[poppler] Extracting geolocation metadata from a GeoPDF file

[Albert Astals Cid]

A Dimarts, 30 de març de 2010, Phil Endecott va escriure:
> Albert Astals Cid wrote:
> >> One aspect that I'm uncertain about is how to use the dict lookup
> >> method.  My understanding was that it takes a pointer to an object as
> >> the second parameter and copies the retrieved object there, and also
> >> returns a pointer to same object on success, or returns NULL on
> >> failure.  But this doesn't seem to be the case on failure.  How am I
> >> supposed to use this?
> > 
> > Check if the object is null (Object::isNull())
> 
> Thanks Albert, that works.
> 
> In the unlikely event that anyone else ever needs to extract the
> geolocation info from a GeoPDF (TerraGo format) and inject it into a
> TIFF to make a GeoTIFF, my code is at
> http://svn.chezphil.org/geopdf/trunk/ ; see e.g. the README for details.
> 
> 
> While looking at this I noted that these map PDFs have layers, which
> could be useful to me at some point in the future.  I don't see any
> support for turning layers on and off in the poppler API.  Am I missing
> something, or is this not (yet) supported?

With layers you mean OCG?

Albert

> 
> 
> Thanks,  Phil.
> 
> 
> 
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> 
> 
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