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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Adam,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I am too lazy to use the same “res” for map and for polys,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That is where the warning msgs coming from.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank you so much for the example.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:white"><b><span style="font-size:17.0pt;font-family:"Lucida Handwriting";color:#1F497D">Wei Huang</span></b><span style="font-size:9.5pt;font-family:"Lucida Handwriting";color:#222222"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Adam Phillips [mailto:asphilli@ucar.edu]
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<b>Sent:</b> Tuesday, July 14, 2015 1:33 PM<br>
<b>To:</b> Wei Huang<br>
<b>Cc:</b> ncl-talk@ucar.edu<br>
<b>Subject:</b> Re: [ncl-talk] Add polyline, polygon, and polytext to a map generates two PNG files.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi Wei,<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">I have created a sample test script that draws a blank map, and adds a polyline, polymarker, and some text to a specific location on the map. I've attached the script and resulting png.
<o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Note that with all the gsn_add_* functions you have to keep the resulting output array from the gsn_add_* functions. From the gsn_add_polyline documentation:<br>
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"The value(s) returned from this function must be assigned to a unique variable. This is necessary so that the polyline(s) "live" for the duration of the NCL script. This is especially imperative if the call to
<strong>gsn_add_polyline</strong> is inside a function or procedure."<br>
<a href="https://www.ncl.ucar.edu/Document/Graphics/Interfaces/gsn_add_polyline.shtml">https://www.ncl.ucar.edu/Document/Graphics/Interfaces/gsn_add_polyline.shtml</a><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">In my test script I assigned the output to dum0, dum1 and dum2. I could have created an array: dum = new(3,graphic) and assigned the output to dum(0), dum(1) and dum(2).. Either way, I cannot delete or overwrite
the output arrays (dum or dum0, dum1, dum2)..<o:p></o:p></p>
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<p class="MsoNormal">Hope that all makes sense!<o:p></o:p></p>
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<p class="MsoNormal">Adam<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, Jul 14, 2015 at 12:18 PM, Wei Huang <<a href="mailto:whuang@univ-wea.com" target="_blank">whuang@univ-wea.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Adam,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I used gsn_add_* suite for the polylines, polygons, polytexts.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">If I set:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> res = True</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> res@gsnDraw = False</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> res@gsnFrame = False</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">It can turn off (eliminate) the blank map, but later, there are a whole bunch of warning msgs,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">warning:gsnDraw/gsnFrame is not a valid resource in graphic_style at this time.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">This make it hard to read other msgs.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks,</span><o:p></o:p></p>
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<b><span style="font-size:17.0pt;font-family:"Lucida Handwriting";color:#1F497D">Wei Huang</span></b><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Adam Phillips [mailto:<a href="mailto:asphilli@ucar.edu" target="_blank">asphilli@ucar.edu</a>]
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<b>Sent:</b> Tuesday, July 14, 2015 1:07 PM<br>
<b>To:</b> Wei Huang<br>
<b>Cc:</b> <a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a><br>
<b>Subject:</b> Re: [ncl-talk] Add polyline, polygon, and polytext to a map generates two PNG files.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi Wei,<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">It depends on what functions/procedures you are using to draw your polylines/markers/text.. In all cases you should set gsnFrame = False in your res resource list.
<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">I prefer the gsn_add_* suite of functions to do what you are doing as it allows paneling. For those functions you also need to add gsnDraw = False to your res resource list.<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">If you are just using gsn_text/gsn_polygon/gsn_polygon you can get away with not setting gsnDraw as is shown in polygon example #8 here:<br>
<a href="https://www.ncl.ucar.edu/Applications/Scripts/polyg_8.ncl" target="_blank">https://www.ncl.ucar.edu/Applications/Scripts/polyg_8.ncl</a><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hope that helps!<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Adam<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On Tue, Jul 14, 2015 at 10:05 AM, Wei Huang <<a href="mailto:whuang@univ-wea.com" target="_blank">whuang@univ-wea.com</a>> wrote:<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">I am trying to add polyline, polygon, and polytext to a map, steps as below:<br>
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res = ...<br>
wks = ...<br>
map = gsn_csm_map(wks, res)<br>
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;add lots of polylines, polygons, and polytexts to map<br>
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draw(map)<br>
frame(wks)<br>
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It generates two PNG files. With the first just a map.<br>
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How can I remove the first blank map?<br>
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Thanks,<br>
<br>
Wei Huang<br>
<a href="mailto:whuang@univ-wea.com" target="_blank">whuang@univ-wea.com</a><br>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#888888">Adam Phillips
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#888888">Associate Scientist, Climate and Global Dynamics Laboratory, NCAR</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#888888"><a href="http://www.cgd.ucar.edu/staff/asphilli/" target="_blank">www.cgd.ucar.edu/staff/asphilli/</a>
<a href="tel:303-497-1726" target="_blank">303-497-1726</a> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#888888">Adam Phillips </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#888888">Associate Scientist, Climate and Global Dynamics Laboratory, NCAR</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#888888"><a href="http://www.cgd.ucar.edu/staff/asphilli/" target="_blank">www.cgd.ucar.edu/staff/asphilli/</a> 303-497-1726
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