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  </gmd:distributorContact>        </gmd:MD_Distributor>      </gmd:distributor>      <gmd:transferOptions>        <gmd:MD_DigitalTransferOptions>          <gmd:onLine>            <gmd:CI_OnlineResource>              <gmd:linkage>                <gmd:URL>https://webgis.adbpo.it/catalogue/#/dataset/1842</gmd:URL>              </gmd:linkage>              <gmd:protocol>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceCategory/humanCatalogueViewer">Visualizzatore del catalogo [NON UFFICIALE]</gmx:Anchor>              </gmd:protocol>              <gmd:applicationProfile>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceType/other">Altri servizi</gmx:Anchor>              </gmd:applicationProfile>              <gmd:description>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/OnLineDescriptionCode/accessPoint">access point</gmx:Anchor>              </gmd:description>            </gmd:CI_OnlineResource>          </gmd:onLine>          <gmd:onLine>            <gmd:CI_OnlineResource>              <gmd:linkage>                <gmd:URL>https://webgis.adbpo.it/geoserver/ows</gmd:URL>              </gmd:linkage>              <gmd:protocol>                <gmx:Anchor xlink:href="http://www.opengis.net/def/serviceType/ogc/wms">OGC Web Map Service</gmx:Anchor>              </gmd:protocol>              <gmd:applicationProfile>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceType/view">Servizio di consultazione</gmx:Anchor>              </gmd:applicationProfile>              <gmd:name>                <gco:CharacterString>geonode:DTM_Po_2021_adbpo</gco:CharacterString>              </gmd:name>              <gmd:description>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/OnLineDescriptionCode/accessPoint">access point</gmx:Anchor>              </gmd:description>            </gmd:CI_OnlineResource>          </gmd:onLine>          <gmd:onLine>            <gmd:CI_OnlineResource>              <gmd:linkage>                <gmd:URL>https://webgis.adbpo.it/geoserver/ows</gmd:URL>              </gmd:linkage>              <gmd:protocol>                <gmx:Anchor xlink:href="http://www.opengis.net/def/serviceType/ogc/wcs">OGC Web Coverage Service</gmx:Anchor>              </gmd:protocol>              <gmd:applicationProfile>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/SpatialDataServiceType/download">Servizio di scaricamento</gmx:Anchor>              </gmd:applicationProfile>              <gmd:name>                <gco:CharacterString>geonode:DTM_Po_2021_adbpo</gco:CharacterString>              </gmd:name>              <gmd:description>                <gmx:Anchor xlink:href="http://inspire.ec.europa.eu/metadata-codelist/OnLineDescriptionCode/accessPoint">access point</gmx:Anchor>              </gmd:description>            </gmd:CI_OnlineResource>          </gmd:onLine>        </gmd:MD_DigitalTransferOptions>      </gmd:transferOptions>    </gmd:MD_Distribution>  </gmd:distributionInfo>  <gmd:dataQualityInfo>    <gmd:DQ_DataQuality>      <gmd:scope>        <gmd:DQ_Scope>          <gmd:level>            <gmd:MD_ScopeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/ML_gmxCodelists.xml#MD_ScopeCode" codeListValue="dataset">dataset</gmd:MD_ScopeCode>          </gmd:level>        </gmd:DQ_Scope>      </gmd:scope>      <gmd:report>        <gmd:DQ_AbsoluteExternalPositionalAccuracy>          <gmd:result>            <gmd:DQ_QuantitativeResult>              <gmd:valueUnit>                <gml:BaseUnit gml:id="UD1">                  <gml:identifier codeSpace="http://www.bipm.org/en/si/base_units">m</gml:identifier>                  <gml:unitsSystem xlink:href="http://www.bipm.org/en/si"/>                </gml:BaseUnit>              </gmd:valueUnit>              <gmd:value>                <gco:Record>                  <gco:Real>0.3</gco:Real>                </gco:Record>              </gmd:value>            </gmd:DQ_QuantitativeResult>          </gmd:result>        </gmd:DQ_AbsoluteExternalPositionalAccuracy>      </gmd:report>      <gmd:report>        <gmd:DQ_DomainConsistency>          <gmd:result>            <gmd:DQ_ConformanceResult>              <gmd:specification>                <gmd:CI_Citation>                  <gmd:title>                    <gco:CharacterString>REGOLAMENTO (UE) N. 1089/2010 DELLA COMMISSIONE del 23 novembre 2010 recante attuazione della direttiva 2007/2/CE del Parlamento europeo e del Consiglio per quanto riguarda l'interoperabilità dei set di dati territoriali e dei servizi di dati territoriali</gco:CharacterString>                  </gmd:title>                  <gmd:date>                    <gmd:CI_Date>                      <gmd:date>                        <gco:Date>2010-12-08</gco:Date>                      </gmd:date>                      <gmd:dateType>                        <gmd:CI_DateTypeCode codeList="http://standards.iso.org/ittf/PubliclyAvailableStandards/ISO_19139_Schemas/resources/Codelist/ML_gmxCodelists.xml#CI_DateTypeCode" codeListValue="publication">publication</gmd:CI_DateTypeCode>                      </gmd:dateType>                    </gmd:CI_Date>                  </gmd:date>                </gmd:CI_Citation>              </gmd:specification>              <gmd:explanation>                <gco:CharacterString>non valutato</gco:CharacterString>              </gmd:explanation>              <gmd:pass><gco:Boolean>true</gco:Boolean></gmd:pass>            </gmd:DQ_ConformanceResult>          </gmd:result>        </gmd:DQ_DomainConsistency>      </gmd:report>      <gmd:lineage>        <gmd:LI_Lineage>          <gmd:statement>            <gco:CharacterString>L’azienda esecutrice ha effettuato il rilievo tra i giorni 31/03/2021 e-02/04/2021 tramite piattaforma aerea che ha volato alla quota di 1720 metri. La ripresa LiDAR ha ottenuto una densità media di 4 punti/m2.Per le fasi di pre-processing e processing del dato è stata utilizzata la suite di programmi per il trattamento di dati LiDAR ed immagini della società finlandese TerraSolid. Partendo dai dati classificati della nuvola di punti LiDAR si è proceduto alla generazione del DTM a maglia regolare interpolando i “buchi” in corrispondenza di edifici, manufatti in genere e/o delle superfici coperte di acqua. L’interpolazione è un procedimento semiautomatico talvolta integrato con operazioni manuali. Tutte le fasi esottofasi di lavoro sono state soggette a controlli di qualità interni e alla verifica di qualità da parte dell’Autorità di bacino distrettuale del Fiume Po. Il prodotto ottenuto dai dati x, y, z last pulse, opportunamente selezionati, filtrati e interpolati, ha come risultato una griglia ordinata di celle regolari una rappresentazione tridimensionale della superficie fisica del suolo, che ha eliminato, sia con algoritmi automatici che manualmente dall’operatore, tutti gli oggetti che non corrispondono al terreno (es. edifici, coperture arboree, vegetazione, pali, cavi, ecc.). Il modello risultante dall’acquisizione è costituito da celle quadrate della dimensione di 1 metro per lato e, conformemente alle specifiche, presenta un’accuratezza altimetrica corrispondente a +/- 15 cm, mentre l’accuratezza planimetrica è di +/- 30 cm. L’azienda esecutrice ha consegnato 690 files rappresentanti il modello in formato *.asc, per questo mosaico ne sono state utilizzate 68. Tutti i file sono prodotti nel sistema di riferimento identificato dal codice EPSG 7791. Le tavolette sono state mosaicate, dall’Autorità di bacino distrettuale del fiume Po, in un unico file in formato *.tiff (geotiff) imponendo come sistema di riferimento lo stesso di origine (EPSG:7791) ed assegnando come valore “no data” il valore -9999. Il file raster risultante è stato ottimizzato attraverso compressione (deflate), tiling (blocchi di 512x512) e creazione delle overview interne (resample nearest neighbour).</gco:CharacterString>          </gmd:statement>        </gmd:LI_Lineage>      </gmd:lineage>    </gmd:DQ_DataQuality>  </gmd:dataQualityInfo>
</gmd:MD_Metadata>