<div dir="ltr">Yes you will need to thin the vectors yourself. <div><br></div><div>There is the resource 'mpEllipticalBoundary' that will make the boundary around the map elliptical (circular in this case as a limiting case of elliptical). But you may also need to turn off the tickmarks. The polar stereographic has specialized tickmark code that can put the tickmarks around a circular boundary. In the general case however no tickmarks are provided for elliptical boundaries. It's not clear from this plot what projection you are using.</div><div> -dave</div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Oct 21, 2016 at 12:45 PM, Guido Cioni <span dir="ltr"><<a href="mailto:guidocioni@gmail.com" target="_blank">guidocioni@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">Wow, didn’t know about that option. Thanks a lot!<div>Unfortunately by using this it is impossible (I guess) to control the density of the arrows since they are drawn at every lat and lon specified in the arrays, which makes the plot not really readable (see attached). I set the arrow length to almost zero, so that only the head is visible, otherwise the plot was entirely filled with black...<img id="m_33220491730304116689691BF82-11E0-470B-8609-5689A3D7D099" height="716" width="716" src="cid:E42B1FD6-A0D9-4545-B61B-E0D2D683BABD@fritz.box"></div><div>I should find a way of making lat, lon, u and v arrays sparser, maybe.<br><div><br class="m_3322049173030411668webkit-block-placeholder"></div><div>Also, since you are here: is there any way of making the bounding box of the plot round instead of squared, in order to follow the interior shape?</div><div><br></div><div>Thanks.</div><span class="HOEnZb"><font color="#888888"><div>
<div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word"><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wrap:break-word"><div><br class="m_3322049173030411668Apple-interchange-newline">Guido Cioni</div><div><a href="http://guidocioni.altervista.org" target="_blank">http://guidocioni.altervista.<wbr>org</a> </div><div><br></div></div><br class="m_3322049173030411668Apple-interchange-newline" style="color:rgb(0,0,0);font-family:Helvetica;font-size:14px;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><br class="m_3322049173030411668Apple-interchange-newline"></div>
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<br><div><blockquote type="cite"><div>Il giorno 21 ott 2016, alle ore 19:58, David Brown <<a href="mailto:dbrown@ucar.edu" target="_blank">dbrown@ucar.edu</a>> ha scritto:</div><br class="m_3322049173030411668Apple-interchange-newline"><div><div>Yes Hoffman is right. That could be an option for you.<br> -dave<br><br>On Fri, Oct 21, 2016 at 11:57 AM, Hoffman Cheung<br><<a href="mailto:hoffmancheung@gmail.com" target="_blank">hoffmancheung@gmail.com</a>> wrote:<br><blockquote type="cite">Hi Guido,<br><br>May be you can try to draw the vector using wmvectmap?<br><br><a href="http://ncl.ucar.edu/Document/Functions/Built-in/wmvectmap.shtml" target="_blank">http://ncl.ucar.edu/Document/<wbr>Functions/Built-in/wmvectmap.<wbr>shtml</a><br><br>Cheers,<br>Hoffman<br><br><br><br>2016-10-21 11:19 GMT+02:00 Guido Cioni <<a href="mailto:guidocioni@gmail.com" target="_blank">guidocioni@gmail.com</a>>:<br><blockquote type="cite"><br>Hi all,<br>I believe this is more of a request for the developers.<br><br>Is there any way of making a vector plot using 1-D coordinate arrays? I’m<br>using data from an unstructured grid so that every time I have to plot<br>something I’m always using a variable similar to var(time, level, ncell)<br>which can be plotted with contours using the special resources sfXArray and<br>sfYArray. However, when doing vector plots the u and v component of the wind<br>MUST be 2-Dimensional according to the documentation. Thus, setting the<br>appropriate resources vfXArray, vfYArray does not help…<br>Is it something that will be implemented in 6.4 ?<br><br>Cheers<br><br>Guido Cioni<br><a href="http://guidocioni.altervista.org" target="_blank">http://guidocioni.altervista.<wbr>org</a><br><br><br><br><br><br>______________________________<wbr>_________________<br>ncl-talk mailing list<br><a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a><br>List instructions, subscriber options, unsubscribe:<br><a href="http://mailman.ucar.edu/mailman/listinfo/ncl-talk" target="_blank">http://mailman.ucar.edu/<wbr>mailman/listinfo/ncl-talk</a><br><br></blockquote><br><br>______________________________<wbr>_________________<br>ncl-talk mailing list<br><a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a><br>List instructions, subscriber options, unsubscribe:<br><a href="http://mailman.ucar.edu/mailman/listinfo/ncl-talk" target="_blank">http://mailman.ucar.edu/<wbr>mailman/listinfo/ncl-talk</a><br><br></blockquote></div></div></blockquote></div><br></div></div></div></div></blockquote></div><br></div>