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Javier,
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* use TILED=YES by default in GTiff driver<br>
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<div>Was that decided? As some people pointed (including me) a
big tiled geotiff without overviews take ages to load in
QGIS.</div>
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<p>No, pretty much all items are still just ideas (well, perhaps
besides enabling Python exceptions by default, which I can't
really imagine postponing any further than a 4.0 :-)), some of
them not necessarily desirable or turning out to not be easily
implementable. Most of them will only make sense if we have
sufficient community buy-in, as they'll break things for existing
users.<br>
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<p>Your concern about big tiled geotiff without overviews is a real
one. One idea I just got to avoid that that just came to mind
(possibly not a good one as I'm detailing it, but anyway here's my
brain dump :-)) could be that on creation of a tiled GeoTIFF
larger than let's say 10k x 10k pixels, GDAL would automatically
create a nearest-neighbour overview of let's say at most 512
pixels in width and height and update it whenever a tile is
updated,. So the overview would likely have to be uncompressed
(not entirely clear if all GeoTIFF capable software around is able
to deal with different compression methods for overviews versus
full resolution image), so its size remains constant when tiles
are updated. And it would have to be discarded when explicit ones
are created. And the logic of selection of overviews would also
have to be modified to select that overview in a more aggressive
way than the current logic does (cf
<a class="moz-txt-link-freetext" href="https://gdal.org/api/gdaldataset_cpp.html#_CPPv4N11GDALDataset8RasterIOE10GDALRWFlagiiiiPvii12GDALDataTypeiPi8GSpacing8GSpacing8GSpacingP20GDALRasterIOExtraArg">https://gdal.org/api/gdaldataset_cpp.html#_CPPv4N11GDALDataset8RasterIOE10GDALRWFlagiiiiPvii12GDALDataTypeiPi8GSpacing8GSpacing8GSpacingP20GDALRasterIOExtraArg</a>).
Perhaps an open option that a viewer such as QGIS could set? So
quite a bunch of extra complications in the GeoTIFF driver which
is already super complicated.</p>
<p>Even</p>
<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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