<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body>
<p>Hi Michael,</p>
<p>I guess this is finally the perfect use case we were waiting for
to find a good reason to embed a Small Language Model within GDAL
to figure out what are the columns and lines axis. In the
meantime, the boring <a class="moz-txt-link-freetext" href="https://github.com/OSGeo/gdal/pull/12700">https://github.com/OSGeo/gdal/pull/12700</a> will
fix it</p>
<p>Even<br>
</p>
<div class="moz-cite-prefix">Le 04/07/2025 à 00:48, Michael Sumner
via gdal-dev a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAAcGz988aCkEG0T=RXYDUGo-W4h1LRwjoN7xz0cV-HH2BKHMew@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div>I'm confused about the orientation of this in 2D mode
1485x1272 is correct, with 122 bands. <br>
<br>
(requires earthdata auth)<br>
<br>
gdal raster info "/vsicurl/<a
href="https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc"
moz-do-not-send="true" class="moz-txt-link-freetext">https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc</a>"
--output-format text | grep /rhos<br>
# SUBDATASET_1_NAME=NETCDF:"/vsicurl/<a
href="https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc"
moz-do-not-send="true" class="moz-txt-link-freetext">https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc</a>":/geophysical_data/rhos<br>
# SUBDATASET_1_DESC=[1485x1272x122] /geophysical_data/rhos
(32-bit floating-point)<br>
<br>
If we drill into the rhos sds X becomes unrolled as the 1485
bands: <br>
<br>
gdal raster info "vrt:///vsicurl/<a
href="https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc?sd_name=/geophysical_data/rhos"
moz-do-not-send="true" class="moz-txt-link-freetext">https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc?sd_name=/geophysical_data/rhos</a>"
--output-format text | grep "Size"<br>
#Size is 122, 1272<br>
<br>
We can (redundantly??) cast via mdim to get 1485x1272, but
then we've lost the geolocation arrays: <br>
<br>
gdal raster info "vrt:///vsicurl/<a
href="https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc?transpose=/geophysical_data/rhos:0,1"
moz-do-not-send="true" class="moz-txt-link-freetext">https://obdaac-tea.earthdatacloud.nasa.gov/ob-cumulus-prod-public/PACE_OCI.20250501T234515.L2.SFREFL.V3_0.nc?transpose=/geophysical_data/rhos:0,1</a>"
--output-format text | grep "Size"<br>
#Size is 1485, 1272<br>
<br>
At any rate in the default case the geolocation arrays don't
match the data orientation. </div>
<div><br>
</div>
<div>Cheers, Mike</div>
<div> </div>
<div><br>
</div>
<span class="gmail_signature_prefix">-- </span><br>
<div dir="ltr" class="gmail_signature"
data-smartmail="gmail_signature">
<div dir="ltr">
<div dir="ltr" style="color:rgb(34,34,34)">
<div dir="ltr">Michael Sumner</div>
<div dir="ltr">Ordinary Member, Streets People Love
Hobart Association<br>
Research Software Engineer<br>
Australian Antarctic Division<br>
Hobart, Australia</div>
<div dir="ltr">0438489030<br>
e-mail: <a href="mailto:mdsumner@gmail.com"
style="color:rgb(17,85,204)" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">mdsumner@gmail.com</a></div>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
gdal-dev mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gdal-dev@lists.osgeo.org">gdal-dev@lists.osgeo.org</a>
<a class="moz-txt-link-freetext" href="https://lists.osgeo.org/mailman/listinfo/gdal-dev">https://lists.osgeo.org/mailman/listinfo/gdal-dev</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.spatialys.com">http://www.spatialys.com</a>
My software is free, but my time generally not.</pre>
</body>
</html>