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Dear Barry,</div>
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The description of remapgrid according to CDO documentation is:</div>
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This module contains operators for a first order conservative remapping of fields between grids in spherical coordinates. The operators in this module uses code from the YAC software package to compute the conservative remapping weights. For a detailed description
of the interpolation method see [SCRIP] (<a href="https://github.com/SCRIP-Project/SCRIP/blob/master/SCRIP/doc/SCRIPusers.pdf">https://github.com/SCRIP-Project/SCRIP/blob/master/SCRIP/doc/SCRIPusers.pdf</a>). The interpolation method is completely general
and can be used for any grid on a sphere. The search algorithm for the conservative remapping requires that no grid cell occurs more than once.<br>
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According to my experience it needs grid corners. I do not know if it works with point data.</div>
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Best wishes,</div>
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Beata</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Barry Lynn <barry.h.lynn@gmail.com><br>
<b>Sent:</b> Friday, August 30, 2019 5:50 PM<br>
<b>To:</b> Beáta Szabó-Takács <szabo.b@czechglobe.cz><br>
<b>Cc:</b> ncl-talk <ncl-talk@ucar.edu><br>
<b>Subject:</b> Re: [ncl-talk] Grid Interpolation (Conservative?)</font>
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<div dir="ltr">Hi Beata:
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<div>Thank you. What does CDO stand for?</div>
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<div>I was just thinking it over, and I am not sure if point data can be conservantly transformed because it is just point, rather than gridded data.</div>
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<div>Barry</div>
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<div class="x_gmail_quote">
<div dir="ltr" class="x_gmail_attr">On Fri, Aug 30, 2019 at 6:04 PM Beáta Szabó-Takács <<a href="mailto:szabo.b@czechglobe.cz">szabo.b@czechglobe.cz</a>> wrote:<br>
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Dear Barry,</div>
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I do not know if <span style="color:rgb(0,0,0); font-family:calibri,arial,helvetica,sans-serif; font-size:12pt; background-color:rgba(0,0,0,0); display:inline">obj_anal_ic is conservative but the remapcon operator in CDO is conservative interpolation. </span></div>
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<span style="color:rgb(0,0,0); font-family:calibri,arial,helvetica,sans-serif; font-size:12pt; background-color:rgba(0,0,0,0); display:inline">I hope I could help you!</span></div>
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<span style="color:rgb(0,0,0); font-family:calibri,arial,helvetica,sans-serif; font-size:12pt; background-color:rgba(0,0,0,0); display:inline">Best regards,</span></div>
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<span style="color:rgb(0,0,0); font-family:calibri,arial,helvetica,sans-serif; font-size:12pt; background-color:rgba(0,0,0,0); display:inline">Beata</span></div>
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<div id="x_gmail-m_6119584279690717335divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> ncl-talk <<a href="mailto:ncl-talk-bounces@ucar.edu" target="_blank">ncl-talk-bounces@ucar.edu</a>> on behalf
of Barry Lynn via ncl-talk <<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>><br>
<b>Sent:</b> Friday, August 30, 2019 1:44 PM<br>
<b>To:</b> ncl-talk <<a href="mailto:ncl-talk@ucar.edu" target="_blank">ncl-talk@ucar.edu</a>><br>
<b>Subject:</b> [ncl-talk] Grid Interpolation (Conservative?)</font>
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<div dir="ltr">Hello:
<div><br>
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<div>I am using obj_anal_ic to interpolate data (lat/lon/value) to a coarser grid.</div>
<div><br>
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<div>I am wondering if the interpolation is conservative (the grid is a mercator grid).</div>
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<div>If not, is there a recommendation on which interpolation scheme to use?</div>
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<div>Thank you.</div>
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<div>Barry<br clear="all">
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<div dir="ltr">Barry H. Lynn, Ph.D
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<div>Senior Associate Scientist, Lecturer,</div>
<div>
<div><span style="color:rgb(136,136,136)">The Institute of the Earth Science, </span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">The Hebrew University of Jerusalem, </span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">Givat Ram, Jerusalem 91904, Israel </span><br style="color:rgb(136,136,136)">
</div>
<span style="color:rgb(136,136,136)">Tel: 972 547 231 170</span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">Fax: (972)-25662581</span></div>
</div>
<div><span style="color:rgb(136,136,136)"><br>
</span></div>
<div>C.E.O, Weather It Is, LTD<br>
Weather and Climate Focus<br>
<a href="http://weather-it-is.com" target="_blank">http://weather-it-is.com</a><br>
Jerusalem, Israel<br>
Local: 02 930 9525<br>
Cell: 054 7 231 170<br>
Int-IS: x972 2 930 9525<br>
<br>
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<div>
<div dir="ltr">Barry H. Lynn, Ph.D
<div>
<div>Senior Associate Scientist, Lecturer,</div>
<div>
<div><span style="color:rgb(136,136,136)">The Institute of the Earth Science, </span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">The Hebrew University of Jerusalem, </span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">Givat Ram, Jerusalem 91904, Israel </span><br style="color:rgb(136,136,136)">
</div>
<span style="color:rgb(136,136,136)">Tel: 972 547 231 170</span><br style="color:rgb(136,136,136)">
<span style="color:rgb(136,136,136)">Fax: (972)-25662581</span></div>
</div>
<div><span style="color:rgb(136,136,136)"><br>
</span></div>
<div>C.E.O, Weather It Is, LTD<br>
Weather and Climate Focus<br>
<a href="http://weather-it-is.com" target="_blank">http://weather-it-is.com</a><br>
Jerusalem, Israel<br>
Local: 02 930 9525<br>
Cell: 054 7 231 170<br>
Int-IS: x972 2 930 9525<br>
<br>
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