<div dir="ltr"><div>Hi Ashfaq,</div><div><br></div><div>There may be some functions for interpolation in the ECCO matlab/python packages. Personally, I've found the most robust way is griddatan in Matlab or scipy.griddata in python. If you have to do the interpolation multiple times over (e.g., for different time slices) then I would recommend scatteredInterpolant in Matlab. (I don't know if there's an equivalent in python but in any case I trust Matlab more.) This precomputes interpolation weights for a given set of scattered data points (e.g., the ECCO Arctic cap ). While the intent of this function is to let you repeatedly interpolate the *same* field to different target points (without having to recalculate the weights), there's an undocumented feature that also enables you to efficiently interpolate *different* fields. The scatteredInterpolant object exposes a struct with one of the fields being an array called 'Values'. To interpolate a different field all you have to do is replace the data in Values with the new data. Matlab won't know any better and will happily do the interpolation. I've used this approach for OSI-SAF ice velocity data.</div><div><br></div><div>Hope that helps.</div><div><br></div><div>Samar</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Jun 27, 2024 at 2:31 PM Ahmed, Ashfaq <<a href="mailto:ashfaq_ahmed@brown.edu" target="_blank">ashfaq_ahmed@brown.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Good morning team, <div><br></div><div>I am a PhD student at Brown University, and I study the dynamics of the near-surface circulation in the Arctic Ocean. As part of one of the projects, I am trying to make an intercomparison between the ECCO sea ice products (e.g., sea ice velocity, thickness, drift speed, curl, angle) with other reanalysis products (e.g., NSIDC, OSI-SAF).</div><div><br></div><div>To make this comparison, I need to convert the Arctic cap into a WGS-84 geocentric coordinate system. Because the coordinate reference system (CRS) for the rest of the products is WGS-84, and I want the ECCO to be the same for a perfect comparison. </div><div><br></div><div>I did not find any document that might allow me to make this conversion. Could you kindly help me with this? I would really appreciate any feedback from you!</div><div><br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><table cellspacing="0" cellpadding="0" border="0" style="color:rgb(34,34,34)"><tbody><tr><td valign="top" style="padding-right:15px;padding-left:7px;border-right:1px dotted rgb(135,127,116)"><img src="https://www.savebay.org/wp-content/uploads/Brown-Logo_2016_2-Color-Process-ST_1300.jpg" alt="Many thank to Brown University for sponsoring our 50th Anniversary celebration" width="81" height="96" style="margin-right:0px"></td><td width="400" valign="top" style="padding-left:15px"><div dir="ltr"><font face="arial, sans-serif" color="#000000">Thanks, </font></div><div dir="ltr"><font face="arial, sans-serif" color="#000000"><b>Ashfaq Ahmed</b> (he/his)</font></div><div dir="ltr"><font face="arial, sans-serif" color="#000000">Doctoral Student,</font></div><div dir="ltr"><font face="arial, sans-serif" color="#000000"><span style="color:rgb(11,83,148)"><a href="https://engineering.brown.edu/people/graduate-students/phd-students/phd-students-fluids-and-thermal-sciences" style="color:rgb(17,85,204)" target="_blank">Center for Fluids and Thermal Science</a></span></font></div><div dir="ltr"><span style="color:rgb(0,0,0);font-family:arial,sans-serif">School of Engineering, </span><span style="color:rgb(0,0,0);font-family:arial,sans-serif">Brown University</span></div><div dir="ltr"><font color="#000000" face="arial, sans-serif">Lab website: <a href="http://wilhelmuslab.me" target="_blank">wilhelmuslab.me</a></font></div><div dir="ltr"><div dir="ltr"><span style="font-family:arial,sans-serif"><font color="#000000">Email:</font><font color="#0b5394"> </font><a href="mailto:ramisa_fariha@brown.edu" style="color:rgb(11,83,148)" target="_blank">ashfaq_ahmed@brown.edu</a></span><font face="arial, sans-serif" color="#000000"><br></font></div></div><div dir="ltr"><font face="arial, sans-serif" color="#000000"><font color="#888888"><font face="arial, sans-serif" color="#000000"><b>Profile Links -</b></font></font></font></div><div dir="ltr"><b style="color:rgb(0,0,0);font-family:arial,sans-serif"><a href="https://www.linkedin.com/in/ashfaqahmed40/" style="color:rgb(17,85,204)" target="_blank">LinkedIn</a> | <a href="https://ashfaqnihalbuet.wixsite.com/website" style="color:rgb(17,85,204)" target="_blank">Website</a> | <a href="https://scholar.google.com/citations?user=iiSUYgsAAAAJ&hl=en&authuser=1" style="color:rgb(17,85,204)" target="_blank">Google Scholar</a> | <a href="https://www.researchgate.net/profile/Ashfaq-Ahmed-15" style="color:rgb(17,85,204)" target="_blank">ResearchGate</a></b><br></div><div dir="ltr">Providence, Rhode Island, USA</div></td></tr></tbody></table></div></div></div></div>
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