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    <p>La matrice del raster contiene necessariamente tutti i pixel...
      meno di nodata non puoi avere...<br>
    </p>
    <p>Forse puoi provare a esportare il raster (con Save As) settando
      un livello di compressione alto tra i parametri.</p>
    <p>Ale<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 18/01/2017 14:41, giulia chersoni
      wrote:<br>
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      cite="mid:10DE7200-325E-441B-A9A0-502CFD90B073@gmail.com"
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      In realtà vorrei cancellare quella porzioni di dati. 
      <div class="">Da quanto ho capito l’operazione che mi consigliavi
        riguarda solo la visualizzazione. Avrei bisogno di alleggerire
        il file perché devo importarlo su un altro software e così pesa
        troppo.</div>
      <div class=""><br class="">
      </div>
      <div class="">Grazie!<br class="">
        <div>
          <blockquote type="cite" class="">
            <div class="">Il giorno 18/gen/2017, alle ore 14:38,
              Alessandro Sarretta <<a moz-do-not-send="true"
                href="mailto:alessandro.sarretta@gmail.com" class="">alessandro.sarretta@gmail.com</a>>
              ha scritto:</div>
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                <p class="">Ciao,</p>
                <p class="">penso che basta che cambi lo stile di
                  rappresentazione assegnando il bianco o una
                  trasparenza quando hai nodata. (se è questo ciò che
                  vuoi fare...)<br class="">
                </p>
                <p class="">Ale<br class="">
                </p>
                <br class="">
                <div class="moz-cite-prefix">On 18/01/2017 14:35, giulia
                  chersoni wrote:<br class="">
                </div>
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                  cite="mid:1D835ADC-7258-4741-BF1B-F3533C7E4C38@gmail.com"
                  type="cite" class="">
                  <pre class="" wrap="">Salve a tutti,
sto lavorando con dei raster layer su Qgis/Arcgis. 
Mi chiedevo se ci fosse un modo per cancellare la cornice intorno all’immagine raster, dove attualmente ho “no data”.


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</pre>
                </blockquote>
                <br class="">
                <div class="moz-signature">-- <br class="">
                  <font class="" face="courier,verdana,arial,sans-serif"
                    color="grey" size="2"> --
                    <p class="">Alessandro Sarretta</p>
                    <p class=""> skype/twitter: alesarrett<br class="">
                      Web: <a moz-do-not-send="true"
                        href="http://ilsarrett.wordpress.com/" class="">ilsarrett.wordpress.com</a>
                    </p>
                    <p class="">Research information:<br class="">
                    </p>
                    <ul class="">
                      <li class=""><a moz-do-not-send="true"
                          href="http://scholar.google.it/citations?user=IsyXargAAAAJ&hl=it"
                          class="">Google scholar profile</a></li>
                      <li class=""><a moz-do-not-send="true"
                          href="http://orcid.org/0000-0002-1475-8686"
                          class="">ORCID</a></li>
                      <li class=""><a moz-do-not-send="true"
                          href="https://www.researchgate.net/profile/Alessandro_Sarretta"
                          class="">Research Gate</a></li>
                      <li class=""><a moz-do-not-send="true"
                          href="https://impactstory.org/AlessandroSarretta"
                          class="">Impactstory</a></li>
                      <!-- <li><a href="https://impactstory.org/AlessandroSarretta"><img src="https://impactstory.org/logo/small" width="80" /></a></li> -->
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              <a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/qgis-it-user">https://lists.osgeo.org/mailman/listinfo/qgis-it-user</a><br
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            </div>
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      </div>
    </blockquote>
    <br>
    <div class="moz-signature">-- <br>
      <font face="courier,verdana,arial,sans-serif" color="grey"
        size="2">
        --
        <p>Alessandro Sarretta</p>
        <p>
          skype/twitter: alesarrett<br>
          Web: <a href="http://ilsarrett.wordpress.com">ilsarrett.wordpress.com</a>
        </p>
        <p>Research information:<br>
        </p>
        <ul>
          <li><a
              href="http://scholar.google.it/citations?user=IsyXargAAAAJ&hl=it">Google
              scholar profile</a></li>
          <li><a href="http://orcid.org/0000-0002-1475-8686">ORCID</a></li>
          <li><a
              href="https://www.researchgate.net/profile/Alessandro_Sarretta">Research
              Gate</a></li>
          <li><a href="https://impactstory.org/AlessandroSarretta">Impactstory</a></li>
          <!-- <li><a href="https://impactstory.org/AlessandroSarretta"><img src="https://impactstory.org/logo/small" width="80" /></a></li> -->
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