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<p>Nothing wrong from your side, but the second command probably
selects a higher zoom level that has blank data given the
configuration/data available on the server side.<br>
</p>
<div class="moz-cite-prefix">Le 21/08/2021 à 03:36, Carl Godkin a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAE=8km=XxHc=Rb6yApVxEn_f15O+exWQdSOJ0snQzn6UTfkc0g@mail.gmail.com">
<div dir="ltr">Hi,
<div>I'm very puzzled about why gdal_translate (v. 3.3.1)
returns an all-white image when I select a smaller area than
with a working case with a larger area.</div>
<div><br>
</div>
<div>These two command lines are exactly the same except that
the failing case has a smaller area:</div>
<div><br>
</div>
<div>gdal_translate "<a
href="https://basemap.nationalmap.gov:443/arcgis/services/USGSImageryTopo/MapServer/WmsServer?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=0&SRS=EPSG:4326&BBOX=-179.999989,-89.000000,179.999988,89.000000"
moz-do-not-send="true">https://basemap.nationalmap.gov:443/arcgis/services/USGSImageryTopo/MapServer/WmsServer?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&LAYERS=0&SRS=EPSG:4326&BBOX=-179.999989,-89.000000,179.999988,89.000000</a>"
wms.xml -of WMS<br>
</div>
<div><br>
</div>
<div>gdal_translate \<br>
-projwin 524136.39 5229915.17 527111.89 5226499.96 \<br>
-projwin_srs EPSG:32610 \<br>
-outsize 2500 0 \<br>
wms.xml fails.tif<br>
<br>
gdal_translate \<br>
-projwin 517947.80 5235658.96 528189.82 5224344.74 \<br>
-projwin_srs EPSG:32610 \<br>
-outsize 2500 0 \<br>
wms.xml works.tif<br>
</div>
<div><br>
</div>
<div>Can anyone explain what's going on here and (most likely!)
what I'm doing wrong?</div>
<div><br>
</div>
<div>Thank you very much,</div>
<div><br>
</div>
<div>carl</div>
</div>
<br>
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
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My software is free, but my time generally not.</pre>
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