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    cnMissingValFillColor:<br>
    <br>
    ...<br>
    Also note that the
    triangular mesh contouring algorithm does not distinguish between
    missing value areas and areas outside the grid boundary. Therefore
    if <a
      href="http://ncl.ucar.edu/Document/HLUs/Classes/ContourPlot.shtml"><strong>ContourPlot</strong></a>
    is given non-rectangular data or <a
href="http://ncl.ucar.edu/Document/Graphics/Resources/tr.shtml#trGridType"><em>trGridType</em></a>
    is explicitly set to <code>TriangularMesh</code>,
    the color index used will be the larger value of those assigned to
    the resources <a
href="http://ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnMissingValFillColor"><em>cnMissingValFillColor</em></a>
    and
    <a
href="http://ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnGridBoundFillColor"><em>cnGridBoundFillColor</em></a>.
    <br>
    <br>
    Maybe Mary, Dave or Rick can say somthing more about it.<br>
    <br>
    -Karin<br>
    <br>
    <div class="moz-cite-prefix">Am 29.09.17 um 17:23 schrieb Guido
      Cioni:<br>
    </div>
    <blockquote type="cite"
      cite="mid:8A1C5BB5-378D-4783-B632-890083687D92@gmail.com">
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      Yep, and I still get the same behaviour :( 
      <div class=""><br class="">
        <div class="">I also thought that was the case but then I read
          that "Transparent" is the default option for <span
            style="color: rgb(51, 51, 255);" class="">cnMissingValFillColor</span>.</div>
        <div class=""><br class="">
        </div>
        <div class="">Maybe it has something to do with the unstructured
          grid that I'm using? <br class="">
          <div class=""><br class="">
            <div>
              <blockquote type="cite" class="">
                <div class="">On 29. Sep 2017, at 17:14, Karin
                  Meier-Fleischer <<a
                    href="mailto:meier-fleischer@dkrz.de" class=""
                    moz-do-not-send="true">meier-fleischer@dkrz.de</a>>
                  wrote:</div>
                <br class="Apple-interchange-newline">
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                  <div text="#000000" bgcolor="#FFFFFF" class=""> Hi
                    Guido, <span class="moz-smiley-s1"><span class="">:-)</span></span><br
                      class="">
                    <br class="">
                    have you tried the cnMissingValFillColor resource to
                    set the color for missing value?<br class="">
                    <strong class=""></strong><strong class=""><br
                        class="">
                      <font class="" color="#3333ff"><tt class=""> </tt></font></strong><font
                      class="" color="#3333ff"><tt class="">
                        ResC@cnFillPalette         = cmap_r<br class="">
                      </tt><tt class="">  ResC@cnMissingValFillColor = 0</tt></font><br
                      class="">
                    <br class="">
                    Bye,<br class="">
                    Karin<br class="">
                    <strong class=""><strong class=""><br class="">
                      </strong></strong>
                    <div class="moz-cite-prefix">Am 29.09.17 um 16:55
                      schrieb Guido Cioni:<br class="">
                    </div>
                    <blockquote type="cite"
                      cite="mid:6B489662-864F-4E89-8B39-A8B6BF97D94D@gmail.com"
                      class="">
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                        class="">
                      Hi,
                      <div class="">I'm trying to plot filled contour of
                        wind speed overlaid on a map. In order to mask
                        small values of winds I've both masked the
                        original data and set the first color of the
                        color palette as transparent, i.e. </div>
                      <div class=""><br class="">
                      </div>
                      <div class="">
                        <div class=""><font class="" face="Menlo">cmap_r=read_colormap_file("wind_17lev")</font></div>
                        <div class=""><font class="" face="Menlo">cmap_r(0,3)=0.0</font></div>
                        <div class=""><font class="" face="Menlo">ResC@cnFillPalette=
                            cmap_r</font></div>
                      </div>
                      <div class=""><br class="">
                      </div>
                      <div class="">However, when drawing with
                        ResC@cnFillMode = "RasterFill", this causes the
                        Missing Values to be coloured with white instead
                        that being transparent, as you can see in the
                        attached picture. </div>
                      <div class=""><br class="">
                      </div>
                      <br class="">
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                        class="">
                      <div class="">Going back to old discussion this
                        seems to be an old problem that was fixed in
                        6.2.0. Am I wrong? </div>
                      <div class=""><br class="">
                      </div>
                      <div class="">I'm attaching the script that I'm
                        using, although it is not 100% clean.</div>
                      <div class="">Cheers </div>
                      <br class="">
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                            Guido Cioni</div>
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