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<p>Jukka,</p>
<p>The source code was useful to figure out why BandCount was reset
to 0 in the cache :-) So it is related to the fact that there is
an extra time dimension, and such extra dimensions must be
specified according to
<a class="moz-txt-link-freetext" href="https://gdal.org/drivers/raster/wcs.html#range-and-dimension-subsetting">https://gdal.org/drivers/raster/wcs.html#range-and-dimension-subsetting</a></p>
<p>Adding -oo Subset="time(1985-12-31T00:00:00.000Z)" for example
solves the issue</p>
<p>It would be nice to have some warning message though. Might be
worth a ticket</p>
<p>Even<br>
</p>
<div class="moz-cite-prefix">Le 25/10/2021 à 22:51, Rahkonen Jukka
(MML) a écrit :<br>
</div>
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cite="mid:80164d4eac2e4c47afc586f4e41be0f0@maanmittauslaitos.fi">
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<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I do not understand what
could be wrong with this WCS. With direct WCS 2.0.1 requests
everything works fine.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">GetCapabilities:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a
href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&AcceptVersions=2.0.1&request=GetCapabilities"
moz-do-not-send="true">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&AcceptVersions=2.0.1&request=GetCapabilities</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">DescribeCoverage:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a
href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&version=2.0.1&request=DescribeCoverage&coverageID=ortokuva__ortokuva"
moz-do-not-send="true">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&version=2.0.1&request=DescribeCoverage&coverageID=ortokuva__ortokuva</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This is listing
DataRecord with three fields: red band, green band, and blue
band.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">GetCoverage:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><a
href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&version=2.0.1&request=GetCoverage&CoverageID=ortokuva__ortokuva&SUBSET=E(393450,393650)&SUBSET=N(7495450,7495650)&format=image/tiff"
moz-do-not-send="true">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?service=WCS&version=2.0.1&request=GetCoverage&CoverageID=ortokuva__ortokuva&SUBSET=E(393450,393650)&SUBSET=N(7495450,7495650)&format=image/tiff</a><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This sends a tiff file.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">With GDAL:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">gdalinfo -oo CLEAR_CACHE
"WCS:<a class="moz-txt-link-freetext" href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows</a>?"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I get the subdatasets.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="SV">gdalinfo
"WCS:<a class="moz-txt-link-freetext" href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva</a>"<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Looks good but I am not
sure what I should expect to see.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">gdal_translate -projwin
393450 7495650 393650 7495450
"WCS:<a class="moz-txt-link-freetext" href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva</a>"
wcs.tif<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">This gives an error:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Input file size is
1348357, 2316500<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ERROR 1: wcs.tif: Unable
to export GeoTIFF files with zero bands.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I can indeed see at the
end of the automatically generated XML file that the band
count is interpreted to be zero:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><Domain>E,N</Domain><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<Low>61254.6580619824,6623749.72946716</Low><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<High>735433.573091962,7782000.0</High><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<GridAxes>i,j</GridAxes><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<NoDataValue>,,</NoDataValue><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<BandCount>0</BandCount><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">
<Format>image/tiff</Format><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">…<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I tried to edit the band
count into 3 by hand, but GDAL is changing it back to zero.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">The example from the WCS
driver page <a
href="https://gdal.org/drivers/raster/wcs.html"
moz-do-not-send="true">
https://gdal.org/drivers/raster/wcs.html</a> that is
using the very same server and coverage does save an image
even there is no fundamental difference in the command.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">gdal_translate -oo
CACHE=wcs_cache -oo CLEAR_CACHE -oo INTERLEAVE=PIXEL
-projwin 377418 6683393.87938218 377717.879386966 6683094
-oo Subset="time(1985-01-01T00:00:00.000Z)" -outsize 60 0
"WCS:<a class="moz-txt-link-freetext" href="https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva">https://beta-karttakuva.maanmittauslaitos.fi/wcs/service/ows?version=2.0.1&coverage=ortokuva__ortokuva</a>"
scaled.tiff<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am using GDAL version
is 3.4.0dev from yesterday.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">-Jukka Rahkonen-<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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