[gdal-dev] Reading Layers In USGS Geospatial Topo Files:

[Even Rouault]

Carl,

I don't have one such PDF at hand, but with one sample of the GDAL 
autotest suite:

$ gdalinfo autotest/gdrivers/data/pdf/adobe_style_geospatial.pdf -mdd LAYERS
[...]
Metadata (LAYERS):
   LAYER_00_NAME=New_Data_Frame
   LAYER_01_NAME=New_Data_Frame.Graticule
   LAYER_02_NAME=Layers
   LAYER_03_NAME=Layers.Measured_Grid
   LAYER_04_NAME=Layers.Graticule
[...]

Programatically, you can get this list of layers with 
Dataset.GetMetadata("LAYERS")

Then you can select layers you want to activate with the LAYERS open option:

gdal_translate autotest/gdrivers/data/pdf/adobe_style_geospatial.pdf 
out.tif -oo LAYERS=New_Data_Frame.Graticule,Layers.Graticule

or disable select ones with the LAYERS_OFF open option:

gdal_translate autotest/gdrivers/data/pdf/adobe_style_geospatial.pdf 
out.tif -oo LAYERS_OFF=New_Data_Frame.Graticule,Layers.Graticule

Programatically,

gdal.Translate("out.tif", gdal.OpenEx("in.pdf", open_options = 
["LAYERS=New_Data_Frame.Graticule,Layers.Graticule"])

Even

Le 25/03/2025 à 21:40, Carl Carlson via gdal-dev a écrit :
>
> 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
>
>
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