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<div class="moz-cite-prefix">Le 09/02/2024 à 18:13, Meyer, Jesse R.
(GSFC-618.0)[SCIENCE SYSTEMS AND APPLICATIONS INC] via gdal-dev a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:1936B52D-E52D-4AAB-8219-243B599B2973@ndc.nasa.gov">
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<p class="MsoNormal">I noticed a warning after converting a
gtiff image to jp2 stating ‘Warning 6: Unhandled projection
method Albers_Conic_Equal_Area’. The driver apparently
completes the conversion and happily reports the projection
correctly under gdalinfo. But I find it weird that the format
would care about the projection. Is this a serious warning?</p>
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</blockquote>
<p>It is a bit strange that you get this warning (especially since
this should be a projection method handled by GDAL) and get a SRS
after the projection.</p>
<p>It is fully expected that the JP2OpenJPEG driver tries to get
georeferencing from the metadata. There are several ways to embed
georeferencing in a JPEG2000 image : GeoJP2, GMLJP2. All
JPEG2000-capable drivers in GDAL share the same code to read that
georeferencing when present and expose it.<br>
</p>
<p>Any link to that JP2 image? (sometimes images have both GeoJP2
and GMLJP2, or possibly a side-car file. I'm wondering if the
warning might not come from an attempt at reading with one method,
and finally a fallback is used)<br>
</p>
Even<span style="white-space: pre-wrap">
</span>
<blockquote type="cite"
cite="mid:1936B52D-E52D-4AAB-8219-243B599B2973@ndc.nasa.gov">
<pre class="moz-quote-pre" wrap=""></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>
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