<div dir="ltr">Check your original source data file for an extra set of coordinates, lat and lon, or similar names. x_t and y_t are not lat and lon, they are projection coordinates, probably in meters. If lat and lon are not in the original file, you might also be able to request them from the data source.<div><br></div><div>See recent thread about OSGB grid for method of using the supplemental coordinates.<div><br><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Mar 13, 2021 at 1:38 AM Chathurika via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p style="font-family:Arial">
<span style="font-size:16px;font-family:Georgia">Hello,</span>
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<span style="font-size:16px;font-family:Georgia">Thank you very much for reading my email. </span>
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<span style="font-size:16px;font-family:Georgia"><br>
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<span style="font-size:16px;font-family:Georgia">I have downscaling data in Atlantic and Arctic Oceans. But It has no attached coordinates. I want to plot these data on a polar map with coordinates. </span>
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<span style="font-size:16px;font-family:Georgia">This is the variable summary;</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>Copyright (C) 1995-2018 - All Rights Reserved</span>
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<p style="margin-bottom:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;white-space:normal">
<span style="font-variant-ligatures:no-common-ligatures"><span> </span>University Corporation for Atmospheric Research</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>NCAR Command Language Version 6.5.0</span>
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<p style="margin-bottom:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;white-space:normal">
<span style="font-variant-ligatures:no-common-ligatures"><span> </span>The use of this software is governed by a License Agreement.</span>
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<p style="margin-bottom:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;white-space:normal">
<span style="font-variant-ligatures:no-common-ligatures"><span> </span>See <a href="http://www.ncl.ucar.edu/" target="_blank">http://www.ncl.ucar.edu/</a> for more details.</span>
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<span style="font-variant-ligatures:no-common-ligatures">Variable: zos1</span>
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<span style="font-variant-ligatures:no-common-ligatures">Type: float</span>
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<span style="font-variant-ligatures:no-common-ligatures">Total Size: 2548039680 bytes</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>637009920 values</span>
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<span style="font-variant-ligatures:no-common-ligatures">Number of Dimensions: 3</span>
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<span style="font-variant-ligatures:no-common-ligatures">Dimensions and sizes: [Time | 240] x [y_t | 1728] x [x_t | 1536]</span>
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<span style="font-variant-ligatures:no-common-ligatures">Coordinates:<span> </span></span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>Time: [7.260877e+09..7.8894e+09]</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>y_t: [0.5..1727.5]</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>x_t: [0.5..1535.5]</span>
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<span style="font-variant-ligatures:no-common-ligatures">Number Of Attributes: 5</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>grid : TS</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>missing_value : -1e+34</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>units : m</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>long_name : Sea Surface Height</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>_FillValue : -1e+34</span>
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<span style="font-variant-ligatures:no-common-ligatures">Variable: xt</span>
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<span style="font-variant-ligatures:no-common-ligatures">Type: float</span>
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<span style="font-variant-ligatures:no-common-ligatures">Total Size: 6144 bytes</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>1536 values</span>
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<span style="font-variant-ligatures:no-common-ligatures">Number of Dimensions: 1</span>
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<span style="font-variant-ligatures:no-common-ligatures">Dimensions and sizes: [x_t | 1536]</span>
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<span style="font-variant-ligatures:no-common-ligatures">Coordinates:<span> </span></span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>x_t: [0.5..1535.5]</span>
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<span style="font-variant-ligatures:no-common-ligatures">Number Of Attributes: 2</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>long_name : X on T grid</span>
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<span style="font-variant-ligatures:no-common-ligatures"><span> </span>units :</span>
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<span style="font-size:16px;font-family:Georgia">If I plot the data as a contour plot using "</span><span style="font-family:Georgia;font-size:16px">gsn_csm_contour" the figure looks like the attached png. Please help me to solve this. </span>
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<span style="font-family:Georgia;font-size:16px">Thank you very much and best regards,</span>
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<p style="margin-bottom:0px;font-variant-numeric:normal;font-variant-east-asian:normal;font-stretch:normal;font-size:11px;line-height:normal;font-family:Menlo;white-space:normal">
<span style="font-family:Georgia;font-size:16px">Chathu</span></p>
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[image]<span style="font-family:Arial"><blockquote style="margin:0px 0px 0px 40px;padding:0px;font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:small;font-variant-ligatures:normal;border:none">
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<span style="font-style:italic"><span style="font-size:x-small">Wickramage Chathurika Hemamali</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">Msc in Physical Oceanography</span></span>
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<div id="m_-3860502895539816637ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2251">
<span style="font-style:italic"><span style="font-size:x-small">State Key Laboratory of Tropical Oceanography</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">South China Sea Institute of Oceanology</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">University of Chinese Academy of Science</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">China</span></span>
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<i><span style="font-size:xx-small">Specialized in Oceanography and Marine Geology (Bachelor)</span></i>
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<div id="m_-3860502895539816637ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2264" style="font-size:small">
<i><span style="font-size:xx-small">University of Ruhuna</span></i>
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<i><span style="font-size:xx-small">Matara</span></i>
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<i><span style="font-size:xx-small">Sri Lanka</span></i>
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<span style="font-style:italic;font-size:medium">Email : <a>wickramagechathurika@rocketmail.com</a></span>
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<span style="font-style:italic;font-size:medium"><a>chatu@scsio.ac.cn</a></span></div></blockquote></span></blockquote></div></div></div></div>