<div dir="ltr">Hi LSL,<div>I do not have any experience with rcm2rgrid, but I would guess that the interpolated region is correct. Looking at your two plots, the domain in the first plot curves southeastward on the map. The resulting regridded array seemingly does the same. If you drew the same box on the first plot that you drew on the second, I think you'll see both data arrays go outside the box. As far as the possible east/north shift: I think that has to do with your target grid (and size of the individual grid boxes), and that there is actually no shift. If you chose a different target grid shifted a bit farther south and east, I think those boundary grid points that are somewhat outside the box would disappear. </div><div>Hope that helps!</div><div>Adam </div><div><br></div><div> </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 24, 2021 at 7:51 AM LSL 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:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p> </p>
<p style="margin-bottom:0in;line-height:100%">Dear NCL
community,</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">I am trying to
regrid WRF outputs (Lambert Conformal Projection, 3km) to
rectilinear
grids (lat/lon, 0.5 degree) using rcm2rgrid.</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">It is found that
the boundary of converted rectilinear grids are not exactly
aligned with
the black square lat/lon frame. As shown in the figure attached,
they are a little
drifted northward and eastward. </p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">Anyone can tell
me where is the problem? The script is also attached.</p>
<p style="margin-bottom:0in;line-height:100%"><br>
</p>
<p style="margin-bottom:0in;line-height:100%">LSL</p>
<p>
</p>
</div>
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