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        <gco:CharacterString><![CDATA[Cette géodonnée est  produite et mise à disposition par l'Office fédérale de topographie swisstopo.
Elle est redistribuée gratuitement par l'ASIT sous forme de téléchargement direct (ouvert à tous) ou de commande à façon (service réservé aux membres ASIT exclusivement).

Description selon swisstopo :
«  swissSURFACE3D décrit tous les éléments naturels et construits de la surface de la Suisse sous forme d’un nuage de points classifiés. Acquises par LiDAR aéroporté, ces données bénéficient d’une densité spatiale et d’une précision élevée.  La densité spatiale minimale des données est de 5 pts/m2. La densité spatiale moyenne évolue entre 15 et 20 pts/m2. »

Le format, la taille des fichiers et la classification dépendent de l'année de vol : 

A partir de 2024 : 
· Format : Cloud optimized point cloud LAZ 1.4 (COPC)  ~ 200 MB / tuile
· Classification des données :
    1. Non classifiés et objets temporaires
    2. Sol
    3. Végétation (basse – moyenne – haute)
    6. Toitures de bâtiments
    9. Eaux de surface
    14. Ligne à haute tension et ligne de transport
    15. Mâts avec fonction portante
    17. Tablier de ponts, passerelles, viaducs
    26. Façades des bâtiments
    27. Piliers de ponts et haubans de viaducs

Jusqu'en 2024 :
· Format : LAS 1.2 : téléchargement gratuit ~ 610 MB / tuile
· Classification des données :
    1. Non classifié (objets temporaires, lignes aériennes, mâts, véhicules, etc)
    2. Sol
    3. Végétation
    6. Bâtiments
    9. Eau
    17. Ponts, passerelles, viaducs
    
Synoptique des années de vol : https://map.geo.admin.ch/#/map?lang=fr&layers=ch.swisstopo.swisssurface3d.metadata&bgLayer=ch.swisstopo.pixelkarte-grau


Mots-clés : swissSURFACE , SURFACE3D , MNS]]></gco:CharacterString>
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2) pour toute commande supérieure à 2km de long, vous recevrez autant de fichiers LAS ou LAZ (COPC) que de tuiles intersectant le périmètre de commande

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            <gcx:Anchor xlink:href="https://opendata.swiss/en/terms-of-use/#terms_by">Opendata BY: Utilisation libre. Obligation d’indiquer la source.</gcx:Anchor>
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              <cit:function>
                <cit:CI_OnLineFunctionCode codeList="https://standards.iso.org/iso/19115/resources/Codelists/cat/codelists.xml#CI_OnLineFunctionCode" codeListValue="download">download</cit:CI_OnLineFunctionCode>
              </cit:function>
            </cit:CI_OnlineResource>
          </mrd:onLine>
        </mrd:MD_DigitalTransferOptions>
      </mrd:transferOptions>
    </mrd:MD_Distribution>
  </mdb:distributionInfo>
  <mdb:resourceLineage>
    <mrl:LI_Lineage>
      <mrl:statement>
        <gco:CharacterString>swissSURFACE3D est issu de données de LiDAR aéroporté et contient plusieurs millions de points par km2. Ces points, répartis de manière irrégulière dans l'espace, modélisent le territoire en 3D avec une densité spatiale élevée. &#13;
&#13;
Les données LiDAR acquises par des autorités cantonales sont par endroits également intégrées à swissSURFACE3D.</gco:CharacterString>
      </mrl:statement>
    </mrl:LI_Lineage>
  </mdb:resourceLineage>
</che:CHE_MD_Metadata>
