[gdal-dev] how to get gis layer information from GeoPDF (e.g. retrieve building polygon coordinates)

[Frank Warmerdam]

Jared,

I looked into the Poppler library a while ago and decided it was
possible to use it in a way that would allow extracting features
at the vector level from GeoPDF.  However, it also looked to be
quite a complex task and it would be capturing vector drawing
primitives which might not be 1:1 with the GIS features used to
produce the pdf.   I'm thinking 2-3 months work to do a decent
job of an OGR GeoPDF driver and even at that it would not be
returning nice GIS features - just gis objects with some attributes
about the draw style.

Best regards,


On Fri, Dec 2, 2011 at 2:19 PM, Jared Rubin <JARED.RUBIN at saic.com> wrote:
> Even,
> Would it be possible to do an ogr driver to get the vector features (I guess
> similar to shape files? Or maybe update the pdf driver to dump  each
> indivual vector feature into gdal metadata?
> I'm not too familiar with GeoPDF, I just have seen how Adobe allows for
> selection of specific vectors/objects/etc.
>
> thanks
> Jared
>
>
> On 12/2/11 3:14 PM, "Even Rouault" <even.rouault at mines-paris.org> wrote:
>
>> Le vendredi 02 décembre 2011 22:46:29, Jared Rubin a écrit :
>>> I am looking at a few sample GeoPDF files in acrobat reader.
>>> For example to retrieve the Parcel lot features from the Town of OakVille
>>> example
>>> http://acrobatusers.com/gallery/geospatial
>>>
>>> Is this layer information available from the gdal pdf driver.
>>> I have successfully built the gdal trunk using podofo and have run gdalinfo
>>> on this file
>>
>> The driver will rasterize the whole layers at once. You cannot render one
>> layer in particular, and there's no support for retrieving the coordinates of
>> vector features.
>>
>>> Also is this available with the python binding
>>
>> Yes, but with the above limits
>>
>>> Thanks
>>> Jared
>
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