Le mercredi 17 avril 2013 17:34:13, Eli Adam a écrit : > I found this in drafts and it appears I failed to send it. Sorry for > delay. Sent partly for the list archives at this point. > > On Sat, Jan 19, 2013 at 8:14 AM, Even Rouault > > <even.roua...@mines-paris.org> wrote: > >> Looking more closely at those files, I see that there are various > >> registration blocks. The algorithm up to now was to select the > >> registration block whose neatline covered the most area in terms of > >> pixels. In the case of > >> OR_Newport_North_20110824_TM_geo.pdf, those blocks are : > >> "UTM Grid and Projection" > >> "Orthoimage" > >> "Map Layers" > >> "Adjoining Quadrangles Diagram" > >> > >> The number and names of blocks may change, but in all USGS topo PDFs > >> samples I've tried, the "Map Layers" is always present and seems to the > >> one that lead to the best results, so I've just pushed a change to > >> select it when it is found. > > --config GDAL_PDF_NEATLINE is very helpful. Did you find the > registration name blocks with one of the supporting PDF libraries? Is > it possible to find these multiple registration name blocks from gdal? > (I tried: gdalinfo --debug on without success.) >
I can see them in the "PDF: Description = " lines $ gdalinfo --debug on ~/gdal/data/geopdf/OR_Newport_North_20110824_TM_geo.pdf PDF: DPI guessed from contents stream = 600.0509320574655 PDF: OGC Encoding Best Practice style detected PDF: LGIDict Version : 2.3 PDF: Description = UTM Grid and Projection PDF: This is the largest neatline for now PDF: LGIDict Version : 2.3 PDF: Description = Orthoimage PDF: Not the largest neatline. Skipping it PDF: LGIDict Version : 2.3 PDF: Description = Map Layers PDF: The "Map Layers" registration will be selected PDF: LGIDict Version : 2.3 PDF: Description = Adjoining Quadrangles Diagram PDF: Not the largest neatline. Skipping it PDF: Description = Map Layers [...] _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
