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<br>
I don't do this much, so I'm not sure this still applies.<br>
But here are my notes on the subject. I am on Linux <br>
now, so windows stuff is generally of no use to me.<br>
<br>
<br>
Convert GeoPDF to GeoTiff:<br>
<br>
Do this 1st:<br>
gdal_translate 'Mount Rose.pdf' 'Mount Rose2.tif' -of GTiff<br>
<br>
Do this 2nd:<br>
gdal_translate 'Mount Rose2.tif' 'Mount Rose.tif' -b 1 -b 2 -b 3
-mask 4 -co COMPRESS=JPEG -co PHOTOMETRIC=YCBCR --config
GDAL_TIFF_INTERNAL_MASK YES<br>
<br>
Works on Linux, but creates a HUGE file (~88 MG):<br>
gdal_translate -of GTiff -co "COMPRESS=DEFLATE" --config
GDAL_PDF_DPI 300 /home/mike/Documents/copy2/fv.pdf
/home/mike/Documents/copy2/fv-03.tif<br>
<br>
Best one to use on Windows, but does not work on Linux:<br>
C:\GDAL\bin\gdal\apps\gdal_translate -of GTiff C:\Copy\bm.pdf
C:\Copy\bm.tif --config GDAL_PDF_DPI 300 -co "COMPRESS=JPEG" -co
"JPEG_QUALITY=85"<br>
<br>
It takes 2 minutes and 15 seconds to process a 10.1MB GeoPDF file.<br>
<br>
Oddly on 10/1/2019 I had to copy all the DLL files from C:\GDAL\bin
into C:\GDAL\bin\gdal\apps<br>
to get this to work.<br>
<br>
Another good one:<br>
C:\Copy\bin\gdal\apps>gdal_translate -of GTiff C:\Copy\wp.pdf
C:\Copy\wpt.tif --config GDAL_PDF_DPI 300<br>
<br>
<br>
Don't use this:<br>
C:\Copy\bin\gdal\apps>gdal_translate -of GTiff -co "TILED=YES"
-co "TFW=YES" C:\<br>
Copy\wp.pdf C:\Copy\wpt.tif --config GDAL_PDF_DPI 300<br>
<br>
Don't use this:<br>
C:\Copy\bin\gdal\apps>gdal_translate -of GTiff -co "TILED=YES"
-co "TFW=YES" C:\Copy\wpt.tif --config GDAL_PDF_LAYERS_OFF
"Map_Collar","Map_Frame.Projection_and_Grids" --config
GDAL_PDF_DPI300<br>
<br>
<br>
Mike<br>
Houston, TX<br>
<br>
<br>
<div class="moz-cite-prefix">On 3/25/25 16:03,
<a class="moz-txt-link-abbreviated" href="mailto:gdal-dev-request@lists.osgeo.org">gdal-dev-request@lists.osgeo.org</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:mailman.12266.1742936605.8076.gdal-dev@lists.osgeo.org">
<pre>Date: Tue, 25 Mar 2025 13:40:18 -0700
From: Carl Carlson <a class="moz-txt-link-rfc2396E"
href="mailto:cacarlson@alumni.stanford.edu" moz-do-not-send="true"><cacarlson@alumni.stanford.edu></a>
To: <a class="moz-txt-link-abbreviated moz-txt-link-freetext"
href="mailto:gdal-dev@lists.osgeo.org" moz-do-not-send="true">gdal-dev@lists.osgeo.org</a>
Subject: [gdal-dev] Reading Layers In USGS Geospatial Topo Files:
Message-ID: <a class="moz-txt-link-rfc2396E"
href="mailto:2AEBA991-A148-4B9D-A2AA-4F8A6FC94F1F@alumni.stanford.edu"
moz-do-not-send="true"><2AEBA991-A148-4B9D-A2AA-4F8A6FC94F1F@alumni.stanford.edu></a>
Content-Type: text/plain; charset="utf-8"
I have almost no experience with GDAL or python, butI do have 57 years
programming experience. I need some help with GDAL. At 79 I don?t have
the time and energy to get deeply into these topics. I need a quick
solution
I am writing a program to copy selected layers from a 7.5? USGS
geospatial PDF Topo File and save them as geoTIFFs. My efforts with
gdalinfo, gdal.Open, and gdal.Translate have led me nowhere worthwhile.
I can?t find the layers. I just don?t know enough about this.
Would some kind person help me out with sample code?
Thanks</pre>
</blockquote>
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