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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