<div dir="ltr"><div class="gmail_default" style="font-size:small">Olivier,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">There's not enough information here for us to help you. First, it's important that you "look at your data" and understand what you are plotting. </div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Use "printVarSummary" to look at your data:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small"> printVarSummary(data) ; "data" should be replaced by the variable you are trying to plot</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Does "data" contain lat/lon coordinate arrays, or do you have to read lat/lon separately off the file? Usually, if your data is not showing up on a map it's because the lat/lon arrays have not been correctly specified.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">You can read this description that explains how to correctly overlay data on a map:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Document/Graphics/overlays_on_map.shtml">http://www.ncl.ucar.edu/Document/Graphics/overlays_on_map.shtml</a><br></div><div class="gmail_default"><br></div><div class="gmail_default">Also, sometimes it's a "draw order" issue. Your contours may be getting draw under a filled map. If this is the case, you can try setting:</div><div class="gmail_default"><br></div><div class="gmail_default"> res@cnFillDrawOrder = "postdraw"</div><div class="gmail_default"><br></div><div class="gmail_default"><br></div><div class="gmail_default" style="font-size:small">It would help if we could see your script, and also the output from "printVarSummary" of your variable.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Also, please take a look at the numerous plotting examples we have at:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Applications/">http://www.ncl.ucar.edu/Applications/</a><br></div><div class="gmail_default"><br></div><div class="gmail_default">Some simple "contour over a map" ones include:</div><div class="gmail_default"><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Applications/cylineq.shtml">http://www.ncl.ucar.edu/Applications/cylineq.shtml</a><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Applications/proj.shtml">http://www.ncl.ucar.edu/Applications/proj.shtml</a><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Applications/overlay.shtml">http://www.ncl.ucar.edu/Applications/overlay.shtml</a><br></div><div class="gmail_default"><br></div><div class="gmail_default"><div class="gmail_default">If you post more questions to ncl-talk, please review our posting guidelines first:</div><div class="gmail_default"><br></div><div class="gmail_default"><a href="http://www.ncl.ucar.edu/Support/posting_guidelines.shtml">http://www.ncl.ucar.edu/Support/posting_guidelines.shtml</a></div><div class="gmail_default"><br></div><div class="gmail_default">These guidelines give you some pointers about where to look for help, and how to best phrase your questions so that we can provide better answers.</div><div class="gmail_default"><br></div><div class="gmail_default">Good luck,</div></div><div class="gmail_default"><br></div><div class="gmail_default">--Mary</div><div class="gmail_default"><br></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default"><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Aug 4, 2015 at 1:23 PM, Olivier AMMON <span dir="ltr"><<a href="mailto:ammonavis@hotmail.com" target="_blank">ammonavis@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">hello ncl users<br>
<br>
<br>
i did not manage to plot a contour and a map on the same plot that do not have contour color filled over the land on the map.<br>
<br>
i have to plot my contour area only over the sea on my plot.<br>
<br>
thanks<br>
<br>
regards<br>
<br>
olivier<br>
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