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    <p>Hi,</p>
    <p>I changed the link so you have access to more files.</p>
    <p><a class="moz-txt-link-freetext" href="https://drive.google.com/drive/folders/1fMl9odowUFFRQFK61rTxgHeom_D8ymN6?usp=sharing">https://drive.google.com/drive/folders/1fMl9odowUFFRQFK61rTxgHeom_D8ymN6?usp=sharing</a></p>
    <p>Nicolas<br>
    </p>
    <div class="moz-cite-prefix">On 2020-12-01 1:58 p.m., Kirk Schmidt
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:5ec4beb6-b113-b69a-75b1-3faf50d1fc74@nortekresources.com">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <p>Hi Nicolas<br>
      </p>
      <p>I did the same and the legend indicates a change magnitude but
        if I subtract the geopackage raster from the original, all
        pixels equal zero.</p>
      <p> Kirk<br>
      </p>
      <div class="moz-cite-prefix">On 12/1/2020 2:36 PM, Nicolas Cadieux
        wrote:<br>
      </div>
      <blockquote type="cite"
        cite="mid:ffcfec85-52a4-5348-bbec-ca4119398c04@gmail.com">
        <p>Hi,</p>
        <p>Tried this:<br>
        </p>
        <p>gdal_translate -of GPKG -b 1
          C:/Users/Nicolas/Desktop/Land_cover_Corine2018.tif
          C:/Users/Nicolas/Desktop/test.gpkg</p>
        <p>I read 4 band and still get data modifications.</p>
        <p>Nicolas<br>
        </p>
        <div class="moz-cite-prefix">On 2020-12-01 1:28 p.m., Kirk
          Schmidt wrote:<br>
        </div>
        <blockquote type="cite"
          cite="mid:2a8cb288-13e4-17e2-a9f4-f5d38f5be283@nortekresources.com">
          <p>Hi Nicolas:</p>
          <p>try the -b 1 parameter.  I just tried this and wrote a
            single band raster from a 3 channel tiff.</p>
          <p>Kirk<br>
          </p>
          <div class="moz-cite-prefix">On 12/1/2020 2:03 PM, Nicolas
            Cadieux wrote:<br>
          </div>
          <blockquote type="cite"
            cite="mid:1e19158c-e195-f6e6-d839-8abb05739258@gmail.com">
            <p>I tried <br>
            </p>
            <p>gdal_translate -of GPKG -co "BAND_COUNT=1"
              C:/Users/Nicolas/Desktop/Land_cover_Corine2018.tif
              C:/Users/Nicolas/Desktop/TEST.gpkg for the creation and <br>
            </p>
            <p>C:\>gdal_translate -of GPKG -co "TILE_FORMAT = TIFF"
              C:/Users/Nicolas/Desktop/Land_cover_Corine2018.tif
              C:/Users/Nicolas/Desktop/TEST.gpkg</p>
            <p>Same problem.  I wonder if we need to change the reading
              options... <a class="moz-txt-link-freetext"
                href="https://gdal.org/drivers/raster/gpkg.html"
                moz-do-not-send="true">https://gdal.org/drivers/raster/gpkg.html</a></p>
            <h2>"Opening options</h2>
            <p>By default, the driver will expose a GeoPackage dataset
              as a four band (Red,Green, Blue,Alpha) dataset, which
              gives the maximum compatibility with the various encodings
              of tiles that can be stored. It is possible to specify an
              explicit number of bands with the BAND_COUNT opening
              option."</p>
            <p>The problem could be when QGIS Reads the file, not when
              it writes the file.  I explains why we see 4 bands but not
              why values are changing.  I would make a bug report or ask
              the question on the gdal dev group to get Even Rouault's
              attention.<br>
            </p>
            <p>Nicolas<br>
            </p>
            <p><br>
            </p>
            <div class="moz-cite-prefix">On 2020-12-01 12:17 p.m.,
              Sebastian Gutwein wrote:<br>
            </div>
            <blockquote type="cite"
cite="mid:CAED_52pFuAzSH3UtyR6S4M_dKBJ60pU2Jx1+P0Be2EOEOkGv7g@mail.gmail.com">
              <div dir="ltr">This looks like the same issue you are
                having. <a
                  href="http://github.com/qgis/QGIS/issues/38227"
                  moz-do-not-send="true">github.com/qgis/QGIS/issues/38227</a>
                <div>According to the documentation linked in the issue
                  you need to set the band count to 1 otherwise it
                  defaults to 4. </div>
                <div><a href="http://gdal.org/drivers/raster/gpkg.html"
                    moz-do-not-send="true">gdal.org/drivers/raster/gpkg.html</a><br>
                </div>
                <div>I have not tried this to see if it works. </div>
              </div>
              <br>
              <div class="gmail_quote">
                <div dir="ltr" class="gmail_attr">On Tue, Dec 1, 2020 at
                  11:52 AM Nicolas Cadieux <<a
                    href="mailto:njacadieux.gitlab@gmail.com"
                    moz-do-not-send="true">njacadieux.gitlab@gmail.com</a>>
                  wrote:<br>
                </div>
                <blockquote class="gmail_quote">
                  <div>
                    <p>Hi,<br>
                    </p>
                    <p>Looking at it now.  I see what you see.  I will
                      try a few things.</p>
                    <p>Nicolas<br>
