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    <p>Hi,</p>
    <p>Ok what you want to do is to sample a raster with data points
      (and not merge two rasters).   This mean you have a csv of points
      and a raster with values.  You want the values of the raster to be
      added to a column in the csv.   When you open both layers, do they
      appear to be well placed in space (georeferenced) and one on top
      of the other?  If not, right click on the layer in the layer panel
      and go to "set CRS/Set layer CRS".  Once both layers are in the
      correct CRS, they should be one on top of the other.  <br>
    </p>
    <p>Then used the Processing tool (sample raster values) or install
      the Point Sampling tool. Both are plugins that need to be
      activated under the plugins menu but the Point Sampling tool will
      need to be installed first.  You will need to save the CSV in
      another format because you cannot write to a CSV.  Use Shp or
      better, Geopackage.<br>
    </p>
    <p>Nicolas<br>
    </p>
    <p><br>
    </p>
    <div class="moz-cite-prefix">On 2020-05-06 10:48 a.m., Nikos Benos
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAJw3XZ4xNZGcsq4tqJf1wTs55jAbpG52K2LoUsZOMxqdHdhY2Q@mail.gmail.com">
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        <div>Dear Nicolas,</div>
        <div><br>
        </div>
        <div>I have used the following methodology</div>
        <div><a
            href="https://www.qgistutorials.com/en/docs/3/sampling_raster_data.html"
            moz-do-not-send="true">https://www.qgistutorials.com/en/docs/3/sampling_raster_data.html</a></div>
        <div>It works fine, but the problem is that the coordinates of
          the tiff file are in different scale than the coordinates of
          the csv file.</div>
        <div>If I convert my csv file (list of points with their
          coordinates) in raster file, how will I combine 2 raster files
          to produce an excel file?</div>
        <div>Thank you very much in advance for your help.</div>
        <div><br>
        </div>
        <div>Best,</div>
        <div>Nikos<br>
        </div>
      </div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr" class="gmail_attr">Στις Τετ, 6 Μαΐ 2020 στις 4:36
          μ.μ., ο/η Nicolas Cadieux <<a
            href="mailto:nicolas.cadieux@archeotec.ca"
            moz-do-not-send="true">nicolas.cadieux@archeotec.ca</a>>
          έγραψε:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0px 0px 0px
          0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
          <div dir="auto">Hi,
            <div><br>
              <div>You can save a file and reproject it by changing the
                coordinates reference system (CRS).  That would change
                the coordinates (and the data dependent on the method
                used).  However, the is the csv a vector file (a file
                with a list of points for example) or is it a true
                raster file (a matrix).  If it’s a vector file, you will
                need to change it as a raster.  Look for rasterize or «
                vector to raster ».  Google it to understand the
                differences between raster and vector.<br>
                <br>
                <div dir="ltr">Nicolas Cadieux
                  <div>Ça va bien aller!</div>
                </div>
                <div dir="ltr"><br>
                  <blockquote type="cite">Le 6 mai 2020 à 02:22, Nikos
                    Benos <<a href="mailto:nbenos@uoi.gr"
                      target="_blank" moz-do-not-send="true">nbenos@uoi.gr</a>>
                    a écrit :<br>
                    <br>
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                    <div dir="ltr"><br>
                      <br>
                      <div class="gmail_quote">
                        <div dir="ltr" class="gmail_attr">----------
                          Forwarded message ---------<br>
                          Από: <b class="gmail_sendername" dir="auto">Nikos
                            Benos</b> <span dir="auto"><<a
                              href="mailto:nbenos@uoi.gr"
                              target="_blank" moz-do-not-send="true">nbenos@uoi.gr</a>></span><br>
                          Date: Τρί, 5 Μαΐ 2020 στις 12:25 μ.μ.<br>
                          Subject: Question<br>
                          To: <<a
                            href="mailto:qgis-user@lists.osgeo.org"
                            target="_blank" moz-do-not-send="true">qgis-user@lists.osgeo.org</a>><br>
                        </div>
                        <br>
                        <br>
                        <div dir="ltr">
                          <div>Dear Sir or Madam,</div>
                          <div><br>
                          </div>
                          <div>I hope all is well with you. I have
                            converted a png file to a tiff file (when I
                            attached it to the e-mail, the e-mail became
                            too big and was not sent). I have been
                            trying to combine the tiff file with a csv
                            file with no success. The reason is that the
                            coordinate units are different between the 2
                            files. <br>
                          </div>
                          <div>Since I have constructed myself the csv
                            file, is there any way to transform the
                            coordinate units of the png file to make
                            them compatible to those of the csv file?<br>
                          </div>
                          <div>Thank you very much in advance for our
                            help and I am sorry if this is a vdery
                            simple question, but I am very new to QGIS.</div>
                          <div><br>
                          </div>
                          <div>Best regards,</div>
                          <div>Nikos Benos<br>
                          </div>
                          <div>-- <br>
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                                    <pre cols="72">Dr Nikos Benos
Associate Professor
Department of Economics
University of Ioannina
University Campus
45110 Ioannina
GREECE
Tel: +30-26510-05955
Fax: +30-26510-05092
e-mail: <a href="mailto:nbenos@uoi.gr" target="_blank" moz-do-not-send="true">nbenos@uoi.gr</a></pre>
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                              <pre cols="72">Dr Nikos Benos
Associate Professor
Department of Economics
University of Ioannina
University Campus
45110 Ioannina
GREECE
Tel: +30-26510-05955
Fax: +30-26510-05092
e-mail: <a href="mailto:nbenos@uoi.gr" target="_blank" moz-do-not-send="true">nbenos@uoi.gr</a></pre>
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      <br>
      -- <br>
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        <div dir="ltr">
          <div>
            <div dir="ltr">
              <pre cols="72">Dr Nikos Benos
Associate Professor
Department of Economics
University of Ioannina
University Campus
45110 Ioannina
GREECE
Tel: +30-26510-05955
Fax: +30-26510-05092
e-mail: <a href="mailto:nbenos@uoi.gr" target="_blank" moz-do-not-send="true">nbenos@uoi.gr</a></pre>
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