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    Hi Lyndon,<br>
    <br>
    the plot function gsn_csm_vector_scalar can't handle the @cn
    resources and gives the warnings. To get rid of the warnings
    separate the contour (res: contour and map) and vector resources
    (e.g. in vcres)  as shown in the attached script.<br>
    <br>
    To use the @vcLineArrowColor you have to set the
    @vcMonoLineArrowColor to True which is described in the
    documentation:<br>
<a class="moz-txt-link-freetext" href="http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcLineArrowColor">http://ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcLineArrowColor</a><br>
    <br>
    It is always a good idea to take a look at the resources
    documentation (and read) if a resource setting is not working as
    expected.<br>
    <br>
    Bye,<br>
    Karin<br>
    <br>
    <div class="moz-cite-prefix">Am 05.07.17 um 09:23 schrieb Lyndon
      Mark Olaguera:<br>
    </div>
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cite="mid:CA+V+8dWxxZC4fxMXGqeT=0Pb1+WLyNDAo3Zk5kokZGuEEHTYxg@mail.gmail.com"
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                        <div>Dear NCL-experts,</div>
                        <div><br>
                        </div>
                        <div><br>
                        </div>
                        <div>I am trying to overlay wind vectors over an
                          orthographic map but I am getting the
                          following warning messages:</div>
                        <div><br>
                        </div>
                        <div>
                          <div>warning:cnFillOn is not a valid resource
                            in proj_vector at this time</div>
                          <div>warning:cnLineLabelsOn is not a valid
                            resource in proj_vector at this time</div>
                          <div>warning:cnLevelSelectionMode is not a
                            valid resource in proj_vector at this time</div>
                          <div>warning:cnMinLevelValF is not a valid
                            resource in proj_vector at this time</div>
                          <div>warning:cnMaxLevelValF is not a valid
                            resource in proj_vector at this time</div>
                          <div>warning:cnLevelSpacingF is not a valid
                            resource in proj_vector at this time</div>
                          <div>warning:cnFillDrawOrder is not a valid
                            resource in proj_vector at this time</div>
                          <div>warning:cnLinesOn is not a valid resource
                            in proj_vector at this time</div>
                          <div>warning:cnFillPalette is not a valid
                            resource in proj_vector at this time</div>
                        </div>
                        <div><br>
                        </div>
                        <div><br>
                        </div>
                        <div>Also, when I try to use the <b>"LineArrow"</b>
                          as a glyph style, the color of the arrows are
                          "blue" and ignores whatever I set in <b>res@vcLineArrowColor
                            = "black".</b> I also tried using "<b>FilledArrow"
                          </b>as the glyph style and this solves the
                          issue. Nonetheless, I want to know why the
                          first one (LineArrow glyph style) does not
                          work and also the warning messages.</div>
                        <div><br>
                        </div>
                        <div><br>
                        </div>
                        <div>I'll appreciate any suggestion on how I can
                          do this correctly in NCL.</div>
                        <div><br>
                        </div>
                        <div>I am attaching my script and the output
                          here.</div>
                        <div>The sample data sets that I am using can be
                          found in this link:</div>
                        <div><br>
                        </div>
                        <div><a moz-do-not-send="true"
                            href="https://www.dropbox.com/s/8vwk894gkyof082/sample_data.zip?dl=0">https://www.dropbox.com/s/8vwk894gkyof082/sample_data.zip?dl=0</a><br>
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                        <div><br>
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                        <div>Lyndz</div>
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