[gdal-dev] Puzzled about gdal_translate return all white image...

[Even Rouault]

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.

Le 21/08/2021 à 03:36, Carl Godkin a écrit :
> Hi,
> 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.
>
> These two command lines are exactly the same except that the failing 
> case has a smaller area:
>
> gdal_translate 
> "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 
> <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>" 
> wms.xml -of WMS
>
> gdal_translate \
>     -projwin 524136.39 5229915.17 527111.89 5226499.96 \
>     -projwin_srs EPSG:32610 \
>     -outsize 2500 0 \
>     wms.xml fails.tif
>
> gdal_translate \
>     -projwin 517947.80 5235658.96 528189.82 5224344.74 \
>     -projwin_srs EPSG:32610 \
>     -outsize 2500 0 \
>     wms.xml works.tif
>
> Can anyone explain what's going on here and (most likely!) what I'm 
> doing wrong?
>
> Thank you very much,
>
> carl
>
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