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I am running Qgis 3.4.2 on Windows and I can load the new style
geopdf USGS 7.5' quads, including the imagery layer. <br>
It's slow and grinds qgis to a halt while it loads, but it does
work. The different layers, which are independently controllable in
Acrobat Reader are flattened when the topo is opened in Qgis, which
rasterizes the image and presents it as one raster, not separate
layers. <br>
USGS has made these maps much less useful by adding the aerial
imagery layer, at least for me. Qgis isn't the only application that
flattens the layers, and the imagery obscures way to much for my
taste. <br>
<br>
On 4/21/2020 12:22 PM, Mike Flannigan wrote:
<blockquote type="cite">
<br>
Much to my surprise I think you are correct.
<br>
QGIS can open a TIF file (and a zipped TIF file),
<br>
but I can't get a GeoPDF to open in QGIS. If I
<br>
convert the GeoPDF to a TIF with GDAL, it still
<br>
will not open and gives error "Missing Codec".
<br>
<br>
Very surprising. I know from past experience that
<br>
Global Mapper v6.04 will view TIF files that have
<br>
been converted from GeoPDF via GDAL.
<br>
<br>
<br>
Mike
<br>
<br>
<br>
On 4/20/20 5:00 PM, <a class="moz-txt-link-abbreviated" href="mailto:qgis-user-request@lists.osgeo.org">qgis-user-request@lists.osgeo.org</a> wrote:
<br>
<blockquote type="cite">It sounds like you downloaded a new USGS
product format called the GeoPDF. The ".pdf" suffix is the big
clue. I don't know if QGIS 3.2.3 can read those files. I would
try downloading the map in a different format. I don't know what
site you are using, but the USGS TopoView site
(<a class="moz-txt-link-freetext" href="https://ngmdb.usgs.gov/topoview/">https://ngmdb.usgs.gov/topoview/</a>) has the maps available as
JPEG, KMZ, GeoTIFF, and GeoPDF. I would recommend the GeoTIFF
format as all versions of QGIS support that.
<br>
<br>
Best,
<br>
++Eric Fielding
<br>
</blockquote>
<br>
<br>
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