Thanks, gdal_edit.py worked as you described, exactly what I needed for
these orienteering maps.
Yes, I wondered how OGR actually should interpret unstructured PDF
vectors...
I unsuccesfully tested with vector PDFs created by several softwares -
which softwares can actually create ogr-readable PDFs?
Le mercredi 19 octobre 2016 17:09:03, Andreas Oxenstierna a écrit :
Hi list
I want to attach georeferencing to existing vector PDF files that lacks
georef info.
This works without any issues using gdal:
gdal_translate -of PDF -a_srs EPSG:3006 -a_ullr 718500 6359200 726500
6369100 <infile> <outfile> --config GDAL_PDF_DPI 300
gdal_translate will not attach georeferencing to existing PDF file, but it will
create a new one, re-rasterizing its content.
Use rather gdal_edit.py : http://gdal.org/gdal_edit.html
That will just add the geospatial metadata and not change the rest of the PDF
content.
This will also work for "vector" PDF files (although your example is already
georeferenced)
but all attempts with ogr fails, even if the PDF driver is listed:
Unable to open datasource `k.pdf' with the following drivers.
-> PDF
I tested with https://www.nps.gov/hfc/carto/PDF/ANTImap1.pdf with the
same result, i.e. GDAL can read the vector PDF file but not OGR
ogrinfo --format pdf returns all available options etc.
The OGR PDF driver only recognize by default very specific formulations of
vector PDF that use the StructTreeRoot objects of the PDF specification, which
is not the case for this sample.
There was a feature actually not yet documented. Done now :
"""
If there is no such logical structure, the driver will not try to interpret
the vector content of the PDF, unless you defined the
OGR_PDF_READ_NON_STRUCTURED configuration option to YES."""
So try:
ogrinfo ANTImap1.pdf --config OGR_PDF_READ_NON_STRUCTURED YES
Note that the conversion from PDF vectors to OGR geometries can be rough for
some PDF objects.
I would like to use ogr2ogr so vector geospatial PDF's can be created.
Is this possible?
Yes.
And you can combine raster + vector as explained in the tutorial at
http://latuviitta.org/documents/Geospatial_PDF_maps_from_OSM_with_GDAL.pdf
(last link of the PDF driver documentation page)
The two sample links in the bottom of http://www.gdal.org/frmt_pdf.html
are broken.
I've removed/updated them
Even
--
Best regards
Andreas Oxenstierna
T-Kartor Geospatial AB
mobile: +46 733 206831
mailto: [email protected]
http://www.t-kartor.com
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