                    </p>
                    <div>On 2020-12-01 11:42 a.m., Alberto Vavassori
                      wrote:<br>
                    </div>
                    <blockquote type="cite">
                      <div>
                        <p class="MsoNormal"><span>Hi Nicolas,</span></p>
                        <p class="MsoNormal"><span lang="EN-US">thank
                            you for the answer. I send the raster that I
                            am interested in.</span></p>
                        <p class="MsoNormal"><span lang="EN-US">Alberto</span></p>
                        <p class="MsoNormal"><span lang="EN-US"> </span></p>
                        <div>
                          <div>
                            <p class="MsoNormal"><b><span>Da:</span></b><span>
                                Nicolas Cadieux <a
                                  href="mailto:njacadieux.gitlab@gmail.com"
                                  target="_blank" moz-do-not-send="true"><njacadieux.gitlab@gmail.com></a>
                                <br>
                                <b>Inviato:</b> martedì 1 dicembre 2020
                                17:40<br>
                                <b>A:</b> Alberto Vavassori <a
                                  href="mailto:alberto.vavassori@polimi.it"
                                  target="_blank" moz-do-not-send="true"><alberto.vavassori@polimi.it></a><br>
                                <b>Cc:</b> <a
                                  href="mailto:qgis-user@lists.osgeo.org"
                                  target="_blank" moz-do-not-send="true">qgis-user@lists.osgeo.org</a><br>
                                <b>Oggetto:</b> Re: [Qgis-user]
                                Importing a raster into a Geopackage</span></p>
                          </div>
                        </div>
                        <p class="MsoNormal"> </p>
                        <p>Hi,<span></span></p>
                        <p>Send a sample data set if you can't figure it
                          out.</p>
                        <p>Nicolas</p>
                        <div>
                          <p class="MsoNormal">On 2020-12-01 10:35 a.m.,
                            Nicolas Cadieux wrote:</p>
                        </div>
                        <blockquote>
                          <p class="MsoNormal">Hi, </p>
                          <div>
                            <p class="MsoNormal">Perhaps this can help: <a
href="https://gdal.orgdrivers/raster/gpkg.html" target="_blank"
                                moz-do-not-send="true">https://gdal.orgdrivers/raster/gpkg.html</a></p>
                          </div>
                          <div>
                            <p class="MsoNormal"> </p>
                          </div>
                          <div>
                            <p> <span>“Various kind of input datasets
                                can be converted to GeoPackage raster :</span></p>
                            <p> <span><span>·<span>        </span></span></span><span>Single
                                band grey level</span></p>
                            <p> <span><span>·<span>        </span></span></span><span>Single
                                band with R,G,B or R,G,B,A color table</span></p>
                            <p> <span><span>·<span>        </span></span></span><span>Two
                                bands: first band with grey level,
                                second band with alpha channel</span></p>
                            <p> <span><span>·<span>        </span></span></span><span>Three
                                bands: Red, Green, Blue</span></p>
                            <p> <span><span>·<span>        </span></span></span><span>Four
                                band: Red, Green, Blue, Alpha</span></p>
                            <p> <span>GeoPackage rasters only support
                                Byte data type.”</span></p>
                            <p> <span>My guess is that if the original
                                raster does not correspond to one of the
                                categories above, it will be converted
                                to the closest format. </span></p>
                          </div>
                          <div>
                            <p class="MsoNormal"> </p>
                            <div>
                              <p class="MsoNormal">Nicolas Cadieux </p>
                              <div>
                                <p class="MsoNormal"><a
                                    href="https://gitlab.com/njacadieux"
                                    target="_blank"
                                    moz-do-not-send="true">https://gitlab.com/njacadieux</a></p>
                              </div>
                            </div>
                            <div>
                              <p class="MsoNormal"><br>
                                <br>
                              </p>
                              <blockquote>
