<div dir="ltr"><div class="gmail_default" style="font-size:small">If you are talking about plotting markers on a map, then I would use gsn_add_polymarker over a WRF map. See the attached example, which uses wrf_map_resources and gsn_csm_map to create a blank map using the map projection specified on the WRF output file. </div>
<div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Then, some dummy lat/lon locations are generated and drawn as brown dots on the map.</div><div class="gmail_default" style="font-size:small">
<br></div><div class="gmail_default" style="font-size:small">You can use any marker index in the marker index table:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style><a href="http://www.ncl.ucar.edu/Document/Graphics/Images/markers.png">http://www.ncl.ucar.edu/Document/Graphics/Images/markers.png</a><br>
</div><div class="gmail_default" style><br></div><div class="gmail_default" style>Or you can create your own set of markers using NhlNewMarker. This allows you to use any character in any of NCL's font tables as a marker. See:</div>
<div class="gmail_default" style><br></div><div class="gmail_default" style><a href="http://www.ncl.ucar.edu/Document/Graphics/font_tables.shtml">http://www.ncl.ucar.edu/Document/Graphics/font_tables.shtml</a><br></div><div class="gmail_default" style>
<a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/NhlNewMarker.shtml">http://www.ncl.ucar.edu/Document/Functions/Built-in/NhlNewMarker.shtml</a><br></div><div class="gmail_default" style><br></div><div class="gmail_default" style>
If you want to do a really nice 3D plot of air trajectories, I suggest looking into using Vapor. </div><div class="gmail_default" style><br></div><div class="gmail_default" style>You can see some samples at:</div><div class="gmail_default" style>
<br></div><div class="gmail_default" style><a href="https://www.vapor.ucar.edu/gallery/hurricane-sandy/hi-res">https://www.vapor.ucar.edu/gallery/hurricane-sandy/hi-res</a><br></div><div class="gmail_default" style><br></div>
<div class="gmail_default" style><br></div><div class="gmail_default" style="font-size:small">--Mary</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"><br>
</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sat, Jul 19, 2014 at 8:15 PM, Li Qi <span dir="ltr"><<a href="mailto:liqi123sh@qq.com" target="_blank">liqi123sh@qq.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div>Dear all,</div><div>I'd like to ask how to plot selected air parcel trajectories from WRF model output?</div><br>
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