                  <gml:beginPosition>2013-08-31</gml:beginPosition>
                  <gml:endPosition>2020-12-31</gml:endPosition>
                </gml:TimePeriod>
              </gmd:extent>
            </gmd:EX_TemporalExtent>
          </gmd:temporalElement>
        </gmd:EX_Extent>
      </gmd:extent>
      <gmd:extent>
        <gmd:EX_Extent>
          <gmd:description>
            <gco:CharacterString>Département du Bas-Rhin</gco:CharacterString>
          </gmd:description>
          <gmd:geographicElement>
            <gmd:EX_GeographicBoundingBox>
              <gmd:westBoundLongitude>
                <gco:Decimal>6.94</gco:Decimal>
              </gmd:westBoundLongitude>
              <gmd:eastBoundLongitude>
                <gco:Decimal>8.23</gco:Decimal>
              </gmd:eastBoundLongitude>
              <gmd:southBoundLatitude>
                <gco:Decimal>48.12</gco:Decimal>
              </gmd:southBoundLatitude>
              <gmd:northBoundLatitude>
                <gco:Decimal>49.08</gco:Decimal>
              </gmd:northBoundLatitude>
            </gmd:EX_GeographicBoundingBox>
          </gmd:geographicElement>
        </gmd:EX_Extent>
      </gmd:extent>
    </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo xmlns="http://www.isotc211.org/2005/gmd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gss="http://www.isotc211.org/2005/gss" xmlns:xi="http://www.w3.org/2001/XInclude">
    <gmd:MD_Distribution>
      <gmd:distributionFormat>
        <gmd:MD_Format>
          <gmd:name>
            <gco:CharacterString>ECW</gco:CharacterString>
          </gmd:name>
          <gmd:version>
            <gco:CharacterString>Enhanced Compression Wavelet</gco:CharacterString>
          </gmd:version>
          <gmd:specification>
            <gco:CharacterString>Images compressées ECW</gco:CharacterString>
          </gmd:specification>
        </gmd:MD_Format>
      </gmd:distributionFormat>
      <gmd:transferOptions>
        <gmd:MD_DigitalTransferOptions>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://www.datagrandest.fr/geoserver/cd67/wms</gmd:URL>
              </gmd:linkage>
              <gmd:protocol>
                <gco:CharacterString>OGC:WMS</gco:CharacterString>
              </gmd:protocol>
              <gmd:name>
                <gco:CharacterString>CD67_SCAN25_BR_2010_TIF_CC48</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>WMS - SCAN 25 de l'IGN (mise à jour des dalles entre 2003 et 2009)</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
          <gmd:onLine>
            <gmd:CI_OnlineResource>
              <gmd:linkage>
                <gmd:URL>https://geoservices.alsace.eu/catalogue/document/DOCT_Conditions_utilisation_IGN_2010.pdf</gmd:URL>
              </gmd:linkage>
              <gmd:name>
                <gco:CharacterString>Conditions générales d'utilisation des fichiers IGN</gco:CharacterString>
              </gmd:name>
              <gmd:description>
                <gco:CharacterString>Conditions générales d'utilisation des fichiers IGN</gco:CharacterString>
              </gmd:description>
            </gmd:CI_OnlineResource>
          </gmd:onLine>
        </gmd:MD_DigitalTransferOptions>
      </gmd:transferOptions>
    </gmd:MD_Distribution>
  </gmd:distributionInfo>
  <gmd:dataQualityInfo xmlns="http://www.isotc211.org/2005/gmd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:gss="http://www.isotc211.org/2005/gss" xmlns:xi="http://www.w3.org/2001/XInclude">
    <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:DQ_Scope>
      </gmd:scope>
      <gmd:lineage>
        <gmd:LI_Lineage>
          <gmd:statement>
            <gco:CharacterString>La résolution (taille terrain du pixel) est de 2,5m ce qui correspond à une résolution de 254dpi à l'échelle du 1:25000. La radiométrie de chaque pixel est codée sur 1 octet (8 bits) en 256 couleurs indéxées (216 couleurs en cas de scannage). La réduction radiométrique d'une dalle originale utilise une table de correspondance fixe (look-up table - LUT) avec option de diffusion pour simuler une tablette plus large. Cette LUT comporte l'ensemble des anciennes et nouvelles couleurs du produit. La qualité colorimétrique dépend principalement du scannage ou de la rasterisation des dalles: pour un scannage, il n'y a pas d'homogénéité en terme de couleur et de trame; dans le cas d'une rasterisation directe des données vecteurs, la qualité graphique est meilleure (colorimétrie homogène et abscence de trame). Le Scan 25 a la même précision géométrique que les cartes au 1:25000, de l'ordre de 2 à 8 mètre par feuille selon la source (Série Bleue, Top25, ou autre). Le mosaïquage assure la continuité cartographique sur le territoire couvert. La précision et les informations cartographiques n'étant pas toujours positionnées et généralisées de la même façon entre 2 cartes, des incohérences de continuité peuvent apparaître entre les dalles. Les objets cartographiques (symboles, toponymes, etc.) peuvent être de plus dédoublés ou tronqués en bord de dalle.
Le Scan 25 est issu de la rasterisation des cartes de la série 1:25000 de l'IGN, puis de l'assemblage sous forme de mosaïque d'image de 10km sur 10km (4000 pixels sur 4000 pixels). Dans le cas de recouvrement de cartes, c'est la carte la plus récente qui est conservée.  L'origine du découpage dépend de la zone géographique et de la projection. La patrtie étrangère à l'emprise est complétée par du blanc.
Données source : Cartes de la série 1:25000 de l'IGN</gco:CharacterString>
          </gmd:statement>
        </gmd:LI_Lineage>
      </gmd:lineage>
      <gmd:report />
    </gmd:DQ_DataQuality>
  </gmd:dataQualityInfo>
</gmd:MD_Metadata>