                                <p class="MsoNormal">Le 1 déc. 2020 à
                                  09:58, Alberto Vavassori <a
                                    href="mailto:alberto.vavassori@polimi.it"
                                    target="_blank"
                                    moz-do-not-send="true"><alberto.vavassori@polimi.it></a>
                                  a écrit :</p>
                              </blockquote>
                            </div>
                            <blockquote>
                              <div>
                                <p class="MsoNormal"> <span></span></p>
                                <p class="MsoNormal"><span lang="EN-US">Hello
                                    everybody. I have an issue regarding
                                    the Geopackage format. I have tried
                                    to import a singleband raster file
                                    (it represents the land cover, thus
                                    every pixel has a single integer
                                    value corresponding to the land
                                    cover class), but this operation
                                    seems to modify the raster
                                    characteristics: the raster becomes
                                    a 4-bands raster and the pixels
                                    values change accordingly
                                    (basically, the original raster is
                                    saved in the Geopackage as an RGB
                                    image). It seems to be a bug of
                                    QGIS. I have also tried to use GDAL
                                    translate through the processing
                                    toolbox of QGIS to convert the TIFF
                                    file to a Geopackage file, but the
                                    result is the same.</span></p>
                                <p class="MsoNormal"><span lang="EN-US">Has
                                    anybody faced this problem? May
                                    anybody suggest a way to work this
                                    problem out?</span></p>
                                <p class="MsoNormal"><span lang="EN-US">Thank
                                    you.</span></p>
                                <p class="MsoNormal"><span lang="EN-US">Alberto</span></p>
                                <p class="MsoNormal"><span>_______________________________________________<br>
                                    Qgis-user mailing list<br>
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                              </div>
                            </blockquote>
                          </div>
                        </blockquote>
                        <pre>-- </pre>
                        <pre>Nicolas Cadieux</pre>
                        <pre><a href="https://gitlab.com/njacadieux" target="_blank" moz-do-not-send="true">https://gitlab.com/njacadieux</a></pre>
                      </div>
                    </blockquote>
                    <pre cols="72">-- 
Nicolas Cadieux
<a href="https://gitlab.com/njacadieux" target="_blank" moz-do-not-send="true">https://gitlab.com/njacadieux</a></pre>
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                </blockquote>
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            </blockquote>
            <pre class="moz-signature" cols="72">-- 
Nicolas Cadieux
<a class="moz-txt-link-freetext" href="https://gitlab.com/njacadieux" moz-do-not-send="true">https://gitlab.com/njacadieux</a></pre>
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          <pre class="moz-signature" cols="72">-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: <a class="moz-txt-link-abbreviated" href="mailto:kirk@nortekresources.com" moz-do-not-send="true">kirk@nortekresources.com</a>
Web: <a class="moz-txt-link-abbreviated" href="http://www.nortekresources.com" moz-do-not-send="true">www.nortekresources.com</a></pre>
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        <pre class="moz-signature" cols="72">-- 
Nicolas Cadieux
<a class="moz-txt-link-freetext" href="https://gitlab.com/njacadieux" moz-do-not-send="true">https://gitlab.com/njacadieux</a></pre>
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</pre>
      </blockquote>
      <pre class="moz-signature" cols="72">-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: <a class="moz-txt-link-abbreviated" href="mailto:kirk@nortekresources.com" moz-do-not-send="true">kirk@nortekresources.com</a>
Web: <a class="moz-txt-link-abbreviated" href="http://www.nortekresources.com" moz-do-not-send="true">www.nortekresources.com</a></pre>
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    <pre class="moz-signature" cols="72">-- 
Nicolas Cadieux
<a class="moz-txt-link-freetext" href="https://gitlab.com/njacadieux">https://gitlab.com/njacadieux</a></pre>
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